明胶接枝磺化缩聚物油井水泥分散剂的合成与性能  

Synthesis and Properties of Gelatin with Sulfonated Side Chains as an Oil Well Cement Dispersant

作　　者：王成文[1] 王瑞和[1] 步玉环[1] 周卫东[1] 程荣超[1] 

机构地区：[1]中国石油大学石油工程学院,东营257061

出　　处：《应用化学》2009年第4期373-377,共5页Chinese Journal of Applied Chemistry

基　　金：国家"八六三"高技术研究发展计划(2006AA09Z340)资助项目

摘　　要：以动物明胶为原料,通过与甲醛、丙酮和焦亚硫酸钠发生磺化接枝反应,合成了一种新型的明胶接枝磺化缩聚物油井水泥分散剂。利用红外光谱分析测试技术证明了在明胶分子侧链上引入了磺化缩聚物。测试结果表明,当合成分散剂加入质量分数为1%时,水泥浆的流性指数、稠度系数和稠化时间比值(与未加水泥浆)分别为1.124、0.014和1.02,抗压强度比值均大于1.0,在18%NaCl、37%NaCl和2%CaCl2盐水水泥浆的流性指数分别为1.021、1.087和0.914、稠度系数分别为0.035、0.025和0.063。结果证明,明胶接枝磺化缩聚物的分散性能优异、耐盐性强并且无缓凝副作用,性能与常用的磺化醛酮缩聚物分散剂接近,是一种新型的预期可生物降解的油井水泥分散剂。A new cement dispersant for oil well cement,gelatin with sulfonated side chains,was synthesized by sulfonation grafting reaction of gelatin with formaldehyde,acetone and sodium pyrosulfite.FT-IR was utilized to confirm the presence of the sulfonated side chains on the gelatin.When the concentration of the synthesized dispersant reached 1%,the fluidity index,the consistency coefficient and the thickening time ratio of cement slurry were 1.124,0.014 and 1.02 respectively,and the corresponding compression-strength ratio was larger than 1.0.Meanwhile,with the same loading of the synthesized dispersant,the fluidity indexes and consistency coefficients of the saline cement slurries with 18%NaCl,37%NaCl or 2%CaCl2 were 1.021,1.087,0.914,and 0.035,0.025,0.063,respectively.Test results verified that the modified gelatin had an excellent dispersivity,strong brine tolerance and no side effect of retardation on cement slurry,as well as similar properties of conventional dispersants in the form of sulfonated aldehyde and ketone condensate.The gelatin with sulfonated side chains is expected to be a new kind of biodegradable dispersant.

关 键 词：分散剂 油井水泥 明胶 磺化缩聚物 生物降解 

分 类 号：O633.4[理学—高分子化学]