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赋予具有内在的自我愈合特性,使用基于硫氨酸的聚合物

Afreen Shagufta^1,2,3,4, Lei Wang^1,2,3,4, Senbiao Fang^1,3,4

¹Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences Qingdao 266101 China.

|August 20, 2024

概括

本研究介绍了一种新型的自我修复聚合物网络,使用双交叉链接来提高材料的可持续性. 这种新材料在环境温度下表现出令人印象深刻的机械强度和自主愈合能力.

科学领域:

聚合物科学聚合物科学
材料科学材料科学材料科学
可持续材料可持续材料

背景情况:

自愈聚合物对于可持续材料开发至关重要.
动态聚合物网络提供自主愈合,但通常需要外部刺激或填充剂,影响性能.
弹性体中的传统交叉连接器限制了材料的性能和寿命.

研究的目的:

开发一个机械坚固,弹性,独立自愈的聚合物网络.
通过避免外部刺激和填充物来克服现有动态网络的局限性.
通过创新的交叉连接策略,增强天然 (NR) 和环氧化天然 (ENR) 的性能.

主要方法:

聚合物链的双交联,使用共价相互作用和非共价相互作用.
在天然和环氧化天然混合物 (NR-ENR-PTUEG3) 中加入一种基于硫尿素的聚合物 - - 聚乙烯基醇 (PTUEG).
利用氨酸连接用于键和动态共价相互作用,以创建一个可适应的网络.

主要成果:

与原始NR相比,NR-ENR-PTUEG3复合材料表现出明显改善的机械性能,拉力应力为4.8 ± 0.3 MPa,断裂时的延长为833 ± 0.1%.
在环境温度下达到原始强度的85%恢复,证明了有效的自主自我愈合.
自愈效率和机械完整性与基氨酸基聚合物含量直接相关.

结论:

开发的双交联聚合物网络为创建强大,弹性和自主自我修复材料提供了有前途的途径.
该材料具有出色的机械性能和寿命,延长了制品的使用寿命.
这种方法使修理材料在现场具有承载能力,在治愈后保持基本的机械特性.

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