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Three-dimensional printing of high-performance polyimide by direct ink writing of hydrogel precursor

机译：水凝胶前体直接墨水写入高性能聚酰亚胺的三维印刷

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摘要

Three-dimensional (3D) printing of all-aromatic polyimides (PIs) is attracting extensive attention due to the advantages of excellent comprehensive performances and complex structures. It still remains challenges because of some drawbacks, such as poor solubility and infusibility, and the environmental unfriendly preparation. Here, polyamide acid salt (PAAS) hydrogels were prepared by the reaction of polyamide acid (PAA) with organic amines in water. PAAS hydrogels had remarkable rheological properties, which made it applied in direct ink writing 3D printing. The printed objects were finally converted into high-performances PI objects with prominent mechanical properties and thermal stability. Not only so, the advantages also include simple preparation, less organic solvent, low thermal imidization temperature (250 degrees C), controllable macrostructure and porous microstructure, and the present 3D printed PI by PAAS was expected to significantly promote the application potentials. In this study, thermal conductivity (100 degrees C) of the PI objects after structure design and 3D printing was reduced from 0.102 W m(-1) K-1 to 0.061 W m(-1) K-1, and density was reduced from 0.4562 g cm(-3) to 0.2731 g cm(-3).
机译：全芳香族聚酰亚胺（PIs）由于具有优异的综合性能和复杂的结构而受到广泛关注。由于溶解度和不溶性差，以及制备过程对环境不友好等缺点，它仍然是一个挑战。在这里，聚酰胺酸（PAA）与有机胺在水中反应制备了聚酰胺酸盐（PAAS）水凝胶。PAAS水凝胶具有显著的流变性能，可用于直接墨水书写3D打印。印刷品最终被转换成具有突出机械性能和热稳定性的高性能PI对象。不仅如此，其优点还包括制备简单、有机溶剂少、热亚胺化温度低（250℃）、宏观结构和多孔结构可控，并且目前的PAAS 3D打印PI有望显著提升其应用潜力。在本研究中，经过结构设计和3D打印后，PI对象的导热系数（100℃）从0.102 W m（-1）K-1降低到0.061 W m（-1）K-1，密度从0.4562 g cm（-3）降低到0.2731 g cm（-3）。

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  • 来源
    《Journal of Applied Polymer Science》 |2021年第28期|共9页
  • 作者

    Qin Shiyu; Jiang Yu; Ji Zhongying; Yang Chang; Guo Yuxiong; Zhang Xiaoqin; Qin Hongling; Jia Xin; Wang Xiaolong;

  • 作者单位

    Shihezi Univ Sch Chem &

    Chem Engn Key Lab Mat Oriented Chem Engn Xinjiang Uygur Aut Shihezi 832003 Peoples R China;

    Shihezi Univ Sch Chem &

    Chem Engn Key Lab Mat Oriented Chem Engn Xinjiang Uygur Aut Shihezi 832003 Peoples R China;

    Chinese Acad Sci Lanzhou Inst Chem Phys State Key Lab Solid Lubricat Lanzhou 730000 Peoples R China;

    China Three Gorges Univ Hubei Key Lab Hydroelect Machinery Design &

    Maint Yichang Peoples R China;

    Chinese Acad Sci Lanzhou Inst Chem Phys State Key Lab Solid Lubricat Lanzhou 730000 Peoples R China;

    Chinese Acad Sci Lanzhou Inst Chem Phys State Key Lab Solid Lubricat Lanzhou 730000 Peoples R China;

    China Three Gorges Univ Hubei Key Lab Hydroelect Machinery Design &

    Maint Yichang Peoples R China;

    Shihezi Univ Sch Chem &

    Chem Engn Key Lab Mat Oriented Chem Engn Xinjiang Uygur Aut Shihezi 832003 Peoples R China;

    Shihezi Univ Sch Chem &

    Chem Engn Key Lab Mat Oriented Chem Engn Xinjiang Uygur Aut Shihezi 832003 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 高分子化合物工业（高聚物工业）;
  • 关键词

    manufacturing; polyimides; porous materials; synthesis and processing techniques;

    机译：制造;聚酰亚胺;多孔材料;合成和加工技术;

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