纳米SiO_2表面改性对复合减阻剂应用性能的影响  

Effects of nano-SiO_2 surface modification on the application performance of composite DRA

作　　者：代晓东[1,2] 刘焕荣 杨燕峰[3] 李洪言 辛艳萍[1] 陈艳红[1] 

机构地区：[1]中国石油大学胜利学院 [2]中国石油大学国家大学科技园博士后工作站 [3]河北华北石油路桥工程有限公司

出　　处：《油气储运》2017年第11期1270-1275,共6页Oil & Gas Storage and Transportation

基　　金：山东省高等学校科技计划项目"聚a烯烃油品减阻剂机械降解规律及其构效关系研究";J16LC60;中国石油大学胜利学院春晖计划项目"纳米SiO2表面修饰及其在聚烯烃减阻剂中应用的基础研究";KY2015001;东营市科技发展计划"功能化纳米复合减阻新材料合成与应用技术研究";2017KJCX08

摘　　要：针对聚a烯烃减阻剂在应用过程中易发生剪切降解的问题,基于聚合物基纳米复合材料与纳米SiO_2/聚a烯烃复合减阻材料前期研究成果,分析硅烷偶联剂KH550质量分数和体系温度对纳米SiO_2表面改性效果的影响。表面羟基数和吸油值表征测试结果表明:当KH550质量分数为15%、体系温度为50℃时,可以获得表面羟基少、吸油量大的改性纳米SiO_2粒子。采用旋转圆盘和减阻剂环道测试纳米复合减阻剂的应用性能,结果表明:改性纳米粒子可以更好地与聚a烯烃相互作用形成复合减阻材料,经圆盘剪切和离心泵2次剪切,复合减阻材料表现出更为优异的抗剪切性能。通过开展纳米SiO_2粒子改性条件研究和减阻性能测试,得出结论:相比聚a烯烃减阻剂,纳米复合减阻材料的减阻性能和抗剪切性能明显提高。Poly α-olefin drag reducing agent （DRA） tends to suffer shear degradation in the process of its application. In this paper, the effects of the mass fraction of coupling agent KH550 and system temperature on the surface modification of nano-SiO2 were investigated on the basis of the previous study on the polymer based nano-composite and nano-SiO2/poly α-olefin DRA. Surface hydroxy number and oil adsorption value were used to characterize the test results and it is shown that modified nano-SiO2 particles with less surface hydroxy and more oil adsorption are generated when the KH550 mass fraction is 15% and the system temperature is 50 ℃. The application performance of nano-DRA was tested by means of rotating disk and DRA loop test. It is revealed that the modified nano-SiO2 particles can interact better with poly α-olefin to generate the composite DRA and the shear resistance of composite DRA is much better after it is sheared by the rotary disk and twice by the centrifugal pump. And it is indicated by the investigation on the modification conditions of nano-SiO2 particles and the tests on drag reducing performance that composite nano-DRA is better on the performances of drag reduction and shear resistance than that of poly α-olefin DRA.

关 键 词：纳米SIO2 表面改性 复合减阻剂 抗剪切性能 

分 类 号：TE832[石油与天然气工程—油气储运工程]