单体类型对聚乙烯酸盐的合成和性能的影响)
Johan Stanley1, Zoi Terzopoulou1, Panagiotis A Klonos1,2
1Laboratory of Chemistry and Technology of Polymers and Colors, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece.
Polymers
|June 28, 2023
概括
这项研究使用2,5-二酸 (FDCA) 产生了高分子量生物基聚乙烯酸 (PEF),非常适合食品包装. 较高的分子量PEF增强了刚性,降低了氧气的透性,并改善了材料的性能.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 可持续的高分子.
背景情况:
- 对以石油为基础的塑料的可持续替代品的需求日益增长.
- 在食品包装应用中需要高性能聚合物.
- 聚乙烯酸 (PEF) 作为一个有前途的生物基聚.
研究的目的:
- 为了合成高分子量生物基聚乙烯酸 (PEF).
- 评估合成参数对PEF属性的影响.
- 在食品包装中建立PEF的结构-属性关系.
主要方法:
- 使用2,5-二碳酸 (FDCA) 和二甲基2,5-二碳酸盐 (DMFD) 合成PEF.
- 优化单体类型,摩尔比率,催化剂,时间和温度.
- 使用差分扫描热度计 (DSC),X射线衍射 (XRD),介电光谱学和纳米沉积的表征.
主要成果:
- 在高分子量PEF合成方面,FDCA表现出比DMFD更高的有效性.
- 增加的分子量与增强的刚性,减少的氧气透性和改善的水友性相关.
- 无形PEF表现出更高的玻璃化过渡温度 (82-87°C);化样本表现出降低的晶度与增加的粘度.
- 在较低的粘度下,由于强烈的分子间相互作用和结晶性,纳米印显示出更高的硬度和弹性模量.
结论:
- 从FDCA合成的生物基PEF为先进的食品包装提供了可调节的特性.
- 分子重量和结晶性是影响PEF机械和屏障性能的关键因素.
- 优化PEF生产可以带来具有卓越性能特性的可持续材料.
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