摘要
以氯乙酰化聚苯乙烯微球(PS-acyl-Cl)为大分子引发剂,甲基丙烯酸缩水甘油酯(GMA)和丙烯酰胺(AM)为单体,以原子转移自由基聚合法合成了链状的亲水性环氧聚苯乙烯微球载体(PS-acyl-g-P(AM-GMA)),并与L-苯丙氨酸(LPhe)反应制得一种柔性链状L-Phe树脂。研究了反应时间、原料树脂溶胀时间、溶剂体系、催化剂添加量等对反应的影响。结果表明,随反应时间延长至20 h,增重率增至最大;原料溶胀时间延长至24 h,增重率增至最大;溶剂水较之N,N-二甲基甲酰胺经济且效果好;使用且增加催化剂至20%时,结果最好。在此优化条件下,可得环氧基转化率72%、担载量2.4 mmol/g的L-Phe树脂。研究了L-Phe树脂对Cu2+的吸附,得到最佳条件:Cu2+浓度为100mmol/L,pH为5.8~8.0,饱和吸附时间80 min。树脂最高吸附量为2.0 mmol/g。
The L-Phe resin with flexible chain was synthesized by the reaction of L-phenylalanine （L-Phe） with comb-like and hydrophilic epoxy polystyrene microspheres carrier （PS-acyl-g-p（AM-GMA）） which was prepared by atom transfer radical polymerization （ATRP）, using the chloroacetyl styrene divinylbenzene copolymer microspheres （PS-cyl-Cl） as the initiator, acrylamide （AM） and glycidyl methacrylate （GMA） as monomer. Several factors were discussed and optimized during the reaction, such as reaction time, swelling time of raw resin, solvent system, the amount of catalyst. The final optimum conditions obtained are as follows： with the reaction time extending to 20 h and the swelling time of raw resin to 24 h, the maximum rate of mass gain was achieved; using water as solvent, the better economic result was obtained than using DMF as solvent; with n（catalyst） increasing to 20% of n（epoxy resin）, the result was the best. Under the above condition, the conversion rate and maximum loading of L-Phe can be up to 72% and 2.4 mmol/g, respectively. The optimum conditions for the adsorption of Cu2＋ with the L-Phe resin with flexible chain as follows： solution concentration of Cu2＋ 100 mmol/L, pH 5.8 to 8.0,the adsorption time 80 min i.e. reaches saturation. The maximum amount of adsorption of the resin is up to 2.0 mmol/g.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2014年第3期6-10,共5页
Polymer Materials Science & Engineering
基金
"973"项目(2013CB733504)
"863"项目(2012AA021203)
