Preparation and Properties of Polyvinylidene Fluoride/Expanded Graphite High Dielectric Composites
GUO Huachao1, DENG Wei2, YANG Bo1, HUANG Guojia1, LI Shuang1, WEN Fang1
1 Guangzhou Special Pressure Equipment Inspection and Research Institute, Guangzhou 510663 2 School of Material Science and Engineering, Harbin University of Science and Technology, Harbin 150040
Abstract: The polyvinylidene fluoride/expanded graphite (PVDF/EG) composites were prepared by solution mixing, and the effects of EG content on the microstructure, electrical, mechanical and thermal stability of the composites were studied. The results show that the addition of expan-ded graphite (EG) greatly reduce the volume resistivity (ρv), improve the dielectric constant (εr) and the dielectric loss (tanδ) of the compo-sites, and the percolation threshold in PVDF/EG composites is about 4wt%. The ρv is 11 orders of magnitude smaller than that of pure polyvinylidene fluoride (PVDF) when the EG content is 5wt%, and εr is increased by about 68.75 times to 550. With the addition of EG, the tensile strength and Young modulus of the composites increase firstly and then decrease, reaching the maximum value of 58.31 MPa and 910.09 MPa respectively when the content of EG is 5wt%, which is increased by 27.76% and 70.10% in comparison with pure PVDF. While the elongation at break of the composites decrease gradually with the addition of EG. Furthermore, thermal stability of the composites is obviously improved when EG content is low, the decomposition temperature of 5% weight loss of PVDF/EG(4wt%) composites is 5.90 ℃ higher than that of PVDF.
Mishra P, Bhat B R, Bhattacharya B, et al. Metal and Polymer Matrix Composites, 2018, 70, 1302.2 Rizzello G, Naso D, York A, et al. Smart Materials & Structure, 2016, 25 (3), 035034.3 Hu N, Karube Y, Arai M, et al. Carbon, 2010, 48(3), 680.4 Luo L, Li X R, Wang H H, et al. Journal of Functional Materials, 2018, 49 (2), 2103(in Chinese).罗璐, 李小瑞, 王海花, 等. 功能材料, 2018, 49 (2), 2103.5 Zhu Y, Li L. Polymer Materials Science and Engineering, 2017, 33 (4), 35(in Chinese).朱燕, 李莉. 高分子材料科学与工程, 2017, 33 (4), 35.6 Jiang J, Chen S, Li J J, et al. Journal of Textile Research, 2018, 39 (2), 14(in Chinese).蒋洁, 陈胜, 李静静, 等. 纺织学报, 2018, 39 (2), 14.7 Deng H, Lin L, Ji M, et al. Progress in Polymer Science, 2014, 39 (4), 627.8 You F, Wang D R. Acta Polymerica Sinica, 2014(7), 878(in Chinese).游峰, 王东瑞. 高分子学报, 2014(7), 878.9 Ram R, Rahaman M, Khastgir D. Composites Part A, 2015, 69, 30.10 Xu X L, Yang C J, Yang J H, et al. Composites Part B, 2017, 109, 91.11 Ram R, Rahaman M, Khastgir D. Journal of Applied Polymer Science, 2014, 131 (3), 1082.12 Pei L X, Wang X Y, Xu J C, et al. New Chemical Materials, 2017, 45(2), 228(in Chinese).裴丽霞, 王雪银, 徐建昌, 等. 化工新型材料, 2017, 45(2), 228.13 Yang Y L, Yan S C, Xue Y H, et al. Materials Review B:Research Papers, 2016, 30(8), 15(in Chinese).杨育林, 闫世程, 薛亚红, 等. 材料导报:研究篇, 2016, 30(8), 15.14 Li Y C, Li R K Y, Tjong S C. Journal of Nanomaterials, 2010 (19), 139.15 Li Y C, Li R K Y, Tjong S C. Journal of Materials Research, 2010, 25 (8), 1645.16 Guo H C, Yu W L, Yang S J, et al. Insulating Materials, 2017, 50(11), 1(in Chinese).郭华超, 于伟莉, 杨是佳, 等. 绝缘材料, 2017, 50(11), 1.17 Uyor U O, Popoola A P, Popoola O, et al. Advances in Polymer Techno-logy, 2018, 37(8), 2838.18 Kang Y. China Rubber/Plastics Technology and Equipment(rubber), 2018, 44(11), 6 (in Chinese).康永. 橡塑技术与装备, 2018, 44(11), 6.19 Wang J L, Wang W Y, Shi J Y, et al. Acta Materiae Compositae Sinica, 2015, 32(5), 1355 (in Chinese).王金龙, 王文一, 史菁元, 等. 复合材料学报, 2015, 32(5), 1355.20 Liang J Z, Du Q, Tsui C P, et al. Composites Part B, 2016, 95, 166.21 He D, Xie L S, Ma Y L. China Plastics, 2015, 29 (8), 32(in Chinese).何达, 谢林生, 马玉录. 中国塑料, 2015, 29 (8), 32.22 Li Y, Li R K Y, Tjong S C. E-polymers, 2009, 9 (1), 217.23 Li H X, Lou Y, Han X H, et al. Non-Metallic Mines, 2018, 41(2), 14(in Chinese).李会新, 娄雨, 韩兴华, 等. 非金属矿, 2018, 41(2), 14.24 Dai L Q, Peng X, Yan J, et al. Chemical Production and Technology, 2016, 23(5), 32(in Chinese).戴连奇, 彭雄, 阎洁, 等. 化工生产与技术, 2016, 23(5), 32.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2019, Vol. 33 
