利用高温快速反应法成功制备了聚丙烯酸/蒙脱土高吸水性纳米复合材料.考察了交联剂质量分数对纳米复合材料吸水倍率的影响规律,并利用SEM等表征发现,当交联荆用量为0.225%时,可获得很好的结果,所得纳米复合材料吸水倍率为372 mL/g.在20℃～70℃的范围,研究了聚丙烯酸/蒙脱土纳米复合材料的保水行为动力学.结果表明,20℃时聚丙烯酸/蒙脱土10 g水凝胶干燥时间为128 h,在高温条件下该复合材料仍具有优异的保水性能;其保水过程为零级反应;复合材料保水反应的反应速率常数为k=3.7967X107 exp(-Ea/RT),其保水过程的表观活化能E=43.19kJ/mol.
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