耐温抗盐聚丙烯酰胺纳米微球的合成  

Synthesis of Temperature and Salt Resistant Polyacrylamide Nanoparticles

作　　者：刘彭城 李杰 陈建波[1] LIU Peng-cheng;LI Jie;CHEN Jian-bo(Anhui Tianrun Chemical Industry Co.Ltd.,Bengbu 233010,China)

机构地区：[1]安徽天润化学工业股份有限公司,安徽蚌埠233000

出　　处：《安徽化工》2022年第3期88-90,94,共4页Anhui Chemical Industry

摘　　要：以丙烯酰胺(AM)与丙烯酸(AA)为聚合单体,N,N-亚甲基双丙烯酰胺(MBA)为交联剂,煤油为油溶性溶剂,Span 80/Tween 80为复配乳化剂,采用氧化还原引发剂体系(过硫酸铵/亚硫酸氢钠),通过反相微乳液聚合的方式制备出耐温抗盐聚丙烯酰胺纳米微球。依据聚合反应过程中的反应现象,对反相微乳液聚合反应的各组分质量分数、聚合反应起始温度、聚合反应搅拌速度、氧化还原引发剂用量等条件进行优化。根据优化后的条件设计反相微乳液聚合反应,并对合成的聚丙烯酰胺微球的粒径和高温高盐下的膨胀倍数进行测试。最佳反应条件:反相微乳液各组分质量分数分别为水相40%,油相45%,复配乳化剂15%;聚合反应起始温度为35℃~40℃,聚合反应搅拌速度为350~400 r/min,氧化还原引发剂用量为单体水相质量的0.3%~0.4%。上述反应条件下,聚丙烯酰胺微球的粒径分布在10~100 nm,在70℃高温环境中膨胀倍数超过50倍,同时在高盐10000 mg/L环境下膨胀倍数超过30倍。Using acrylamide(AM)and acrylic acid(AA)as polymerization monomers,N,N-methylene bisacrylamide(MBA)as crosslinking agent,kerosene as oil-soluble solvent and Span 80/Tween 80 as compound emulsifier,the temperature resistant and salt resistant polyacrylamide nanospheres were prepared by reverse microemulsion polymerization using redox initiator system(ammonium persulfate/sodium bisulfite).According to the reaction phenomenon in the polymerization process,the mass fraction of each component,the initial temperature of polymerization,the stirring speed of polymerization,the amount of redox initiator and other conditions of the inverse microemulsion polymerization were optimized.The inverse microemulsion polymerization was designed according to the optimized conditions,and the particle size and expansion ratio of the synthesized polyacrylamide microspheres were tested at high temperature and high salt.The optimum reaction conditions were as follows:water phase 40%,oil phase 45%,compound emulsifier 15%.The initial temperature of polymerization was 35℃~40℃,the stirring speed was 350~400 r/min,and the amount of redox initiator was 0.3%~0.4%of the water phase mass of monomer.Under the above reaction conditions,the particle size distribution of polyacrylamide microspheres is 10~100 nm,and the expansion ratio is more than 50 times in the high-temperature environment of 70℃,while the expansion ratio is more than 30 times in the high-salt environment of 10000 mg/L.

关 键 词：聚丙烯酰胺微球 反相微乳液聚合 耐温抗盐 纳米 

分 类 号：TE358.3[石油与天然气工程—油气田开发工程]