氧化石墨烯增强聚丙烯酰胺水凝胶的力学性能

Mechanical Properties of Graphene Oxide Enhanced Polyacrylamide Hydrogels

以丙烯酰胺为单体,氧化石墨烯为交联介质制备了聚丙烯酰胺/氧化石墨烯复合水凝胶,采用热重分析、X射线衍射、傅里叶红外光谱和扫描电镜对其结构和形貌进行了表征,并测试其溶胀性能和力学性能。结果表明,当GO含量从0%增加至3%时,溶胀率从26.6%减至22.2%;GO含量在0.3%~3.5%范围内,聚丙烯酰胺/氧化石墨烯复合水凝胶具有弹性,断裂伸长率可达1320%,且加入GO后可有效改善丙烯酰胺凝胶受外力易碎的情况,表明聚丙烯酰胺/氧化石墨烯复合水凝胶具有较好的弹性及可恢复性。

Acrylamide/graphene oxide composite hydrogels were prepared by radical polymerization with acrylamide as monomer and graphene oxide as cross-linking. The structure and morphology of composite hydrogel were characterized by thermogravime-tric analysis(TGA), X-ray diffraction(XRD), Fourier transform infrared spectroscopy(FT-IR) and scanning electron microscope(SEM). The swelling properties and the mechanical properties of complex hydrogels were also tested. The results show that the swelling ratio of complex hydrogels is reduced from 26.6% to 22.2% with the content of graphene oxide rising from 0% to 3%. When the content of graphene oxide is between 0.3%~3.5%, the composite hydrogels are elastic, and the elongation at break is up to 1320%, meanwhile the fragile condition of acrylamide gels is improved. Those results indicate that the acrylamide/graphene oxide composite hydrogels have preferable elasticity and recoverability.