瓜尔胶-g-聚丙烯酸/OMMT纳米复合吸水性树脂的制备与表征  

Preparation and characterization of guar gum-g-poly(acrylic acid)/OMMT(GG-g-PAA/OMMT) superabsorbent nanocomposites

作　　者：陈娜丽[1] 冯辉霞[1] 王冰[1] 赵霞[1] 

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050

出　　处：《功能材料》2011年第6期1050-1053,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51063003);甘肃省自然科学基金资助项目(ZS021-A25-028-C;3ZS062-B25-027;3ZS-042-B25-008;0809DJZA011)

摘　　要：以瓜尔胶(GG)、季铵盐改性的蒙脱土(OM-MT)和丙烯酸(AA)为原料,N,N′-亚甲基双丙烯酰胺(MBA)为交联剂,在水溶液中通过接枝聚合反应制备了瓜尔胶-g-聚丙烯酸/OMMT纳米复合吸水性树脂。研究了OMMT的含量、MBA的浓度对产物吸水倍率的影响,考察了OMMT的引入对产物反复溶胀性能的影响。并用傅利叶变换红外光谱(FT-IR)、扫描电镜(SEM)、X射线衍射(XRD)等方法表征了纳米复合吸水性树脂的结构及内部形貌。结果表明,在聚合过程中GG与AA发生了接枝聚合反应;并且OMMT片层被剥离,以纳米尺寸分散在吸水性树脂中。MBA浓度为3mmol/L时,引入5%OMMT不仅可以提高纳米复合吸水性树脂的吸水倍率,而且还可以改善树脂的反复溶胀性能。With the natural guar gum（GG）,montmorillonite modified by cetyl trimethyl ammonium bromide（OMMT） and acrylic acid（AA） as raw materials,N,N＇-methylene bisacrylamide（MBA） as crosslinker agent,novel guar gum-g-poly（acrylic acid）/OMMT superabsorbent nanocomposites were prepared by graft polymerization in aqueous solution.The effects of the content of OMMT and concentration of MBA on the water absorbency of superabsorbent nanocomposites were studied.Reswelling capabilities of the superabsorbent nanocomposites were also investigated.The characterization of superabsorbent nanocomposites was carried out by Fourier transform infrared spectrometry（FT-IR）,scanning electron microscope（SEM） and X-ray diffraction（XRD）.The results showed that GG participated in graft polymerization reaction with AA.The OMMT layers were exfoliated and dispersed in the composite at nano size after the polymerization.The introduced 5% OMMT enhanced the water absorbency of superabsorbent nanocomposites,improved reswelling capability when the concentration of MBA was 3mmol/L.

关 键 词：瓜尔胶 纳米 吸水性树脂 OMMT 吸水倍率 

分 类 号：TB332[一般工业技术—材料科学与工程]