交联-羧甲基复合变性淀粉的流变与降失水性能  

Rheological and Water-loss Control Properties of Crosslinking and Carboxymethylation Composite Modified Starch

作　　者：刘祥[1] 吕伟[1] 李谦定[1] 

机构地区：[1]西安石油大学化学化工学院,西安710065

出　　处：《应用化学》2007年第3期357-360,共4页Chinese Journal of Applied Chemistry

摘　　要：以马铃薯淀粉和氯乙酸为主要原料,通过交联-醚化制备了交联-羧甲基复合变性淀粉（CCMS）,考察了所得CCMS糊液的流变性能和在钻井泥浆中的降滤失水性能,并对其降失水原理进行了探讨。结果表明,在质量分数为0.5%-4.0%、温度为20-60℃的实验条件下,CCMS糊液表现为假塑性流体特征,符合Ostwald-Dewaele的经验公式ηa=Kγ^n-1;将CCMS与中粘羧甲基纤维素（MV-CMC）进行对比实验,结果发现,在饱和盐水泥浆和4%盐水泥浆中,当其用量分别为MV-CMC质量分数的57%和75%时,就可达到钻井液用MV-CMC的增粘、降滤失水性能指标。Composite modified starch （CCMS） with a high viscosity was prepared by means of crosslinking and carboxymethylation with potato starch and chloroactic acid as the major raw material. The rheological and water-loss control properties of CCMS were investigated in detail. The mechanism of water-loss control was also explored. The results show that the paste of CCMS with a dosage of 0. 5% -4. 0% behaved as a pseudoplastic liquid at 20℃ to 60 ℃, which conformed to the empirical formula of the Ostwald-De waele equation ηa = Kγ^n-1; CCMS was compared with MV-CMC, and it was found that the performance indexes for viscosity increase and water-loss control of CCMS matched that of MV-CMC when the loading ofCCMS was only 57% and 75% that of MV-CMC in saturated salt water mud and 4% salt water mud, respectively.

关 键 词：复合变性淀粉 羧甲基淀粉钠 流变性能 假塑性流体 降滤失剂 

分 类 号：O636.1[理学—高分子化学] TE254.2[理学—化学]