
Preparation and Application of Cellulose Nanocrystalline Chiral Liquid Crystals
Siyu Li, Yifan Liu, Yuancai Lv, Xiaoxia Ye, Chunxiang Lin, Minghua Liu
Prog Chem ›› 2025, Vol. 37 ›› Issue (5) : 670-685.
Preparation and Application of Cellulose Nanocrystalline Chiral Liquid Crystals
Cellulose nanocrystals(CNCs)are rod-like nanomaterials with high crystallinity obtained from natural cellulose. CNCs suspensions can form iridescent films with chiral nematic structure through evaporation-induced self-assembly(EISA),showing unique optical properties and presenting specific structural colors,which has great application potential in the fields of anti-counterfeiting,sensing,optoelectronics and so on. Due to the abundant,green and renewable feedstock,CNCs has become the first choice of the new chiral materials. In this paper,the formation mechanism,structure and optical properties of CNCs chiral liquid crystals are introduced,the preparation methods of CNCs chiral liquid crystals which are typical at home and abroad in recent years are reviewed,and the structural colors and regulation methods of CNCs chiral liquid crystals are discussed. The application progress of CNCs chiral liquid crystals in the fields of anti-counterfeiting materials,template materials,other functional materials and biomedicine is also summarized. Finally,the challenges and research prospects of CNCs chiral liquid crystals are addressed.
1 Introduction
2 Formation mechanism and structural characteristics of chiral nematic liquid crystals of cellulose nanocrystals
3 Methods for preparing chiral nematic liquid crystals of cellulose nanocrystals
3.1 Sulfuric acid hydrolysis process
3.2 TEMPO oxidation process
3.3 Other oxidation methods
3.4 Organic acid hydrolysis method
4 Structural regulation of chiral nematic liquid crystals in cellulose nanocrystals
4.1 Influence of length-diameter ratio of CNCs
4.2 The influence of external conditions
5 Application of chiral nematic liquid crystals in cellulose nanocrystals
5.1 Anti-counterfeiting material
5.2 Formwork material
5.3 Other functional materials
5.4 Biomedicine
6 Conclusion and outlook
cellulose nanocrystals(CNCs) / chiral liquid crystal / self-assembly
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