摘要
以大分子引发剂氯乙酰化聚苯乙烯微球(PS-acyl-Cl)经原子转移自由基聚合(ATRP)法引发丙烯酰胺(AM)和甲基丙烯酸缩水甘油酯(GMA)单体的共聚接枝,制得一种触角状亲水性环氧载体(PS-acyl-g-P(AM-co-GMA)),再经二乙醇胺(DEA)的环氧基开环胺化反应,得到一种含多个-NCH2CH2OH螯合配基的多齿-五元螯合环的触角状亲水性羟胺树脂(PS-acyl-g-P(AM-co-GMA)-DEA)。将此树脂用于硼吸附研究,结果表明,PS-acyl-g-P(AM-co-GMA)-DEA树脂对硼的吸附满足Langmuir方程,为单分子层吸附;饱和吸附量约为37.7 mg·g-1,且树脂5 min即可达到吸附平衡,与其它已报道的吸硼树脂相比,该树脂具有更高的吸附量和吸硼速率。吸附动力学研究表明,树脂吸附硼的过程主要由颗粒扩散过程控制。重复使用5次后该树脂的吸附量基本不变,解吸率均在90%以上,重复使用性能良好。
The mixed monomers of acrylamide （AM） and glycidyl methacrylate （GMA） were successfully grafted onto the chloroacetyl Poly （styrene-divinylbenzene） （PS-acyl-C1） microsphere via atom transfer radical polymerization （ATRP） to prepare hydrophilic tentacular epoxy microspheres （PS-acyl-g-P（AM-co-GMA））. Diethanolamine （DEA） reacted with the epoxy of the carrier by ring-opening reaction, and the polydentate five-ring hydroxylamine chelating resin （PS-acyl-g-P（AM-co-GMA）-DEA） was prepared successfully. The adsorption of boron with the chelating resin was studied. Results showed that the adsorption of the resin can be described with the Langmuir equation and belongs to the monolayer adsorption. The maximum adsorption capacity of boron is about 37.7mg.g-1 and the adsorption equilibrium can be obtained within 5min. Compared with other boron adsorption resins, PS-acyl-g-P（AM-co-GMA）-DEA has higher adsorption capacity and adsorption rate. Kinetic studies show that the adsorption of resin is mainly decided by the boron diffusion of the particles. After five adsorption/desorption cycles, the resin adsorption capacity remain stable and the desorption rate is above 90%.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2014年第6期1328-1333,共6页
Journal of Chemical Engineering of Chinese Universities
基金
"973"计划项目(2013CB733504)
"863"计划项目(2012AA021203)
关键词
氯乙酰化聚苯乙烯微球
触角状亲水性环氧载体
触角状亲水性羟胺树脂
吸硼树脂
吸附动力学
chloroacetylated polystyrene microsphere
tentacular hydrophilic epoxy resin
tentacular hydrophilic hydroxylamine resin
boron adsorption resin
adsorption kinetics
