Miyagi Kazuma, Teramoto Yoshikuni
Department of Forest Resource Chemistry, Forestry and Forest Products Research Institute, Forest Research and Management Organization, 1 Matsunosato, Tsukuba 3058687, Ibaraki, Japan.
Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 6068502, Japan.
Nanomaterials (Basel). 2021 Nov 5;11(11):2969. doi: 10.3390/nano11112969.
Wide use of bio-based polymers could play a key role in facilitating a more sustainable society because such polymers are renewable and ecofriendly. Cellulose is a representative bio-based polymer and has been used in various materials. To further expand the application of cellulose, it is crucial to develop functional materials utilizing cellulosic physicochemical properties that are acknowledged but insufficiently applied. Cellulose derivatives and cellulose nanocrystals exhibit a cholesteric liquid crystal (ChLC) property based on rigidity and chirality, and this property is promising for constructing next-generation functional materials. The form of such materials is an important factor because material form is closely related with function. To date, researchers have reported cellulosic ChLC materials with a wide range of material forms-such as films, gels, mesoporous materials, and emulsions-for diverse functions. We first briefly review the fundamental aspects of cellulosic ChLCs. Then we comprehensively review research on cellulosic ChLC functional materials in terms of their material forms. Thus, this review provides insights into the creation of novel cellulosic ChLC functional materials based on material form designed toward the expanded application of cellulosics.
生物基聚合物的广泛应用在推动社会更加可持续发展方面可能发挥关键作用，因为这类聚合物是可再生且环保的。纤维素是一种典型的生物基聚合物，已被用于各种材料中。为了进一步拓展纤维素的应用，利用其已被认知但应用尚不充分的物理化学性质来开发功能材料至关重要。纤维素衍生物和纤维素纳米晶体基于刚性和手性表现出胆甾相液晶（ChLC）特性，这种特性对于构建下一代功能材料很有前景。这类材料的形式是一个重要因素，因为材料形式与功能密切相关。迄今为止，研究人员已经报道了具有多种材料形式（如薄膜、凝胶、介孔材料和乳液）的纤维素ChLC材料，以实现不同的功能。我们首先简要回顾纤维素ChLC的基本方面。然后，我们从材料形式的角度全面回顾纤维素ChLC功能材料的研究。因此，本综述为基于材料形式设计的新型纤维素ChLC功能材料的创建提供了见解，旨在扩大纤维素的应用。
