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丰富的纤维素材料的化 - 一个动力上被困的状态

Farhiya Alex Sellman¹, Tobias Benselfelt², Per Tomas Larsson³

¹KTH Royal Institute of Technology, Department of Fiber and Polymer Technology, 11428 Stockholm, Sweden; KTH Royal Institute of Technology, Department of Fiber and Polymer Technology, Wallenberg Wood Science Center (WWSC), 11428 Stockholm, Sweden.

Carbohydrate polymers

|July 21, 2023

概括

化,即纤维素的不可逆转的干燥,是一个取决于时间和温度的过程. 了解这种纤维素-纤维素相互作用可以改善纸和纸制造和材料可回收性.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
生物材料工程生物材料工程

背景情况:

纤维素与纤维素的相互作用,特别是在干燥过程中,人们对其了解甚少.
干燥引起的纤维素结合,称为角化,通常被认为是不可逆转的.
澄清角化机制对于纸和造纸行业,材料特性和纤维素可回收性至关重要.

研究的目的:

研究纤维素纳米纤维 (CNF) 薄膜中角化背后的机制.
建立在热处理后的重新膨胀特性,结构特征和化学/机械分析之间的相关性.
为了确定时间和温度对角化的影响.

主要方法:

将CNF薄膜进行各种热处理.
分析重新生长的特性.
进行结构,化学和机械分析.

主要成果:

观察到CNF膜重新膨胀的明显时间和温度依赖,表明不同程度的角化.
角化程度因纤维素纤维的化学成分而异.
结果表明,角化与扩散过程有关,并且在动力上受到限制,在长时间内,重新膨胀能力缓慢增加,这意味着没有达到平衡.

结论:

建议化是一种动态有限的现象,由非共价可逆相互作用驱动.
这些相互作用的形成和断裂表现出时间和温度的依赖.
这种理解可以为新的干燥技术提供信息,并提高基于纤维素的材料性能和可回收性.

关键词:

聚合聚合是一种聚合.纤维素纳米纤维的纤维素.化 (Hornification) 是一种对象.运动学运动学胀胀胀在

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