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弱相互作用驱动的制备负波桑比率生物基聚胺气凝,没有化学交叉连接

Caihong Gong¹, Zhao Liu¹, Shaoji Wu¹

¹School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, PR China.

Journal of colloid and interface science

|September 30, 2025

概括

这项研究引入了新的聚胺气凝 (PIAs),用于航空航天应用,具有增强的机械性能和绝热性能. 这些生物基PIA提供了卓越的冲击吸收和灵活的压力传感能力.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
纳米技术纳米技术

背景情况:

聚胺气凝 (PIAs) 由于弹性和冷稳定性,对航空航天至关重要.
在PIA中高孔隙性往往会损害机械完整性和骨干支.
开发具有改进机械性能和多功能性的PIA是必不可少的.

研究的目的:

设计和合成具有增强机械性能和热绝缘的新型聚胺气凝 (PIA).
调查用于航空航天和传感应用的这些新型PIA的结构-属性关系.
开发具有集成减震,压力传感和隔热的生物基聚合物材料.

主要方法:

基于大基的分化氧化聚胺 (PI) 被合成为宏分子框架.
采用冷二甲基硫氧化物 (DMSO) 晶体生长驱动的策略来进行有序的孔隙结构构建.
描述包括机械测试,导热量测量和压力传感评估.

主要成果:

开发的PIA具有六角形结构,具有负波桑比率 (-0.35).
它表现出高能耗 (270.04 kJ/m3),广泛的阻尼峰值,以及低的导热率 (24 mW·m−1·K−1).
该材料能够承受高压缩 (250kPa在95%应变) 并在压力传感 (0.48s/0.60s) 中表现出快速响应/恢复.

结论:

新型PIA具有出色的弹性,抗冲击性能和绝热性能.
生物基PIA适用于灵活的压力传感应用.
这种方法为创造适用于苛刻环境的先进聚合物材料提供了可行的途径.

关键词:

生物基聚合物化物通过气结合,形成了气结合.自我交叉连接自我交叉连接传感器传感器传感器

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