At present, green, safety and purity have become the core themes of the upgrading of the global daily chemical and personal care industries. With the overall improvement of consumers' awareness of the safety of skin care and care, and the continuous implementation of environmental compliance policies such as the global microplastic ban and the reduction of chemical raw materials, the traditional daily chemical formulation system that relies on synthetic additives, petrochemical-based raw materials, and plastic pearlescent powders has been unable to adapt to the high-quality development needs of the industry. Nanocellulose prepared from biomass such as natural wood and plant fiber is a new green functional substrate that has been rapidly industrialized in recent years. With its excellent biocompatibility, unique nanometer three-dimensional structure and multi-functional formula adaptability, this material can fully cover the mainstream daily chemical tracks such as skin care, cleansing and makeup, and effectively solve the pain points of traditional products such as irritation and sensitization, heavy skin feel, unstable system, and poor environmental protection. It has become the core new material driving formula innovation and green iteration in the daily chemical industry. Nanocellulose used in mainstream applications in the field of daily chemicals is divided into fiber

When traditional chemical materials face environmental bottlenecks and high-end synthetic materials are subject to high energy consumption and non-renewable properties, the new materials industry is ushering in a technological change that 'returns from artificial synthesis to nature.' As the core representative of biomass nanomaterials, nanocellulose has broken through the three core barriers of renewable natural resources, high nano-performance empowerment, and low carbon throughout the life cycle. With a native substrate derived from plants, it has achieved mechanical properties and functional attributes comparable to high-end artificial materials, and has become a core key material for iterative upgrades in the current fields of new energy, biomedicine, green manufacturing, and high-end composite materials. 1. Basic definition of materials Nano-upgraded natural fibers Cellulose is the most abundant natural polymer resource on earth. It is widely found in biomass raw materials such as wood, bamboo fiber, crop straw, cotton and linen, and is the green substrate with the longest history of human application. Limited by micron-scale size and single structural characteristics, traditional cellulose materials have long been limited to papermaking.

Driven by the wave of green consumption and new beauty safety regulations, the color cosmetics industry is accelerating its transition away from traditional chemical raw materials and transforming into a safe, hypoallergenic, natural and sustainable product with refined makeup effects. Traditional cosmetics commonly have industry pain points such as plastic microbead glitter, artificial pearlescent, irritating auxiliary residues, poor powder conformability, imbalance of makeup longevity and breathability, etc., which have long plagued brand R&D and consumer experience. Relying on the development of natural biomass preparation technology, high-quality, cosmetic-specific nanocellulose substrates have gradually been industrialized, effectively solving the application shortcomings of traditional chemical raw materials, and becoming the core new material for achieving green product upgrades and formula innovation in the current cosmetics field. Compared with daily chemical segments such as skin care and cleansing, the technological innovation value, application space and market substitutability of nanocellulose in the cosmetics track are more prominent. This article focuses on the field of cosmetics and systematically explains the core adaptability characteristics, full category application scenarios, and technology of nanocellulose.