一种简单的方法,使用甲基纤维素和有机溶解的红素生产疏水生物基涂层
Kourosh Mobredi1, Isaac Y Miranda-Valdez1, Tero Mäkinen1
1Complex Systems and Materials, Department of Applied Physics, Aalto University, P.O. Box 15600, FI-00076 Aalto, Espoo, Finland. tero.j.makinen@aalto.fi.
Soft matter
|July 8, 2024
概括
这项研究探讨了利用森林材料素来制造可持续的,可生物降解的涂层. 基于素的涂料显示出在保护性包装中替代塑料的潜力,具有防水性能.
科学领域:
- 材料科学 材料科学 材料科学
- 可持续化学 可持续化学
- 生物材料工程 生物材料工程
背景情况:
- 对塑料可持续替代品的需求在各个行业都在增加.
- 保护性涂层是必不可少的,但通常依赖于非生物降解,基于塑料的材料.
- 丰富的生物聚合物 - - 氨酸 - - 未得到充分利用,为生物基材料开发提供了机会.
研究的目的:
- 调查有机溶解性红素在生产可生物降解的防护涂层方面的潜力.
- 为了制定和表征甲基纤维素-质素涂层悬浮剂.
- 评估基于素的涂料的表面特性和湿透性.
主要方法:
- 使用甲基纤维素和有机溶解的红素粉末与水配制涂层悬浮剂.
- 在玻璃晶片上涂层的应用,通过旋转涂层.
- 表面形态 (光学和扫描电子显微镜) 和湿度 (水接触角度实验) 的表征.
- 开发一个数值模型来预测水接触角的演变.
主要成果:
- 最高的初始水接触角度 (114°) 是通过2.5%重量%的素悬浮液实现的.
- 增加宁度超过3.5%的重量导致由于颗粒聚合和缺陷的表面覆盖率下降.
- 数值模型准确地预测了依赖时间的水接触角度,与实验数据保持一致.
- 涂料表现出从吸水性转向防性质的转变.
结论:
- 已经证明了一种实用的方法,可以从森林衍生的木质素制造可调节的生物基涂层.
- 这些基于素的涂层为保护性包装应用提供了可持续的替代方案.
- 这项研究为在电子和食品工业中用环保材料取代聚烯和其他塑料铺平了道路.
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