<br>对齐的再生纤维素薄膜具有增强的机械和光学性能，用于光管理,Colloids and Surfaces A: Physicochemical and Engineering Aspects

当前位置： X-MOL 学术 › Colloids Surf. A Physicochem. Eng. Aspects › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

对齐的再生纤维素薄膜具有增强的机械和光学性能，用于光管理
Colloids and Surfaces A: Physicochemical and Engineering Aspects ( IF 4.9 ) Pub Date : 2023-06-30 , DOI: 10.1016/j.colsurfa.2023.131985
Weizhi Zhu , Jilun Guan , Wenjing Li , Huayang Fang , Mei He , Jianping Sun , Yiqiang Wu , Yanqiu Zhu , Fangchao Cheng

纤维素的溶解赋予了绿色环保的纤维素材料广泛的加工性能，进一步增强了其作为基础材料的优势。然而，其机械性能和功能的不理想严重限制了其实际应用。在此，开发了一种简便的分子取向策略，以定向氯化锂/N,N-二甲基乙酰胺体系中溶解的纤维素的聚集结构，并获得高性能薄膜。制备过程中通过交联、拉伸、热压等方法对纤维素分子链的定向结构进行锚定、定向和固定。形态分析证实，本工艺可以生产具有显着机械和光学性能的定向微结构纤维素膜。拉伸比为50%时获得的最佳薄膜表现出145.9MPa的高机械强度和86.2%的高透光率。与未拉伸样品相比，拉伸薄膜表现出更高的热稳定性、更高的机械强度（高达纯纤维素薄膜的169%）以及更强的光偏振和散射响应。本策略基于纤维素聚集体结构的调控，为开发具有优异性能和多功能特性的先进再生纤维素材料提供了一种有前景的方法。

"点击查看英文标题和摘要"

Aligned regenerated cellulose films with enhanced mechanical and optical properties for light management

The dissolution of cellulose endows the green and environmentally friendly cellulosic material with a wide range of processing properties, further enhancing its advantages as a basic material. However, its unsatisfactory mechanical performance and functionality severely limited its practical application. Herein, a facile molecular orientation strategy was developed to orient the aggregated structure of the dissolved cellulose in the lithium chloride/N,N-dimethylacetamide system and to obtain high-performance films. During the preparation process, cross-linking, stretching, and hot pressing were utilized to anchor, orient, and fix the orientated structure of the cellulose molecular chains. Morphological analysis confirmed that the present process can produce an oriented microstructure of cellulose films with remarkable mechanical and optical properties. The optimal film obtained with a stretching ratio of 50 % exhibited a high mechanical strength of 145.9 MPa, and a high light transmittance of 86.2 %. Compared to the unstretched sample, the stretched films showed higher thermal stability, much higher mechanical strength (up to 169 % of the pure cellulose film), and stronger light polarization and scattering response. The present strategy, based on the regulation of cellulose aggregate structure, provides a promising approach for the development of advanced regenerated cellulose materials with excellent performance and multifunctional properties.

更新日期：2023-06-30

点击分享查看原文

点击收藏

阅读更多本刊新发论文