scholarly journals Wafer-scale synthesis of defined polymer brushes under ambient conditions

2015 ◽  
Vol 6 (47) ◽  
pp. 8176-8183 ◽  
Author(s):  
Tao Zhang ◽  
Yunhao Du ◽  
Jana Kalbacova ◽  
René Schubel ◽  
Raul D. Rodriguez ◽  
...  
Keyword(s):  
Polymer Brushes ◽  
Ambient Conditions ◽  
Wafer Scale ◽  
Multiblock Copolymer ◽  
Copolymer Brushes

A facile method to synthesize dense, homo- and multiblock copolymer brushes on the wafer-scale under ambient conditions is presented.

Multi-Stimuli-Responsive Mesoporous Membranes and Effect of Molecular Architecture on Thermo- and pH-Responsive Behavior of the grafted Block Copolymer brushes

2019 ◽  
Author(s):  
Yanchun Tang ◽  
Kohzo Ito ◽  
Hideaki Yokoyama
Keyword(s):  
Polymer Brushes ◽  
Diblock Copolymers ◽  
Neutron Reflectivity ◽  
Molecular Architecture ◽  
Stimuli Responsive ◽  
Responsive Polymer ◽  
The Matrix ◽  
Stable Part ◽  
Copolymer Brushes ◽  
Mesoporous Membranes

In this study, we prepared ultrafiltration membranes with a decoupled responses of filtration property to temperature and pH. The membrane preparation method was developed based on our previous work. We utilized methanol-supercritical carbon dioxide (methanol-scCO<sub>2</sub>) selective swelling method to introduce nanopores to block copolymers containing poly(diethylene glycol) methyl ether methacrylate (PMEO<sub>2</sub>MA), poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA) and polystyrene (PS) blocks. Formation of the mesoporous barrier layer with PS being the mechanically stable part of the matrix was driven by selective swelling of the PMEO<sub>2</sub>MA-b-PDMAEMA domains. Due to the selective swelling of PMEO<sub>2</sub>MA or PDMAEMA domains to introduce pores, the interior of the pores are covered with PMEO<sub>2</sub>MA or PDMAEMA blocks after pore formation. The PMEO<sub>2</sub>MA-b-PDMAEMA polymer brushes are naturally attached on the pore walls and worked as functional gates. PMEO<sub>2</sub>MA is a non-toxic, neutral thermo-responsive polymer with LCST at 26 ᴼC. PDMAEMA is a typical weak polyelectrolyte with pK<sub>a</sub> value at 7.0-7.5 and also a thermo-responsive polymer revealed a LCST of 20-80 °C in aqueous solution. Therefore, these membranes were expected to have multi dimensions as function of the combination of temperature and pH. Moreover, to understand the detail of the temperature and pH depended conformation transitions of PMEO<sub>2</sub>MA-b-PDMAEMA brushes, those diblock copolymers were end-tethered on flat substrates and analyzed via neutron reflectivity (NR).

The Effect of Chain Length on Polyelectrolyte Brushes Formed from Adsorption of Diblock Copolymers

2013 ◽  
Vol 800 ◽  
pp. 428-431
Author(s):  
Yang Yang ◽  
Chun Cheng Zuo ◽  
Yu Xin Zuo ◽  
Ying Yu
Keyword(s):  
Chain Length ◽  
Polymer Brushes ◽  
Diblock Copolymers ◽  
Positive Charge ◽  
Surface Adsorption ◽  
Crystal Surfaces ◽  
Dynamic Simulations ◽  
Polyelectrolyte Brushes ◽  
Adsorption Density ◽  
Copolymer Brushes

The formation process of diblock copolymer brushes, formed by the adsorption of flexible chains on the surface is studied by Molecular Dynamic simulations. The surface adsorption density has been distinguished, depending on the various chain structures and counterions. The mode was considered as size ratio of A-block lengths to the the chain length, B-block carries the positive charge, and add counterions to the system. The result shows that the surface adsorption density is affected strongly by ratio of A-block length to the chain length, inhibited by the counterions, which is qualitatively consistent with experiments. These initial findings can be used as a guide for the preparation of actual diblock polymer brushes on metal crystal surfaces membranes by the adsorption approach.

scholarly journals Accessible and sustainable Cu(0)-mediated radical polymerisation for the functionalisation of surfaces

2020 ◽  
Vol 11 (23) ◽  
pp. 3831-3840
Author(s):  
Oliver Frank Uttley ◽  
Leonie Alice Brummitt ◽  
Stephen David Worrall ◽  
Steve Edmondson
Keyword(s):  
Polymer Brushes ◽  
Cationic Polymer ◽  
Environmentally Benign ◽  
Controlled Growth ◽  
Ambient Conditions ◽  
Radical Polymerisation ◽  
Benign Solvents ◽  
Surface Functionalisation

Towards use of environmentally benign solvents and ambient conditions for surface functionalisation by controlled growth of thick cationic polymer brushes.

Magnetic carbon nanotubes grafted with smart polymer brushes for highly efficient enantioseparation of tryptophan enantiomers

2019 ◽  
Vol 11 (47) ◽  
pp. 5953-5962 ◽  
Author(s):  
Xiao-Rong Yang ◽  
Li Lei ◽  
Zhuo Peng ◽  
Hai-Rong Yu ◽  
Chang-Jing Cheng
Keyword(s):  
Carbon Nanotubes ◽  
Polymer Brushes ◽  
Chiral Recognition ◽  
Smart Polymer ◽  
Highly Efficient ◽  
Tryptophan Enantiomers ◽  
Chiral Carbon ◽  
Magnetic Carbon ◽  
Copolymer Brushes ◽  
Magnetic Carbon Nanotubes

We herein report a novel chiral carbon nanotube nanomaterial (MCNTs–PNG–CD) grafted with smart copolymer brushes for highly efficient chiral recognition and separation of tryptophan enantiomers (dl-Trp).

scholarly journals Versatile synthesis and micropatterning of nonfouling polymer brushes on the wafer scale

2009 ◽  
Vol 4 (2) ◽  
pp. FA50-FA57 ◽  
Author(s):  
Angus Hucknall ◽  
Andrew J. Simnick ◽  
Ryan T. Hill ◽  
Ashutosh Chilkoti ◽  
Andres Garcia ◽  
...  
Keyword(s):  
Polymer Brushes ◽  
Wafer Scale

Simultaneous Preparation of Multiple Polymer Brushes under Ambient Conditions using Microliter Volumes

2018 ◽  
Vol 130 (41) ◽  
pp. 13621-13626 ◽  
Author(s):  
Benjaporn Narupai ◽  
Zachariah A. Page ◽  
Nicolas J. Treat ◽  
Alaina J. McGrath ◽  
Christian W. Pester ◽  
...  
Keyword(s):  
Polymer Brushes ◽  
Ambient Conditions

Post-polymerization modification of styrene–maleic anhydride copolymer brushes

2017 ◽  
Vol 8 (44) ◽  
pp. 6778-6785 ◽  
Author(s):  
Wei Guo ◽  
Li Xiong ◽  
Cassandra M. Reese ◽  
Douglas V. Amato ◽  
Brittany J. Thompson ◽  
...  
Keyword(s):  
Maleic Anhydride ◽  
Polymer Brushes ◽  
Functional Surfaces ◽  
Styrene Maleic Anhydride ◽  
Copolymer Brushes ◽  
Maleic Anhydride Copolymer ◽  
Post Modification

Amine-anhydride reactions on polymer brushes provide a modular post-modification strategy to functional surfaces.

Temperature responsive polymer brushes grafted from graphene oxide: an efficient fluorescent sensing platform for 2,4,6-trinitrophenol

2016 ◽  
Vol 4 (29) ◽  
pp. 7083-7092 ◽  
Author(s):  
Yajiao Song ◽  
Jianhua Lü ◽  
Bingxin Liu ◽  
Changli Lü
Keyword(s):  
Graphene Oxide ◽  
Polymer Brushes ◽  
Raft Polymerization ◽  
Selective Detection ◽  
Fluorescent Sensing ◽  
Temperature Responsive ◽  
Sensing Platform ◽  
Responsive Polymer ◽  
Responsive Behavior ◽  
Copolymer Brushes

The block copolymer brushes of PNIPAM-b-P(MQ-co-GMA) were grafted from GO by RAFT polymerization. The resulting luminescent hybrid containing Alq3exhibited a robust temperature-responsive behavior and could be used as a nano-platform for the sensitive and selective detection of TNP.

Surface-initiated atom-transfer radical polymerization from polyethersulfone membranes and their use in antifouling

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Liang Li ◽  
Guoping Yan ◽  
Jiangyu Wu ◽  
Xianghua Yu ◽  
Qingzhong Guo
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Photoelectron Spectroscopy ◽  
Polymer Brushes ◽  
Atom Transfer ◽  
Step Method ◽  
Protein Resistance ◽  
Copolymer Brushes ◽  
Pes Membrane ◽  
Surface Modified

AbstractA simple one-step method for the chloromethylation of polyethersulfone (PES) under mild conditions provided surface benzyl chloride groups as the active initiators for the surface-initiated atom-transfer radical polymerization (ATRP) to tailor the functionality of the PES membrane. Functional hydrophilic polymer brushes of poly(ethylene glycol)monomethacrylate (PEGMA) and sodium 4- styrenesulfonate (NaStS), as well as their block copolymer brushes, were prepared via surface initiated ATRP from the chloromethylated PES surfaces. X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) were used to characterize the surface-modified membranes. The PEGMA-grafted PES membranes showed great protein resistance to protein adsorption compared to the pristine PES surface.

Sign in / Sign up

Export Citation Format

Share Document