1
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Swain A, Adarsh S, Biswas A, Bose S, Benicewicz BC, Kumar SK, Basu JK. Enhanced efficiency of water desalination in nanostructured thin-film membranes with polymer grafted nanoparticles. Nanoscale 2023. [PMID: 37366152 DOI: 10.1039/d3nr00777d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
Polyamide composite (PA-TFC) membranes are the state-of-the-art ubiquitous platforms to desalinate water at scale. We have developed a novel, transformative platform where the performance of such membranes is significantly and controllably improved by depositing thin films of polymethylacrylate [PMA] grafted silica nanoparticles (PGNPs) through the venerable Langmuir-Blodgett method. Our key practically important finding is that these constructs can have unprecedented selectivity values (i.e., ∼250-3000 bar-1, >99.0% salt rejection) at reduced feed water pressure (i.e., reduced cost) while maintaining acceptable water permeance A (= 2-5 L m-2 h-1 Bar-1) with as little as 5-7 PGNP layers. We also observe that the transport of solvent and solute are governed by different mechanisms, unlike gas transport, leading to independent control of A and selectivity. Since these membranes can be formulated using simple and low cost self-assembly methods, our work opens a new direction towards development of affordable, scalable water desalination methods.
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Affiliation(s)
- Aparna Swain
- Department of Physics, Indian Institute of Science Bangalore, 560012, India.
| | - S Adarsh
- Department of Physics, Indian Institute of Science Bangalore, 560012, India.
| | - Ashish Biswas
- Department of Physics, Indian Institute of Science Bangalore, 560012, India.
| | - Suryasarathi Bose
- Department of Materials Engineering, Indian Institute of Science Bangalore, 560012, Karnataka, India
| | - Brian C Benicewicz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, 29208, South Carolina, USA
| | - Sanat K Kumar
- Department of Chemical Engineering, Columbia University, New York, 10027, New York, USA
| | - J K Basu
- Department of Physics, Indian Institute of Science Bangalore, 560012, India.
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2
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Abstract
Diffusion-ordered spectroscopy (DOSY) 1H nuclear magnetic resonance (1H NMR) has become a powerful tool to characterize the molecular weights of polymers. Compared to common characterization techniques, such as size exclusion chromatography (SEC), DOSY is faster, uses less solvent, and does not require a purified polymer sample. Poly(methyl methacrylate) (PMMA), polystyrene (PS), and polybutadiene (PB) molecular weights were determined by the linear correlation between the logarithm of their diffusion coefficients (D) and the logarithm of their molecular weights based on SEC molecular weights. Here, we emphasize the importance of the preparation needed to generate the calibration curves, which includes choosing the correct pulse sequence, optimizing parameters, and sample preparation. The limitation of the PMMA calibration curve was investigated by increasing the dispersity of PMMA. Additionally, by accounting for viscosity in the Stokes-Einstein equation, a variety of solvents were used to produce a "universal" calibration curve for PMMA to determine molecular weight. Furthermore, we place a spotlight on the increasing importance of DOSY NMR being incorporated into the polymer chemist's toolbox.
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Affiliation(s)
- Eric Ruzicka
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St, Columbia, South Carolina 29203, United States
| | - Perry Pellechia
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St, Columbia, South Carolina 29203, United States
| | - Brian C Benicewicz
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St, Columbia, South Carolina 29203, United States
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3
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Gupta P, Ruzicka E, Benicewicz BC, Sundararaman R, Schadler LS. Dielectric Properties of Polymer Nanocomposite Interphases Using Electrostatic Force Microscopy and Machine Learning. ACS Appl Electron Mater 2023; 5:794-802. [PMID: 36873258 PMCID: PMC9979787 DOI: 10.1021/acsaelm.2c01331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 12/27/2022] [Indexed: 06/18/2023]
Abstract
Knowing the dielectric properties of the interfacial region in polymer nanocomposites is critical to predicting and controlling dielectric properties. They are, however, difficult to characterize due to their nanoscale dimensions. Electrostatic force microscopy (EFM) provides a pathway to local dielectric property measurements, but extracting local dielectric permittivity in complex interphase geometries from EFM measurements remains a challenge. This paper demonstrates a combined EFM and machine learning (ML) approach to measuring interfacial permittivity in 50 nm silica particles in a PMMA matrix. We show that ML models trained to finite-element simulations of the electric field profile between the EFM tip and nanocomposite surface can accurately determine the interface permittivity of functionalized nanoparticles. It was found that for the particles with a polyaniline brush layer, the interfacial region was detectable (extrinsic interface). For bare silica particles, the intrinsic interface was detectable only in terms of having a slightly higher or lower permittivity. This approach fully accounts for the complex interplay of filler, matrix, and interface permittivity on the force gradients measured in EFM that are missed by previous semianalytic approaches, providing a pathway to quantify and design nanoscale interface dielectric properties in nanodielectric materials.
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Affiliation(s)
- Praveen Gupta
- College
of Engineering and Mathematical Sciences, University of Vermont, Burlington, Vermont05405, United States
- Department
of Materials Science and Engineering, Rensselaer
Polytechnic Institute, Troy, New York12180, United States
| | - Eric Ruzicka
- College
of Arts and Sciences, University of South
Carolina, Columbia, South Carolina29208, United States
| | - Brian C. Benicewicz
- College
of Arts and Sciences, University of South
Carolina, Columbia, South Carolina29208, United States
| | - Ravishankar Sundararaman
- Department
of Materials Science and Engineering, Rensselaer
Polytechnic Institute, Troy, New York12180, United States
| | - Linda S. Schadler
- College
of Engineering and Mathematical Sciences, University of Vermont, Burlington, Vermont05405, United States
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4
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Chan SY, Jhalaria M, Huang Y, Li R, Benicewicz BC, Durning CJ, Vo T, Kumar SK. Local Structure of Polymer-Grafted Nanoparticle Melts. ACS Nano 2022; 16:10404-10411. [PMID: 35816726 DOI: 10.1021/acsnano.2c00643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Polymer-grafted nanoparticle (GNP) membranes show unexpected gas transport enhancements relative to the neat polymer, with a maximum as a function of graft molecular weight (MWg ≈ 100 kDa) for sufficiently high grafting densities. The structural origins of this behavior are unclear. Simulations suggest that polymer segments are stretched near the nanoparticle (NP) surface and form a dry layer, while more distal chain fragments are in their undeformed Gaussian states and interpenetrate with segments from neighboring NPs. This theoretical basis is derived by considering the behavior of two adjacent NPs; how this behavior is modified by multi-NP effects relevant to gas separation membranes is unexplored. Here, we measure and interpret SAXS data for poly(methyl acrylate)-grafted silica NPs and find that for very low MWgs, contact between GNPs obeys the two-NP theory─namely that the NPs act like hard spheres, with radii that are linear combinations of the NP core sizes and the dry zone dimensions; thus, the interpenetration zones relax into the interstitial spaces. For chains with MWg > 100 kDa, the interpenetration zones are in the contact regions between two NPs. These results suggest that for MWgs below the transition, gas primarily moves through a series of dry zones with favorable transport, with the interpenetration zone with less favorable transport properties in parallel. For higher MWgs, the dry and interpenetration zones are in series, resulting in a decrease in transport enhancement. The MWg at the transport maximum then corresponds to the chain length with the largest, unfavorable stretching free energy.
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Affiliation(s)
- Sophia Y Chan
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Mayank Jhalaria
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Yucheng Huang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Ruipeng Li
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Brian C Benicewicz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Christopher J Durning
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Thi Vo
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Sanat K Kumar
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
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5
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Jhalaria M, Jimenez AM, Mathur R, Tekell MC, Huang Y, Narayanan S, Benicewicz BC, Kumar SK. Long-Term Aging in Miscible Polymer Nanocomposites. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00332] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mayank Jhalaria
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Andrew M. Jimenez
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Reha Mathur
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Marshall C. Tekell
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Yucheng Huang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Suresh Narayanan
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Brian C. Benicewicz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Sanat K. Kumar
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
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6
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Bilchak CR, Jhalaria M, Adhikari S, Midya J, Huang Y, Abbas Z, Nikoubashman A, Benicewicz BC, Rubinstein M, Kumar SK. Understanding Gas Transport in Polymer-Grafted Nanoparticle Assemblies. Macromolecules 2022; 55:3011-3019. [PMID: 35978703 PMCID: PMC9377655 DOI: 10.1021/acs.macromol.1c02367] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We rationalize the unusual gas transport behavior of polymer-grafted nanoparticle (GNP) membranes. While gas permeabilities depend specifically on the chemistry of the polymers considered, we focus here on permeabilities relative to the corresponding pure polymer which show interesting, "universal" behavior. For a given NP radius, Rc, and for large enough areal grafting densities, σ, to be in the dense brush regime we find that gas permeability enhancements display a maximum as a function of the graft chain molecular weight, Mn. Based on a recently proposed theory for the structure of a spherical brush in a melt of GNPs, we conjecture that this peak permeability occurs when the densely grafted polymer brush has the highest, packing-induced extension free energy per chain. The corresponding brush thickness is predicted to be h max = 3 R c , independent of chain chemistry and σ, i.e., at an apparently universal value of the NP volume fraction (or loading), ϕNP, ϕNP,max = [Rc/(Rc + hmax)]3 ≈ 0.049. Motivated by this conclusion, we measured CO-2 and CH4 permeability enhancements across a variety of Rc, Mn and σ, and find that they behave in a similar manner when considered as a function of ϕNP, with a peak in the near vicinity of the predicted ϕNP,max. Thus, the chain length dependent extension free energy appears to be the critical variable in determining the gas permeability for these hybrid materials. The emerging picture is that these curved polymer brushes, at high enough σ behave akin to a two-layer transport medium - the region in the near vicinity of the NP surface is comprised of extended polymer chains which speed-up gas transport relative to the unperturbed melt. The chain extension free energy increases with increasing chain length, up to a maximum, and apparently leads to an increasing gas permeability. For long enough grafts, there is an outer region of chain segments that is akin to an unperturbed melt with slow gas transport. The permeability maximum and decreasing permeability with increasing chain length then follow naturally.
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Affiliation(s)
- Connor R. Bilchak
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Mayank Jhalaria
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Sabin Adhikari
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Jiarul Midya
- Institute of Physics, Johannes Gutenberg University Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - Yucheng Huang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Zaid Abbas
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Arash Nikoubashman
- Institute of Physics, Johannes Gutenberg University Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - Brian C. Benicewicz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Michael Rubinstein
- Department of Mechanical Engineering and Materials Science, Biomedical Engineering, Chemistry and Physics, Duke University, Durham, North Carolina 27708, United States
| | - Sanat K. Kumar
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
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7
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Parisi D, Buenning E, Kalafatakis N, Gury L, Benicewicz BC, Gauthier M, Cloitre M, Rubinstein M, Kumar SK, Vlassopoulos D. Universal Polymeric-to-Colloidal Transition in Melts of Hairy Nanoparticles. ACS Nano 2021; 15:16697-16708. [PMID: 34623796 PMCID: PMC8905532 DOI: 10.1021/acsnano.1c06672] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Two different classes of hairy self-suspended nanoparticles in the melt state, polymer-grafted nanoparticles (GNPs) and star polymers, are shown to display universal dynamic behavior across a broad range of parameter space. Linear viscoelastic measurements on well-characterized silica-poly(methyl acrylate) GNPs with a fixed core radius (Rcore) and grafting density (or number of arms f) but varying arm degree of polymerization (Narm) show two distinctly different regimes of response. The colloidal Regime I with a small Narm (large core volume fraction) is characterized by predominant low-frequency solidlike colloidal plateau and ultraslow relaxation, while the polymeric Regime II with a large Narm (small core volume fractions) has a response dominated by the starlike relaxation of partially interpenetrated arms. The transition between the two regimes is marked by a crossover where both polymeric and colloidal modes are discerned albeit without a distinct colloidal plateau. Similarly, polybutadiene multiarm stars also exhibit the colloidal response of Regime I at very large f and small Narm. The star arm retraction model and a simple scaling model of nanoparticle escape from the cage of neighbors by overcoming a hopping potential barrier due to their elastic deformation quantitatively describe the linear response of the polymeric and colloidal regimes, respectively, in all these cases. The dynamic behavior of hairy nanoparticles of different chemistry and molecular characteristics, investigated here and reported in the literature, can be mapped onto a universal dynamic diagram of f/[Rcore3/ν0)1/4] as a function of (Narmν0f)/(Rcore3), where ν0 is the monomeric volume. In this diagram, the two regimes are separated by a line where the hopping potential ΔUhop is equal to the thermal energy, kBT. ΔUhop can be expressed as a function of the overcrowding parameter x (i.e., the ratio of f to the maximum number of unperturbed chains with Narm that can fill the volume occupied by the polymeric corona); hence, this crossing is shown to occur when x = 1. For x > 1, we have colloidal Regime I with an overcrowded volume, stretched arms, and ΔUhop > kBT, while polymeric Regime II is linked to x < 1. This single-material parameter x can provide the needed design principle to tailor the dynamics of this class of soft materials across a wide range of applications from membranes for gas separation to energy storage.
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Affiliation(s)
- Daniele Parisi
- Department of Materials Science and Technology and FORTH, Institute of Electronic Structure and Laser, University of Crete, Heraklion 70013, Greece
| | - Eileen Buenning
- Department of Chemical Engineering, Columbia University, New York, New York 10025, United States
| | - Nikolaos Kalafatakis
- Department of Materials Science and Technology and FORTH, Institute of Electronic Structure and Laser, University of Crete, Heraklion 70013, Greece
| | - Leo Gury
- Department of Materials Science and Technology and FORTH, Institute of Electronic Structure and Laser, University of Crete, Heraklion 70013, Greece
- Molecular, Macromolecular Chemistry and Materials, ESPCI Paris, CNRS, PSL Research University, 75005 Paris, France
| | - Brian C Benicewicz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Mario Gauthier
- Department of Chemistry, Institute for Polymer Research, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Michel Cloitre
- Molecular, Macromolecular Chemistry and Materials, ESPCI Paris, CNRS, PSL Research University, 75005 Paris, France
| | - Michael Rubinstein
- Thomas Lord Departments of Mechanical Engineering and Materials Science, Biomedical Engineering, Chemistry, and Physics, Duke University, Durham, North Carolina 27708, United States
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo 001-0021, Japan
| | - Sanat K Kumar
- Department of Chemical Engineering, Columbia University, New York, New York 10025, United States
| | - Dimitris Vlassopoulos
- Department of Materials Science and Technology and FORTH, Institute of Electronic Structure and Laser, University of Crete, Heraklion 70013, Greece
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8
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Abstract
Bacterial resistance to antimicrobial compounds is a growing concern in medical and public health circles. Overcoming the adaptable and duplicative resistance mechanisms of bacteria requires chemistry-based approaches. Engineered nanoparticles (NPs) now offer unique advantages toward this effort. However, most in situ infections (in humans) occur as attached biofilms enveloped in a protective surrounding matrix of extracellular polymers, where survival of microbial cells is enhanced. This presents special considerations in the design and deployment of antimicrobials. Here, we review recent efforts to combat resistant bacterial strains using NPs and, then, explore how NP surfaces may be specifically engineered to enhance the potency and delivery of antimicrobial compounds. Special NP-engineering challenges in the design of NPs must be overcome to penetrate the inherent protective barriers of the biofilm and to successfully deliver antimicrobials to bacterial cells. Future challenges are discussed in the development of new antibiotics and their mechanisms of action and targeted delivery via NPs.
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Affiliation(s)
- Amjed Alabresm
- Department of Environmental Health Sciences, University of South Carolina, Columbia, South Carolina 29208, United States
- Department of Biological Development of Shatt Al-Arab & N. Arabian Gulf, Marine Science Centre, University of Basrah, Basrah, Iraq
| | - Savannah L Chandler
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Brian C Benicewicz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
- USC NanoCenter, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Alan W Decho
- Department of Environmental Health Sciences, University of South Carolina, Columbia, South Carolina 29208, United States
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9
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Bilchak CR, Jhalaria M, Huang Y, Abbas Z, Midya J, Benedetti FM, Parisi D, Egger W, Dickmann M, Minelli M, Doghieri F, Nikoubashman A, Durning CJ, Vlassopoulos D, Jestin J, Smith ZP, Benicewicz BC, Rubinstein M, Leibler L, Kumar SK. Tuning Selectivities in Gas Separation Membranes Based on Polymer-Grafted Nanoparticles. ACS Nano 2020; 14:17174-17183. [PMID: 33216546 DOI: 10.1021/acsnano.0c07049] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Polymer membranes are critical to many sustainability applications that require the size-based separation of gas mixtures. Despite their ubiquity, there is a continuing need to selectively affect the transport of different mixture components while enhancing mechanical strength and hindering aging. Polymer-grafted nanoparticles (GNPs) have recently been explored in the context of gas separations. Membranes made from pure GNPs have higher gas permeability and lower selectivity relative to the neat polymer because they have increased mean free volume. Going beyond this ability to manipulate the mean free volume by grafting chains to a nanoparticle, the conceptual advance of the present work is our finding that GNPs are spatially heterogeneous transport media, with this free volume distribution being easily manipulated by the addition of free polymer. In particular, adding a small amount of appropriately chosen free polymer can increase the membrane gas selectivity by up to two orders of magnitude while only moderately reducing small gas permeability. Added short free chains, which are homogeneously distributed in the polymer layer of the GNP, reduce the permeability of all gases but yield no dramatic increases in selectivity. In contrast, free chains with length comparable to the grafts, which populate the interstitial pockets between GNPs, preferentially hinder the transport of the larger gas and thus result in large selectivity increases. This work thus establishes that we can favorably manipulate the selective gas transport properties of GNP membranes through the entropic effects associated with the addition of free chains.
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Affiliation(s)
- Connor R Bilchak
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Mayank Jhalaria
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Yucheng Huang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Zaid Abbas
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
- Department of Chemistry, Wasit University, Hay Al-Rabea, Kut, Wasit, Iraq 52001
| | - Jiarul Midya
- Institute of Physics, Johannes Gutenberg University Mainz, Staudingerweg 7, D-55128 Mainz, Germany
| | - Francesco M Benedetti
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Daniele Parisi
- University of Crete, Department of Materials Science and Technology and FORTH, Institute of Electronic Structure and Laser, GR-71110 Heraklion, Greece
| | - Werner Egger
- Universität der Bundeswehr München, Institut für Angewandte Physik und Messtechnik LRT2, Werner-Heisenberg-Weg 39, Neubiberg D-85577, Germany
| | - Marcel Dickmann
- Universität der Bundeswehr München, Institut für Angewandte Physik und Messtechnik LRT2, Werner-Heisenberg-Weg 39, Neubiberg D-85577, Germany
| | - Matteo Minelli
- Department of Chemical Engineering, University of Bologna, Bologna BO 40136, Italy
| | - Ferruccio Doghieri
- Department of Chemical Engineering, University of Bologna, Bologna BO 40136, Italy
| | - Arash Nikoubashman
- Institute of Physics, Johannes Gutenberg University Mainz, Staudingerweg 7, D-55128 Mainz, Germany
| | - Christopher J Durning
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Dimitris Vlassopoulos
- University of Crete, Department of Materials Science and Technology and FORTH, Institute of Electronic Structure and Laser, GR-71110 Heraklion, Greece
| | - Jacques Jestin
- Laboratoire Léon Brillouin (LLB), CEA/CNRS UMR 12, CEA Saclay, 91191 Gif/Yvette Cedex, France
| | - Zachary P Smith
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Brian C Benicewicz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Michael Rubinstein
- Department of Mechanical Engineering and Materials Science, Biomedical Engineering, Chemistry and Physics, Duke University, Durham, North Carolina 27708, United States
| | - Ludwik Leibler
- Laboratoire Gulliver, CNRS UMR 7083, ESPCI Paris, PSL Research University, 75005 Paris, France
| | - Sanat K Kumar
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
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10
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Affiliation(s)
- Husam Alkhodairi
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Sebastian T. Russell
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Julia Pribyl
- Department of Chemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Brian C. Benicewicz
- Department of Chemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Sanat K. Kumar
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
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11
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Zhu T, Rahman MA, Benicewicz BC. Synthesis of Well-Defined Polyolefin Grafted SiO 2 Nanoparticles with Molecular Weight and Graft Density Control. ACS Macro Lett 2020; 9:1255-1260. [PMID: 35638619 DOI: 10.1021/acsmacrolett.0c00398] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Recent advances in surface-initiated polymerization have given rise to a range of brush nanocomposites and hybrid functional materials. However, the synthesis of pure polyolefin-grafted nanocomposites by surface-initiated ring-opening metathesis polymerization (SI-ROMP) is a significant challenge due to the particle aggregation and irreversible particle coupling. This study presents a synthetic approach toward well-defined poly(cyclooctene)- and polyethylene-grafted nanoparticles by tethering Grubbs third generation catalyst on the particle surface and initiating the polymerization in a rapid manner. This work also serves as a template to prepare other hairy nanoparticles and functions as a basis toward understanding their thermomechanical behaviors.
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Affiliation(s)
- Tianyu Zhu
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Md Anisur Rahman
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Brian C. Benicewicz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
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12
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Alabresm A, Chen YP, Wichter-Chandler S, Lead J, Benicewicz BC, Decho AW. Nanoparticles as antibiotic-delivery vehicles (ADVs) overcome resistance by MRSA and other MDR bacterial pathogens: The grenade hypothesis. J Glob Antimicrob Resist 2020; 22:811-817. [PMID: 32653724 PMCID: PMC8547500 DOI: 10.1016/j.jgar.2020.06.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 06/16/2020] [Accepted: 06/23/2020] [Indexed: 11/20/2022] Open
Abstract
Objectives: The aim of this study was to examine how the concentrated delivery of
less effective antibiotics, such as the β-lactam penicillin G, by
linkage to nanoparticles (NPs), could influence the killing efficiency
against various pathogenic bacteria, including methicillin-resistant
Staphylococcus aureus (MRSA) and other multidrug
resistant (MDR) strains. Methods: The β-lactam antibiotic penicillin G (PenG) was passively
sorbed to fluorescent polystyrene NPs (20 nm) that were
surface-functionalized with carboxylic acid (COO−-NPs) or
sulfate groups (SO4−-NPs) to form a PenG-NP
complex. Antimicrobial activities of PenG-NPs were evaluated against
Gram-negative and Gram-positive bacteria, including antibiotic resistant
strains. Disc diffusion, microdilution assays and live/dead staining were
performed for antibacterial assessments. Results: The results showed that bactericidal activities of PenG-NP complexes
were statistically significantly (P < 0.05) enhanced
against Gram-negative and Gram-positive strains, including MRSA and MDR
strains. Fluorescence imaging verified that NPs comigrated with antibiotics
throughout clear zones of MIC agar plate assays. The increased bactericidal
abilities of NP-linked antibiotics are hypothesized to result from the
greatly increased densities of antibiotic delivered by each NP to a given
bacterial cell (compared with solution concentrations of antibiotic), which
overwhelms the bacterial resistance mechanism(s). Conclusions: As a whole, PenG-NP complexation demonstrated a remarkable activity
against different pathogenic bacteria, including MRSA and MDR strains. We
term this the ‘grenade hypothesis’. Further testing and
development of this approach will provide validation of its potential
usefulness for controlling antibiotic-resistant bacterial infections.
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Affiliation(s)
- Amjed Alabresm
- Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, SC, United States; Center for Environmental Nanoscience and Risk (CENR), University of South Carolina, Columbia, SC, United States; Department of Biological Development of Shatt Al-Arab & N. Arabian Gulf, Marine Science Centre, University of Basrah, Basrah, Iraq
| | - Yung Pin Chen
- Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, SC, United States
| | - Savannah Wichter-Chandler
- Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, SC, United States
| | - Jamie Lead
- Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, SC, United States; Center for Environmental Nanoscience and Risk (CENR), University of South Carolina, Columbia, SC, United States
| | - Brian C Benicewicz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, United States
| | - Alan W Decho
- Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, SC, United States.
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13
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Barnett JW, Bilchak CR, Wang Y, Benicewicz BC, Murdock LA, Bereau T, Kumar SK. Designing exceptional gas-separation polymer membranes using machine learning. Sci Adv 2020; 6:eaaz4301. [PMID: 32440545 PMCID: PMC7228755 DOI: 10.1126/sciadv.aaz4301] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 03/02/2020] [Indexed: 05/22/2023]
Abstract
The field of polymer membrane design is primarily based on empirical observation, which limits discovery of new materials optimized for separating a given gas pair. Instead of relying on exhaustive experimental investigations, we trained a machine learning (ML) algorithm, using a topological, path-based hash of the polymer repeating unit. We used a limited set of experimental gas permeability data for six different gases in ~700 polymeric constructs that have been measured to date to predict the gas-separation behavior of over 11,000 homopolymers not previously tested for these properties. To test the algorithm's accuracy, we synthesized two of the most promising polymer membranes predicted by this approach and found that they exceeded the upper bound for CO2/CH4 separation performance. This ML technique, which is trained using a relatively small body of experimental data (and no simulation data), evidently represents an innovative means of exploring the vast phase space available for polymer membrane design.
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Affiliation(s)
- J. Wesley Barnett
- Department of Chemical Engineering, Columbia University, New York, NY, USA
| | - Connor R. Bilchak
- Department of Chemical Engineering, Columbia University, New York, NY, USA
| | - Yiwen Wang
- Department of Chemical Engineering, Columbia University, New York, NY, USA
| | - Brian C. Benicewicz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, USA
| | - Laura A. Murdock
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, USA
| | - Tristan Bereau
- Max Planck Institute for Polymer Research, Mainz, Germany
| | - Sanat K. Kumar
- Department of Chemical Engineering, Columbia University, New York, NY, USA
- Corresponding author.
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14
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Sakib N, Koh YP, Huang Y, Mongcopa KIS, Le AN, Benicewicz BC, Krishnamoorti R, Simon SL. Thermal and Rheological Analysis of Polystyrene-Grafted Silica Nanocomposites. Macromolecules 2020. [DOI: 10.1021/acs.macromol.9b02127] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Nazam Sakib
- Department of Chemical Engineering, Texas Tech University, Lubbock, Texas 79409, United States
| | - Yung P. Koh
- Department of Chemical Engineering, Texas Tech University, Lubbock, Texas 79409, United States
| | - Yucheng Huang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29201, United States
| | - Katrina Irene S. Mongcopa
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
| | - Amy N. Le
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
| | - Brian C. Benicewicz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29201, United States
| | - Ramanan Krishnamoorti
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
| | - Sindee L. Simon
- Department of Chemical Engineering, Texas Tech University, Lubbock, Texas 79409, United States
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15
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Abbas ZM, Khani MM, Tawfilas M, Marsh ZM, Stefik M, Benicewicz BC. Surface‐Initiated RAFT Polymerization of 2,3‐Dimethyl‐1,3‐butadiene on Silica Nanoparticles for Matrix‐free Methyl Rubber Nanocomposites. Journal of Polymer Science 2020. [DOI: 10.1002/pol.20190054] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zaid M. Abbas
- Department of Chemistry and BiochemistryUniversity of South Carolina Columbia South Carolina 29208
- Department of ChemistryWasit University Hay Al‐Rabea, Kut Wasit 52001 Iraq
| | - Mohammed M. Khani
- Department of Chemistry and BiochemistryUniversity of South Carolina Columbia South Carolina 29208
| | - Massimo Tawfilas
- Department of Materials ScienceUniversity of Milano‐Bicocca 20125 Milan Italy
| | - Zachary M. Marsh
- Department of Chemistry and BiochemistryUniversity of South Carolina Columbia South Carolina 29208
| | - Morgan Stefik
- Department of Chemistry and BiochemistryUniversity of South Carolina Columbia South Carolina 29208
| | - Brian C. Benicewicz
- Department of Chemistry and BiochemistryUniversity of South Carolina Columbia South Carolina 29208
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16
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Jimenez AM, Krauskopf AA, Pérez-Camargo RA, Zhao D, Pribyl J, Jestin J, Benicewicz BC, Müller AJ, Kumar SK. Effects of Hairy Nanoparticles on Polymer Crystallization Kinetics. Macromolecules 2019; 52:9186-9198. [PMID: 31866692 PMCID: PMC6906929 DOI: 10.1021/acs.macromol.9b01380] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 11/10/2019] [Indexed: 01/27/2023]
Abstract
We previously showed that nanoparticles (NPs) could be ordered into structures by using the growth rate of polymer crystals as the control variable. In particular, for slow enough spherulitic growth fronts, the NPs grafted with amorphous polymer chains are selectively moved into the interlamellar, interfibrillar, and interspherulitic zones of a lamellar morphology, specifically going from interlamellar to interspherulitic with progressively decreasing crystal growth rates. Here, we examine the effect of NP polymer grafting density on crystallization kinetics. We find that while crystal nucleation is practically unaffected by the presence of the NPs, spherulitic growth, final crystallinity, and melting point values decrease uniformly as the volume fraction of the crystallizable polymer, poly(ethylene oxide) or PEO, ϕPEO, decreases. A surprising aspect here is that these results are apparently unaffected by variations in the relative amounts of the amorphous polymer graft and silica NPs at constant ϕ, implying that chemical details of the amorphous defect apparently only play a secondary role. We therefore propose that the grafted NPs in this size range only provide geometrical confinement effects which serve to set the crystal growth rates and melting point depressions without causing any changes to crystallization mechanisms.
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Affiliation(s)
- Andrew M Jimenez
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Alejandro A Krauskopf
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Ricardo A Pérez-Camargo
- POLYMAT and Department of Polymer Science and Technology, Faculty of Chemistry, Basque Country University UPV/EHU, Paseo Lardizabal 3, 20018, Donostia-San Sebastián, Spain
| | - Dan Zhao
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Julia Pribyl
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Jacques Jestin
- Laboratoire Léon Brillouin, CEA Saclay, 91191 Gif-Sur-Yvette, France
| | - Brian C Benicewicz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Alejandro J Müller
- POLYMAT and Department of Polymer Science and Technology, Faculty of Chemistry, Basque Country University UPV/EHU, Paseo Lardizabal 3, 20018, Donostia-San Sebastián, Spain.,Ikerbasque, Basque Science Foundation, Bilbao, Spain
| | - Sanat K Kumar
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
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17
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Jhalaria M, Buenning E, Huang Y, Tyagi M, Zorn R, Zamponi M, García-Sakai V, Jestin J, Benicewicz BC, Kumar SK. Accelerated Local Dynamics in Matrix-Free Polymer Grafted Nanoparticles. Phys Rev Lett 2019; 123:158003. [PMID: 31702322 DOI: 10.1103/physrevlett.123.158003] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 07/26/2019] [Indexed: 06/10/2023]
Abstract
The tracer diffusion coefficient of six different permanent gases in polymer-grafted nanoparticle (GNP) membranes, i.e., neat GNP constructs with no solvent, show a maximum as a function of the grafted chain length at fixed grafting density. This trend is reproduced for two different NP sizes and three different polymer chemistries. We postulate that nonmonotonic changes in local, segmental friction as a function of graft chain length (at fixed grafting density) must underpin these effects, and use quasielastic neutron scattering to probe the self-motions of polymer chains at the relevant segmental scale (i.e., sampling local friction or viscosity). These data, when interpreted with a jump diffusion model, show that, in addition to the speeding-up in local chain dynamics, the elementary distance over which segments hop is strongly dependent on graft chain length. We therefore conclude that transport modifications in these GNP layers, which are underpinned by a structural transition from a concentrated brush to semidilute polymer brush, are a consequence of both spatial and temporal changes, both of which are likely driven by the lower polymer densities of the GNPs relative to the neat polymer.
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Affiliation(s)
- Mayank Jhalaria
- Department of Chemical Engineering, Columbia University, New York, New York 10027, USA
| | - Eileen Buenning
- Department of Chemical Engineering, Columbia University, New York, New York 10027, USA
| | - Yucheng Huang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29201, USA
| | - Madhusudan Tyagi
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102, USA
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, USA
| | - Reiner Zorn
- Jülich Centre for Neutron Science (JCNS-1) and Institute for Complex Systems (ICS-1), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Michaela Zamponi
- Jülich Centre for Neutron Science at MLZ, Forschungszentrum Jülich GmbH, Lichtenbergstrasse 1, 85748 Garching, Germany
| | - Victoria García-Sakai
- ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Chilton, Oxfordshire OX11 0QX, United Kingdom
| | - Jacques Jestin
- CEA Saclay, Laboratoire Léon Brillouin, F-91191 Gif Sur Yvette, France
| | - Brian C Benicewicz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29201, USA
| | - Sanat K Kumar
- Department of Chemical Engineering, Columbia University, New York, New York 10027, USA
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18
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Abbas ZM, Tawfilas M, Khani MM, Golian K, Marsh ZM, Jhalaria M, Simonutti R, Stefik M, Kumar SK, Benicewicz BC. Reinforcement of polychloroprene by grafted silica nanoparticles. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.03.031] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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19
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Bilchak CR, Huang Y, Benicewicz BC, Durning CJ, Kumar SK. High-Frequency Mechanical Behavior of Pure Polymer-Grafted Nanoparticle Constructs. ACS Macro Lett 2019; 8:294-298. [PMID: 35650831 DOI: 10.1021/acsmacrolett.8b00981] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Polymer-grafted nanoparticle (GNP) membranes show increased gas permeability relative to pure polymer analogs, with this effect evidently tunable through systematic variations in the grafted polymer chain length and grafting density. Additionally, these materials show less deleterious aging effects relative to the pure polymer. To better understand these issues, we explore the solid-state mechanical properties of GNP layers using quartz crystal microbalance (QCM) spectroscopy, which operates under conditions (≈5 MHz) that we believe are relevant to gas transport. The GNP's high-frequency storage moduli exhibit a characteristic increase with increasing nanoparticle (NP) core loading, consistent with past work on the reinforcement of polymers physically well mixed with bare NPs. However, these GNPs show a substantial, nonmonotonic decrease in loss as a function of chain length (at fixed grafting density), with the loss minimum corresponding to the chain length with the maximum gas permeability. We speculate that this feature corresponds to a dynamical transition, where the GNP membranes go from a jammed solid (colloid-like) to liquid-like (polymer-controlled) behavior with increasing chain length.
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Affiliation(s)
- Connor R. Bilchak
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Yucheng Huang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29201, United States
| | - Brian C. Benicewicz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29201, United States
| | - Christopher J Durning
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Sanat K. Kumar
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
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20
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Buenning E, Jestin J, Huang Y, Benicewicz BC, Durning CJ, Kumar SK. Location of Imbibed Solvent in Polymer-Grafted Nanoparticle Membranes. ACS Macro Lett 2018; 7:1051-1055. [PMID: 35632947 DOI: 10.1021/acsmacrolett.8b00472] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Membranes made purely from nanoparticles (NPs) grafted with polymer chains show increased gas permeability relative to the analogous neat polymer films, with this effect apparently being tunable with systematic variations in polymer graft density and molecular weight. To explore the structural origins of these unusual transport results, we use small angle scattering (neutron, X-ray) on the dry nanocomposite film and to critically examine in situ the structural effects of absorbed solvent. The relatively low diffusion coefficients of typical solvents (∼10-12 m2/s) restricts us to thin films (≈1 μm in thickness) if solute concentration profiles are to equilibrate on the 1 s time scale. The use of such thin films, however, renders them as weak scatterers. Inspired by our nearly two decades old previous work, we address these conflicting requirements through the use of a custom designed flow cell, where stacks of 10 individual ≈1 μm thick supported films are used, while ensuring that each film is individually exposed to solvent vapor. By using isotopically labeled solvents, we study the solvent distribution within the film and show surprisingly that the solvent homogeneously swells the polymer under all conditions that we examined. These results are not anticipated by current theories, but they suggest that, at least under some conditions, the free volume increases due to the grafting of chains to nanoparticles is apparently distributed isotropically in these materials.
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Affiliation(s)
- Eileen Buenning
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Jacques Jestin
- CEA Saclay, Lab Léon Brillouin, F-91191 Gif Sur Yvette, France
| | - Yucheng Huang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29201, United States
| | - Brian C. Benicewicz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29201, United States
| | - Christopher J. Durning
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Sanat K. Kumar
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
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21
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Gokhale R, Asset T, Qian G, Serov A, Artyushkova K, Benicewicz BC, Atanassov P. Implementing PGM-free electrocatalysts in high-temperature polymer electrolyte membrane fuel cells. Electrochem commun 2018. [DOI: 10.1016/j.elecom.2018.06.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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22
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Pribyl J, Taylor-Pashow KML, Shehee TC, Benicewicz BC. High-Capacity Poly(4-vinylpyridine) Grafted PolyHIPE Foams for Efficient Plutonium Separation and Purification. ACS Omega 2018; 3:8181-8189. [PMID: 31458955 PMCID: PMC6644451 DOI: 10.1021/acsomega.8b01057] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 07/11/2018] [Indexed: 05/22/2023]
Abstract
The use of anion-exchange resins to separate and purify plutonium from various sources represents a major bottleneck in the throughput that can be achieved when this step is part of a larger separation scheme. Slow sorption kinetics and broad elution profiles necessitate long contact times with the resin, and the recovered Pu is relatively dilute, requiring the handling of large volumes of hazardous material. In this work, high internal-phase emulsion (HIPE) foams were prepared with a comonomer containing a dormant nitroxide. Using surface-initiated nitroxide-mediated polymerization, the foam surface was decorated with a brush of poly(4-vinylpyridine), and the resulting materials were tested under controlled flow conditions as anion-exchange media for plutonium separations. It was found that the grafted foams demonstrated greater ion-exchange capacity per unit volume than a commercial resin commonly used for Pu separations and had narrower elution profiles. The ion-exchange sites (quaternized pyridine) were exposed on the surface of the large pores of the foam, resulting in convective mass transfer, the driving force for the excellent separation properties exhibited by the synthesized polyHIPE foams.
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Affiliation(s)
- Julia
G. Pribyl
- Department
of Chemistry and Biochemistry, University
of South Carolina, 541 Main Street, Horizon I Building, Columbia, South Carolina 29208, United States
| | - Kathryn M. L. Taylor-Pashow
- Environmental
Stewardship, Savannah River National Laboratory, Savannah River Site, Building 773-A, Aiken, South Carolina 29808, United States
| | - Thomas C. Shehee
- Environmental
Stewardship, Savannah River National Laboratory, Savannah River Site, Building 773-A, Aiken, South Carolina 29808, United States
| | - Brian C. Benicewicz
- Department
of Chemistry and Biochemistry, University
of South Carolina, 541 Main Street, Horizon I Building, Columbia, South Carolina 29208, United States
- E-mail:
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23
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Pageni P, Yang P, Chen YP, Huang Y, Bam M, Zhu T, Nagarkatti M, Benicewicz BC, Decho AW, Tang C. Charged Metallopolymer-Grafted Silica Nanoparticles for Antimicrobial Applications. Biomacromolecules 2018; 19:417-425. [PMID: 29384661 PMCID: PMC5971106 DOI: 10.1021/acs.biomac.7b01510] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Inappropriate and frequent use of antibiotics has led to the development of antibiotic-resistant bacteria, which cause infectious diseases that are difficult to treat. With the rising threat of antibiotic resistance, the need to develop effective new antimicrobial agents is prominent. We report antimicrobial metallopolymer nanoparticles, which were prepared by surface-initiated reversible addition-fragmentation chain transfer polymerization of a cobaltocenium-containing methacrylate monomer from silica nanoparticles. These particles are capable of forming a complex with β-lactam antibiotics, such as penicillin, rejuvenating the bactericidal activity of the antibiotic. Disk diffusion assays showed significantly increased antibacterial activities against both Gram-positive and Gram-negative bacteria. The improved efficiencies were attributed to the inhibition of hydrolysis of the β-lactam antibiotics and enhancement of local antibiotics concentration on a nanoparticle surface. In addition, hemolysis evaluations demonstrated minimal toxicity to red blood cells.
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Affiliation(s)
- Parasmani Pageni
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Peng Yang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Yung Pin Chen
- Department of Environmental Health Sciences, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Yucheng Huang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Marpe Bam
- Department of Pathology, Microbiology and Immunology, University of South Carolina, School of Medicine, Columbia, South Carolina 29209, United States
| | - Tianyu Zhu
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Mitzi Nagarkatti
- Department of Pathology, Microbiology and Immunology, University of South Carolina, School of Medicine, Columbia, South Carolina 29209, United States
| | - Brian C. Benicewicz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Alan W. Decho
- Department of Environmental Health Sciences, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Chuanbing Tang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
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24
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Zheng Y, Abbas ZM, Sarkar A, Marsh Z, Stefik M, Benicewicz BC. Surface-initiated reversible addition-fragmentation chain transfer polymerization of chloroprene and mechanical properties of matrix-free polychloroprene nanocomposites. POLYMER 2018. [DOI: 10.1016/j.polymer.2017.12.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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25
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Bilchak CR, Buenning E, Asai M, Zhang K, Durning CJ, Kumar SK, Huang Y, Benicewicz BC, Gidley DW, Cheng S, Sokolov AP, Minelli M, Doghieri F. Polymer-Grafted Nanoparticle Membranes with Controllable Free Volume. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01428] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Connor R. Bilchak
- Department
of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Eileen Buenning
- Department
of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Makoto Asai
- Department
of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Kai Zhang
- Department
of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Christopher J. Durning
- Department
of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Sanat K. Kumar
- Department
of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Yucheng Huang
- Department
of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Brian C. Benicewicz
- Department
of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - David W. Gidley
- Department
of Physics, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Shiwang Cheng
- Chemical
Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Alexei P. Sokolov
- Chemical
Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Matteo Minelli
- Department
of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, 40126 Bologna, Italy
| | - Ferruccio Doghieri
- Department
of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, 40126 Bologna, Italy
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26
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Zheng Y, Huang Y, Benicewicz BC. A Useful Method for Preparing Mixed Brush Polymer Grafted Nanoparticles by Polymerizing Block Copolymers from Surfaces with Reversed Monomer Addition Sequence. Macromol Rapid Commun 2017; 38. [PMID: 28804973 DOI: 10.1002/marc.201700300] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 07/12/2017] [Indexed: 11/05/2022]
Abstract
The preparation of well-defined block copolymers using controlled radical polymerization depends on the proper order of monomer addition. The reversed order of monomer addition results in a mixture of block copolymer and homopolymer and thus has typically been avoided. In this paper, the low blocking efficiency of reversed monomer addition order is utilized in combination with surface initiated reversible addition-fragmentation chain-transfer polymerization to establish a facile procedure toward mixed polymer brush grafted nanoparticles SiO2 -g-(PS (polystyrene), PS-b-PMAA (polymethacrylic acid)). The SiO2 -g-(PS, PS-b-PMAA) nanoparticles are analyzed by gel permeation chromatography deconvolution, and the fraction of each polymer component is calculated. Additionally, the SiO2 -g-(PS, PS-b-PMAA) are amphiphilic in nature and show unique self-assembly behavior in water.
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Affiliation(s)
- Yang Zheng
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208, USA
| | - Yucheng Huang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208, USA
| | - Brian C Benicewicz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208, USA
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27
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Zheng Y, Wang L, Lu L, Wang Q, Benicewicz BC. pH and Thermal Dual-Responsive Nanoparticles for Controlled Drug Delivery with High Loading Content. ACS Omega 2017; 2:3399-3405. [PMID: 30023694 PMCID: PMC6044946 DOI: 10.1021/acsomega.7b00367] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 06/28/2017] [Indexed: 05/21/2023]
Abstract
A pH and thermal dual-responsive nanocarrier with silica as the core and block copolymer composed of poly(methacrylic acid) (PMAA) and poly(N-isopropylacrylamide) (PNIPAM) as the shell was prepared by surface-initiated reversible addition-fragmentation chain-transfer (SI-RAFT) polymerization. The resulting SiO2-PMAA-b-PNIPAM particles dispersed individually in an aqueous solution at a high pH and a low temperature but reversibly agglomerated under acidic conditions or at elevated temperatures. These dual-responsive nanoparticles were used as carriers to deliver the model drug doxorubicin (DOX) with unusually high entrapment efficiency and loading content, which is due to the small size (15 nm), light weight of the cores, and high graft density (0.619 chains/nm2) achieved by SI-RAFT polymerization. The release rate was controlled by both the pH and temperature of the surrounding medium. Moreover, these particles selectively precipitated at acidic conditions with increased temperature, which may enhance their ability to accumulate at tumor sites. Cytotoxicity studies demonstrated that DOX-loaded nanoparticles are highly active against Hela cells and more effective than free DOX of an equivalent dose. A cellular uptake study revealed that SiO2-PMAA-b-PNIPAM nanoparticles could successfully deliver DOX molecules into the nuclei of Hela cells. All these features indicated that SiO2-PMAA-b-PNIPAM nanoparticles are a promising candidate for therapeutic applications.
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Affiliation(s)
- Yang Zheng
- Department of Chemistry and
Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Lei Wang
- Department of Chemistry and
Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Lin Lu
- Department of Chemistry and
Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Qian Wang
- Department of Chemistry and
Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Brian C. Benicewicz
- Department of Chemistry and
Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
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28
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Zhao D, Gimenez-Pinto V, Jimenez AM, Zhao L, Jestin J, Kumar SK, Kuei B, Gomez ED, Prasad AS, Schadler LS, Khani MM, Benicewicz BC. Tunable Multiscale Nanoparticle Ordering by Polymer Crystallization. ACS Cent Sci 2017; 3:751-758. [PMID: 28776017 PMCID: PMC5532707 DOI: 10.1021/acscentsci.7b00157] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Indexed: 05/17/2023]
Abstract
While ∼75% of commercially utilized polymers are semicrystalline, the generally low mechanical modulus of these materials, especially for those possessing a glass transition temperature below room temperature, restricts their use for structural applications. Our focus in this paper is to address this deficiency through the controlled, multiscale assembly of nanoparticles (NPs), in particular by leveraging the kinetics of polymer crystallization. This process yields a multiscale NP structure that is templated by the lamellar semicrystalline polymer morphology and spans NPs engulfed by the growing crystals, NPs ordered into layers in the interlamellar zone [spacing of [Formula: see text] (10-100 nm)], and NPs assembled into fractal objects at the interfibrillar scale, [Formula: see text] (1-10 μm). The relative fraction of NPs in this hierarchy is readily manipulated by the crystallization speed. Adding NPs usually increases the Young's modulus of the polymer, but the effects of multiscale ordering are nearly an order of magnitude larger than those for a state where the NPs are not ordered, i.e., randomly dispersed in the matrix. Since the material's fracture toughness remains practically unaffected in this process, this assembly strategy allows us to create high modulus materials that retain the attractive high toughness and low density of polymers.
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Affiliation(s)
- Dan Zhao
- Department
of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Vianney Gimenez-Pinto
- Department
of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Andrew M. Jimenez
- Department
of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Longxi Zhao
- Department
of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Jacques Jestin
- Department
of Chemical Engineering, Columbia University, New York, New York 10027, United States
- Laboratoire
Léon Brillouin, CEA Saclay, 91191 Gif-sur-Yvette
Cedex, France
- E-mail: ;
| | - Sanat K. Kumar
- Department
of Chemical Engineering, Columbia University, New York, New York 10027, United States
- E-mail:
| | - Brooke Kuei
- Department
of Chemical Engineering, Pennsylvania State
University, University Park, Pennsylvania 16802, United States
| | - Enrique D. Gomez
- Department
of Chemical Engineering, Pennsylvania State
University, University Park, Pennsylvania 16802, United States
| | - Aditya Shanker Prasad
- Department
of Materials Science and Engineering, Rensselaer
Polytechnic Institute, Troy, New York 12180, United States
| | - Linda S. Schadler
- Department
of Materials Science and Engineering, Rensselaer
Polytechnic Institute, Troy, New York 12180, United States
| | - Mohammad M. Khani
- Department
of Chemistry and Biochemistry, University
of South Carolina, Columbia, South Carolina 29208, United States
| | - Brian C. Benicewicz
- Department
of Chemistry and Biochemistry, University
of South Carolina, Columbia, South Carolina 29208, United States
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29
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Affiliation(s)
- Yucheng Huang
- Department of Chemistry and
Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Yang Zheng
- Department of Chemistry and
Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Amrita Sarkar
- Department of Chemistry and
Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Yanmei Xu
- Department of Chemistry and
Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Morgan Stefik
- Department of Chemistry and
Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Brian C. Benicewicz
- Department of Chemistry and
Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
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30
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Schönberger F, Qian G, Benicewicz BC. Polybenzimidazole-based block copolymers: From monomers to membrane electrode assemblies for high temperature polymer electrolyte membrane fuel cells. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/pola.28530] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Frank Schönberger
- Plastics Division; Fraunhofer Institute for Structural Durability and System Reliability LBF; Schlossgartenstraße 6 Darmstadt 64289 Germany
- Department of Chemistry and Biochemistry; University of South Carolina; 541 Main Street, Horizon I Bldg Columbia South Carolina 29208
| | - Guoqing Qian
- Department of Chemistry and Biochemistry; University of South Carolina; 541 Main Street, Horizon I Bldg Columbia South Carolina 29208
| | - Brian C. Benicewicz
- Department of Chemistry and Biochemistry; University of South Carolina; 541 Main Street, Horizon I Bldg Columbia South Carolina 29208
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31
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Affiliation(s)
- Mohammad M. Khani
- Department of Chemistry and Biochemistry; University of South Carolina; Columbia South Carolina 29208
| | - Zaid M. Abbas
- Department of Chemistry and Biochemistry; University of South Carolina; Columbia South Carolina 29208
| | - Brian C. Benicewicz
- Department of Chemistry and Biochemistry; University of South Carolina; Columbia South Carolina 29208
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32
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Affiliation(s)
- Sanat K. Kumar
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Brian C. Benicewicz
- Department of Chemistry and
Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Richard A. Vaia
- Materials and Manufacturing
Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, United States
| | - Karen I. Winey
- Department of Materials Science
and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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33
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34
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Zheng Y, Huang Y, Abbas ZM, Benicewicz BC. One-pot synthesis of inorganic nanoparticle vesicles via surface-initiated polymerization-induced self-assembly. Polym Chem 2017. [DOI: 10.1039/c6py01956k] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The first case of surface-initiated polymerization-induced self-assembly (SI-PISA) of inorganic nanoparticles (NPs) into single-walled vesicles is reported.
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Affiliation(s)
- Yang Zheng
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
| | - Yucheng Huang
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
| | - Zaid M. Abbas
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
| | - Brian C. Benicewicz
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
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35
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Zhao D, Di Nicola M, Khani MM, Jestin J, Benicewicz BC, Kumar SK. Role of block copolymer adsorption versus bimodal grafting on nanoparticle self-assembly in polymer nanocomposites. Soft Matter 2016; 12:7241-7247. [PMID: 27502154 DOI: 10.1039/c6sm01396a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We compare the self-assembly of silica nanoparticles (NPs) with physically adsorbed polystyrene-block-poly(2-vinylpyridine) (PS-b-P2VP) copolymers (BCP) against NPs with grafted bimodal (BM) brushes comprised of long, sparsely grafted PS chains and a short dense carpet of P2VP chains. As with grafted NPs, the dispersion state of the BCP NPs can be facilely tuned in PS matrices by varying the PS coverage on the NP surface or by changes in the ratio of the PS graft to matrix chain lengths. Surprisingly, the BCP NPs are remarkably better dispersed than the NPs tethered with bimodal brushes at comparable PS grafting densities. We postulate that this difference arises because of two factors inherent in the synthesis of the NPs: In the case of the BCP NPs the adsorption process is analogous to the chains being "grafted to" the NP surface, while the BM case corresponds to "grafting from" the surface. We have shown that the "grafted from" protocol yields patchy NPs even if the graft points are uniformly placed on each particle. This phenomenon, which is caused by chain conformation fluctuations, is exacerbated by the distribution function associated with the (small) number of grafts per particle. In contrast, in the case of BCP adsorption, each NP is more uniformly coated by a P2VP monolayer driven by the strongly favorable P2VP-silica interactions. Since each P2VP block is connected to a PS chain we conjecture that these adsorbed systems are closer to the limit of spatially uniform sparse brush coverage than the chemically grafted case. We finally show that the better NP dispersion resulting from BCP adsorption leads to larger mechanical reinforcement than those achieved with BM particles. These results emphasize that physical adsorption of BCPs is a simple, effective and practically promising strategy to direct NP dispersion in a chemically unfavorable polymer matrix.
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Affiliation(s)
- Dan Zhao
- Department of Chemical Engineering, Columbia University, 500 West 120th Street, New York, New York 10027, USA.
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36
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Krentz T, Khani MM, Bell M, Benicewicz BC, Nelson JK, Zhao S, Hillborg H, Schadler LS. Morphologically dependent alternating-current and direct-current breakdown strength in silica-polypropylene nanocomposites. J Appl Polym Sci 2016. [DOI: 10.1002/app.44347] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Timothy Krentz
- Department of Materials Science and Engineering; Rensselaer Polytechnic Institute; 110 8th Street MRC 140 Troy New York 12180
| | - Mohammad M. Khani
- Department of Chemistry and Biochemistry; University of South Carolina; 541 Main Street, Horizon I Room 232 Columbia South Carolina 29208
| | - Michael Bell
- Department of Chemistry and Biochemistry; University of South Carolina; 541 Main Street, Horizon I Room 232 Columbia South Carolina 29208
| | - Brian C. Benicewicz
- Department of Chemistry and Biochemistry; University of South Carolina; 541 Main Street, Horizon I Room 232 Columbia South Carolina 29208
| | - J. Keith Nelson
- Department of Materials Science and Engineering; Rensselaer Polytechnic Institute; 110 8th Street MRC 140 Troy New York 12180
| | - Su Zhao
- Power Devices, Corporate Research, ABB AB; Forskargränd 7 Västerås 721 78 Sweden
| | - Henrik Hillborg
- Power Devices, Corporate Research, ABB AB; Forskargränd 7 Västerås 721 78 Sweden
| | - Linda S. Schadler
- Department of Materials Science and Engineering; Rensselaer Polytechnic Institute; 110 8th Street MRC 140 Troy New York 12180
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37
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Shen Y, Roberge A, Tan R, Gee MY, Gary DC, Huang Y, Blom DA, Benicewicz BC, Cossairt BM, Greytak AB. Gel permeation chromatography as a multifunctional processor for nanocrystal purification and on-column ligand exchange chemistry. Chem Sci 2016; 7:5671-5679. [PMID: 30034705 PMCID: PMC6022040 DOI: 10.1039/c6sc01301e] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 05/20/2016] [Indexed: 01/31/2023] Open
Abstract
This article illustrates the use of gel permeation chromatography (GPC, organic-phase size exclusion chromatography) to separate nanocrystals from weakly-bound small molecules, including solvent, on the basis of size. A variety of colloidal inorganic nanocrystals of different size, shape, composition, and surface termination are shown to yield purified samples with greatly reduced impurity concentrations. Additionally, the method is shown to be useful in achieving a change of solvent without requiring precipitation of the nanocrystals. By taking advantage of the different rates at which small molecules and nanoparticles travel through the column, we show that it is furthermore possible to use the GPC column as a multi-functional flow reactor that can accomplish in sequence the steps of initial purification, ligand exchange with controlled reactant concentration and interaction time, and subsequent cleanup without requiring a change of phase. This example of process intensification via GPC is shown to yield nearly complete displacement of the initial surface ligand population upon reaction with small molecule and macromolecular reactants to form ligand-exchanged nanocrystal products.
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Affiliation(s)
- Yi Shen
- Department of Chemistry and Biochemistry , University of South Carolina , Columbia , SC 29208 , USA .
| | - Adam Roberge
- Department of Chemistry and Biochemistry , University of South Carolina , Columbia , SC 29208 , USA .
| | - Rui Tan
- Department of Chemistry and Biochemistry , University of South Carolina , Columbia , SC 29208 , USA .
| | - Megan Y Gee
- Department of Chemistry and Biochemistry , University of South Carolina , Columbia , SC 29208 , USA .
| | - Dylan C Gary
- Department of Chemistry , University of Washington , Seattle , WA 98195 , USA
| | - Yucheng Huang
- Department of Chemistry and Biochemistry , University of South Carolina , Columbia , SC 29208 , USA .
| | - Douglas A Blom
- USC Nanocenter , University of South Carolina , Columbia , SC 29208 , USA
| | - Brian C Benicewicz
- Department of Chemistry and Biochemistry , University of South Carolina , Columbia , SC 29208 , USA .
- USC Nanocenter , University of South Carolina , Columbia , SC 29208 , USA
| | - Brandi M Cossairt
- Department of Chemistry , University of Washington , Seattle , WA 98195 , USA
| | - Andrew B Greytak
- Department of Chemistry and Biochemistry , University of South Carolina , Columbia , SC 29208 , USA .
- USC Nanocenter , University of South Carolina , Columbia , SC 29208 , USA
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38
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Affiliation(s)
- Brian C. Benicewicz
- Los Alamos National Laboratory Los Alamos, New Mexico 87544, Lukens Corporation Albuquerque, New Mexico
| | - Phillip K. Hopper
- Los Alamos National Laboratory Los Alamos, New Mexico 87544, Lukens Corporation Albuquerque, New Mexico
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39
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40
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Zhao D, Di Nicola M, Khani MM, Jestin J, Benicewicz BC, Kumar SK. Self-Assembly of Monodisperse versus Bidisperse Polymer-Grafted Nanoparticles. ACS Macro Lett 2016; 5:790-795. [PMID: 35614768 DOI: 10.1021/acsmacrolett.6b00349] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We systematically compare the dispersion and self-assembly of silica nanoparticles (NPs) grafted with either a sparse monomodal long chain length polystyrene (PS) brush or a bimodal brush comprised of a sparse grafting of long PS chains and a dense carpet of short poly(2-vinylpyridine) (P2VP) chains. These two different types of NPs are placed in pure PS matrices of varying molecular weights in a series of experiments. We first show that NP dispersion is generally improved in the case of bimodal brushes. More interestingly, at low PS grafting densities the bimodal brushes give different self-assembled structures relative to the monomodal brushes; we conjecture that the presence of the short P2VP chains in the bimodal brush reduces the effective core-core attractions and thus allows these bidisperse NPs to display self-assembly behavior that is less likely to be kinetically trapped by the strong intercore attractions that control the behavior of monomodal NPs. In this low PS grafting density limit, where we expect the spatial coverage of the brush to be the most nonuniform, we find the formation of "vesicular" structures that are representative of highly asymmetric ("tadpole") surfactants. Our results therefore show that reducing the inter-NP attractions gives rise to a much richer ensemble of NP self-assemblies, apparently with a smaller influence from kinetic traps (or barriers).
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Affiliation(s)
- Dan Zhao
- Department
of Chemical Engineering, Columbia University, 500 West 120th Street, New York, New York 10027, United States
| | - Matteo Di Nicola
- School
of Science and Technology, Università di Camerino, Via Sant’Agostino
1, 62032, Camerino, Italy
| | - Mohammad M. Khani
- Department
of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Jacques Jestin
- Department
of Chemical Engineering, Columbia University, 500 West 120th Street, New York, New York 10027, United States
- Laboratoire
Léon Brillouin, CEA Saclay, 91191 Gif-sur-Yvette
Cedex, France
| | - Brian C. Benicewicz
- Department
of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Sanat K. Kumar
- Department
of Chemical Engineering, Columbia University, 500 West 120th Street, New York, New York 10027, United States
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41
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Zhao X, Shen Y, Adogla EA, Viswanath A, Tan R, Benicewicz BC, Greytak AB, Lin Y, Wang Q. Surface labeling of enveloped virus with polymeric imidazole ligand-capped quantum dots via the metabolic incorporation of phospholipids into host cells. J Mater Chem B 2016; 4:2421-2427. [PMID: 32263192 DOI: 10.1039/c6tb00263c] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We report a general method for the preparation of quantum dot-labeled viruses through a strain-promoted azide-alkyne cycloaddition (SPAAC) reaction. The quantum dot sample was functionalized with methacrylate-based polymeric imidazole ligands (MA-PILs) bearing dibenzocyclooctyne groups. Enveloped measles virus was labeled with azide groups through the metabolic incorporation of a choline analogue into the host cell membrane, and then linked with the modified QDs. The virus retained its infectious ability against host cells after the modification with MA-PIL capped QDs.
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Affiliation(s)
- Xia Zhao
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
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42
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Affiliation(s)
- Kayley J. Fishel
- Department of Chemistry and Biochemistry; University of South Carolina; Columbia South Carolina 29208
| | - Alexander L. Gulledge
- Department of Chemistry and Biochemistry; University of South Carolina; Columbia South Carolina 29208
| | - Andrew T. Pingitore
- Department of Chemistry and Biochemistry; University of South Carolina; Columbia South Carolina 29208
| | - Jason P. Hoffman
- Department of Chemistry and Biochemistry; University of South Carolina; Columbia South Carolina 29208
| | - Warren P. Steckle
- Department of Chemistry and Biochemistry; University of South Carolina; Columbia South Carolina 29208
| | - Brian C. Benicewicz
- Department of Chemistry and Biochemistry; University of South Carolina; Columbia South Carolina 29208
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43
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Zheng Y, Huang Y, Abbas ZM, Benicewicz BC. Surface-initiated polymerization-induced self-assembly of bimodal polymer-grafted silica nanoparticles towards hybrid assemblies in one step. Polym Chem 2016. [DOI: 10.1039/c6py01319h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The first case of surface-initiated polymerization-induced self-assembly (SI-PISA) by polymerizing benzyl methacrylate from SiO2-g-(PHEMA, CPDB) in methanol is reported.
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Affiliation(s)
- Yang Zheng
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
| | - Yucheng Huang
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
| | - Zaid M. Abbas
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
| | - Brian C. Benicewicz
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
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44
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Qiao Y, Yin X, Wang L, Islam MS, Benicewicz BC, Ploehn HJ, Tang C. Bimodal Polymer Brush Core–Shell Barium Titanate Nanoparticles: A Strategy for High-Permittivity Polymer Nanocomposites. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b02018] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Yali Qiao
- Department of Chemistry and Biochemistry and ‡Department of
Chemical Engineering, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Xiaodong Yin
- Department of Chemistry and Biochemistry and ‡Department of
Chemical Engineering, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Lei Wang
- Department of Chemistry and Biochemistry and ‡Department of
Chemical Engineering, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Md. Sayful Islam
- Department of Chemistry and Biochemistry and ‡Department of
Chemical Engineering, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Brian C. Benicewicz
- Department of Chemistry and Biochemistry and ‡Department of
Chemical Engineering, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Harry J. Ploehn
- Department of Chemistry and Biochemistry and ‡Department of
Chemical Engineering, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Chuanbing Tang
- Department of Chemistry and Biochemistry and ‡Department of
Chemical Engineering, University of South Carolina, Columbia, South Carolina 29208, United States
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45
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Chen X, Qian G, Molleo MA, Benicewicz BC, Ploehn HJ. High temperature creep behavior of phosphoric acid-polybenzimidazole gel membranes. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/polb.23791] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xiaoming Chen
- Department of Chemical Engineering; University of South Carolina; Columbia South Carolina 29208
| | - Guoqing Qian
- Department of Chemistry & Biochemistry; University of South Carolina; Columbia South Carolina 29208
| | - Max A. Molleo
- Department of Chemistry & Biochemistry; University of South Carolina; Columbia South Carolina 29208
| | - Brian C. Benicewicz
- Department of Chemistry & Biochemistry; University of South Carolina; Columbia South Carolina 29208
| | - Harry J. Ploehn
- Department of Chemical Engineering; University of South Carolina; Columbia South Carolina 29208
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46
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Johnson CM, Pate KM, Shen Y, Viswanath A, Tan R, Benicewicz BC, Moss MA, Greytak AB. A methacrylate-based polymeric imidazole ligand yields quantum dots with low cytotoxicity and low nonspecific binding. J Colloid Interface Sci 2015; 458:310-4. [PMID: 26247382 DOI: 10.1016/j.jcis.2015.07.069] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Revised: 07/28/2015] [Accepted: 07/30/2015] [Indexed: 10/23/2022]
Abstract
This paper assesses the biocompatibility for fluorescence imaging of colloidal nanocrystal quantum dots (QDs) coated with a recently-developed multiply-binding methacrylate-based polymeric imidazole ligand. The QD samples were purified prior to ligand exchange via a highly repeatable gel permeation chromatography (GPC) method. A multi-well plate based protocol was used to characterize nonspecific binding and toxicity of the QDs toward human endothelial cells. Nonspecific binding in 1% fetal bovine serum was negligible compared to anionically-stabilized QD controls, and no significant toxicity was detected on 24h exposure. The nonspecific binding results were confirmed by fluorescence microscopy. This study is the first evaluation of biocompatibility in QDs initially purified by GPC and represents a scalable approach to comparison among nanocrystal-based bioimaging scaffolds.
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Affiliation(s)
- Colin M Johnson
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208, United States
| | - Kayla M Pate
- Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, United States
| | - Yi Shen
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208, United States
| | - Anand Viswanath
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208, United States
| | - Rui Tan
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208, United States
| | - Brian C Benicewicz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208, United States; USC Nanocenter, University of South Carolina, Columbia, SC 29208, United States
| | - Melissa A Moss
- Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, United States; Biomedical Engineering Program, University of South Carolina, Columbia, SC 29208, United States
| | - Andrew B Greytak
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208, United States; USC Nanocenter, University of South Carolina, Columbia, SC 29208, United States.
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Miller KP, Wang L, Chen YP, Pellechia PJ, Benicewicz BC, Decho AW. Engineering nanoparticles to silence bacterial communication. Front Microbiol 2015; 6:189. [PMID: 25806030 PMCID: PMC4354405 DOI: 10.3389/fmicb.2015.00189] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 02/20/2015] [Indexed: 02/05/2023] Open
Abstract
The alarming spread of bacterial resistance to traditional antibiotics has warranted the study of alternative antimicrobial agents. Quorum sensing (QS) is a chemical cell-to-cell communication mechanism utilized by bacteria to coordinate group behaviors and establish infections. QS is integral to bacterial survival, and therefore provides a unique target for antimicrobial therapy. In this study, silicon dioxide nanoparticles (Si-NP) were engineered to target the signaling molecules [i.e., acylhomoserine lactones (HSLs)] used for QS in order to halt bacterial communication. Specifically, when Si-NP were surface functionalized with β-cyclodextrin (β-CD), then added to cultures of bacteria (Vibrio fischeri), whose luminous output depends upon HSL-mediated QS, the cell-to-cell communication was dramatically reduced. Reductions in luminescence were further verified by quantitative polymerase chain reaction (qPCR) analyses of luminescence genes. Binding of HSLs to Si-NPs was examined using nuclear magnetic resonance (NMR) spectroscopy. The results indicated that by delivering high concentrations of engineered NPs with associated quenching compounds, the chemical signals were removed from the immediate bacterial environment. In actively-metabolizing cultures, this treatment blocked the ability of bacteria to communicate and regulate QS, effectively silencing and isolating the cells. Si-NPs provide a scaffold and critical stepping-stone for more pointed developments in antimicrobial therapy, especially with regard to QS-a target that will reduce resistance pressures imposed by traditional antibiotics.
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Affiliation(s)
- Kristen P Miller
- Microbial Interactions Laboratory, Department of Environmental Health Sciences, Public Health Research Center, Arnold School of Public Health, University of South Carolina Columbia, SC, USA
| | - Lei Wang
- Department of Chemistry and Biochemistry, JM Palms Center for Graduate Student Research, University of South Carolina Columbia, SC, USA
| | - Yung-Pin Chen
- Microbial Interactions Laboratory, Department of Environmental Health Sciences, Public Health Research Center, Arnold School of Public Health, University of South Carolina Columbia, SC, USA
| | - Perry J Pellechia
- Department of Chemistry and Biochemistry, JM Palms Center for Graduate Student Research, University of South Carolina Columbia, SC, USA
| | - Brian C Benicewicz
- Department of Chemistry and Biochemistry, JM Palms Center for Graduate Student Research, University of South Carolina Columbia, SC, USA
| | - Alan W Decho
- Microbial Interactions Laboratory, Department of Environmental Health Sciences, Public Health Research Center, Arnold School of Public Health, University of South Carolina Columbia, SC, USA
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Abstract
“Matrix-free” nanocomposites with a bimodal population of polymer brushes for optimizing filler loading while maintaining controlled dispersion.
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Affiliation(s)
- Ying Li
- Department of Materials Science and Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
| | - Lei Wang
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
| | - Bharath Natarajan
- Department of Materials Science and Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
| | - Peng Tao
- Department of Materials Science and Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
- State Key Laboratory of Metal Matrix Composites
| | - Brian C. Benicewicz
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
| | - Chaitanya Ullal
- Department of Materials Science and Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
| | - Linda S. Schadler
- Department of Materials Science and Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
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49
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Abstract
Antibiotics delivered to bacteria using engineered nanoparticles (NP), offer a powerful and efficient means to kill or control bacteria, especially those already resistant to antibiotics.
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Affiliation(s)
- Kristen P. Miller
- Department of Environmental Health Sciences
- Arnold School of Public Health
- University of South Carolina
- Columbia
- USA
| | - Lei Wang
- Department of Chemistry and Biochemistry
- College of Arts and Sciences
- University of South Carolina
- Columbia
- USA
| | - Brian C. Benicewicz
- Department of Chemistry and Biochemistry
- College of Arts and Sciences
- University of South Carolina
- Columbia
- USA
| | - Alan W. Decho
- Department of Environmental Health Sciences
- Arnold School of Public Health
- University of South Carolina
- Columbia
- USA
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50
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Viswanath A, Paudel P, Kittikhunnatham P, Green AN, Greytak AB, Benicewicz BC. Synthesis of random terpolymers bearing multidentate imidazole units and their use in functionalization of cadmium sulfide nanowires. Polym Chem 2015. [DOI: 10.1039/c5py00685f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work reports on a new synthesis method for random ternary copolymers that are shown to tether a molecular dye payload to cadmium sulfide nanowires in aqueous solution.
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Affiliation(s)
- Anand Viswanath
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
| | - Pravin Paudel
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
| | | | - Alexandra N. Green
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
| | - Andrew B. Greytak
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
| | - Brian C. Benicewicz
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
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