SiO_(2)纳米粒子改性PVDF复合材料气体渗透行为  

Gas permeation behavior of PVDF composites modified by SiO_(2) nanoparticles

作　　者：温纪宏 李焱 黄栋 张新鹏 喻西崇 周琼[1] WEN Jjihong;LI Yan;HUANG Dong;ZHANG Xinpeng;YU Xichong;ZHOU Qiong(College of New Energy and Materials,China University of Petroleum(Beijing);CNOOC Research Institute Co.Ltd.)

机构地区：[1]中国石油大学(北京)新能源与材料学院,北京市102249 [2]中海油研究总院有限责任公司

出　　处：《油气储运》2023年第1期72-78,共7页Oil & Gas Storage and Transportation

基　　金：中海石油(中国)有限公司科技课题“深水油气输送软管内部流体渗透模拟及控制技术研究”,YXKY-ZX052020。

摘　　要：为改进聚偏氟乙烯(PVDF)的渗透性能,采用硅烷偶联剂3-氨丙基三乙氧基硅烷(KH-550)对SiO_(2)进行表面改性,通过熔融共混法制备SiO_(2)/PVDF纳米复合材料,并研究改性前后纳米粒子对复合材料热力学性能、力学性能及气体阻隔性的影响。结果表明改性SiO_(2)(N-SiO_(2))在基体中的分散性显著提高:掺杂改性纳米粒子后,PVDF的渗透系数显著降低;由于改性SiO_(2)良好的分散性,PVDF/N-SiO_(2)阻隔性能更为优异,其中1.0%N-SiO_(2)体系的渗透系数较纯PVDF降低18.6%,气体阻隔性最佳;随着温度上升,复合材料的渗透系数随之增加。研究结果可为柔性立管内衬层材料阻隔性改善提供参考。(图9,表2,参20)In order to improve the permeation performance of polyvinylidene difluoride (PVDF),the surface modification was carried out to SiO_(2)with 3-aminopropyl triethoxysilane (KH-550).The SiO_(2)/PVDF nanocomposite was prepared by the melt blending method to study the effects of nanoparticles on the thermodynamic property,mechanical properties,and gas barrier property of the composite before and after modification.According to the results,the dispersion of the modified SiO_(2)(N-SiO_(2)) in the matrix is significantly improved.The permeability coefficient of PVDF is significantly reduced after the addition of modified nanoparticles,but the barrier property of PVDF/N-SiO_(2)becomes better due to the good dispersion of the modified SiO_(2).Specifically,the 1.0%N-SiO_(2)has the permeability coefficient 18.6%lower than that of the pure PVDF and has the best barrier property.In addition,the permeability coefficient increases as the temperature rises.Generally,the research results could provide reference for improving the barrier property of lining in the flexible riser.(9 Figures,2 Tables,20 References)

关 键 词：聚偏氟乙烯 二氧化硅 力学性能 渗透性能 

分 类 号：TE832[石油与天然气工程—油气储运工程]