1. Overview of Nanocellulose Nanocellulose (Nanocellulose) is a nanoscale material obtained by mechanical or chemical dissociation of natural cellulose, mainly including cellulose nanofibers (CNF) and cellulose nanocrystals (CNC). It has high specific surface area, high aspect ratio and excellent rheological control ability, and has broad application prospects in the field of functional materials. In recent years, with the development of the concept of green materials, nanocellulose has gradually been used as a functional additive in daily chemical formulation systems, especially in suspension systems. 2. Industry Pain Points of Daily Chemical Suspension Systems In washing and care products (such as shower gel, shampoo, scrub, etc.), it is often necessary to add the following components: anti-dandruff particles, fragrance microcapsules, functional active particles, but these particles often have the following problems: 1. Easy to settle. The difference in stratified density causes the particles to sink quickly to the bottom, affecting the appearance and stability of the product. 2. The viscosity of the system is unstable.

1. What is bacterial cellulose? Bacterial Cellulose (BC) is a natural polymer material synthesized by microbial fermentation. Compared with plant-derived cellulose, it does not contain lignin and hemicellulose, has higher purity, and has a nanoscale three-dimensional network structure, high crystallinity and excellent mechanical properties. With these properties, bacterial cellulose has become one of the important research hotspots in the field of biomedical materials in recent years. 2. The core advantages of bacterial cellulose in medical dressings 1. It has both high water retention and breathability. The moisture content of bacterial cellulose can be as high as 99%, which can form a stable moist environment on the wound surface and has good gas exchange capabilities, which is helpful to accelerate wound healing. Keywords: Moist healing, medical dressing materials, bacterial cellulose moisturizing properties 2. Excellent biocompatibility, its source is natural, its structure is pure, it is non-toxic and non-irritating to the human body, and it can effectively reduce inflammatory reactions

With the continuous development of green materials and functional materials technology, structural color (Structural Color) has gradually become an important direction in the research of new generation optical materials. Different from traditional coloring methods that rely on chemical pigments or dyes, structural color is a color formed by the reflection, diffraction and interference of light by the micro-nanostructure inside the material. Therefore, it has the advantages of environmental protection, stability and controllability. In recent years, the natural bio-based material **Nanocellulose** has shown great application potential in the field of structural color materials due to its unique nanostructure and excellent self-assembly properties. 1. Basic principles of structural color Structural color is an optical phenomenon produced by the microstructure of materials. Its color comes from the interaction between light and periodic structures, rather than the color produced by the absorption spectrum of chemical pigments. Many creatures in nature use structural colors to create bright visual effects, such as butterfly wings