Effect of sizing agent on carbon fiber density measurements using a floatation method

PAN Yue-xiu; FANG Yuan; HAN Da-wei; SONG Yi-jun; LI Long; GAO Jian-li; ZHU Shi-peng; YANG Yun-hua

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Article Navigation > New Carbon Mater. > 2019 > 34(5): 482-488

PAN Yue-xiu, FANG Yuan, HAN Da-wei, SONG Yi-jun, LI Long, GAO Jian-li, ZHU Shi-peng, YANG Yun-hua. Effect of sizing agent on carbon fiber density measurements using a floatation method. New Carbon Mater., 2019, 34(5): 482-488.

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Effect of sizing agent on carbon fiber density measurements using a floatation method

Aerospace Research Institute of Materials&Processing, Technology Science and Technology on Advanced Functional Composites Laboratory, Beijing 100076, China

Received Date: 2019-07-25
Accepted Date: 2019-11-04
Rev Recd Date: 2019-10-10
Publish Date: 2019-10-28

Abstract

Abstract

The density of T300 carbon fiber, as well as the amount of sizing and micro-structure were measured, before and after removing the sizing. The results showed that there was apparent stratification when measuring the density of the carbon fiber by the sink/float method, without removing the sizing. The upper sample layer was seriously flocculated with an excessive sizing amount of 2.17%, while the bottom-layer also flocculated. Two methods including acetone extraction and pyrolysis, were conducted to removing the sizing. It was shown that the measured amounts of sizing for the two methods were 1.20% and 1.53%, respectively. For the sample after immersion in acetone, there was still stratification in the sink/float test, with the upper sample layer flocculated because of the remaining sizing; while samples at the bottom dispersed relatively well. However, for the thermally treated samples the sizing was adequately removed, which resulted in the uniform density and dispersion during the test. This indicates that the non-uniform distribution of sizing agent on the surface of the CFs is the main reason for stratification during the density measurement. Therefore, the sizing must be fully removed in order to obtain an accurate density for the carbon fibers. Moreover, it can be seen that pyrolysis is an effective way to remove the CF sizing agent.
- T300 carbon fiber,
- Density test,
- Sink/float method,
- Delamination,
- Sizing amount

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References(27)

References

郭玉明, 冯志海, 王金明. 高性能PAN基炭纤维及其复合材料在航天领域的应用[J]. 高科技纤维与应用, 2007, 32(5): 2-7. (GUO Yu-ming, FENG Zhi-hai, WANG Jin-ming. Application of PAN-Based Carbon Fiber and Its Composites on Aerospace[J]. Hi-Tech Fiber & Application, 2007, 32(5): 2-7.)

冯志海. 关于我国高性能炭纤维需求和发展的几点想法[J]. 新材料产业, 2010, 9: 19-24. (FENG Zhi-hai. Some opinions on requirement and development of domestic high performance carbon fiber[J]. Advanced Materials Industry, 2010, 9: 19-24.)

贺福. 炭纤维及其应用技术[M]. 北京: 化学工业出版社, 2004, 9. (HE Fu. Carbon Fibers and its Application Technology[M]. Beijing: Chemical Industry Press, 2004, 6.)

李敏, 张佐光, 孙志杰, 罗慧珍. 炭纤维的环氧树脂浸润特性[J]. 新型炭材料, 2006, 21(1): 75-79. (LI Min, ZHANG Zuo-guang, SUN Zhi-jie, et al. Capillary impregnation of aligned carbon fiber beds with epoxy resins[J]. Advanced Materials Industry, 2006, 21(1): 75-79.)

Mangalgiri P D. Composite for aerospace applications[J]. Bulletin of Materials Science, 1999, 22(3): 657-664.

赵渠森, 郭恩明. 先进复合材料手册[M]. 北京: 机械工业出版社, 2003: 1540-1551. (ZHAO Qu-sen, GUO En-ming. Handbook of Advanced Composites[M]. China Machine Press, 2003: 1540-1551.)

黎小平, 张小平, 王红伟. 炭纤维的发展及其应用现状[J]. 高科技纤维与应用, 2005, 30(5): 24-40. (LI Xiao-ping, ZHANG Xiao-ping, WANG Hong-wei. Progress in development and application of carbon fiber[J]. Hi-Tech Fiber & Application, 2005, 30(5): 24-40.)

尤志魏, 朱爱钧, 潘裕新, 等. 炭纤维复合芯( ACCC)导线在上海电网应用分析[J]. 华东电力, 2009, 37(8): 1292-1295. (YOU Zhi-wei, ZHU Ai-jun, PAN Yu-xin, et al. Application of ACCC in electric power network of Shanghai[J]. East China Electric Power, 2009, 37(8): 1292-1295.)

胡兴军. 炭纤维在汽车上的应用[J]. 天津汽车, 2008, 12: 52-53. (HU Xing-jun. The application of carbon fiber in vehicles[J]. Tianjin Auto, 2008, 12: 52-53.)

郭慧, 黄玉东, 刘丽, 等. T300和国产炭纤维本体的力学性能对比及其分析[J]. 宇航学报, 2009, 30(5): 2068-2072. (GUO Hui, HUANG Yu-dong, LIU Li, et al. Comparison of mechanical property of unsized T300 and Chinese carbon fibers[J]. Journal of Astronautics, 2009, 30(5): 2068-2072.)

张为芹, 田艳红. 高强炭纤维束丝拉伸性能测试影响因素的研究[J]. 理化检验物理分册, 2006, 42(11): 541-533. (ZHANG Wei-qin, TIAN Yan-hong. Study on influence factors in tensile property test of HTCF yarn[J]. Physical Testing and Chemical Analysis, 2006, 42(11): 541-533.)

ZHU Shi-peng, YANG Yun-hua, FENG Zhi-hai, et al. Effect of moisture on the measured tensile strength of polyacrylonitrile carbon fibers[J]. Journal of Materials Science, 2016, 51: 2371-2379.

朱世鹏, 杨云华, 冯志海, 等. 中间相沥青基炭纤维密度表征研究[J]. 高技术纤维与应用, 2015, 40(4): 45-47,72. (ZHU Shi-peng, YANG Yun-hua, FENG Zhi-hai, et al. Characterization of the density of mesophase pitch-based carbon fibers[J]. Hi-Tech Fiber & Application, 2015, 40(4): 45-47,72.)

杨云华, 潘月秀, 冯志海, 等. 宇航级炭纤维评价表征[J]. 新型炭材料, 2014, 29(3): 161-168. (YANG Yun-hua, PAN Yue-xiu, FENG Zhi-hai, et al. Evaluation of aerospace carbon fibers[J]. New Carbon Materials, 2014, 29(3): 161-168.)

李龙, 潘月秀, 朱世鹏, 等. 炭纤维毛丝评价表征研究[J]. 新型炭材料, 2018, 33(43): 377-383. (LI Long, PAN Yue-xiu, ZHU Shi-peng, et al. Characterization and investigation of the fuzz for carbon fibers[J]. New Carbon Materials, 2018, 33(43): 377-383.)

炭纤维复丝拉伸性能试验方法[S]. 中华人民共和国国家标准, GB3362-2005. (Test methods for tensile properties of carbon fiber multifilament[S]. State Standard of the Peoples Republic of China, GB3362-2005.)

三向织物用炭纤维长丝束规范[S]. 中华人民共和国国家军用标准, GJB 1984-92. (Specification for the carbon filments of three dimensional fabric[S]. Military Standard of the People’s Republic of China, GJB 1984-92.)

炭纤维密度的测定[S]. 中华人民共和国国家标准, GB/T 30019-2013. (Carbon fiber-Determination of density[S]. State Standard of the Peoples Republic of China, GB/T 3364-2008)

炭纤维浸润剂含量的测定[S]. 中华人民共和国国家标准, GB/T 29761-2013. (Carbon fiber- Determination of size content[S]. State Standard of the Peoples Republic of China, GB/T 29761-2013.)

炭纤维直径和当量能检验方法(显微镜法)[S]. 中华人民共和国国家标准, GB/T 3364-2008. (Carbon fiber diameter and equivalent test method (microscopy)[S]. State Standard of the Peoples Republic of China, GB/T 3364-2008)

吴刚平, 吕春祥, 李永红, 等. 空气湿度对聚丙烯腈纤维稳定化过程的影响[J]. 新型炭材料, 2003, 18(1): 25-30. (WU Gang-ping, LU Chun-xiang, LI Yong-hong, et al. Effect of moisture on the stabilization of PAN fibers[J]. New Carbon Materials, 2003, 18(1): 25-30.)

吴明金, 叶宛丽, 孟祥宇, 等. 聚丙烯腈纤维体积密度影响因素研究[J]. 炭素技术, 2011, 30(6): 16-18. (WU Ming-jin, YE Wan-li, MENG Xiang-yu, et al. Effect of hot densification on the density of PAN fiber[J]. Carbon Techniques, 2011, 30(6): 16-18.)

孔令强, 肖建文, 王文胜, 等. 炭纤维体密度与预氧化当量时间的相关性研究[J]. 化工新型材料, 2012, 40(1): 108-110. (KONG Ling-qiang, XIAO Jian-wen, WANG Wen-sheng, et al. Research of correlation between density of carbon fiber and equivalent time of pre-oxidation[J]. New Chemical Materials, 2012, 40(1): 108-110.)

雷帅, 张校, 钟珊, 等. 聚丙烯腈热稳定化纤维的裂解行为[J]. 材料工程, 2017, 45(5): 59-63. (LEI Shuai, ZHANG Xiao, ZHONG Shan, et al. Degradation behavior of thermal stabilized polyacrylonitrile fibers[J]. Journal of Material Engineering, 2017, 45(5): 59-63.)

李常清, 站大川, 肖阳, 等. 高温处理对PAN基炭纤维空隙结构的影响[J]. 材料热处理学报, 2014, 35(3): 20-23. (LI Chang-qing, ZHAN Da-chuan, XIAO Yang, et al. Effect of heat-treated on void of PAN-based carbon fibers[J]. Transaction of Materials and Heat Treatment, 2014, 35(3): 20-23.)

王宝瑞, 李建国, 纪原, 等. 纤维密度测定的研究[J]. 纤维复合材料, 2009, 3: 43-46. (WANG Bao-rui, LI Jian-guo, JI Yuan, et al. Study on Fibre Density Determination[J]. Fiber Composites, 2009, 3: 43-46.)

许涛, 缪云良, 张诚. 炭纤维密度测量不确定度评定[J]. 高技术纤维与应用, 2016, 41(1): 51-53,58. (XU Tao, MIAO Yun-liang, ZHANG Cheng. Evaluation of measurement uncertainty for the density of carbon fiber[J]. Hi-Tech Fiber & Application, 2016, 41(1): 51-53, 58.)

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