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Ishraaq R, Das S. All-atom molecular dynamics simulations of polymer and polyelectrolyte brushes. Chem Commun (Camb) 2024; 60:6093-6129. [PMID: 38819435 DOI: 10.1039/d4cc01557f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2024]
Abstract
Densely grafted polymer and polyelectrolyte (PE) brushes, owing to their significant abilities to functionalize surfaces for a plethora of applications in sensing, diagnostics, current rectification, surface wettability modification, drug delivery, and oil recovery, have attracted significant attention over the past several decades. Unfortunately, most of the attention has primarily focused on understanding the properties of the grafted polymer and the PE chains with little attention devoted to studying the behavior of the brush-supported ions (counterions needed to screen the PE chains) and water molecules. Over the past few years, our group has been at the forefront of addressing this gap: we have employed all-atom molecular dynamics (MD) simulations for studying a wide variety of polymer and PE brush systems with specific attention to unraveling the properties and behavior of the brush-supported water molecules and ions. Our findings have revealed some of the most fascinating properties of such brush-supported ions and water molecules, including the most remarkable control of nanofluidic transport afforded by the specific ion and water responses induced by the PE brushes grafted on the inner walls of the nanochannel. This feature article aims to summarize some of our key contributions associated with such atomistic simulations of polymer and PE brushes and brush-supported water molecules and counterions.
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Affiliation(s)
- Raashiq Ishraaq
- Department of Mechanical Engineering, University of Maryland, College Park, MD 20742, USA.
| | - Siddhartha Das
- Department of Mechanical Engineering, University of Maryland, College Park, MD 20742, USA.
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Hussain N, Mehdi M, Yousif M, Ali A, Ullah S, Hussain Siyal S, Hussain T, Kim IS. Synthesis of Highly Conductive Electrospun Recycled Polyethylene Terephthalate Nanofibers Using the Electroless Deposition Method. NANOMATERIALS 2021; 11:nano11020531. [PMID: 33669798 PMCID: PMC7922688 DOI: 10.3390/nano11020531] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 02/08/2021] [Accepted: 02/16/2021] [Indexed: 02/01/2023]
Abstract
Plastic bottles are generally recycled by remolding them into numerous products. In this study, waste from plastic bottles was used to fabricate recycled polyethylene terephthalate (r-PET) nanofibers via the electrospinning technique, and high-performance conductive polyethylene terephthalate nanofibers (r-PET nanofibers) were prepared followed by copper deposition using the electroless deposition (ELD) method. Firstly, the electrospun r-PET nanofibers were chemically modified with silane molecules and polymerized with 2-(methacryloyloxy) ethyl trimethylammonium chloride (METAC) solution. Finally, the copper deposition was achieved on the surface of chemically modified r-PET nanofibers by simple chemical/ion attraction. The water contact angle of r-PET nanofibers, chemically modified r-PET nanofibers, and copper deposited nanofibers were 140°, 80°, and 138°, respectively. The r-PET nanofibers retained their fibrous morphology after copper deposition, and EDX results confirmed the presence of copper on the surface of r-PET nanofibers. XPS was performed to analyze chemical changes before and after copper deposition on r-PET nanofibers. The successful deposition of copper one r-PET nanofibers showed an excellent electrical resistance of 0.1 ohms/cm and good mechanical strength according to ASTM D-638.
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Affiliation(s)
- Nadir Hussain
- Nano Fusion Technology Research Group, Division of Frontier Fibers, Institute for Fiber Engineering (IFES), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, Tokida 3-15-1, Ueda, Nagano Prefecture 386-8567, Japan; (N.H.); (S.U.)
| | - Mujahid Mehdi
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China; (M.M.); (M.Y.)
| | - Muhammad Yousif
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China; (M.M.); (M.Y.)
| | - Aizaz Ali
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China;
| | - Sana Ullah
- Nano Fusion Technology Research Group, Division of Frontier Fibers, Institute for Fiber Engineering (IFES), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, Tokida 3-15-1, Ueda, Nagano Prefecture 386-8567, Japan; (N.H.); (S.U.)
| | - Sajid Hussain Siyal
- Department of Metallurgy and Materials Engineering, Dawood University of Engineering and Technology, Karachi 74800, Pakistan;
| | - Tanweer Hussain
- Centre of Excellence in Nanotechnology and Materials, Mehran University of Engineering and Technology, Jamshoro 76060, Pakistan;
| | - Ick Soo Kim
- Nano Fusion Technology Research Group, Division of Frontier Fibers, Institute for Fiber Engineering (IFES), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, Tokida 3-15-1, Ueda, Nagano Prefecture 386-8567, Japan; (N.H.); (S.U.)
- Correspondence: ; Tel.: +81-268-21-5439; Fax: +81-268-21-5482
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Lubis R, Wirjosentono B, Eddyanto, Septevani AA. Preparation, characterization and antimicrobial activity of grafted cellulose fiber from durian rind waste. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125311] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Uttley OF, Brummitt LA, Worrall SD, Edmondson S. Accessible and sustainable Cu(0)-mediated radical polymerisation for the functionalisation of surfaces. Polym Chem 2020. [DOI: 10.1039/d0py00516a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Towards use of environmentally benign solvents and ambient conditions for surface functionalisation by controlled growth of thick cationic polymer brushes.
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Affiliation(s)
- Oliver Frank Uttley
- Department of Materials
- School of Natural Sciences
- University of Manchester
- Manchester
- UK
| | - Leonie Alice Brummitt
- Department of Materials
- School of Natural Sciences
- University of Manchester
- Manchester
- UK
| | - Stephen David Worrall
- Aston Institute of Materials Research
- School of Engineering and Applied Science
- Aston University
- Birmingham
- UK
| | - Steve Edmondson
- Department of Materials
- School of Natural Sciences
- University of Manchester
- Manchester
- UK
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Thiol-based chemistry as versatile routes for the effective functionalization of cellulose nanofibers. Carbohydr Polym 2019; 226:115259. [DOI: 10.1016/j.carbpol.2019.115259] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 08/25/2019] [Accepted: 08/26/2019] [Indexed: 11/17/2022]
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Smart, biocompatible, responsive surfaces on pH, temperature and ionic strength of titanium oxide and niobium oxide with polymer brushes of poly(acrylic acid), poly(N-isopropylacrylamide) and poly([2-(methacryloyloxy)ethyl] trimethylammonium chloride). Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.01.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Fenoy GE, Giussi JM, von Bilderling C, Maza EM, Pietrasanta LI, Knoll W, Marmisollé WA, Azzaroni O. Reversible modulation of the redox activity in conducting polymer nanofilms induced by hydrophobic collapse of a surface-grafted polyelectrolyte. J Colloid Interface Sci 2018; 518:92-101. [DOI: 10.1016/j.jcis.2018.02.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2018] [Revised: 01/30/2018] [Accepted: 02/04/2018] [Indexed: 12/30/2022]
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Zafrani Y, Amir D, Yehezkel L, Madmon M, Saphier S, Karton-Lifshin N, Gershonov E. Chemoselective N-Difluoromethylation of Functionalized Tertiary Amines. J Org Chem 2016; 81:9180-9187. [DOI: 10.1021/acs.joc.6b01728] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Yossi Zafrani
- The Department
of Organic
Chemistry, Israel Institute for Biological Research, Ness-Ziona 74100, Israel
| | - Dafna Amir
- The Department
of Organic
Chemistry, Israel Institute for Biological Research, Ness-Ziona 74100, Israel
| | - Lea Yehezkel
- The Department
of Organic
Chemistry, Israel Institute for Biological Research, Ness-Ziona 74100, Israel
| | - Moran Madmon
- The Department
of Organic
Chemistry, Israel Institute for Biological Research, Ness-Ziona 74100, Israel
| | - Sigal Saphier
- The Department
of Organic
Chemistry, Israel Institute for Biological Research, Ness-Ziona 74100, Israel
| | - Naama Karton-Lifshin
- The Department
of Organic
Chemistry, Israel Institute for Biological Research, Ness-Ziona 74100, Israel
| | - Eytan Gershonov
- The Department
of Organic
Chemistry, Israel Institute for Biological Research, Ness-Ziona 74100, Israel
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