期刊
CARBOHYDRATE POLYMERS
卷 147, 期 -, 页码 201-207出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2016.04.015
关键词
Cellulose nanofibers; Poly(N-isopropylacrylamide); Morphology; Swelling behaviors; Compression properties
资金
- National Natural Science Foundation of China [31370568]
- Public Welfare Projects of Zhejiang Province [2016C33029]
- Scientific Research Foundation of Zhejiang Agricultural and Forestry University [2013FR088]
- New-shoot Talents Program of Zhejiang province [2015R412046]
In this study, TEMPO-oxidized bamboo cellulose nanofibers (TO-CNF) with anionic carboxylate groups on the surfaces were in-situ incorporated into poly(N-isopropylacrylamide) (PNIPAm) matrix to improve its thermo-responsive and mechanical properties during the polymerization. The microstructure, swelling behaviors, and compressive strength of resultant PNIPAm composite hydrogels with varying contents of TO-CNFs (0-10 wt%) were then examined, respectively. Modified hydrogels exhibited the similar light transparency to pure PNIPAm one due to the formation of semi-IPN structure between PNIPAm and TO-CNF. FT-IR spectra demonstrated that the presence of TO-CNF did not alter the position of characteristic peaks associated with PNIPAm. SEM observation suggested that the pore size of PNIPAm hydrogels was markedly increased after the incorporation of TO-CNF. Also, the composite hydrogels showed superior swelling behavior and much improved compression properties with respect to pure PNIPAm one. Thus, TO-CNF appeared to be a green nanofiller that can simultaneously improve swelling and mechanical properties of PNIPAm hydrogel. (C) 2016 Elsevier Ltd. All rights reserved.
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