摘要
以淀粉为原料、丙烯酸(AA)为接枝单体、N,N′-亚甲基双丙烯酰胺(MBAA)为交联剂、司盘-60/吐温-60为复合乳化剂和环己烷/三氯甲烷为油相,采用反向乳液聚合法合成了淀粉-g-PAA(淀粉接枝聚丙烯酸)水凝胶;然后以自制磁流体对该水凝胶进行功能化改性,并采用分散聚合法制得磁性淀粉-g-PAA水凝胶微球。结果表明:磁性微球对Cu2+的吸附过程可用Lagergren一级吸附动力学方程进行描述;磁性微球对Cu2+的吸附容量随Cu2+浓度增加而增大,并且其吸附容量在Cu2+浓度为50 mg/L时达到24.98 mg/g;磁性微球对Cu2+的吸附容量随pH增加而增大。
With starch as raw material, AA （acrylic acid） as grafting monomer, and MBAA （N,N＇-methylene- bis-acrylamide） as cross linker, Span-60/Tween-60 as composite emulsifier, and cyclohexane/trichloromethane as oil phase, a starch-g-PAA（starch grafted by polyacrylic acid） hydrogel microsphere was synthesized by inverse emulsion polymerization. Then,with self-made magnetic fluid as functional modifier of hydrogel,a magnetic starch-g-PAA hydrogel was prepared by dispersion polymerization. The results showed that the adsorption process of magnetic microspheres on Cu2＋ could be described by Lagergren one-level adsorption kinetic equation. The adsorption capability of magnetic microsphere on Cu2＋ was increased with increasing Cu2＋ concentration,and its adsorption capability was 24.98 mg/g when Cu2＋ concentration was 50 mg/L. The adsorption capability of magnetic microsphere on Cu2＋ was increased with increasing pH.
出处
《中国胶粘剂》
CAS
北大核心
2012年第11期10-14,共5页
China Adhesives
基金
陕西省自然科学基金项目(11JK0571)
咸阳师范学院科研专项基金项目(10xsyk302)
关键词
淀粉
丙烯酸
磁性
微球
吸附
starch
acrylic acid （AA）
magnetic
microsphere
adsorption
