化工进展 ›› 2018, Vol. 37 ›› Issue (10): 4022-4028.DOI: 10.16085/j.issn.1000-6613.2018-0577

• 精细化工 • 上一篇    下一篇

KH570-AM-淀粉接枝共聚物降滤失剂的制备及其性能

王爱荣1,2, 石海信2, 童张法1, 王梓民2, 王伟建2   

  1. 1 广西大学化学化工学院, 广西 南宁 530004;
    2 广西高校北部湾石油天然气资源有效利用重点实验室, 广西 钦州 535011
  • 收稿日期:2018-03-22 修回日期:2018-05-27 出版日期:2018-10-05 发布日期:2018-10-05
  • 通讯作者: 童张法,教授,博士生导师,研究方向为有机化工与功能高分子材料。
  • 作者简介:王爱荣(1982-),女,硕士研究生,研究方向为淀粉基油田化学品研发。
  • 基金资助:
    广西高校高水平创新团队及卓越学者计划(桂教人[2016]42号),广西自然科学基金(2016GXNSFCA380011)及广西中青年教师基础能力提升项目(2017KY0802)。

Preparation and properties of KH570-AM-starch graft copolymer as filtrate reducing agents

WANG Airong1,2, SHI Haixin2, TONG Zhangfa1, WANG Zimin2, WANG Weijian2   

  1. 1 School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, Guangxi, China;
    2 Guangxi Colleges and Universities Key Laboratory of Beibu Gulf Oil and Natural Gas Resource Effective Utilization, Qinzhou 535011, Guangxi, China
  • Received:2018-03-22 Revised:2018-05-27 Online:2018-10-05 Published:2018-10-05

摘要: 以木薯淀粉(CSt)为原料,丙烯酰胺(AM)、γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH570)为单体,过硫酸铵和亚硫酸氢钠按质量比为1:1构成氧化-还原引发体系,采用水相法合成淀粉-KH570-AM接枝共聚物降滤失剂(CSt-KH570-AM),探索了制备条件及其在钻井液中的应用。适宜的制备条件是:总反应物溶液质量分数为20%,m(AM)/m(CSt)=2,KH570与引发剂质量分数分别为30%和1%,溶液pH=4,反应时间3h,温度50℃。FTIR证明AM与KH570均已成功接枝到淀粉分子上;TGA-DSC及Frontier-TGA联用分析表明,CSt-KH570-AM在245℃之前热稳定性良好;XRD证明CSt-KH570-AM属非晶结构。在降滤失性能评价中,将CSt-KH570-AM与CSt-AM (质量分数分别为2.5%与1.5%)复配添加到淡水基浆中可抗温至180℃,在140℃的NaCl盐水基浆中可抗盐至饱和。

关键词: 木薯淀粉, 聚合, 制备, 降滤失剂, 性能评价

Abstract: Using the cassava starch (CSt) as raw material, the acrylamide (AM) and the γ-methacryloxypropyl trimethoxysilane (KH570) as monomer, the ammonium persulfate and sodium bisulphite formed an redox initiation system with a mass ratio 1:1. The cassava starch-graft-AM-KH570 copolymers (CSt-KH570-AM) were prepared by aqueous solution polymerization. Preparation conditions of CSt-KH570-AM and its filtration control properties in the drilling fluid were studied. The optimal reaction conditions were that:the mass fraction of total reactants aqueous solution was 20%, the ratio of m(AM) to m(CSt) was 2, the KH570 and the initiator mass fractions were 30% and 1%, respectively, the solution pH was 4, the reaction time was 3h, and the temperature was 50℃. The FTIR showed that both AM and KH570 had been successfully grafted onto starch molecules. TGA-DSC and Frontier-TGA analysis showed that thermal stability of CSt-KH570-AM was good until the temperature reached 245℃. The XRD showed that CSt-KH570-AM was amorphous. In the evaluation of fluid loss performance, CSt-KH570-AM and CSt-AM (mass fractions of 2.5% and 1.5%, respectively) were compounded and added to the freshwater slurry to resist temperatures up to 180℃, and it could be used in NaCl saturated drilling fluid at 140℃.

Key words: cassava starch, polymerization, preparation, filtrate reducing agent, performance evaluation

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