Formation of a strong hydrogel-porous solid interface via the double-network principle.

Kurokawa, Takayuki; Furukawa, Hidemitsu; Wang, Wei; Tanaka, Yoshimi; Gong, Jian Ping · Acta Biomater · 2010

biomechanical · Level V

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Abstract

A method for binding a tough double-network (DN) hydrogel and a porous solid utilizing the double-network principle is proposed. The effects of the pore size of the solid and the structure of the DN gel in the pores on bonding strength were investigated by a peeling test. Porous solids with pore sizes of the order of several microns afforded strong gel-substrate interfaces. Under optimal conditions a bonding strength as high as approximately 1000 Nm(-1) was reached. The results obtained were compared with the strength of the bulk DN gel, and discussed in terms of the double-network principle at the bonding interface.

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