第 50 卷第 5 期 Vol. 50 No. 5 2020 年 10 月 Oct 2020

所属栏目：功能材料 纳米二氧化硅改性的两性离子星形丙烯酰胺共聚物

罗瑞峰1，陈美鑫1，张德兰2，杨继华1，阳 静1，李妍赫1，杜玉桥3，王 玲1* （1. 东北石油大学 化学化工学院，黑龙江 大庆 163318；2. 大庆油田有限责任公司 采油工程研究院，黑龙江 大庆163318；3. 大港油田石油工程研究院，天津 300280）

摘　要：以丙烯酰胺（AM）、N，N-二甲基-N-甲基丙烯酰胺基丙基-N，N-二甲基-N-丙磺酸盐（DMMPPS）和改性纳米二氧化硅（NSFM）为单体，通过单电子转移活性自由基聚合（SET-LRP）法合成了纳米二氧化硅改性的两性离子星形丙烯酰胺共聚物P（AM-co-DMMPPS-co-NSFM）。利用正交实验确定了优化反应条件为：聚合反应的物料比为n（AM）∶n（DMMPPS）∶n（Gly-Br3）∶n（CuBr）∶n（Me6TREN）=2660.0∶140.0∶1.0∶2.5∶11.2，AM和DMMPPS总浓度为3.5 mol·L-1。在正交实验基础上，利用单因素实验得到NSFM的质量分数为0.5%。通过红外光谱、核磁共振氢谱，证实所得星形聚合物为目标产物，NSFM参与SET-LRP反应。两性离子星形共聚物溶液性质研究表明，当剪切速率超过临界值（100 S-1）时，AM／DMMPPS／NSFM表现出剪切增稠；当盐浓度增大时，AM／DMMPPS／NSFM的特性粘数随之增大，具有反聚电解质溶液行为。实验还发现，AM／DMMPPS／NSFM表现出较好的耐温能力。

关键词：两性离子聚合物；反聚电解质溶液行为；纳米二氧化硅；剪切增稠；单电子转移活性自由基聚合；星形共聚物

中图分类号：0631　　文献标识码：A　　文章编号：1009-9212（2020）05-0049-08

Synthesis of a Zwitterionic Star-shaped Acrylamide Copolymer Modified by Nano-SiO2

LUO Rui-feng1,CHEN Mei-xin1,ZHANG De-lan2,YANG Ji-hua1,YANG Jing1,LI Yan-he1, DU Yu-qiao3，WANG Ling1* (1. Chemistry and Chemical Engineering College of Northeast Petroleum University, Daqing 163318, China;2. Daqing Oilfield Production Technology Institute of Daqing Oilfield Limited Company, Daqing 163318, China; 3. Petroleum Engineering Research Institute of Petro China Dagang Oilfield Company, Tianjin 300280, China0

Abstract：The synthesis of a zwitterionic star-shaped copolymer (AM-co-DMMPPS-co-SiO2) with anti-polyelectrolyte behavior containing AM, DMMPPS and NSFM was achieved by SET-LRP in aqueous solution. The effects of total monomer concentration, initiator amount, monomer molar ratio, catalyst amount and ligand amount on the polymerization were determined by orthogonal experiments. The optimum polymerization conditions were established through experiments as the followings: a ratio of n(AM)∶n(DMMPPS)∶n(Gly-Br3)∶n(CuBr)∶n(Me6TREN) =2660.0∶140.0∶1∶2.5∶11.2, a total concentration of [AM]+[DMMPPS] was 3.5 mol·L-1. On the basis of orthogonal experiment, the optimum dosage of NSFM was 0.5% of monomers by single factor experiment. The prepared acrylamide copolymers have been characterized by FTIR spectroscopy, 1H NMR spectrometry, which confirmed the star-shaped polymer was the target product and NSFM participated in the single electron transfer radical polymerization. The solution properties of zwitterionic star polymers showed that the star-shaped copolymer exhibited a shear thickening property when the shear rate exceeded a critical value of 100 S-1. With the increasing of salt concentration, the intrinsic viscosity of AM/DMMPPS/NSFM increased, which had the effect of antipolyelectrolyte solution. It was also found that AM/DMMPPS/NSFM exhibited good temperature resistance.

Key words：zwitterionic polymers; anti-polyelectrolyte solution behavior; nano-SiO2; shear thickening propertys; single electron transfer living radical polymerization; star-shaped copolymer

基金项目：国家自然科学基金项目（51474068），国家自然科学基金重点基金项目（51834005），黑龙江省大学生创新创业训练项目（201910220054），东北石油大学校培育基金项目（5xm123442）

作者简介：罗瑞峰（2000—），男，湖南长沙人，研究方向：高分子化学，活性自由基聚合（E-mail：ruifeng_luo@163.com）。

联 系 人：王 玲，讲师（E-mail：wang.ling.1014@163.com）。

收稿日期：2020-06-06