聚丙烯酰胺/凹凸棒土(Attapulgite)纳米复合高吸水性树脂的制备与性能

高吸水性树脂是一种新型功能高分子材料，由于其优越的吸水保水性能，已在农林园艺和生理卫生用品等领域得到了应用，但它仍然存在抗盐性能差、吸水后凝胶强度低等不足．近年来，有机．无机复合高吸水性树脂因具有较高的吸水性能和低廉的生产成本而受到了广泛的关注，使用的无机粘土主要有高岭土、蒙脱土和凹凸棒土等．粘土具有活性基团和键合点，加入到高吸水性树脂三维网络中可以改善树脂的网络结构，提高其综合性能．凹凸棒土是一种含水富镁铝的层链状硅酸盐，相对于其它粘土，它具有很好的抗盐、吸附和胶体性能。

PREPARATION AND PROPERTIES OF POLYACRYLAMIDE/ATTAPULGITE SUPERABSORBENT NANOCOMPOSITES

Organo-attapulgite was obtained by modifying attapulgite with hexadecyltrimethyl ammonium bromide.A new organo-attapulgite based superabsorbent composite was prepared by polymerization of organo-attapulgite dispersed acrylamide,using N,N′-methylenebisacrylamide as a crosslinker and ammonium persulfate as an initiator.The structure,morphology,thermal stability of organo-attapulgite and the composite were characterized by FTIR,XRD,SEM,TEM and TGA,respectively.The results indicated that a nanocomposite was successfully obtained after incorporating organo-attapulgite into the polyacrylamide network.The thermal stability and water absorbency of the nanocomposite were improved greatly after the organification of attapulgite.Water absorbencies for the nanocomposite incorporated with 10 wt% HDTMA-APT in distilled water and in a 0.9 wt% NaCl solution were 2803 g g -1 and 121 g g -1,respectively.