With the continuous development of green materials and sustainable manufacturing concepts, nanocellulose (Nanocellulose) has gradually become a new bio-based material that has attracted much attention in the leather industry. Nanocellulose is derived from natural cellulose resources. It is renewable, degradable and has excellent physical and chemical properties. It shows broad application prospects in leather processing, functional coatings and environmentally friendly alternative materials. 1. Basic characteristics of nanocellulose Nanocellulose is a nanoscale material obtained by dissociating natural cellulose through mechanical, chemical or biological methods. Its diameter is usually between 5-100 nm, and it has a high aspect ratio and specific surface area. Compared with traditional materials, nanocellulose has the following outstanding advantages: High mechanical strength: Nanocellulose materials have excellent strength and rigidity, which can significantly improve the structural stability of composite materials. Good film-forming properties: Nanocellulose can form a dense film structure and can be used for functional coatings

1. Overview of Nanocellulose Nanocellulose (Nanocellulose) is a nanoscale functional material prepared from natural plant fibers through processes such as high-pressure homogenization, TEMPO oxidation or enzymatic defibration. Its diameter is usually 5–50 nm, has the characteristics of high aspect ratio and high specific surface area, and can form a stable three-dimensional network structure in aqueous systems. Common types include: CNF (Cellulose Nanofiber, nanocellulose fiber) CNC (Cellulose Nanocrystal, nanocrystalline cellulose) BC (Bacterial Cellulose, bacterial cellulose) In daily chemical suspension systems, CNF is more widely used due to its excellent rheological regulation ability and structural support. 2. The core problems faced by daily chemical suspension systems are in products such as shower gel, shampoo, laundry beads, scrubs, and essences.

As the global demand for sustainable materials continues to grow, high-performance materials based on natural resources have gradually become an important direction for research and industrialization. Among them, nanocellulose (Nanocellulose), as a nanoscale material derived from natural cellulose, has received widespread attention in many industrial fields in recent years due to its excellent physical properties, biocompatibility and renewable characteristics. 1. What is nanocellulose? Nanocellulose is a type of nanostructured material obtained by processing natural cellulose (such as wood pulp, cotton, agricultural waste, etc.) through physical, chemical or enzymatic methods. Its diameter is usually 5–100 nm, and its length can reach hundreds of nanometers to several micrometers. According to different structures and preparation methods, nanocellulose is usually divided into three main types: Cellulose nanofiber (CNF, Cellulose Nanofiber) is obtained through mechanical dissociation and has a long fiber structure and high