摘要
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。
The Ca^(2+)-bentonite was converted to Na^+-bentonite and subsequent to Ni^(2+) form using the cation exchange reaction of bentonites and cation solution, and a new type of humidity-controlling membrane of PAM/bentonite was prepared by the intercalation of acrylamide into the interlayer of Ni^(2+)-bentonite and followed by polymerization at 353K for 5 hours with ceric ammonium nitrate as initiator. After the intercalation of acrylamide into the interlayer of Ni^(2+)-bentonite at 338K for 12 hours, the interlamellar distance of Ni^(2+)-bentonites increased from 1.607nm to 2.079nm by XRD analysis. The cation exchanged bentonite and PAM/bentonite composite were also characterized by FTIR analysis. Meantime, The humidity-controlling properties of the composites in different bentonite contents were also investigated. It showed that with the increase of the bentonite content, the moisture absorption amount and moisture absorption rate of the composite decrease, while the moisture release rate increases.
出处
《陕西科技大学学报（自然科学版）》
2004年第1期1-5,共5页
Journal of Shaanxi University of Science & Technology
