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硼酸交联磷酸化制备的聚乙烯醇增强阻燃聚丙烯腈复合纤维

Polyvinyl Alcohol Reinforced Flame-Retardant Polyacrylonitrile Composite Fiber Prepared by Boric Acid Cross-Linking and Phosphorylation.

作者信息

Ren Yuanlin, Tian Tian, Jiang Lina, Liu Xiaohui, Han Zhenbang

机构信息

School of Textiles, Tianjin Polytechnic University, Tianjin 300387, China.

Key Laboratory of Advanced Textile Composite, Ministry of Education, Tianjin Polytechnic University, 7 Tianjin 30038, China.

出版信息

Materials (Basel). 2018 Nov 27;11(12):2391. doi: 10.3390/ma11122391.

DOI:10.3390/ma11122391
PMID:30486471
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6316903/
Abstract

To improve the strength and maintain the inherent properties of flame-retardant polyacrylonitrile (FR-PAN) fiber, a commercialized hydrocarbon polymer, i.e., poly (vinyl alcohol) (PVA), used as an enhancement component, was blended with polyacrylonitrile (PAN) spinning dope to fabricate a PVA/PAN composite fiber through wet-spun technology. Then, cross-linked PVA/PAN composite fiber (C-PVA/PAN) was acquired via boric acid cross-linking. Finally, flame-retardant C-PVA/PAN fiber (FR-PVA/PAN) was prepared by phosphorylation. The structures of the samples were characterized by Fourier transform infrared analysis (FTIR) and X-ray photoelectron spectroscopy (XPS). The thermogravimetric analysis (TGA) results reveal that the thermal stability of the composite fiber is lower than that of the pristine PAN fiber. However, the char residue of the composite fiber is higher than that of the control sample, wherein, FR-PVA/PAN has the highest char residue of 62.5 wt% at 800 °C. The results regarding the combustion properties of FR-PVA/PAN show that the fire hazard of FR-PVA/PAN is restrained greatly, indicating excellent flame-retardant performance. The corresponding flame-retardant mechanism of FR-PAV/PAN is investigated by Pyrolysis gas chromatography and mass spectrometry (Py-GC/MS) and thermogravimetric analysis coupled with Fourier transform infrared analysis (TG-FTIR). The results indicate the gas-phase and condensed-phase flame-retardant mechanisms.

摘要

为了提高阻燃聚丙烯腈（FR-PAN）纤维的强度并保持其固有性能，一种商业化的烃类聚合物，即聚乙烯醇（PVA），被用作增强组分，与聚丙烯腈（PAN）纺丝原液混合，通过湿法纺丝技术制备PVA/PAN复合纤维。然后，通过硼酸交联获得交联PVA/PAN复合纤维（C-PVA/PAN）。最后，通过磷酸化制备阻燃C-PVA/PAN纤维（FR-PVA/PAN）。通过傅里叶变换红外分析（FTIR）和X射线光电子能谱（XPS）对样品结构进行表征。热重分析（TGA）结果表明，复合纤维的热稳定性低于原始PAN纤维。然而，复合纤维的残炭率高于对照样品，其中FR-PVA/PAN在800℃时具有最高残炭率62.5 wt%。FR-PVA/PAN燃烧性能的结果表明，FR-PVA/PAN的火灾危险性得到了极大抑制，显示出优异的阻燃性能。通过热解气相色谱-质谱联用（Py-GC/MS）和热重分析-傅里叶变换红外联用（TG-FTIR）研究了FR-PAV/PAN相应的阻燃机理。结果表明了气相和凝聚相阻燃机理。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f69/6316903/f0d0f29ccab8/materials-11-02391-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f69/6316903/38643585e7d3/materials-11-02391-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f69/6316903/87759071fc27/materials-11-02391-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f69/6316903/80569baaf728/materials-11-02391-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f69/6316903/3748b32001aa/materials-11-02391-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f69/6316903/10dc141cf94a/materials-11-02391-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f69/6316903/e0fed64a2bb4/materials-11-02391-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f69/6316903/e8560ce3f006/materials-11-02391-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f69/6316903/f0d0f29ccab8/materials-11-02391-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f69/6316903/38643585e7d3/materials-11-02391-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f69/6316903/87759071fc27/materials-11-02391-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f69/6316903/80569baaf728/materials-11-02391-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f69/6316903/3748b32001aa/materials-11-02391-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f69/6316903/10dc141cf94a/materials-11-02391-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f69/6316903/e0fed64a2bb4/materials-11-02391-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f69/6316903/e8560ce3f006/materials-11-02391-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f69/6316903/f0d0f29ccab8/materials-11-02391-g007.jpg

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