Chinese Journal of Tissue Engineering Research ›› 2012, Vol. 16 ›› Issue (21): 3919-3923.doi: 10.3969/j.issn.1673-8225.2012.21.028

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Preparation and characterization of poly(vinyl alcohol-g-acrylamide) hydrogel

Shi Lin-feng   

  1. School of Polymer, Wangjiang Campus of Sichuan University, Chengdu  610064, Sichuan Province, China
  • Received:2012-02-23 Revised:2012-03-14 Online:2012-05-20 Published:2012-05-20
  • About author:Shi Lin-feng★, Studying for master’s degree, School of Polymer, Wangjiang Campus of Sichuan University, Chengdu 610064, Sichuan Province, China shijiazhijuechang@163.com

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Abstract:

BACKGROUND: Cross-linking gels are prepared by interpenetrating networking, which are formed by polymeric chains. But hydrogel, got in this way, cannot be good at their properties of physics and transmittance.
OBJECTIVE: To prepare poly(vinyl alcohol-g-acrylamide) hydrogel (PVA-g-PAM) via radical copolymerization.
METHODS: We carried out the graft polymerization of acryl amide (AM) onto poly(vinyl alcohol) (PVA), which was to be the backbone. Factors affecting the grafting yield, such as temperature, time, monomer ratio, and initiator dose, were investigated. The chemical structure of grafted copolymers was verified with Fourier transform infrared spectroscopy (FTIR).
RESULTS AND DISCUSSION: We got the way, most efficient, according to the graft copolymerization: the initiator concentration was 0.04 mol/L, ratio of AM/PVA (hydroxyl) was 6/1, temperature was 40 ℃, and reaction time was 4 hours. It was confirmed that the copolymerization of PVA and AM happened by FTIR; and the PVA-g-PAM hydrogel exhibited obvious thermal sensitivity, which was observed from the swelling ratio.

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