长链疏水改性苯丙共聚物乳液的合成及固沙性能  

The Synthesis and Sand Solidification Properties of Long Chain Hydrophobic Modified Styrene-acrylic Copolymer Emulsion

作　　者：曾湘楚 张光华[1] 武哲[1] ZENG Xiangchu;ZHANG Guanghua;WU Zhe(Shaanxi Provincial Key Laboratory of Chemical Additives for Industry∥College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi’an 710021,China)

机构地区：[1]陕西科技大学化学与化工学院∥陕西省轻化工助剂重点实验室,西安710021

出　　处：《华南师范大学学报（自然科学版）》2021年第6期34-42,共9页Journal of South China Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(31670596);陕西省自然科学基础研究计划项目(2020GY-232)。

摘　　要：以苯乙烯(St)和甲基丙烯酸甲酯(MMA)为硬单体,丙烯酸丁酯(BA)、丙烯酸(AA)和丙烯酸羟乙酯(HEA)为软单体,丙烯酸十八酯(SA)为功能单体,过硫酸钾(KPS)为引发剂,聚氧乙烯辛基苯酚醚-10(OP-10)和十二烷基硫酸钠(SDS)为复合乳化剂,采用种子乳液聚合,制备了长链疏水改性苯丙共聚物乳液,采用氢核磁共振(1H NMR)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、热重分析(TGA)等对共聚物进行表征并研究其固沙性能.结果表明:当乳化剂SDS与OP-10的质量比为1∶1,亲油亲水平衡值(HLB)为27.50时,乳液最稳定,平均粒径为1.423μm,乳液分散指数(TSI)为0.413.丙烯酸十八酯质量分数为3%(占单体总质量的比例)时,聚合物热分解温度约为340℃,胶膜硬度达到3 H,吸水率降低至3.25%,水接触角提高至78.6°.改性苯丙共聚物乳液作为固沙剂使用,当固沙剂固含量(质量分数)为15%、添加量为5 g/cm3时,沙柱的无侧限抗压强度为118.32 kPa、内聚强度为16.53 kPa、内摩擦角为8.68°,沙盘的相对冲刷保留率为98.2%,相对风蚀保留率为100%.A long chain hydrophobic modified styrene-acrylic copolymer emulsion was prepared with seed emulsion polymerization using styrene(St)and methyl methacrylate(MMA)as hard monomer,butyl acrylate(BA),acrylic acid(AA)and hydroxyethyl acrylate(HEA)as soft monomer,stearyl acrylate(SA)as functional monomer,potassium persulfate(KPS)as initiator,polyoxyethylene octyl phenol ether-10(OP-10)and sodium dodecyl sulfate(SDS)as compound emulsifier.the copolymer was characterized with 1HNMR,SEM,TEM,TGA,etc.And its sand-fixation performance was studied.The results showed that when the mass ratio of emusifiers of SDS to OP-10 was 1∶1 and the hydrophilic lipophilic balance(HLB)was 27.50,the emulsion was the most stable with an average particle size of 1.423μm and a TSI of 0.413.When the amount of stearyl acrylate(SA)was 3%(the total mass of monomer),the thermal decomposition temperature of polymer was about 340℃,the hardness of film reached to 3 H,the water absorption rate decreased to 3.25%and the water contact angle increased to 78.6°.The modified styrene-acrylic copolymer emulsion could be used as a sand solidification agent with a solid content of 15%and a dosage of 5 g/cm3,the unconfined compressive strength of the sand column was 118.32 kPa,the shear strength was 16.53 kPa,the internal friction angle was 8.68°,the relative resistance to erosion rate of the sand table was 98.2%,and the relative resistance to wind erosion rate was 100%.

关 键 词：苯丙乳液 丙烯酸十八酯 疏水改性 固沙剂 种子乳液聚合 

分 类 号：O631[理学—高分子化学]