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利用前端聚合结合发泡工艺制备了孔结构可调控的聚丙烯酰胺多孔水凝胶.研究发现溶剂和引发剂浓度变化对聚合前端的移动及形成的产物性能有重要影响.增加溶剂用量,聚合前端的移动速度和聚合前端最高温度下降,产物孔径增大,孔壁变厚,材料吸水溶胀性能降低;增加引发剂浓度,聚合前端移动速度显著加快,最高温度升高,产物的孔体积和溶胀率先增加后减小.
Porous polyacrylamide hydrogels with controlled pore structure were prepared by the front-end polymerization combined with foaming process.The results showed that the concentration of solvent and initiator had an important effect on the movement of the polymer front and the product properties of the polymer.It was found that the amount of solvent, And the maximum temperature of the polymer front end decreased, the product pore diameter increased, the pore wall became thick and the water absorption and swelling properties of the material decreased. Increasing the initiator concentration accelerated the movement speed of the front end of the polymer and the maximum temperature increased. The pore volume and swelling rate Increase and decrease.