Mechanical properties and thermal conductivity of polyamide 6/graphene oxide modified carbon fiber composites

doi:10.19936/j.cnki.2096-8000.20230328.005

Abstract

Abstract: Carbon fibers were modified with graphene oxide (GO-KCF), polyamide 6/graphene oxide modified carbon fibers (PA6/GO-KCF), polyamide 6/pure carbon fibers (PA6/CF), and polyamide 6/graphite (PA6/graphite) were prepared by twin-screw extruder. The composition and thermal stability of modified carbon fibers, as well as the cross-sectional morphology, bending properties and thermal conductivity of the composite materials were analyzed. Infrared spectral analysis results confirmed the existence of —OH, —NH—, —CN—, O—Si—O and other structures in GO-KCF, indicating that graphene oxide was successfully grafted to the surface of carbon fibers. Thermo gravimetric analysis results show that GO-KCF has good thermal stability, and the mass loss rate is only about 3.5%. The cross-sectional SEM results of the composite material show that GO-KCF effectively improves the interfacial compatibility with the PA6 resin matrix and the dispersion in the matrix, the modified carbon fiber can form a three-dimensional network structure in the resin matrix, which can play the role of transmitting external force loads. When the addition amount of the modified materials is 11wt%, the bending strength of the PA6/GO-KCF composite material reaches 180 MPa, which is 38.5% and 24.1% higher than that of PA6/CF and PA6/graphite composites, respectively. The thermal conductivity test results show that the thermal conductivity of PA6/GO-KCF composites is better than that of PA6/graphite composites. With the same addition amount of 9wt%, the thermal conductivity of the PA6/GO-KCF composite reaches 2.42 W/m·K, which is 2.7 times and 3.9 times that of PA6/graphite and PA6/CF, respectively.

Key words: polyamide 6, carbon fiber composite, graphene oxide, mechanical properties, thermal conductivity

CLC Number:

TB332

BI Yifan, CHENG Baofa, ZHU Xiangdong. Mechanical properties and thermal conductivity of polyamide 6/graphene oxide modified carbon fiber composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(3): 34-38.

References

[1] 陶积柏, 黎昱, 张玉生, 等. 高模量碳纤维在中国宇航结构产品上的应用现状及实现自我保障的建议[J]. 材料科学与工艺, 2015, 23(6): 98-103.
[2] 张芳, 许文彬, 殷永霞, 等. 国产BHM3碳纤维在卫星结构中的应用研究[J]. 航天制造技术, 2015(5): 26-29.
[3] 董彦芝, 刘芃, 王国栋, 等. 航天器结构用材料应用现状与未来需求[J]. 航天器环境工程, 2010(1): 41-44.
[4] 李明高, 张丽娇. 轨道交通装备复合材料应用现状及发展趋势展望[J]. 纺织导报, 2020(7): 20-24.
[5] 宋燕利, 杨龙, 郭巍, 等. 面向汽车轻量化应用的碳纤维复合材料关键技术[J]. 材料导报, 2016(17): 16-25.
[6] 芦长椿. 低成本碳纤维复合材料在乘用车上的应用[J]. 高科技纤维与应用, 2016(2): 14-18.
[7] 李莹, 信春玲, 曹敏华, 等. 连续玻璃纤维增强聚丙烯预浸带熔融预浸过程[J]. 复合材料学报, 2018(5): 1080-1086.
[8] 郭云竹. 热塑性复合材料研究及其在航空领域中的应用[J]. 纤维复合材料, 2016(3): 20-23.
[9] 孙银宝, 李宏福, 张博明. 连续纤维增强热塑性复合材料研发与应用进展[J]. 航空科学技术, 2016(5): 1-7.
[10] 刘茂晨, 肖建华, 李志鹏. 短切CF增强TPEE热塑性复合材料的注射成型及力学性能研究[J]. 塑料工业, 2020(2): 97-102.
[11] 袁海兵. 短切碳纤维增强聚丙烯复合材料的性能[J]. 合成树脂及塑料, 2018(2): 24-28.
[12] 于天淼, 高华兵, 王宝铭, 等. 碳纤维增强热塑性复合材料成型工艺的研究进展[J]. 工程塑料应用, 2018(4): 52-55.
[13] 陈姗, 唐梓健, 李彦涛, 等. 碳纤维增强聚丙烯复合材料的制备及性能研究[J]. 中国塑料, 2017(4): 24-29.
[14] RAMANATHAN T, ABDALA A A, STANKOVICH S, et al. Functionalized graphene sheets for polymer nanocomposites[J]. Nature Nanotechnology, 2008(3): 327-331.
[15] KALAITZIDOU K, FUKUSHIMA H, DRZAL L T. Mechanical properties and morphological characterization of exfoliated graphite of polypropylene nanocomposites[J]. Composites Part A: Applied Science and Manufacturing, 2007(38): 1675-1682.
[16] LI J, KIM J K. Percolation threshold of conducting polymer composites containing 3D randomly distributed graphite nanoplatelets[J]. Composites Science and Technology, 2007(67): 2114-2120.
[17] 陈同海. 长碳纤维增强尼龙复合材料的制备及性能研究[D]. 北京: 北京化工大学, 2014.
[18] 刘云斌. 纤维增强尼龙复合材料的韧性研究进展[J]. 塑料科技, 2021(8): 117-120.
[19] 王军祥, 李凌, 葛世荣, 等. 表面处理碳纤维对增强尼龙复合材料性能影响[J]. 中国矿业大学学报, 2002(2): 158-161.
[20] 程宝发, 李向梅, 张文超, 等. 聚碳酸酯与硅倍半氧烷复合物气相热裂解和凝聚相产物对比[J]. 高分子材料科学与工程, 2016, 32(12): 91-97.