混合盐溶液中KLPAAM复合高吸水树脂吸液性能的研究  

Absorbencies of KLPAAM superabsorbents composites in multiple component salt-mixing solutions

作　　者：谢建军[1] 何新建[1] 张绘营[1] 黄凯[1] 韩心强[1] 

机构地区：[1]中南林业科技大学材料科学与工程学院,湖南长沙410004

出　　处：《中南林业科技大学学报》2010年第10期107-111,共5页Journal of Central South University of Forestry & Technology

基　　金：湖南省自然科学重点基金资助项目(07JJ3109);国家留学回国人员基金项目;湖南省科技厅科技攻关项目(2008GK3092)

摘　　要：采用自制高岭土/木质素磺酸盐接枝丙烯酰-丙烯酸复合高吸水树脂(KLPAAM),室温下测定了一元、二元及多元混合盐溶液中的吸液性能,蒸馏水和0.9%NaCl溶液中的平衡吸液倍率分别为1 003 g/g及89 g/g;pH约为6.5时在溶液离子强度为0.1的多元混合盐溶液中的吸液倍率在前30 min随吸液时间增大迅速增加,50min左右时达到最大,然后缓慢下降,最后趋近稳定。同时,KLPAAM复合高吸水树脂在多元混合盐溶液中的平衡吸液倍率顺序为:1#>2#>4#>3#>5#>7#>6#>8#,且1#、2#、3#、4#溶液中平衡吸液倍率基本相同。吸液初期(t<60 min)各盐溶液中吸液倍率与时间的关系不符合二级动力学方程:dQ/dt=kQ(Qeq-Q)2。The absorbencies of the kaolin/sodium lignosulfonate graft acrylic acid and acrylamide superabsorbents composites（KLPAAM） in unary,binary and multiple salt-mixing solutions were measured by using self-made KLPAAM.The balance absorbency of KLPAAM in distilled water and 0.9% NaCl aqueous solution were 1 003 g/g and 89 g/g respectively.And with pH≈6.5,ionic strength of each solution（I= 0.1） for the multiple salt-mixing solutions,the absorbencies increased fast with an increase of imbibing time before the initial time（t 〈30 minutes）,reached respective maximum values at about 50 minutes,then decreased slowly and at last tended to respective equilibrium values.The sequence of the equilibrium absorbencies in turn was 1#〉2#〉4#〉3#〉5#〉7#〉6#〉8#;and the absorbencies were almost equal in solution 1#,2#,3#,4#.The absorbencies in initial time（t 〈60 minutes） did not agree with the second-class kinetics equation：dQ/dt=kQ（Qeq-Q）^2..

关 键 词：木质素 复合高吸水树脂 溶液聚合 吸液性能 高岭土 混合盐溶液 

分 类 号：TB34[一般工业技术—材料科学与工程] O63[理学—高分子化学]