Immobilization of Silver Nanoparticles on Responsive Polymer Brushes

2008 ◽  
Vol 41 (8) ◽  
pp. 2874-2879 ◽  
Author(s):  
Smrati Gupta ◽  
Petra Uhlmann ◽  
Mukesh Agrawal ◽  
Severine Chapuis ◽  
Ulrich Oertel ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Polymer Brushes ◽  
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).

scholarly journals Conformation Study of Dual Stimuli-Responsive Core-Shell Diblock Polymer Brushes

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1084
Author(s):  
Kaimin Chen ◽  
Lan Cao ◽  
Ying Zhang ◽  
Kai Li ◽  
Xue Qin ◽  
...  
Keyword(s):  
Polymer Brushes ◽  
Core Shell ◽  
Stimuli Responsive ◽  
Research Topics ◽  
Design And Synthesis ◽  
Mild Conditions ◽  
The Core ◽  
Responsive Polymer ◽  
Stimuli Responsive Polymer ◽  
Shed Light

Stimuli-responsive nanoparticles are among the most popular research topics. In this study, two types of core-shell (polystyrene with a photoiniferter (PSV) as the core and diblock as the shell) polymer brushes (PSV@PNIPA-b-PAA and PSV@PAA-b-PNIPA) were designed and prepared using surface-initiated photoiniferter-mediated polymerization (SI-PIMP). Moreover, their pH- and temperature-stimuli responses were explored by dynamic light scattering (DLS) and turbidimeter under various conditions. The results showed that the conformational change was determined on the basis of the competition among electrostatic repulsion, hydrophobic interaction, hydrogen bonding, and steric hindrance, which was also confirmed by protein adsorption experiments. These results are not only helpful for the design and synthesis of stimuli-responsive polymer brushes but also shed light on controlled protein immobilization under mild conditions.

Micro-cantilevers with end-grafted stimulus-responsive polymer brushes for actuation and sensing

2006 ◽  
Vol 114 (1) ◽  
pp. 371-378 ◽  
Author(s):  
Nehal I. Abu-Lail ◽  
Marian Kaholek ◽  
Bruce LaMattina ◽  
Robert L. Clark ◽  
Stefan Zauscher
Keyword(s):  
Polymer Brushes ◽  
Stimulus Responsive ◽  
Responsive Polymer

Switching Water Droplet Adhesion Using Responsive Polymer Brushes

Langmuir ◽  
2010 ◽  
Vol 26 (14) ◽  
pp. 12377-12382 ◽  
Author(s):  
Xinjie Liu ◽  
Qian Ye ◽  
Bo Yu ◽  
Yongmin Liang ◽  
Weimin Liu ◽  
...  
Keyword(s):  
Water Droplet ◽  
Polymer Brushes ◽  
Responsive Polymer

scholarly journals Novel temperature-responsive polymer brushes with carbohydrate residues facilitate selective adhesion and collection of hepatocytes

2012 ◽  
Vol 13 (6) ◽  
pp. 064206 ◽  
Author(s):  
Naokazu Idota ◽  
Mitsuhiro Ebara ◽  
Yohei Kotsuchibashi ◽  
Ravin Narain ◽  
Takao Aoyagi
Keyword(s):  
Polymer Brushes ◽  
Temperature Responsive ◽  
Responsive Polymer

Immobilization of silver nanoparticles into POEGMA polymer brushes as SERS-active substrates

2016 ◽  
Vol 49 (4) ◽  
pp. 316-322 ◽  
Author(s):  
Qian Zhang ◽  
Jun-Jiao Yin ◽  
Feng Liu ◽  
Xue-Na Zou ◽  
Li-Qiang Chu
Keyword(s):  
Silver Nanoparticles ◽  
Polymer Brushes

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.

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