A STUDY FOR THE FRACTURE MECHANISM OF DOUBLE NETWORK HYDROGELS WITH ULTRA TOUGHNESS
Introduction Living organs perform incredibly well in soft and wet gel-like states. Thus, hydrogels attract much attention as excellent wet materials, as they are suitable for manufacturing artificial organs for medical treatments. The conventional hydrogels, however, are too brittle to be used for such applications. We have recently overcome this problem with an epoch-making discovery; we succeeded in creating double network (DN) hydrogels with an anomalously high mechanical strength1). The DN gels are interpenetrating network (IPN) hydrogels consisting of poly(2-acrylamido-2methylpropanesulfonic acid) gels (PAMPS gels, rigid and brittle) as the first network and polyacrylamide gels (PAAm gels, soft and ductile) as the second network. Although the fracture energy G of the PAMPS gel is approximately 1 J/m2 and that of the PAAm gel is approximately 10 J/m2, G of the DN gel increases anomalously up to a maximum of approximately 2000 J/m2; this is 200 ~ 2000 times higher than that of primary gels.
Tasuku Nakajima Takayuki Kurokawa Hidemitsu Furukawa Yoshimi Tanaka Jian Ping Gong Yoshihito Osada
Graduate School of Science,Hokkaido University,N10W8,Sapporo 060-0810,Japan Riken,Japan
国际会议
International Symposium on Polymer Physics(2008年国际高分子物理学术会议PP2008)
厦门
英文
207-208
2008-06-08（万方平台首次上网日期，不代表论文的发表时间）