铝交联膨润土复合涂层的制备和导水性能  

Preparation and water-releasing properties of Al crosslinked bentonite composite coating

作　　者：张增志[1] 杨春卫[1] 许海凤[1] 牛俊杰[1] 

机构地区：[1]中国矿业大学(北京)生态功能材料研究所,北京100083

出　　处：《材料研究学报》2008年第5期449-453,共5页Chinese Journal of Materials Research

基　　金：国家自然科学基金50772131;教育部重点基金106086;北京市产学研共建基金ZH114140537资助项目~~

摘　　要：将铝交联膨润土与有机溶剂溶解的EVA混合制备导水复合涂层,测定了纤维在不同温度下的连续失水情况、交联剂对膨润土的修饰效果和材料的孔结构.结果表明,铝离子水解产生多种聚合度交联剂,膨润土经其修饰后层间由单一的规则孔道变为多种杂化孔道,最小孔道是一种尺寸为1.5 nm的板状毛细孔,增大了比表面积,提高了吸附性能.这种结构产生的毛细孔凝聚能实现对水的有效控释.The water-releasing composite coating was prepared by the aluminium crosslinked bentonite and EVA with organic solvent. The releasing rate along the coated fibre at different temperatures was measured by moisture teller. SEM, FT-IR, XRD and N2 adsorption-desorption were employed to characterize the pore structure and test the effect of cross-linking agent. The results show that the hydrolysate of aluminum produces multiple polymerization degree crosslinker, and the single aperture between interlayer of the modified bentonite is changed into hybrid aperture. The surface area of modified bentonite increased, and adsorption capacity is improved. The smallest aperture of the modified bentonite is plate-typed capillary pores with 1.5 nm. This structure can cause capillary condensation, which realizes to transfer water in control.

关 键 词：复合材料 铝交联剂 修饰膨润土 复合涂层 毛细孔凝聚 

分 类 号：S156[农业科学—土壤学]