Keywords: bacterial cellulose, medical applications, trauma dressings, tissue engineering, artificial blood vessels, drug sustained release, Nanjing Tianlu Nano Technology Co., Ltd. Bacterial cellulose (BC) is a natural nanocellulose material secreted by Acetobacter xylinum and other acetate. Unlike plant cellulose, bacterial cellulose has ultra-high purity (free of lignin and hemicellulose), unique three-dimensional nano-network structure, excellent mechanical properties and good biocompatibility. These characteristics make it have extremely high application potential in the medical and health field. As an early domestic enterprise focusing on the research and development and production of nanocellulose, Nanjing Tianlu Nano Technology Co., Ltd. has long been committed to the process optimization, product application development and industrialization of bacterial cellulose. Through the improvement of fermentation process and the upgrading of post-treatment technology, the company has been able to provide stable and high purity and performance.

Introduction Nanocellulose (NC) is a nano-scale fiber material prepared by mechanical peeling, acid hydrolysis or chemical modification of natural cellulose. Its diameter is usually in the range of 1-100 nm and its length can reach several microns. It has unique advantages such as high specific surface area, high crystallinity, renewable and degradable. With the increase in the demand for green and sustainable materials, nanocellulose has gradually become an important candidate material for the medical and health industry, and its application ranges from basic medical consumables to high-end regenerative medical scaffolds continue to expand. The structural and characteristics of nanocellulose have strong surface chemical activity: its molecular chain is rich in hydroxyl groups, which can be functionally modified through TEMPO oxidation, carboxymethylation, graft polymerization, etc., giving the material controlled release, antibacterial or conductive properties. Excellent mechanical properties: the tensile strength of a single nanofiber can reach 2–6 GPa, Young's mold

Bacterial Cellulose (BC) is a natural polymer material synthesized by specific bacteria. It has high purity, high crystallinity and excellent mechanical properties. It is widely used in the fields of medicine, food, electronic materials and functional membranes. This article will systematically introduce common preparation methods for bacterial cellulose from the aspects of bacterial selection, culture medium formula, preparation method and post-treatment process.

Carboxylated Nanocellulose is one of the hot topics in the research and industrial application of nanomaterials in recent years. It uses natural cellulose as raw materials and introduces carboxylic (–COOH) functional groups on the surface of nanocellulose through chemical modification (such as TEMPO oxidation, carboxymethylation treatment, etc.), thereby significantly improving the dispersion, reactive activity and complex properties of the material with other polymer materials. 1. Principle of preparation of carboxylated nanocellulose. Traditional nanocellulose has a limited number of hydroxyl groups on the surface, and the interfacial compatibility is certainly insufficient. Carboxylation modification makes the C6-position hydroxyl group of cellulose to be added to the surface of the cellulose molecular chain, making it more hydrophilic and chemically active: TEMPO selective oxidation method: using the TEMPO/NaBr/NaClO system as the catalytic system, the C6-position hydroxyl group of cellulose is oxidized to the carboxy group. Carboxymethylation method: through etherification reaction in fiber

Application of nanocellulose in the field of water bombs 1. Introduction Water bombs (hydrogel projectiles) are gel particles formed by a highly absorbent polymer as the main body and after moisture expansion. Due to its high safety, soft touch, and reusable characteristics, it is widely used in children's toys, outdoor real-person confrontation, and non-lethal training equipment for military and police. However, traditional water bomb materials are mainly sodium polyacrylate high-water absorption resins. Although they have strong water absorption capacity, they have problems such as high brittleness, fragility, residual monomers may cause safety hazards and non-degradability. With the rise of the green material industry, nanocellulose, as a renewable nanomaterial derived from natural fibers, is providing new ideas for the performance upgrade and sustainable development of water bombs. 2. Structure and characteristics of nanocellulose Nanocellulose includes cellulose nanofibers (CNF), cellulose nanocrystals (CNC) and bacterial cellulose (BC), with the following typical characteristics: Ultrafine scale: straight

Introduction With the rapid development of renewable resources and green and environmentally friendly materials, nanocellulose (Nanocellulose) has gradually become a hot topic in scientific research and industrial fields due to its advantages such as lightweight, high strength, renewable and degradable. Among them, TEMPO oxidation modification, as an efficient and controllable surface functionalization method, gives nanocellulose more performance and application potential. This article will introduce the principles, characteristics and typical applications of TEMPO oxidized nanocellulose from a popular science perspective. What is TEMPO oxidation? TEMPO (2,2,6,6-tetramethylpiperidin-1-oxygen radical) is an organic radical catalyst. Under basic conditions, TEMPO works together with sodium hypochlorite (NaClO) and sodium bromide (NaBr) to selectively oxidize the primary hydroxyl group at the C6 position of cellulose molecule to carboxyl (–COOH). This reaction has the following advantages: strong selectivity: mainly

Abstract Carboxylated modified Nanocellulose (CNCF) is a functional nanomaterial that introduces carboxylated (–COOH) groups on the cellulose surface by chemical modification. This material has the high strength, high specific surface area and good dispersion of nanocellulose, and imparts better hydrophilicity, reactive activity and interface binding ability under the action of surface carboxyl groups. This article will introduce the preparation methods, key properties, typical application fields and future development trends of carboxylated modified nanocellulose, and provide reference for scientific researchers and related companies. Introduction to carboxylated modified nanocellulose Nanocellulose is a renewable green material derived from natural cellulose, with advantages such as high crystallinity, lightweight, and high strength, and degradability. However, the original nanocellulose has problems such as single surface functional groups, insufficient dispersion, and limited compatibility with other materials. Modification by carboxylation

1. Introduction Nanocellulose (NC) is a green nanomaterial derived from natural cellulose, with high specific surface area, high crystallinity, excellent mechanical properties and renewability. However, natural nanocellulose surfaces are rich in hydroxyl groups and exhibit strong hydrophilicity, which limits its application in non-polar polymers, oily systems and hydrophobic substrates. To this end, scientific researchers and enterprises have transformed their surface into hydrophobic nanocellulose through chemical modification or physical treatment, greatly expanding their application space. Keywords: nanocellulose, hydrophobic modification, esterification, silanization, oil-water separation, composite materials 2. Preparation process of hydrophobic nanocellulose, typical reactants/means, advantages and disadvantages of esterification reaction, fatty acid anhydride, stearic anhydride, isocyanate process mature, significant part of the hydrophobic reaction requires organic solvent silanization to modify triethoxyoctylsilane and methyl trichlorosilane hydrophobic long-lasting, suitable for

Driven by the wave of green technology and sustainable development, nanocellulose, as a nano-scale material derived from natural cellulose, is becoming a 'star material' in the field of materials science with its high specific surface area, high strength and biodegradability. However, the strong hydrophilicity imparted by its rich hydroxyl groups on the surface has become a key bottleneck limiting its application in non-polar media. The hydrophobic modification technology imparts nanocellulose waterproof, oil-proof and compatible characteristics with hydrophobic substrates, which is becoming the core path to unlock its high-value applications. 1. Technical breakthrough: Three major modification paths to build a hydrophobic barrier (I) Physical adsorption: Green and efficient surface modification physical adsorption method loads hydrophobic substances such as surfactants, quaternary ammonium salts or copolymers on the surface of nanocellulose through weak interactions such as van der Waals forces and hydrogen bonds. Team from Tianjin University of Science and Technology uses cationic surfactant cetyltrimethylammonium bromide (CTAB) to modify cellulose nanocrystals

Application cases of nanocellulose hydrophobic modification: Green solution for upgrading performance of water-based coatings. With the widespread application of water-based coatings in the fields of construction, wood, industrial and functional membranes, water resistance, coating film stability and storage stability have become important factors that restrict performance. The hydrophobic modified nanocellulose developed by Nanjing Tianlu Nano Technology Co., Ltd. has achieved a significant improvement in the performance of water-based coatings through surface chemical modification. The following are specific application cases and comparison analysis. Case 1: Experimental design for improving performance of water-based wood paint: Add 1% hydrophobic modified nanocellulose dispersion to the water-based wood paint, and compare the reference paint without nanocellulose added. Indicators: Non-added nanocellulose added hydrophobic modified nanocellulose enhances the effect of coating hardness HB2H+2 grade water resistance (24 hours of water immersion) paint film expands, slightly bubbled paint film complete, no expansion significantly improves sagging, medium-sized excellent construction, smooth construction significantly improves storage stability for 3 months, easy settlement and stratification 1