Surface Rearrangement of Diblock Copolymer Brushes—Stimuli Responsive Films

2006 ◽  
pp. 125-147 ◽  
Author(s):  
William J. Brittain ◽  
Stephen G. Boyes ◽  
Anthony M. Granville ◽  
Marina Baum ◽  
Brian K. Mirous ◽  
...  
Keyword(s):  
Diblock Copolymer ◽  
Stimuli Responsive ◽  
Copolymer Brushes

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).

Ordered Diblock Copolymer Films on Random Copolymer Brushes

1997 ◽  
Vol 30 (22) ◽  
pp. 6810-6813 ◽  
Author(s):  
P. Mansky ◽  
T. P. Russell ◽  
C. J. Hawker ◽  
M. Pitsikalis ◽  
J. Mays
Keyword(s):  
Diblock Copolymer ◽  
Random Copolymer ◽  
Copolymer Films ◽  
Copolymer Brushes

Self-Assembled Morphologies of Diblock Copolymer Brushes in Poor Solvents

2012 ◽  
Vol 45 (11) ◽  
pp. 4920-4931 ◽  
Author(s):  
Run Jiang ◽  
Baohui Li ◽  
Zheng Wang ◽  
Yuhua Yin ◽  
An-Chang Shi
Keyword(s):  
Diblock Copolymer ◽  
Self Assembled ◽  
Copolymer Brushes

From multi-responsive tri- and diblock copolymers to diblock-copolymer-decorated gold nanoparticles: the effect of architecture on micellization behaviors in aqueous solutions

Soft Matter ◽  
2015 ◽  
Vol 11 (24) ◽  
pp. 4830-4839 ◽  
Author(s):  
Lichun Song ◽  
Hui Sun ◽  
Xiaolu Chen ◽  
Xia Han ◽  
Honglai Liu
Keyword(s):  
Gold Nanoparticles ◽  
Aqueous Solutions ◽  
Diblock Copolymer ◽  
Triblock Copolymer ◽  
Diblock Copolymers ◽  
Stimuli Responsive ◽  
Aba Triblock Copolymer

This work reports on the aqueous stimuli-responsive behaviors of an ABA triblock copolymer, a BAB triblock copolymer, an AB diblock copolymer and citrate-based gold nanoparticles decorated with AB diblock copolymers.

Memory Effects of Diblock Copolymer Brushes and Mixed Brushes

Langmuir ◽  
2010 ◽  
Vol 26 (2) ◽  
pp. 1291-1303 ◽  
Author(s):  
Jiafang Wang ◽  
Marcus Müller
Keyword(s):  
Diblock Copolymer ◽  
Memory Effects ◽  
Copolymer Brushes
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