纤维素纳米纤维接枝聚丙烯酸pH响应水凝胶的制备及性能<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.018.012

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Abstract Cellulose-g-PAA nanofiber hydrogels with pH-responsive were synthesized by graft copolymerization of pH-responsive polyacrylic acid (PAA) on to electrospun cellulose nanofibrous membranes with ammonium ceric nitrate as initiator. The effect of m(N)/m(c) on the morphology, grafting rate and swelling rate of cell-g-PAA nanofiber hydrogels were investigated. The results showed that the grafting rate of cell-g-PAA nanofiber hydrogels rapidly increased from 11% to 28% with increasing m(N)/m(c) from 5 to 10, and then leveled off. The swelling rate of cell-g-PAA nanofiber hydrogels increased from (15.2±1.6) g/g to (46.1±4.9) g/g with increasing m(N)/m(c) from 5 to 15, and then decreased. The effect of pH and ionic strength on the swelling rate of hydrogels were investigated. When the pH value changed from 2.2 to 7.8, the swelling rate increased from (31.3±2.5) g/g to (42.7±3.2) g/g, and then decreased. Moreover, the swelling rate decreased from (36.2±2.6) g/g to (21.4±1.4) g/g when ionic strength increased from 0 mol/L to 0.15 mol/L. This research provides a new approach to fabricate hydrogels with great sensitivity to pH value.

Key words： cellulose polyacrylic acid grafting pH-responsive hydrogels

Published: 08 May 2018

CLC number:

O631.2

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	Articles by authors
	LIN Hao
	HU Jiapeng
	LIU Ruilai
	RAO Ruiye

Cite this article:

LIN Hao,HU Jiapeng,LIU Ruilai, et al. Synthesis and Properties of pH-responsive Cellulose-g-PAA Nanofiber Hydrogels[J]. Materials Reports, 2017, 31(18): 55-58.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.018.012 OR http://www.mater-rep.com/EN/Y2017/V31/I18/55

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