纤维素均相接枝丙烯酸球形吸附剂的制备与性能

以离子液体1-烯丙基-3-甲基氯代咪唑（AMIM] CI）为反应介质,采用丙烯酸为单体,过硫酸铵为引发剂,N,N＇-亚甲基双丙烯酰胺为交联剂,利用接枝共聚方法合成纤维素-丙烯酸接枝共聚物.以轻液体石蜡为分散相,经反相悬浮过程将接枝物球化.通过正交实验法探索了最佳合成条件：单体的用量为4g/g CE,引发剂的用量为0.15g/g CE,交联剂的用量为0.05g/g CE,反应温度为60℃,反应时间为1.5h.采用傅里叶变换红外光谱（FT-IR）、透射电子显微镜（TEM）、热重分析仪对纤维素-丙烯酸接枝共聚物进行了表征.结果表明,聚合物微球对Cu＋2离子有较好的吸附效果,最佳吸附量为198.6 mg/g.

The preparation and performance of spherical cellulose adsorbent using graft copolymerization method in homogeneous system

Acrylic acid was grafted onto cellulose respectively in ionic liquids （ AMIM ] C1） using ammonium persulfate as an initiator in the presence of N, N＇-methylenebisacrylamide as a crosslinker by graft copolymerization method. The spherical polymer was obtained by using light liquid paraffin as the dispersed phase by an inverse suspen- sion polymerization technique. The optimum synthetic conditions were got by orthogonal experimental design：amount of monomer was 4g/g CE;dosage of initiator was O. 15g/g CE;dosage of crosslinker was 0. 05g/g CE;reaction temperature was 60~（] ;and reaction time was 1.5h. The structure of the graft copolymer was confil~ned by FT-IR spectrum, transmis- sion electron microscopy , thermogravimetric analyzer. The adsorption properties for metal ions of the polymer micro- spheres were studied. Results show that polymer microsphere is an effective metal ion adsorbent for CuE＋ and the maximum adsorption capacity is 198.6 mg/g.