大学化学 >> 2022, Vol. 37 >> Issue (5): 2109106.doi: 10.3866/PKU.DXHX202109106

所属专题: 第2届全国大学生化学实验创新设计竞赛

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高温形状记忆聚酰亚胺的合成

杜淏霖, 朱文慧, 黄海, 李冰, 肖鑫礼(), 李欣()   

  • 收稿日期:2021-09-29 录用日期:2021-11-04 发布日期:2022-03-08
  • 通讯作者: 肖鑫礼,李欣 E-mail:xiaoxinli@hit.edu.cn;lixin@hit.edu.cn
  • 作者简介:李欣, Email: lixin@hit.edu.cn
    肖鑫礼, Email: xiaoxinli@hit.edu.cn
  • 基金资助:
    黑龙江省自然科学基金项目(LC2018023)

Synthesis of High-Temperature Shape Memory Polyimide

Haolin Du, Wenhui Zhu, Hai Huang, Bing Li, Xinli Xiao(), Xin Li()   

  • Received:2021-09-29 Accepted:2021-11-04 Published:2022-03-08
  • Contact: Xinli Xiao,Xin Li E-mail:xiaoxinli@hit.edu.cn;lixin@hit.edu.cn

摘要:

作为一种典型的智能材料,形状记忆聚酰亚胺(Shape Memory Polyimide,SMPI)因其优异的高温形状记忆效应和做功能力,在航空航天和智能光电等尖端领域展示了广阔的应用前景。本实验通过设计一种简单、有效的装置实现无水无氧条件,以1, 3-双(3-氨基苯氧基)苯与4, 4’-氧代双邻苯二甲酸酐为原料合成聚酰胺酸前驱体,采用梯度升温法制得SMPI。通过凝胶色谱、红外光谱、动态热机械分析和热重分析等方法对产物进行表征。所得SMPI呈现优异的形状记忆效应,高温下可推翻超过自身重量11.93倍的金属板,具有良好的做功能力。本实验涵盖了高分子化学合成、产物结构表征、力学性能测试及应用,具有较强的综合性;此外,实验现象稳定、重现性好,适合本科实验教学。通过模拟“天问一号”红旗的展开,激发学生科研兴趣,培养创新思维,提高综合素质;同时让学生领略到中国航天的独特风采,增强民族自豪感。

关键词: 形状记忆聚合物, 聚酰亚胺, 空间可展开结构, 高温驱动器

Abstract:

Shape memory polyimide (SMPI) as a smart material has attracted remarkable attention in high-tech fields such as aerospace and intelligent photoelectricity due to its shape memory effect and work capability at high temperatures. By designing the simple and effective device to obtain water-free and oxygen-free conditions, the polyamic acid (PAA) precursor is produced from polycondensation of 1, 3-bis(3-aminophenoxy)benzene and 4, 4'-oxydiphthalic anhydride, and then PAA is converted into SMPI via step-wise thermal curing. SMPI was characterized using gel permeation chromatography, infrared spectrometry, dynamic mechanical analysis, and thermogravimetric analysis. SMPI exhibits excellent shape memory effects and good work capability, indicated by overturning a metal sheet 11.93 times higher than its own weight. This highly comprehensive experiment incorporates polymer synthesis, product characterization, mechanical property testing, and applications. Due to stable experimental phenomena and reproducible results, this experiment is suitable for undergraduate teaching. Through simulating the deployable process of red flag in Tianwen-1, this experiment can stimulate scientific interest, cultivate innovative thinking, and enhance students' comprehension. It can also make students appreciate the unique style of aerospace in China and enhance national pride.

Key words: Shape memory polymers, Polyimide, Deployable space structure, High-temperature actuator

MSC2000: 

  • G64