Fabrication of Cross‐Linked Polyimide Hollow Microspheres With Lightweight, Thermal Resistance and Controllable Size

IF 2.5 4区 化学 Q3 POLYMER SCIENCE Macromolecular Chemistry and Physics Pub Date : 2024-08-28 DOI:10.1002/macp.202400227
Yuntao Fu, Haichao Meng, Fenglin Wang, Huawei Zou, Yinfu Luo, Mei Liang, Peng Xie
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Abstract

Polyimide (PI) hollow microspheres possess lightweight and excellent thermal resistance, which are widely used in microreactors, catalysis, adsorption separation, high‐temperature insulation, and so on. In this manuscript, PI hollow microspheres are fabricated by constructing a crosslinked structure combined with gradient heating. The formation of PI hollow microspheres includes gas nucleation, expansion, and imidization. The PI hollow microspheres size is controlled by adjusting polyester ammonium salts size, and microspheres size is distributed in 309–956 µm. PI hollow microspheres have lightweight, excellent heat resistance and carbonization performance, bulk density, initial decomposition temperature, and weight residue at 800 °C is 87.3–178.6 kg m−3, 533.6 °C and 59.8%. The PI hollow microspheres have potential applications in high‐temperature resistant and multifunctional composite materials preparation. Moreover, this method is simple, efficient, and highly operable, which can be used for large‐scale production of PI hollow microspheres.
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制造轻质、耐热、尺寸可控的交联聚酰亚胺中空微球
聚酰亚胺(PI)空心微球具有重量轻、耐热性好等特点,被广泛应用于微反应器、催化、吸附分离、高温绝缘等领域。在本手稿中,通过构建交联结构并结合梯度加热,制备了 PI 空心微球。PI 空心微球的形成过程包括气体成核、膨胀和酰亚胺化。通过调节聚酯铵盐的大小来控制 PI 空心微球的尺寸,微球尺寸分布在 309-956 微米之间。PI 空心微球具有轻质、优异的耐热性和碳化性能,体积密度、初始分解温度和 800 °C 时的残余重量分别为 87.3-178.6 kg m-3、533.6 °C 和 59.8%。该 PI 空心微球在制备耐高温和多功能复合材料方面具有潜在的应用前景。此外,该方法简单、高效、可操作性强,可用于 PI 空心微球的大规模生产。
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来源期刊
Macromolecular Chemistry and Physics
Macromolecular Chemistry and Physics 化学-高分子科学
CiteScore
4.30
自引率
4.00%
发文量
278
审稿时长
1.4 months
期刊介绍: Macromolecular Chemistry and Physics publishes in all areas of polymer science - from chemistry, physical chemistry, and physics of polymers to polymers in materials science. Beside an attractive mixture of high-quality Full Papers, Trends, and Highlights, the journal offers a unique article type dedicated to young scientists – Talent.
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