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温纪宏, 李焱, 黄栋, 张新鹏, 喻西崇, 周琼. SiO2纳米粒子改性PVDF复合材料气体渗透行为[J]. 油气储运, 2023, 42(1): 72-78. DOI: 10.6047/j.issn.1000-8241.2023.01.010
引用本文: 温纪宏, 李焱, 黄栋, 张新鹏, 喻西崇, 周琼. SiO2纳米粒子改性PVDF复合材料气体渗透行为[J]. 油气储运, 2023, 42(1): 72-78. DOI: 10.6047/j.issn.1000-8241.2023.01.010
shu
WEN Jihong, LI Yan, HUANG Dong, ZHANG Xinpeng, YU Xichong, ZHOU Qiong. Gas permeation behavior of PVDF composites modified by SiO2 nanoparticles[J]. Oil & Gas Storage and Transportation, 2023, 42(1): 72-78. DOI: 10.6047/j.issn.1000-8241.2023.01.010
Citation: WEN Jihong, LI Yan, HUANG Dong, ZHANG Xinpeng, YU Xichong, ZHOU Qiong. Gas permeation behavior of PVDF composites modified by SiO2 nanoparticles[J]. Oil & Gas Storage and Transportation, 2023, 42(1): 72-78. DOI: 10.6047/j.issn.1000-8241.2023.01.010
shu

SiO2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 SiO2 nanoparticles

    摘要
  • 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SiO2进行表面改性，通过熔融共混法制备SiO2/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SiO2(N-SiO2)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SiO2良好的分散性，PVDF/N-SiO2阻隔性能更为优异，其中1.0%N-SiO2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。

     

    Abstract: In order to improve the permeation performance of polyvinylidene difluoride (PVDF), the surface modification was carried out to SiO2 with 3-aminopropyl triethoxysilane (KH-550).The SiO2/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 SiO2 (N-SiO2) 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-SiO2 becomes better due to the good dispersion of the modified SiO2.Specifically, the 1.0%N-SiO2 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)

     

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