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以木质素磺酸钠为原料,利用反相悬浮聚合技术,成功制备木质素基树脂。研究了木质素基树脂的制备工艺及其对重金属离子Pb2+、Cd2+的吸附性能。结果表明,优化的聚合条件为:液体石蜡与反应水溶液的相比为3∶1、分散剂占有机相百分含量为2%、温度为90℃、盐酸浓度为3mo1/L、甲醛占木质素磺酸钠百分含量为9%、聚合时间为2h。30℃时,所制备的树脂对Pb2+、Cd2+的饱和吸附量分别达到33.6523mg/g和30.12mg/g。所制备的木质素基树脂有大量羟基和磺酸基等含氧基团存在,非常有利于它对重金属离子的吸附。木质素基树脂的比表面积为0.0963m2/g,孔容为0.002389cm3/g,平均孔径为99.2208nm,表明该树脂具有大孔树脂的结构特点。
Using lignin sulfonate as raw material, lignin-based resin was successfully prepared by reversed-phase suspension polymerization. The preparation technology of lignin-based resin and its adsorption of heavy metal ions Pb2 + and Cd2 + were studied. The results showed that the optimized polymerization conditions were as follows: the ratio of liquid paraffin to the reaction solution was 3: 1, the dispersant accounted for 2% of the organic phase, the temperature was 90 ℃, the concentration of hydrochloric acid was 3mo1 / L, Sulfonate percentage of 9%, polymerization time of 2h. At 30 ℃, the saturated adsorption capacity of Pb2 + and Cd2 + was 33.6523mg / g and 30.12mg / g, respectively. The prepared lignin-based resin has a large number of hydroxyl groups and sulfonic acid groups and other oxygen-containing groups exist, is very conducive to its adsorption of heavy metal ions. The specific surface area of lignin-based resin was 0.0963m2 / g, the pore volume was 0.002389cm3 / g and the average pore size was 99.2208nm, which indicated that the resin had the structural characteristics of macroporous resin.