Preparation and swelling behavior of pH/temperature responsive semi-IPN hydrogel based on carboxymethyl xylan and poly(N-isopropyl acrylamide)

In this study, carboxymethyl xylan was synthesized from wheat straw xylan and then pH/temperature dual-responsive hydrogels based on the carboxymethyl xylan (CMX) and poly( N -isopropylacrylamide) (PNIPAm) were firstly synthesized through semi-interpenetrating polymer network synthetic route. The te...

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Bibliographic Details
Published inCellulose (London) Vol. 26; no. 3; pp. 1909 - 1922
Main Authors Sun, Xiao-Feng, Zeng, Qihang, Wang, Haihong, Hao, Yiwei
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Netherlands 15.02.2019
Springer Nature B.V
Subjects
Acrylamide
Biomedical materials
Bioorganic Chemistry
Ceramics
Chemical synthesis
Chemistry
Chemistry and Materials Science
Composites
Drug delivery systems
Glass
Hydrogels
Interpenetrating networks
Isopropylacrylamide
Natural Materials
Organic Chemistry
Original Research
Phase transitions
Physical Chemistry
Polymer Sciences
Porosity
Sensitivity
Straw
Sustainable Development
Swelling
Wheat
Carboxymethyl xylan
Hydrogel
Semi-interpenetrating
Reversible response
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Summary:In this study, carboxymethyl xylan was synthesized from wheat straw xylan and then pH/temperature dual-responsive hydrogels based on the carboxymethyl xylan (CMX) and poly( N -isopropylacrylamide) (PNIPAm) were firstly synthesized through semi-interpenetrating polymer network synthetic route. The temperature-responsive behavior was investigated by swelling experiment and DSC test, showing that the CMX content played an important role in the phase transition, and the CMX–PNIPAm hydrogel had higher pH sensitivity compared with PNIPAm hydrogel. The CMX content and the interconnected pore structure within the network improved the swelling, and the CMX–PNIPAm hydrogels had a high de-swelling rate. Addition of AAc in the hydrogels can improve pH sensitivity but decrease temperature sensitivity. The excellent swelling reversibility in response to temperature was verified through the oscillatory experiments of swelling and de-swelling. It is expected that the CMX–PNIPAm hydrogels could be used in biomedical fields as an intelligent material, especially for drug delivery. Graphical abstract
ISSN:0969-0239
1572-882X
DOI:10.1007/s10570-018-2180-x