Thermal responsive hydrogels based on semi interpenetrating network of poly(NIPAm) and cellulose nanowhiskers

被引：122

作者：

Hebeish, A. ^{[1
]}

Farag, S. ^{[1
]}

Sharaf, S. ^{[1
]}

Shaheen, Th I. ^{[1
]}

机构：

[1] Natl Res Ctr, Text Res Div, Cairo, Egypt

来源：

CARBOHYDRATE POLYMERS | 2014年 / 102卷

关键词：

Cellulose nanowhiskers; Interpenetrating network; Poly(N-Isopropyl Acrylamide); Cross linking and Thermal responsive hydrogels; THERMOSENSITIVE GRAFT COPOLYMER; SENSITIVE HYDROGEL; DRUG-DELIVERY; NANOCOMPOSITES; WHISKERS; ACID;

D O I：

10.1016/j.carbpol.2013.10.054

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A hybrid hydrogel nanocomposite was developed based on semi interpenetrating network that was formed as a result of concurrent free radical polymerization of N-isopropylacrylamide (NIPAm) and methylenebis acrylamide (MBA) crosslinker along with cellulose nanowhiskers (CNWs). CNWs were synthesized through sulfuric acid hydrolysis and used in preparation of semi interpenetrating network (IPN). CNWs have considered as reinforcement materials for poly(NIPAm) because CNWs were distributed as strengthening entities in Poly(NIPAm). N-isopropylacrylamide was polymerized in presence of methylenebis acrylamide crosslinking agent using K2S208 as initiator at 700 degrees C for 1 h. The resulting hydrogel's structure, morphology, thermal sensitive property and swelling behavior were investigated. It was found that introducing CNWs into Poly(NIPAm) causes a huge increase in the value of equilibrium swelling ratio (ESR) as compared with the pure PNIPAm. The ESR ranges from 21.6 g/g to 5 g/g as the swelling temperature changes from 310 C to 340 degrees C; hence, the hydrogel exhibits a good responsive temperature at about 320 degrees C. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：159 / 166

页数：8

共 38 条

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