Novel pH-responsive mixed-charge copolymer brushes based on carboxylic acid and quaternary amine monomers

2013 ◽  
Vol 51 (7) ◽  
pp. 1612-1619 ◽  
Author(s):  
Serkan Demirci ◽  
Selin Kinali-Demirci ◽  
Tuncer Caykara
Keyword(s):  
Carboxylic Acid ◽  
Ph Responsive ◽  
Quaternary Amine ◽  
Copolymer Brushes

pH responsive properties of non-fouling mixed-charge polymer brushes based on quaternary amine and carboxylic acid monomers

Biomaterials ◽  
2010 ◽  
Vol 31 (10) ◽  
pp. 2919-2925 ◽  
Author(s):  
Luo Mi ◽  
Matthew T. Bernards ◽  
Gang Cheng ◽  
Qiuming Yu ◽  
Shaoyi Jiang
Keyword(s):  
Carboxylic Acid ◽  
Polymer Brushes ◽  
Ph Responsive ◽  
Quaternary Amine ◽  
Non Fouling

Dual-temperature and pH responsive (ethylene glycol)-based nanogels via structural design

2014 ◽  
Vol 5 (8) ◽  
pp. 3061-3070 ◽  
Author(s):  
Yohei Kotsuchibashi ◽  
Ravin Narain
Keyword(s):  
Carboxylic Acid ◽  
Ethylene Glycol ◽  
Salt Concentration ◽  
Structural Design ◽  
Solution Temperature ◽  
Ph Responsive ◽  
Solution Ph ◽  
Critical Solution Temperature ◽  
Carboxylic Acid Groups ◽  
The Core

Dual-temperature and pH responsive (ethylene glycol)-based nanogels were synthesized. Both the core and the shell of the nanogels showed a lower critical solution temperature (LCST) and the LCST of the shell was strongly affected by the solution pH and salt concentration due to the presence of carboxylic acid groups at the nanogel surface.

A stimuli responsive two component supramolecular hydrogelator with aggregation-induced emission properties

Soft Matter ◽  
2019 ◽  
Vol 15 (36) ◽  
pp. 7117-7121 ◽  
Author(s):  
Dennis Aschmann ◽  
Steffen Riebe ◽  
Thorben Neumann ◽  
Dennis Killa ◽  
Jan-Erik Ostwaldt ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Stimuli Responsive ◽  
Ph Responsive ◽  
Aggregation Induced Emission ◽  
Emission Properties ◽  
Two Component

A dual pH-responsive two component hydrogelator with aggregation-induced emission properties is described. The orchestration of supramolecular guadiniumcarbonylpyrrole dimerisation and the recognition of carboxylic acid is reason for the gelation.

Thermoresponsive Copolymer Brushes Possessing Quaternary Amine Groups for Strong Anion-Exchange Chromatographic Matrices

2014 ◽  
Vol 15 (3) ◽  
pp. 1031-1043 ◽  
Author(s):  
Kenichi Nagase ◽  
Mike Geven ◽  
Saori Kimura ◽  
Jun Kobayashi ◽  
Akihiko Kikuchi ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Quaternary Amine ◽  
Strong Anion Exchange ◽  
Amine Groups ◽  
Copolymer Brushes

Weak acid-strong base type charge-mosaic membrane. I. Carboxylic acid-quaternary amine system

1989 ◽  
Vol 43 (2-3) ◽  
pp. 205-216 ◽  
Author(s):  
Yoshinobu Isono ◽  
Hiroshi Ito ◽  
Kazuhiro Hirahara ◽  
Teruo Fujimoto ◽  
Yoshiyuki Miyaki
Keyword(s):  
Carboxylic Acid ◽  
Weak Acid ◽  
Quaternary Amine ◽  
Strong Base ◽  
Amine System

scholarly journals pH-Responsive Properties of Asymmetric Nanopapers of Nanofibrillated Cellulose

Nanomaterials ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1380
Author(s):  
Maud Chemin ◽  
Baptiste Beaumal ◽  
Bernard Cathala ◽  
Ana Villares
Keyword(s):  
Carboxylic Acid ◽  
Reaction Times ◽  
Nanofibrillated Cellulose ◽  
Ph Responsive ◽  
Tempo Oxidation ◽  
Ph Changes ◽  
Charge Concentration ◽  
Amine Groups ◽  
Layer Composition ◽  
Electrostatic Repulsions

Inspired by plant movements driven by the arrangement of cellulose, we have fabricated nanopapers of nanofibrillated cellulose (NFC) showing actuation under pH changes. Bending was achieved by a concentration gradient of charged groups along the film thickness. Hence, the resulting nanopapers contained higher concentration of charged groups on one side of the film than on the opposite side, so that pH changes resulted in charge-dependent asymmetric deprotonation of the two layers. Electrostatic repulsions separate the nanofibers in the nanopaper, thus facilitating an asymmetric swelling and the subsequent expanding that results in bending. Nanofibrillated cellulose was modified by 2,2,6,6-tetramethylpiperidin-1-yloxyl radical (TEMPO) oxidation at two reaction times to get different surface concentrations of carboxylic acid groups. TEMPO-oxidized NFC was further chemically transformed into amine-modified NFC by amidation. The formation of graded nanopapers was accomplished by successive filtration of NFC dispersions with varying charge nature and/or concentration. The extent of bending was controlled by the charge concentration and the nanopaper thickness. The direction of bending was tuned by the layer composition (carboxylic acid or amine groups). In all cases, a steady-state was achieved within less than 25 s. This work opens new routes for the use of cellulosic materials as actuators.

Interaction of pH-responsive polyanions with phospholipid membranes

2019 ◽  
Vol 10 (44) ◽  
pp. 5992-5997 ◽  
Author(s):  
Edit Brodszkij ◽  
Martin J. Hviid ◽  
Carina Ade ◽  
Philipp S. Schattling ◽  
Moritz Burmeister ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Phospholipid Membranes ◽  
Ph Responsive ◽  
Acrylate Polymers

The behavior of two acrylate polymers, with carboxylic acid side groups, was investigated with regard to their pH-responsive interaction with phospholipid membranes.

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