scholarly journals Preparation of a novel polyacrylic acid and chitosan interpenetrating network hydrogel for removal of U(vi) from aqueous solutions

RSC Advances ◽  
2018 ◽  
Vol 8 (23) ◽  
pp. 12684-12691 ◽  
Author(s):  
Jiarui He ◽  
Fuliang Sun ◽  
Fuhao Han ◽  
Junjie Gu ◽  
Minrui Ou ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Polyacrylic Acid ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Polluted Water ◽  
Interpenetrating Network ◽  
Simple Method

A clean and simple method has been developed for preparation of interpenetrating polymer networks using polyacrylic acid (PAA) and chitosan (CS) for extraction of uranium from polluted water.

Gelation of Polyacrylic Acid Aqueous Solutions and the Measurement of Viscosity

1975 ◽  
Vol 54 (6) ◽  
pp. 1173-1175 ◽  
Author(s):  
Stephen Crisp ◽  
Brian G. Lewis ◽  
Alan D. Wilson
Keyword(s):  
Aqueous Solutions ◽  
Polyacrylic Acid ◽  
Simple Method ◽  
Concentrated Aqueous Solutions ◽  
Polycarboxylic Acids ◽  
The Difference

A simple method is described for following changes in viscosity of concentrated aqueous solutions of polycarboxylic acids used in certain dental cements. The difference in behavior over several months between solutions of polyacrylic acid and related polyelectrolytes is discussed.

scholarly journals Chitosan and Quat-188 Modified Chitosan Poly(acrylic acid) Semi-Interpenetrating Network For Controlled Release of Drugs

KIMIKA ◽  
2015 ◽  
Vol 26 (1) ◽  
pp. 1-9
Author(s):  
Christian Gonzales ◽  
Mari Kaira O. Leal ◽  
Ivy Marie C. Andalis ◽  
Modesto T. Chua ◽  
Takahiko Nakaoki ◽  
...  
Keyword(s):  
Controlled Release ◽  
Acrylic Acid ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Trimethylammonium Chloride ◽  
Interpenetrating Network ◽  
Wet Strength ◽  
Modified Chitosan ◽  
Different Types ◽  
Ph Dependent

Semi-interpenetrating polymer networks (semi-IPNs) composed of polyacrylic acid (PAA), and chitosan or N-(3-chloro-2-hydroxypropyl)trimethylammonium chloride (Quat-188) modified chitosan were synthesized. To fabricate the semi-IPN, acrylic acid (AA) was polymerized and crosslinked in the presence of unmodified and Quat-188 modified chitosan. The wet strength of the semi-IPNs improved with the increase in molecular weight of chitosan, chitosan to PAA ratio and by Quat-188 modification. Both modified and unmodified semi-IPNs swelled in buffer solutions. Swelling was pH dependent. The mode of encapsulation and release of two different types of drugs from these semi IPNs was studied. Effects of various parameters on encapsulation and release of AgNO3 and mafenide acetate from these semi-IPNs were investigated. The semi-IPN hydrogel encapsulated 10 mmol/L AgNO3 (100% of added drug) in 5min and released 4% of it in 2h. In case of mafenide acetate, pH dependent encapsulation and controlled release was observed. It was observed that drug-semi IPN interaction strongly influences the encapsulation and release behavior. Freezable water associated with the hydrogels also played an important role for the encapsulation and release of drug.

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