新型脂肪酸基功能聚酰胺及其超强自主愈合材料的构筑

Fatty acids are abundant biomass and have become an important competitor to fossil resources with the foreseeable depletion of petroleum feedstocks and increased demand for biodegradable and sustainable products. However, the development and application of fatty acid based polyamides are still limited, due to the lack of high purity synthons and high performance polymeric materials. Recently, the author has developed a facile strategy to synthesize soybean oil derived monomers and their side chain polymers via robust amidation and subsequent polymerization. In this proposal, the efficient amidation reaction is applied in the preparation of poly(hydroxylamide) via one pot method. Moreover, a series of fatty acid based synthons with high purity will be developed. Functional polyamides are then synthesized via thiol-ene addition polymerization or acyclic diene metathesis polymerization. We will study the effect of polymerization methods and conditions on the molecular weight. The crystallization behavior, rheological property, and mechanical property of these functional polyamides will be characterized, and the structure-property relationships will be highlighted. These should help us to uncover knowledge on how to design and prepare self-healing materials with high mechanical strength.

脂肪酸基高分子材料是实现生物质高值化利用和发展可持续经济的重要研究内容。脂肪酸基聚酰胺性能优异，然而其高纯度合成子的获得、高分子量聚合物的制备、功能性材料的设计合成仍是当前亟待解决的难题。本项目将在前期高效氨解植物油制备单体和侧链高分子的基础上，开发新型脂肪酸基合成子，探索从脂肪酸到高纯度合成子转化过程中的关键科学问题。创新聚合方法制备基于脂肪酸的聚羟基酰胺，研究聚合反应机理。利用“巯基-烯烃”点击聚合和非环二烯烃易位聚合制备一系列新型功能聚酰胺，探明聚合方法和聚合条件对功能聚酰胺分子量的影响，揭示其结构与性能之间的本质关系。通过优化分子结构设计，实现对晶体形貌和玻璃化转变温度的精确调控，最终获得超高强度自主愈合材料，并阐明其形成机理。本项目的实施一方面将为新型功能聚酰胺的制备开创新思路，另一方面将推动高强度自主愈合材料的发展，因此具有重要意义。

本项目在前期高效氨解植物油制备单体和侧链高分子的基础上，开发系列新型脂肪酸基合成子UDA,AUDA,BUDA,IBUDA等。探索从脂肪酸到高纯度合成子转化过程中的关键科学问题，创新聚合方法制备基于脂肪酸的聚羟基酰胺，研究聚合反应机理。利用“巯基-烯烃”点击聚合和非环二烯烃易位聚合制备一系列新型功能聚酰胺，探明聚合方法和聚合条件对功能聚酰胺分子量的影响，揭示其结构与性能之间的本质关系。通过优化分子结构设计，实现对晶体形貌和玻璃化转变温度的精确调控，最终获得超高强度自主愈合材料，并阐明其形成机理。同时在此理论基础上，开发新型功能聚酰胺，增加脂肪酸基聚酰胺高值化利用。本项目的实施为新型功能聚酰胺的制备开创了新思路，同时将推动高强度自主愈合材料的发展。