从纳米纤维素薄膜上合成的可逆光响应性疏水涂层,用于包装应用
Pallabi Sinha Roy1,2, Naghmeh Nasiri1, Antonio F Patti1,2
1Bioresource Processing Research Institute of Australia (BioPRIA), Department of Chemical and Biological Engineering, Monash University, Clayton, VIC, 3800, Australia.
ChemSusChem
|November 8, 2024
概括
这项研究引入了纸包装的新可再生涂层,增强了它对水分和氧气的屏障性能. 创新的疏水涂层也可回收,为塑料提供可持续的替代品.
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
- 聚合物科学 聚合物科学
背景情况:
- 纸包装是塑料的可持续替代品,但其屏障性能不佳.
- 提高屏障性能和可回收性对于扩大纸张在包装中的使用至关重要.
研究的目的:
- 开发一种具有改进屏障性能的新型可再生纤维素化合物.
- 为了为纤维素纳米纤维薄膜创建一种疏水,光可逆的涂层.
- 为了使纸质包装材料的再加工和回收.
主要方法:
- 从二甲醇和素衍生性化物合成了一种四功能单体,具有光响应的不和双键.
- 在纤维素纳米纤维 (CNF) 薄膜上沉积了这种单体的薄涂层.
- 利用紫外线辐射创建一个可逆交联网络.
主要成果:
- 涂层的CNF薄膜表现出增强的疏水性 (接触角度为93.1°) 和显著降低的水蒸气传递率 (16 g/m2/day).
- 涂层还赋予了油性质,有利于食品包装.
- 可逆光反应允许在更高能量的紫外线暴露时,交联网络的破坏,从而使再处理成为可能.
结论:
- 一种新的,可再生的,可回收的疏水涂层已成功开发用于纤维素纳米纤维膜.
- 这种复合材料表现出优越的屏障性能和可持续包装应用的潜力.
- 采用的绿色合成方法对环境的影响很低 (E因子为0.9).
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