漆酚缩甲醛聚合物微球的制备及其吸附性能

本文利用悬浮缩聚的方法合成漆酚缩甲醛聚合物微球,考察悬浮缩聚过程中单体的预分散、分散剂用量、单体的预聚、油水比例、催化剂用量、反应温度以及搅拌速度等对微球的形貌结构与性能的影响。结果表明,漆酚单体经预聚合后,在Mg(OH)2分散剂的作用下分散于甲醛水溶液中;在弱碱催化剂NH3·H2O的作用下,当油水比R=0.163时,搅拌速度r=300r/min时,于80℃～85℃进行悬浮缩聚反应,可以得到粒径为300μm,内部为多孔结构的聚合物微球。微球可以吸附废水中的重金属离子Cu2+、Pb2+和Cd2+等,其吸附选择性为Pb2+(21.9mg/g)Cu2+(21.3mg/g)Cd2+(7.1mg/g)。

Preparation and the Adsorptive Properties of the Micronspheres of Urushiol and Formaldehyde Condensation Polymer

The micronspheres of urushiol and formaldehyde condensation polymer was prepared by suspension condensed polymerization.The effects of monomeric pre-dispersion,dispersant dosage,monomeric pre-polymerization,oil-water ratio,catalyzer dosage,reactive temperature and stirring during suspension condensed polymerization on the microsructrue and the properties were investigated.Results showed that the micronspheres of urushiol and formaldehyde condensation polymer which possessed the average granularity of 300 μm and plenty of holes were synthesized when the ratio of oil and water was 0.163 at the stirring rate of 300 r/min and at the temperature of 80℃~85 ℃.Pre-polymerization,pre-dispersion,dispersant and catalyzer were all helpful to suspension condensed polymerization.The micronspheres could adsorb the ions of heavy metal as copper,lead and cadmium,and the adsorptive selectivity was Pb2+(21.9 mg/g)>Cu2+(21.3mg/g)>Cd2+(7.1mg/g).