Surface oxidation of PAN-based ultrahigh modulus carbon fibers (UHMCFs) and its effect on the properties of UHMCF/EP composites

doi:10.1007/s42823-020-00173-7

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	Surface oxidation of PAN-based ultrahigh modulus carbon fibers (UHMCFs) and its effect on the properties of UHMCF/EP composites
	Wang, Xinyu ; Qian, Xin ; Zhang, Yonggang ; Wang, Xuefei ; Song, Shulin ; Zhang, Cheng
刊名	CARBON LETTERS
	2020
关键词	INTERFACIAL PROPERTIES MECHANICAL-PROPERTIES ELECTROCHEMICAL OXIDATION FIBER/EPOXY COMPOSITES HIGH-STRENGTH RAMAN-SPECTROSCOPY MICROSTRUCTURE HETEROGENEITY MICROTEXTURE BEHAVIORS
DOI	10.1007/s42823-020-00173-7
英文摘要	In this study, nitric acid oxidation with varied treatment temperature and time was conducted on the surfaces of polyacrylonitrile-based ultrahigh modulus carbon fibers. Scanning electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy and surface tension/dynamic contact angle instruments were used to investigate changes in surface topography and chemical functionality before and after surface treatment. Results showed that the nitric acid oxidation of ultrahigh modulus carbon fibers resulted in decreases in the values of the crystallite thickness Lc and graphitization degree. Meanwhile, increased treating temperature and time made the decreases more obviously. The surfaces of ultrahigh modulus carbon fibers became much more activity and functionality after surface oxidation, e.g., the total surface energy of oxidized samples at 80 degrees C for 1 h increased by 27.7% compared with untreated fibers. Effects of surface nitric acid oxidation on the mechanical properties of ultrahigh modulus carbon fibers and its reinforced epoxy composites were also researched. Significant decreases happened to the tensile modulus of fibers due to decreased Lc value after the nitric acid oxidation. However, surface treatment had little effect on the tensile strength even as the treating temperature and processing time increased. The highest interfacial shear strength of ultrahigh modulus carbon fibers/epoxy composites increased by 25.7% after the nitric acid oxidation. In the final, surface oxidative mechanism of ultrahigh modulus carbon fibers in the nitric acid oxidation was studied. Different trends of the tensile strength and tensile modulus of fibers in the nitric acid oxidation resulted from the typical skin-core structure.
学科主题	Chemistry ; Materials Science
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/20594]
专题	2020专题
作者单位	1.Qian, X (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Natl Engn Lab Carbon Fiber Preparat Technol, Ningbo 315201, Zhejiang, Peoples R China. 2.Zhang, C (corresponding author), Shanghai Inst Technol, Sch Mat Sci & Engn, Shanghai 201418, Peoples R China.
推荐引用方式 GB/T 7714	Wang, Xinyu,Qian, Xin,Zhang, Yonggang,et al. Surface oxidation of PAN-based ultrahigh modulus carbon fibers (UHMCFs) and its effect on the properties of UHMCF/EP composites[J]. CARBON LETTERS,2020.
APA	Wang, Xinyu,Qian, Xin,Zhang, Yonggang,Wang, Xuefei,Song, Shulin,&Zhang, Cheng.(2020).Surface oxidation of PAN-based ultrahigh modulus carbon fibers (UHMCFs) and its effect on the properties of UHMCF/EP composites.CARBON LETTERS.
MLA	Wang, Xinyu,et al."Surface oxidation of PAN-based ultrahigh modulus carbon fibers (UHMCFs) and its effect on the properties of UHMCF/EP composites".CARBON LETTERS (2020).