从生物质衍生的基聚醇-A绿色替代品开发生物聚氨涂料
Tiago A R Silva1, Ana C Marques2, Rui G Dos Santos2
1Centro de Química Estrutural (CQE), Institute of Molecular Sciences (IMS), Departamento de Engenharia Química (DEQ), Instituto Superior Técnico (IST), Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal.
Polymers
|June 10, 2023
概括
来自松木和Stipa tenacissima的生物基聚醇可以产生可持续的聚氨涂层. 来自松木的涂料为碳钢提供了优越的防腐蚀保护,显示了环保应用的巨大潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 绿色化学 绿色化学
- 腐蚀科学 腐蚀科学
背景情况:
- 为减少对环境的影响,开发替代石油材料的可持续替代品至关重要.
- 生物基聚合物来源于基纤维素生物质,为聚合物合成提供了一个有前途的可再生资源.
- 聚氨涂层广泛用于保护金属基板,但传统配方依赖化石燃料.
研究的目的:
- 合成和表征来自松木和Stipa tenacissima的生物基聚醇.
- 使用这些聚醇和一种生物基聚酸,生产生物基聚氨 (BioPU) 涂层.
- 评估BioPU涂料的性能,重点关注其化学结构,热稳定性,疏水性,粘附性和防腐能力.
主要方法:
- 松木和Stipa tenacissima的热化学液化,以获得生物基聚.
- 使用ATR-FTIR和NMR光谱学对多的表征.
- 在碳钢上制备和应用BioPU涂层.
- 评估涂层性能,包括热稳定性,接触角度 (疏水性),拉脱粘合强度和电化学阻抗光谱 (EIS) 以防腐蚀.
主要成果:
- 成功生产了含有基功能组的高转化率 (71.979.3 wt.%) 的生物基聚.
- 开发的BioPU涂层具有适度的热稳定性 (高达100°C) 和轻微的疏水性 (接触角度68°86°).
- 在盐水条件下60天后,与Stipa衍生的BioPU相比,获得了良好的腐蚀保护,松木衍生的BioPU表现显著更高的性能 (规范阻抗模量为6.1 × 10^10 Ω cm).
结论:
- 来自松树和Stipa tenacissima的生物基聚醇是生产可持续聚氨涂层的可行前体.
- 开发的BioPU涂层表现出良好的粘附性和耐腐蚀性,特别是来自松木的配方.
- 这些发现凸显了这些BioPU涂料在环保应用中的潜力,使用生物基添加剂进一步增强的可能性.
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