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干法纺聚酰亚胺纤维氧化处理及其对结构性能的影响 预览 被引量:1

Oxidation Treatment of Dry.Spinning Polyimide Fibers and Its Change in the Structure And Properties
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摘要 以H2O2为湿化学处理液,利用扫描电镜、热重分析仪、纤维检测系统、单纤维电子强力仪、傅里叶变换红外光谱仪、X射线光电子能谱仪、X射线粉末衍射仪分别研究了H2O2氧化对干法纺聚酰亚胺纤维浸润性能、微观形貌、热失重性能、直径及力学性能、化学结构、表面元素含量和微观聚集态结构的影响。结果表明,H2O2氧化后,纤维表面凹凸不平,比表面积及粗糙度增加,局部发生刻蚀,引入了活性基团,表面能提高,O/C比值增加,浸润性能得到改善,且随着H2O2浓度或温度提高、处理时间延长,浸润性能改善趋势加快,热失重性能保持较好,直径及力学性能略微下降。表面氧化使纤维化学结构变化不大,微观聚集态结构发生改变,非结晶区比例上升,采用适当的H2O2处理工艺,有助于聚酰亚胺纤维表面进行功能化改性。 H2O2 served as wet chemical treatment fluid, was used for dry-spinning polyimide fibers and the impact of H2O2 oxidation on wetting properties, surface morphology, thermogravimetric properties, diameter and mechanical properties, chemical structure, content of the surface element and microscopic state of aggregation structure of fibers was analyzed by SEM, TG, fiber detection system, single fiber electronic strength meter, FT-IR, XRD and XPS. The results indicate that after H2O2 oxidation, fibers surface becomes uneven, roughness increases, the surface energy and O/C ratio increase, the wetting properties are enhanced; moreover, with the higher H2O2 concentration or the increase of temperature and processing time, wetting properties improve sharply, thermogravimetric properties keep preferably, the diameter and mechanical properties degrade slightly. The surface oxidation does not change the chemical structure of fibers significantly, the microscopic state of aggregation structure change, the amorphous region content rises. Taken together, the functional modification of PI fiber surface can be efficiently achieved by employing a suitable H2O2 oxidation process.
作者 陈乐 龙柱 桑明珠 王士华 胡爱林 李志强 郭帅 Le Chen1,2, Zhu Long1,2, Mingzhu Sang1,2, Shihua Wang3, Ailin Hu4, Zhiqiang Li3, Shuai Guo4 ( 1. Laboratory of Papermaking, School of Textiles & Clothing, Jiangnan University, Wuxi 214122, China ; 2. Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, China ; 3. Lianyungang Industry Investment Group Co., Ltd , Lianyungang 222002, China ; 4. Lianyungang New Fiber Materials Co., Ltd , Lianyungang 222000, China )
出处 《高分子材料科学与工程》 CSCD 北大核心 2017年第9期77-81,89共6页 Polymer Materials Science & Engineering
基金 国家自然科学基金资助项目(31270633) 连云港“555工程”计划(2015-13) 江苏省科协提升学会服务科技创新能力计划首席专家(工程师)项目(苏科协发[2015]138号) 杭州钱江特聘专家计划 江苏高校优势学科建设工程
关键词 复合材料 聚酰亚胺纤维 表面氧化 浸润性能 结构 性能 composites polyimide fibers surface oxidation wetting properties structure properties
作者简介 通讯联系人:龙柱,主要从事特种纸、造纸助剂和生物质综合利用的研究,E-mail:longzhu@jiangnan.edu.cn
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