为了使PEG-IPDI-PVA水凝胶的温敏性与机械性能得到提高，加入锂藻土纳米填料，利用原位接枝共聚法制备出PEG-IPDI-PVA系列水凝胶。通过红外光谱、扫描电镜对水凝胶的结构和断面形态进行表征，确定了水凝胶的溶胀性能与力学性能。结果表明，随锂藻土的加入溶胀率明显提高，甚至达到700％，说明锂藻土的加入改善了水凝胶的内部结构和物理、化学性能。而在35~40℃时，溶胀率增长迅速，改善了此类材料的温敏性能。
To reinforce the temperature sensitivity and mechanical properties of PEG-IPDI-PVA hydrogels,lapo-nite nano filler was added.PEG-IPDI-PVA hydrogels were prepared by in-situ graft copolymerization.The structure and fracture surface morphology of the hydrogels were analyzed by FT-IR and SEM.The swelling ra-tio and mechanical properties of the hydrogels were also discussed.The results showed that the swelling ratio was significantly increased,even highly up to 700%.The addition of the laponite had great influence on the structure,physical and chemical properties of the hydrogels.From 35 to 40 ℃,the swelling ratio increased rap-idly and showed excellent temperature sensitivity characteristics.
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