气溶胶固定剂PAM-b-PVTES的合成及表征  

Synthesis and characterization of aerosol fixative PAM-b-PVTES

作　　者：卢彦志 刘峰 詹杰 苏兴东 李家文 李银涛 LU Yanzhi;LIU Feng;ZHAN Jie;SU Xingdong;LI Jiawen;LI Yintao(State Key Laboratory of Environmentally-Friendly Energy Materials,Southwest University of Science and Technology,Mianyang 621000,Sichuan,China;CGN Research Institute Co.,Ltd.,Shenzhen 518000,Guangdong,China)

机构地区：[1]西南科技大学环境友好能源材料国家重点实验室,四川绵阳621000 [2]中广核研究院有限公司,广东深圳518000

出　　处：《精细化工》2022年第4期806-811,836,共7页Fine Chemicals

基　　金：国家自然科学基金(11zg2119)。

摘　　要：以S,S-二苄基三硫代碳酸酯(DBTTC)为链转移剂,丙烯酰胺(AM)为第一单体,乙烯基三乙氧基硅烷(VTES)为第二单体,通过可逆加成-断裂链转移聚合(RAFT)制备了一系列两亲嵌段共聚物(PAM-b-PVTES)。通过FTIR、1HNMR、DSC、GPC对样品进行了表征。考察共聚物水溶液作为气溶胶固定剂对PTI-A2实验粉尘作为模拟气溶胶的去除性能。结果表明,VTES的引入有效地降低了共聚物水溶液的表面张力,表面张力降低至40.44 mN/m,共聚物水溶液与PTI-A2实验粉尘的接触角降低至11.9°。随着链转移剂用量的减少,共聚物相对分子质量逐渐增加,共聚物水溶液的黏度也逐渐增加,黏度从3.7m Pa·s逐渐升高到8.1m Pa·s。气溶胶沉降固定实验表明,PAM-b-PVTES对PTI-A2实验粉尘的沉降固定效率为91.04%。A series of amphiphilic block copolymers(PAM-b-PVTES)were synthesized using S,S-dibenzyl trithiocarbonate(DBTTC)as chain transfer agent,acrylamide(AM)as the first monomer and vinyltriethoxysilane(VTES)as the second monomer by reversible addition-fragmentation chain transfer(RAFT)polymerization.The samples were characterized by FTIR,1HNMR,DSC and GPC.The removal performance of the aqueous solution of copolymer as aerosol fixative on PTI-A2 experimental dust as simulated aerosol was investigated.The results showed that the introduction of VTES effectively reduced the surface tension of copolymer aqueous solution to 40.44 m N/m,and the contact angle between copolymer aqueous solution and PTI-A2 experimental dust was reduced to 11.9°.With the decrease of the amount of chain transfer agent,the relative molecular mass of copolymer gradually increased,and the viscosity of copolymer aqueous solution gradually increased from 3.7 mPa·s to 8.1 mPa·s.The experimental results of aerosol settling and fixation indicated that the settling and fixing efficiency of PTI-A2 experimental dust was 91.04%.

关 键 词：气溶胶 可逆加成-断裂链转移 两亲嵌段共聚物 表面张力 黏度 气溶胶固定剂 环境保护 

分 类 号：X513[环境科学与工程—环境工程] TQ317[化学工程—高聚物工业]