| 纳米芳纶增强聚酰亚胺气凝胶纤维的制备及其性能研究 |
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| 引用本文： | 陈纤,赵昕,董杰,绳索修,李海涛,滕翠青.纳米芳纶增强聚酰亚胺气凝胶纤维的制备及其性能研究[J].合成纤维工业,2021,44(2):38-42,46. |
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| 作者姓名： | 陈纤 赵昕 董杰 绳索修 李海涛 滕翠青 |
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| 作者单位： | 东华大学 材料科学与工程学院,上海 201620;纤维改性国家重点实验室,上海201620;中国航空工业集团公司沈阳飞机设计研究所,辽宁 沈阳 110035 |
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| 基金项目： | 国防科工局军口配套项目和纺织之光应用基础研究项目(J201602,J201803)。 |
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| 摘 要： | 以3,3',4,4'-联苯四甲酸二酐和1,4-二氨基苯二胺共聚制备聚酰胺酸盐前驱体溶液,通过湿法纺丝,然后经过超临界二氧化碳干燥和热亚胺化处理制得纳米芳纶(ANFs)增强聚酰亚胺(PI)气凝胶纤维(简称PI/ANFs气凝胶纤维),研究了气凝胶纤维的结构与性能.结果表明:傅里叶变换红外光谱和X射线衍射光谱表征所制备的PI...
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| 关 键 词： | 聚酰亚胺气凝胶纤维 湿法纺丝 纳米芳纶 超临界二氧化碳 结构 性能 |
Preparation and properties of aramid nano-fibers reinforced polyimide aerogel fibers |
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| CHEN Xian,ZHAO Xin,DONG Jie,SHENG Suoxiu,LI Haitao,TENG Cuiqing.Preparation and properties of aramid nano-fibers reinforced polyimide aerogel fibers[J].China Synthetic Fiber Industry,2021,44(2):38-42,46. |
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| Authors: | CHEN Xian ZHAO Xin DONG Jie SHENG Suoxiu LI Haitao TENG Cuiqing |
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| Affiliation: | (School of Materials Science and Engineering,Donghua University,Shanghai 201620;State Key Laboratory of Fiber Material Modification,Shanghai 201620;Shenyang Aircraft Design and Research Institute,Aviation Industry Corporation of China,Shenyang 110035) |
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| Abstract: | Polyamide acid precursor solution was prepared by the copolymerization of 3,3′4,4′-biphenyl tetracarboxylic acid dianhydride and 1,4-diaminobenzene diamine and was produced into aramid nano-fibers reinforced polyimide(PI/ANFs)aerogel fiber by wet spinning prior to supercritical carbon dioxide drying and thermal imidization.The structure and properties of the aerogel fibers were studied.The results showed that the prepared PI/ANFs aerogel fibers were proved to be the target products by Fourier transform infrared spectroscopy and X-ray diffraction spectroscopy;the cross-section of PI/ANFs aerogel fiber had a large amount of pore structures with uniform distribution;the PI/ANFs aerogel fiber had a specific surface area of 152 m2/g,the pore size mainly distributed at 10-25 nm,the density 0.21 g/cm3and the porosity above 85%;the maximum thermal decomposition temperature of PI/ANFs aerogel fiber was 625℃in air,and the carbon residue rate was 67%at 950℃in nitrogen atmosphere;and the breaking strength and initial modulus of PI/ANFs aerogel fiber were(2.5±0.5)MPa and(109±10)MPa respectively. |
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| Keywords: | polyimide aerogel fiber wet spinning aramid nano-fiber supercritical carbon dioxide structure properties |
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