以2-丙烯酰胺-2-甲基丙磺酸(AMPS)、N,N-二甲基丙烯酰胺(DMAA)、马来酸酐(MA)和甲基丙烯磺酸钠(SMAS)等为原料,采用反相乳液聚合法并引入非离子型乳化剂异构十三醇聚氧乙烯醚和司班80合成了一种抗高温耐盐四元共聚物粉体降失水剂ADMS。利用FT-IR、NMR、TG和GPC对共聚物的结构和热稳定性进行表征,并对ADMS进行了性能评价。结果表明,4种功能单体均参与了反应,ADMS的重均分子质量达448 198,耐温可达320℃;ADMS抗温能力良好,使用温度在30~200℃;200℃时,添加3% ADMS的淡水基水泥浆失水量为48 mL;ADMS抗盐能力良好,在半饱和盐水和饱和盐水基水泥浆中分别添加4%和5%的ADMS可控制失水量在50 mL以内;ADMS对水泥浆稠化时间、水泥石抗压强度等无不利影响。

Using 2-acrylamido-2-methylpropanesulfonic acid (AMPS),N,N-dimethylacrylamide (DMAA),maleic anhydride (MA) and sodium methacrylsulfonate (SMAS) as raw materials,ADMS,a high-temperature and salt resistant quaternary copolymer powder fluid loss agent,is synthesized through inverse emulsion polymerization method by adding non-ionic emulsifiers including iso-tridecanol polyoxyethylene ether and span 80.The structure and thermal stability of the copolymer are characterized by means of FT-IR,NMR,TG and GPC,and the performance of ADMS is evaluated.It is indicated by the results that all four kinds of functional monomers involve in the reaction.The weight average molecular weight of ADMS reaches 448 198.ADMS can stand by high temperature as high as 320℃,and can be used in 30-200℃.At 200℃,the water loss of fresh water-based cement slurry with 3% ADMS is 48 mL.ADMS exhibits a good salt resistance.The water loss can be controlled within 50 mL by adding 4% and 5% ADMS to semi-saturated salt water and saturated salt water based cement slurry,respectively.ADMS has no adverse effect on the thickening time of cement slurry and the compressive strength of cement stone.

李壮壮(1996-),男,硕士生,研究方向为粉体降失水剂的合成及应用研究,183211089@qq.com