摘要
针对玄武岩纤维(BF)表面光滑、易团聚的问题,本文采用涂层法对BF表面进行改性,以聚甲基丙烯酸、偶联剂KH-570和十六烷基三甲基氯化铵制备一种亲水型阳离子涂覆剂,并将其涂覆到BF表面,得到改性后的玄武岩纤维(MBF)。通过红外光谱仪(FT-IR)、扫描电子显微镜(SEM)、X-射线光电子能谱仪(EDS)、光学接触角测量仪和Zeta电位仪对MBF的结构进行表征。FT-IR、SEM和EDS分析结果表明:MBF表面粗糙,含有亲水性的羧基、羟基和季铵基。接触角测试结果表明:改性后,MBF亲水性大幅提高。Zeta电位测试结果表明:MBF的Zeta电位绝对值比BF大幅提高。采用图像分析法对纤维的分散性能进行了评价,结果表明:MBF的分布系数比BF提高了73%,具有更好的分散性。通过研究MBF对油井水泥力学性能的影响,结果表明:水泥石养护2 d,养护温度为80℃,纤维加量为2%(质量分数)时,MBF水泥石的抗压强度和抗折强度分别比空白水泥石提高了40.1%和37.1%;与BF水泥石相比,MBF水泥石抗压强度和抗折强度分别提高了26.6%和21.4%。通过单丝拔出试验发现,MBF与水泥的黏结性能比BF提高了35.5%。结合对MBF水泥石的SEM分析,BF表面涂层改性增加了其在水泥石中的分散性,同时纤维表面粗糙度增加,也增强了纤维与水泥间的黏结性能,提高了水泥石力学性能。
Aiming at the problems of smooth surface and easy agglomeration of basalt fiber(BF),the surface of BF was modified by coating method in this paper.A hydrophilic cationic coating agent was prepared by polymethacrylic acid,coupling agent KH-570 and cetyltrimethylammonium chloride,and it was coated on the surface of BF to obtain modified basalt fiber(MBF).The structure of MBF was characterized by infrared spectroscopy(FT-IR),scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(EDS),optical contact angle measuring instrument and Zeta potentiometer.The results of FT-IR,SEM and EDS analysis showed that the surface of MBF was rough and contained hydrophilic carboxyl,hydroxyl and quaternary ammonium groups.The contact angle test results show that the hydrophilicity of MBF is greatly improved after modification.The results of Zeta potential test showed that the absolute value of Zeta potential of MBF was significantly higher than that of BF.The dispersion properties of the fibers were evaluated by image analysis.The results showed that the distribution coefficient of MBF was 73% higher than that of BF,and it had better dispersion.The effect of MBF on the mechanical properties of oil well cement was studied.The results show that when the cement stone is cured for 2 d,the curing temperature is 80℃,and the fiber content is 2%,the compressive strength and flexural strength of the MBF cement stone are 40.1% and 37.1%higher than those of the blank cement stone,respectively.Compared with BF cement stone,the compressive strength and flexural strength of MBF cement stone were increased by 26.6% and 21.4%,respectively.Through the single fiber pull-out test,it is found that the bonding performance of MBF and cement is 35.5% higher than that of BF.Combined with the SEM analysis of MBF cement stone,which shows that the surface coating modification of BF increases its dispersion in cement stone,and the surface roughness of fiber increases,which also enhances the bonding performance between fiber and cement and improves the mechanical properties of cement stone.
作者
代锐
肖平
李祝军
娄益伟
山永林
张浩峻
DAI Rui;XIAO Ping;LI Zhujun;LOU Yiwei;SHAN Yonglin;ZHANG Haojun(Hainan Branch Office,CNOOC(China)Co.,Ltd.,Haikou 570100,China;Hainan Provincial Key Laboratory of Deep-sea Deep Energy Engineering,Chengmai 571900,China;Offshore Oil Development(Chengmai)Energy Technology Co.,Ltd.,CNOOC Energy Development Co.,Ltd.,Chengmai 571900,China;China Oilfield Services Limited,China National Offshore Oil Corporation,Tianjin 300000,China;College of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu 610500,China)
出处
《合成化学》
CAS
2024年第10期905-913,共9页
Chinese Journal of Synthetic Chemistry
基金
中国海洋石油集团有限公司“十四五”重大项目“海上超高温高压钻完井关键技术研究及示范应用”下属课题1“海上超高温高压钻完井关键技术研究”项目(CCL2022HNFN0462)。
关键词
油井水泥
玄武岩纤维
力学性能
表面改性
分散性
oil well cement
basalt fiber
mechanical property
surface modification
dispersibility
