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通过离子交换反应先将钙基膨润土交换成钠基膨润土,继而交换成镍基膨润土,然后将丙烯酰胺配位插层进入镍基膨润土层间,于353K条件下使用硝酸铈铵作引发剂,使丙烯酰胺在膨润土中配位插层聚合5h制备出一种新型的聚丙烯酰胺/膨润土复合调湿材料。XRD分析结果表明,丙烯酰胺于338K条件下在膨润土中配位插层12h后,镍基膨润土的层间距从1.607nm增至2.079nm;同时,还通过IR分析对钙基膨润土和聚丙烯酰胺/膨润土复合物进行了表征。通过对不同膨润土含量的调湿材料调湿性能的测试表明:随着复合物中膨润土含量的增加,复合物的吸湿量和吸湿速率降低,放湿速率增加。
First by ion exchange reaction of calcium bentonite exchanged into sodium bentonite, and then exchanged into nickel-based bentonite, and then acrylamide coordination intercalated nickel-bentonite layer at 353K conditions using ceric ammonium nitrate as the initiator, Acrylamide in bentonite coordination intercalation polymerization 5h to prepare a new type of polyacrylamide / bentonite composite humidity control materials. XRD results showed that the interlamellar spacing of nickel-based bentonite increased from 1.607nm to 2.079nm after the acrylamide complexed in bentonite at 338K for 12h. Meanwhile, the intercalation of calcium bentonite and polyacrylamide / Bentonite composites were characterized. The tests on the humidity-controlling properties of humidity-controlling materials with different bentonite contents show that with the increase of bentonite content in the composites, the moisture absorption rate and moisture absorption rate of the composites decrease and the moisture release rate increases.