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纳米纤维素短自组装,以提高机械强度和屏障性能

Alessandro Marchetti¹, Elisa Marelli¹, Greta Bergamaschi²

¹Laboratory of Supramolecular and Bio-Nanomaterials (SBNLab), Department of Chemistry, Materials, and Chemical Engineering "Giulio Natta", Politecnico di Milano, Via L. Mancinelli 7, 20131 Milano, Italy. claudia.pigliacelli@polimi.it.

Journal of materials chemistry. B

|August 23, 2024

概括

研究人员开发了一种使用来增强纤维素纳米纤维 (CNF) 的新型非共价方法. 这种方法改善了CNF的水凝和薄膜特性,为包装和生物医学应用创造了多功能生物基材料.

科学领域:

材料科学材料科学材料科学
生物材料工程生物材料工程

背景情况:

纤维素纳米纤维 (CNF) 是丰富的可再生资源,在混合材料中越来越多的应用.
目前的方法通常依赖于共价函数化,限制了多功能性.
使用的非共价方法为CNF修饰提供了一条新的途径.

研究的目的:

开发一种非共价策略,用于使用非功能化CNF和添加剂的混合水凝和薄膜.
为了研究短 (DFNKF,DF(I) NKF,DF(F5) NKF) 对CNF特性的影响.
探索材料特征的可调性,如疏水性,可湿性和屏障性质.

主要方法:

使用短作为超分子添加剂与非功能化的CNF.
配制混合液凝,然后通过真空过生产薄膜.
描述质性质,表面湿透性,疏水性和水蒸气屏障性能.

主要成果:

可以显著增强CNF的质性质,甚至在低度 (0.01-0.1%w/w) 中,也可以增加一个数量级以上的动态模块.
CNF-膜表现出量身定制的疏水性和表面湿透性,可根据含量和素类型进行控制.
化 (DF(F5) NKF) 显著改善了水蒸气屏障特性,并减少了CNF膜中的水吸收.

结论:

建立了一个模块化和简单的非共价方法,用于创建生物基CNF-材料.
体的包含允许轻松的功能化和精确的材料特性调制.
这些CNF-材料在可持续包装和先进的生物医疗设备中显示出应用的前景.

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