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Synthesis and properties of poly(acrylamide‐ co ‐acrylic acid)/polyacrylamide superporous IPN hydrogels
Author(s) -
Ao Haiyong,
Huang Miaoliang,
Wu Jihuai,
Lin Jianming,
Tang Qunwei,
Sun Hui
Publication year - 2009
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1361
Subject(s) - swelling , self healing hydrogels , materials science , acrylic acid , acrylamide , polyacrylamide , polymerization , compressive strength , chemical engineering , polymer chemistry , scanning electron microscope , oligomer , composite material , copolymer , polymer , engineering
Poly(acrylamide‐ co ‐acrylic acid)/polyacrylamide [P(AM‐ co ‐AA)/PAM] hydrogel with superporous and interpenetrating network (IPN) structure was prepared by a prepolymerization reaction and a synchronous polymerization reaction and frothing process. Scanning electron microscope (SEM) images show that the resultant hydrogel possesses abundant interconnected pores. DSC indicates that the porous structure enhances the swelling ratio and reduces the interaction between water and the hydrogel. In contrast, the IPN by PAM decreases water absorbency and enhances water retentivity. It is found that a superporous stucture in the hydrogel increases the equilibrium swelling ratio and decreases the compressive strength of the hydrogel. On the other hand, the increase in AM oligomer (oligo‐AM) amount decreases the equilibrium swelling ratio and improves the compressive strength of the hydrogel. Therefore, the two‐steps synthesis method can be used to construct a hydrogel with superporous and IPN structure. The swelling and mechanical properties of the hydrogel can be improved effectively. Copyright © 2008 John Wiley & Sons, Ltd.