Water-Stable Flexible Nanocellulose Chiral Nematic Films through Acid Vapor Cross-Linked Glutaraldehyde for Chiral Nematic Templating,ACS Macro Letters

当前位置： X-MOL 学术 › ACS Macro Lett. › 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.)

Water-Stable Flexible Nanocellulose Chiral Nematic Films through Acid Vapor Cross-Linked Glutaraldehyde for Chiral Nematic Templating
ACS Macro Letters ( IF 5.1 ) Pub Date : 2020-01-13 , DOI: 10.1021/acsmacrolett.9b00826
Zahid Hanif , Dongwhi Choi ₁ , Muhammad Zakria Tariq , Moonwoo La , Sung Jea Park

Affiliation

Cellulose nanocrystals (CNCs) have drawn considerable attention for their use in optical and sensor applications due to their appealing properties of chiral nematic photonic structures. However, the flexibility and water instability of neat CNC chiral nematic films are questionable and compromise their outstanding properties. We propose a room-temperature process for fabricating flexible, water-stable chiral nematic CNC films. Aqueous glutaraldehyde (GA) was first mixed with CNCs, and then free-standing films were formed by evaporation-induced self-assembly. The chiral nematic dry films that formed were then exposed to hydrochloric acid vapor for subsequent GA cross-linking with CNCs. The GA cross-linked CNC films had a highly ordered chiral nematic organization. The enhanced water stability of the films was demonstrated by using GA cross-linked CNC films as freestanding template substrates for conducting polymers (polypyrrole) and metal oxides (iron oxide) to form flexible chiral nematic photonic hybrids.

中文翻译：

通过酸蒸汽交联戊二醛制备水稳定的柔性纳米纤维素手性向列膜用于手性向列模板

纤维素纳米晶体 (CNC) 因其具有吸引人的手性向列光子结构特性而在光学和传感器应用中引起了相当大的关注。然而，纯CNC手性向列膜的柔韧性和水不稳定性是有问题的，并损害了它们的出色性能。我们提出了一种用于制造柔性、水稳定性手性向列 CNC 薄膜的室温工艺。首先将含水戊二醛 (GA) 与 CNCs 混合，然后通过蒸发诱导的自组装形成独立薄膜。然后将形成的手性向列干膜暴露于盐酸蒸汽中，用于随后的 GA 与 CNCs 交联。GA交联CNC薄膜具有高度有序的手性向列组织。

更新日期：2020-01-13

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11