In situ mechanical reinforcement of polyimine vitrimer via bioinspired crosslink mineralization,Journal of Applied Polymer Science

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In situ mechanical reinforcement of polyimine vitrimer via bioinspired crosslink mineralization
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2021-08-02 , DOI: 10.1002/app.51479
Song Liang ₁ , Fan Feng ₁ , Zhengshun Jiang ₁ , Bingdi Wang ₁ , Hang Sun ₁ , Guolong Lu ₁ , Jiayi Li ₁ , Zhenning Liu ₁

Affiliation

Polyimines (PI) are vitrimer materials with unique Schiff base dynamic covalent chemistry. Various inorganic micro or nano fillers have been used to enhance the mechanical properties of PI materials. Inspired by natural biomineralization, a novel polyimine vitrimer composite is designed and prepared via a one-pot synthesis. Briefly, diethylenetriamine and glutaraldehyde are used as the monomers of the PI matrix. Then a silica precursor, (3-aminopropyl)trimethoxy silane is employed to develop silica nanoparticles within the formed PI matrix. The in situ generated silica nanoparticles with amine groups could act as the enhancing fillers and the crosslinkers in the artificial biomineralized silica reinforced polyimine composites. The optimized hybrid materials possessed enhanced mechanical properties, heat-driven malleability, and limited recycling ability. Notably, the silica content (11.7%) is crucial to the mechanical performance of the PI matrix. This method may help to pave a new avenue on the simple fabrication of hybrid composites.

中文翻译：

通过仿生交联矿化原位机械增强聚亚胺玻璃体

聚亚胺 (PI) 是具有独特席夫碱动态共价化学的玻璃体材料。各种无机微米或纳米填料已被用于增强 PI 材料的机械性能。受自然生物矿化的启发，通过一锅法合成设计并制备了一种新型聚亚胺玻璃体复合材料。简而言之，二亚乙基三胺和戊二醛用作 PI 基质的单体。然后使用二氧化硅前体（3-氨基丙基）三甲氧基硅烷在形成的 PI 基质中形成二氧化硅纳米粒子。原位生成的具有胺基的二氧化硅纳米粒子可以作为人工生物矿化二氧化硅增强聚亚胺复合材料中的增强填料和交联剂。优化的混合材料具有增强的机械性能、热驱动延展性、和有限的回收能力。值得注意的是，二氧化硅含量 (11.7%) 对 PI 基质的机械性能至关重要。这种方法可能有助于为混合复合材料的简单制造开辟一条新途径。

更新日期：2021-09-27

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