Neutron Reflectivity Study of the Structure of pH-Responsive Polymer Brushes Grown from a Macroinitiator at the Sapphire−Water Interface

Langmuir ◽  
2010 ◽  
Vol 26 (15) ◽  
pp. 12684-12689 ◽  
Author(s):  
Mauro Moglianetti ◽  
John R. P. Webster ◽  
Steve Edmondson ◽  
Steven P. Armes ◽  
Simon Titmuss
Keyword(s):  
Polymer Brushes ◽  
Neutron Reflectivity ◽  
Water Interface ◽  
Ph Responsive ◽  
Responsive Polymer

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).

Pickering emulsions stabilized by palygorskite particles grafted with pH-responsive polymer brushes

RSC Advances ◽  
2015 ◽  
Vol 5 (13) ◽  
pp. 9416-9424 ◽  
Author(s):  
Jia Lu ◽  
Wei Zhou ◽  
Jing Chen ◽  
Yeling Jin ◽  
Keisha B. Walters ◽  
...  
Keyword(s):  
Polymer Brushes ◽  
Pickering Emulsions ◽  
Ph Responsive ◽  
Responsive Polymer

The reversibility of emulsions stabilized by PAL–PDEAEMA particles switched by pH can last at least seven successive cycles.

scholarly journals Facile Formation of Highly Mobile Supported Lipid Bilayers on Surface-Quaternized pH-Responsive Polymer Brushes

2015 ◽  
Vol 48 (9) ◽  
pp. 3095-3103 ◽  
Author(s):  
N. Cheng ◽  
P. Bao ◽  
S. D. Evans ◽  
G. J. Leggett ◽  
S. P. Armes
Keyword(s):  
Lipid Bilayers ◽  
Polymer Brushes ◽  
Supported Lipid Bilayers ◽  
Ph Responsive ◽  
Responsive Polymer

Bidimensional Response Maps of Adaptive Thermo- and pH-Responsive Polymer Brushes

2010 ◽  
Vol 43 (18) ◽  
pp. 7744-7751 ◽  
Author(s):  
Xavier Laloyaux ◽  
Bertrand Mathy ◽  
Bernard Nysten ◽  
Alain M. Jonas
Keyword(s):  
Polymer Brushes ◽  
Ph Responsive ◽  
Responsive Polymer

scholarly journals ON/OFF switching of silicon wafer electrochemistry by pH-responsive polymer brushes

2016 ◽  
Vol 4 (26) ◽  
pp. 6287-6294 ◽  
Author(s):  
G. Panzarasa ◽  
M. Dübner ◽  
V. Pifferi ◽  
G. Soliveri ◽  
C. Padeste
Keyword(s):  
Silicon Wafer ◽  
Methacrylic Acid ◽  
Polymer Brushes ◽  
Ph Responsive ◽  
Controlled Switching ◽  
Responsive Polymer ◽  
Grafting From ◽  
Hybrid Devices ◽  
Ph Controlled

Grafting-from of poly(methacrylic acid) brushes enables pH-controlled switching of silicon wafer electrochemistry, making possible the design of new electrochemical hybrid devices.

Switching Transport through Nanopores with pH-Responsive Polymer Brushes for Controlled Ion Permeability

2013 ◽  
Vol 5 (4) ◽  
pp. 1400-1407 ◽  
Author(s):  
G. Wilhelmina de Groot ◽  
M. Gabriella Santonicola ◽  
Kaori Sugihara ◽  
Tomaso Zambelli ◽  
Erik Reimhult ◽  
...  
Keyword(s):  
Polymer Brushes ◽  
Ion Permeability ◽  
Ph Responsive ◽  
Responsive Polymer

Coupling pH-Responsive Polymer Brushes to Electricity: Switching Thickness and Creating Waves of Swelling or Collapse

Langmuir ◽  
2013 ◽  
Vol 29 (11) ◽  
pp. 3628-3635 ◽  
Author(s):  
Gary J. Dunderdale ◽  
J. Patrick A. Fairclough
Keyword(s):  
Polymer Brushes ◽  
Ph Responsive ◽  
Responsive Polymer
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