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Dutta S, Sing CE. Brownian dynamics simulations of bottlebrush polymers in dilute solution under simple shear and uniaxial extensional flows. J Chem Phys 2024; 160:044901. [PMID: 38258921 DOI: 10.1063/5.0177113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 01/01/2024] [Indexed: 01/24/2024] Open
Abstract
We study the dynamics of bottlebrush polymer molecules in dilute solutions subjected to shear and uniaxial extensional flows using Brownian dynamics simulations with hydrodynamic interaction (HI). Bottlebrush polymers are modeled using a coarse-grained representation, consisting of a set of beads interacting pairwise via a purely repulsive potential and connected by finitely extensible nonlinear springs. We present the results for molecular stretching, stress, and solution viscosity during the startup of flow as well as under steady state as a function of side chain length while keeping the backbone length fixed. In extensional flow, the backbone fractional extension and the first normal stress difference decrease with an increase in side chain length at a fixed Weissenberg number (Wi). Using simulation results both in the presence of and in the absence of HI, we show that this is primarily a consequence of steric interaction resulting from the dense grafting of side chains. In shear flow, we observe a shear-thinning behavior in all cases, although it becomes less pronounced with increasing side chain length. Furthermore, nonmonotonicity in the backbone fractional extension is observed under shear, particularly at high Wi. We contextualize our simulation results for bottlebrush polymers with respect to existing studies in the literature for linear polymers and show that the unique dynamical features characterizing bottlebrush polymers arise on account of their additional molecular thickness due to the presence of densely grafted side chains.
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Affiliation(s)
- Sarit Dutta
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 S Mathews Avenue, Urbana, Illinois 61801, USA
| | - Charles E Sing
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 S Mathews Avenue, Urbana, Illinois 61801, USA
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Fang Y, Cai J, Ren M, Zhong T, Wang D, Zhang K. Inhalable Bottlebrush Polymer Bioconjugates as Vectors for Efficient Pulmonary Delivery of Oligonucleotides. ACS NANO 2024; 18:592-599. [PMID: 38147573 PMCID: PMC10786149 DOI: 10.1021/acsnano.3c08660] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 12/18/2023] [Accepted: 12/20/2023] [Indexed: 12/28/2023]
Abstract
Antisense oligonucleotides hold therapeutic promise for various lung disorders, but their efficacy is limited by suboptimal delivery. To address this challenge, we explored the use of inhaled bottlebrush polymer-DNA conjugates, named pacDNA, as a delivery strategy. Inhaled pacDNA exhibits superior mucus penetration, achieving a uniform and sustained lung distribution in mice. Targeting the 5' splice site of an aberrant enhanced green fluorescence protein (EGFP) pre-mRNA in EGFP-654 mice, inhaled pacDNA more efficiently corrects splicing than a B-peptide conjugate and restores EGFP expression in the lung. Additionally, in an orthotopic NCI-H358 non-small-cell lung tumor mouse model, inhaled pacDNA targeting wild-type KRAS mRNA effectively suppresses KRAS expression and inhibits lung tumor growth, requiring a substantially lower dosage compared to intravenously injected pacDNA. These findings demonstrate the potential of bottlebrush polymer-DNA conjugates as a promising agent for enhanced oligonucleotide therapy in the lung and advancing the treatment landscape for lung disorders.
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Affiliation(s)
- Yang Fang
- Department of Chemistry and Chemical
Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Jiansong Cai
- Department of Chemistry and Chemical
Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Mengqi Ren
- Department of Chemistry and Chemical
Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Tongtong Zhong
- Department of Chemistry and Chemical
Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Dali Wang
- Department of Chemistry and Chemical
Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Ke Zhang
- Department of Chemistry and Chemical
Biology, Northeastern University, Boston, Massachusetts 02115, United States
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Fan ZW, Jin XL, Chen Y, Lu M, Wang YR, Yue K, Wen T, Tang L, Wu ZL, Sun T. Topology and Dynamic Regulations of Comb-like Polymers as Strong Adhesives. Macromolecules 2023. [DOI: 10.1021/acs.macromol.2c01851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Affiliation(s)
- Zhi Wei Fan
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, South China University of Technology, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Xiao Lin Jin
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, South China University of Technology, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Yang Chen
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, South China University of Technology, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Mengze Lu
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, South China University of Technology, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Yi Ru Wang
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, South China University of Technology, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Kan Yue
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, South China University of Technology, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Tao Wen
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, South China University of Technology, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Liqun Tang
- School of Civil Engineering and Transportation, South China University of Technology, No. 381, Wushan Road, Guangzhou 510640, China
| | - Zi Liang Wu
- Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Taolin Sun
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, South China University of Technology, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China University of Technology, Guangzhou 510640, China
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Shi Y, Chen SPR, Fragkiadakis G, Parisi D, Percec V, Vlassopoulos D, Monteiro MJ. Shape Control over the Polymer Molecular Weight Distribution and Influence on Rheological Properties. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c02311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Yanlin Shi
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD4072, Australia
| | - Sung-Po R. Chen
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD4072, Australia
| | - George Fragkiadakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology Hellas (FORTH), Heraklion70013, Greece
- Department of Materials Science & Technology, University of Crete, Heraklion70013, Greece
| | - Daniele Parisi
- Department of Chemical Engineering, Product Technology, University of Groningen, Nijenborgh 4, 9747 AGGroningen, The Netherlands
| | - Virgil Percec
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Philadelphia, Philadelphia, Pennsylvania19104-6323, United States
| | - Dimitris Vlassopoulos
- Institute of Electronic Structure and Laser, Foundation for Research and Technology Hellas (FORTH), Heraklion70013, Greece
- Department of Materials Science & Technology, University of Crete, Heraklion70013, Greece
| | - Michael J. Monteiro
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD4072, Australia
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Rheology of Poly(glycidyl methacrylate) Macromolecular Nano Assemblies. Polymers (Basel) 2022; 14:polym14030455. [PMID: 35160445 PMCID: PMC8839273 DOI: 10.3390/polym14030455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 01/19/2022] [Accepted: 01/20/2022] [Indexed: 12/04/2022] Open
Abstract
A recently reported combined polymerization process of glycidyl methacrylate, mediated by homometallic and heterobimetallic aluminium complexes, naturally produces nano-sized macromolecular assemblies. In this work, the morphological features and the rheological properties of these novel nanoassemblies are studied. The hydrodynamic sizes of the nanoparticles in the solution range from 10 to 40 nm (in numbers), but on a flat surface they adopt a characteristic thin disk shape. The dynamic moduli have been determined in a broad range of temperatures, and the time—temperature superposition applied to obtain master curves of the whole viscoelastic response from the glassy to the terminal regions. The fragility values obtained from the temperature dependence are of m ~40, typical of van de Waals liquids, suggesting a very effective packing of the macromolecular assemblies. The rheological master curves feature a characteristic viscoelastic relaxation with the absence of elastic intermediate plateau, indicating that the systems behaved as un-entangled polymers. The analysis of the linear viscoelastic fingerprint reveals a Zimm-like dynamics at intermediate frequencies typical of unentangled systems. This behaviour resembles that observed in highly functionalized stars, dendrimers, soft colloids and microgels.
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Bichler KJ, Jakobi B, Schneider GJ. Dynamics of bottlebrush polymers. EPJ WEB OF CONFERENCES 2022. [DOI: 10.1051/epjconf/202227201002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Bottlebrushes are an interesting class of polymers which shows intriguing material properties often associated with dynamics. While dynamical phenomena in linear polymers are well understood and existing theories can describe them in a good way, bottlebrush dynamics have only rarely been investigated. Therefore, we performed dielectric spectroscopy and quasi-elastic neutron scattering to study the dynamics of polydimethylsiloxane-based bottlebrush polymers, PDMS-g-PDMS focusing mostly on the segmental dynamics of the side chains. Comparing the relaxation times of the α – relaxation, tracked with dielectric spectroscopy, of bottlebrush polymers with those of their respective linear side chains show a slowing down once the side chains are attached to the backbone. This effect diminishes and finally vanishes with increasing side chain length. The time and length scale, offered by quasi-elastic neutron scattering, fits for the segmental dynamics together with faster processes. The Q-dependence of the segmental relaxation times allows to classify bottlebrush polymers as heterogenous including a non-Gaussian character. For such a dynamical system, the mean square displacement needs to be separated into single processes before an overall mean square displacement can be generated by applying the time temperature superposition principle.
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Pan X, Ding M, Li L. Experimental Validation on Average Conformation of a Comblike Polystyrene Library in Dilute Solutions: Universal Scaling Laws and Abnormal SEC Elution Behavior. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01029] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Xuejun Pan
- Food Science and Processing Research Center, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
- Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
| | - Mingming Ding
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Lianwei Li
- Food Science and Processing Research Center, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
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Vereroudakis E, Bang KT, Karouzou M, Ananiadou A, Noh J, Choi TL, Loppinet B, Floudas G, Vlassopoulos D. Multi-scale Structure and Dynamics of Dendronized Polymers with Varying Generations. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c02356] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Emmanouil Vereroudakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology (FORTH), 70013 Heraklion, Crete, Greece
- Department of Materials Science & Technology, University of Crete, 71003 Heraklion, Crete, Greece
| | - Ki-Taek Bang
- Department of Chemistry, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-747, Republic of Korea
| | - Maria Karouzou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology (FORTH), 70013 Heraklion, Crete, Greece
- Department of Materials Science & Technology, University of Crete, 71003 Heraklion, Crete, Greece
| | | | - Jinkyung Noh
- Department of Chemistry, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-747, Republic of Korea
| | - Tae-Lim Choi
- Department of Chemistry, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-747, Republic of Korea
| | - Benoit Loppinet
- Department of Materials Science & Technology, University of Crete, 71003 Heraklion, Crete, Greece
| | - George Floudas
- Department of Physics, University of Ioannina, 45110 Ioannina, Greece
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Dimitris Vlassopoulos
- Institute of Electronic Structure and Laser, Foundation for Research and Technology (FORTH), 70013 Heraklion, Crete, Greece
- Department of Materials Science & Technology, University of Crete, 71003 Heraklion, Crete, Greece
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