Research on surface modification and functionalization of cellulose nanocrystals (CNCs) is an important direction in the current field of nanomaterials. Since the surface of cellulose nanocrystals is rich in hydroxyl groups, its chemical activity is high, it can be modified and functionalized through various methods, thereby improving its dispersibility, hydrophilicity, interface compatibility and other properties, making it in many fields The application potential has been greatly improved. 1. Surface modification principle of cellulose nanocrystals The surface of CNC has a large number of hydroxyl groups (–OH), and these functional groups are key sites for surface modification. Introducing new functional groups through chemical reactions can impart specific physical and chemical characteristics to CNC, including hydrophobicity, conductivity, optical activity, etc. The objectives of surface modification include: 1. Improve dispersion: especially in non-polar organic solvents or polymer matrix. 2. Enhanced interface compatibility: Improved and base in composite materials

Cellulose nanocrystals (CNC), nanocellulose (CNF) and microcrystalline cellulose (MCC) are materials of different forms extracted from cellulose. They are different in terms of structure, preparation method, size, characteristics and applications. . The following is a detailed comparison from several aspects: 1. Definition and definition of structural cellulose nanocrystals (CNC, Cellulose Nanocrystals): CNC is a rigid and highly crystalline nanometer extracted from natural cellulose through chemical or enzymatic methods. Crystal part. Structure: highly ordered crystalline regions in cellulose chains with rod-shaped or needle-shaped morphology. Size: Diameter 5-20 nm, length 100-300 nm, high crystallinity (>80%). Nanofibrils (CNF, Cellulose Nanofibrils) definition: CNF is the deconstruction of cellulose into

Nanofibers are an important nanomaterial and have attracted much attention due to their high specific surface area, excellent mechanical properties and wide application potential. The preparation of nanofibers by biological methods has the advantages of green environmental protection, low energy consumption and high controllability. Natural resources and biotechnology such as microorganisms, plants or biological enzymes are often used to achieve the preparation of nanofibers. The following is a detailed introduction from the methods, principles and specific steps. 1. Main methods for biological preparation of nanofibers 1. Bacterial cellulose preparation method Bacterial cellulose (BC) is a nanofiber material produced by specific bacteria (such as Bacillus Acetococcus) through the biosynthesis pathway. Principle: Bacteria convert carbon sources such as glucose into bacterial cellulose and secrete them into the culture medium in the form of nanofibers. Advantages: The fiber has high purity, uniform size, excellent mechanical properties, and is suitable for direct use or further processing. Preparation steps: strain culture

The preparation of cellulose nanocomposite coatings mainly relies on the high specific surface area and surface activity of nanocellulose, which can form a uniform dispersion system with various functional materials (such as polymers, metal oxides or carbon-based materials) through specific The coating technology prepares composite coatings to ultimately achieve the required functionality (such as barrier properties, antibacterial properties, electrical conductivity, etc.). 1. Preparation steps for cellulose nanocomposite coating 1. Material preparation nanocellulose raw materials: Cellulose nanocrystals (CNCs), cellulose nanofibers (CNFs) or bacterial cellulose (BC), and choose their form according to your needs. and purity. Functional materials: Select functional additives according to the specific application, such as: polymers (PVA, PLA, epoxy resin, etc.) to enhance adhesion and mechanical properties; inorganic nanoparticles (TiO₂, ZnO, SiO₂) to enhance barrier properties, antibacterial properties or Optical properties; graphene/carbon nanotubes, confer conductivity and heat

Nanocellulose is a nano-scale material derived from natural cellulose. Due to its excellent mechanical properties, lightweight, high specific surface area and environmentally friendly characteristics, it has received widespread attention in the field of reinforced materials. The principle of nanocellulose reinforcement mainly involves its physical, chemical and interface interaction characteristics. The following analysis is from three aspects: structural characteristics, enhancement mechanism and application. 1. Structural characteristics of nanocellulose Nanocellulose includes three forms: cellulose nanocrystals (CNCs), cellulose nanofibers (CNFs) and bacterial cellulose (BC). Their main features include: high strength and high modulus: Nanocellulose has a Young's modulus of up to 138 GPa, which is comparable to steel and is an excellent foundation for reinforcement materials. Nanoscale effect: Nanoscale size brings high specific surface area, which can form good dispersion and interface bonding forces in composite materials. Multifunctional surface chemistry: surface rich

Nanocellulose coating: application of new environmentally friendly and efficient materials. As environmental problems become increasingly serious, the demand for green and environmentally friendly materials is becoming increasingly urgent. As a new, environmentally friendly and efficient material, nanocellulose coating is attracting attention from various industries. As a natural plant-derived material, nanocellulose not only has excellent mechanical properties but also biodegradable, making it an ideal alternative to traditional coating materials. This article will discuss the advantages, applications and future development prospects of nanocellulose coatings. What is nanocellulose? Nanocellulose (NFC) is a nanoscale cellulose extracted from plants. After physical or chemical treatment, its fibers exhibit extremely strong mechanical properties, high surface area and excellent biocompatibility. Due to these unique properties, nanocellulose is gradually increasing in applications in the fields of coatings, composite materials, electronic products, etc. Advantages of nanocellulose coatings Environmental protection and green materials: nanocellulose

Nanocellulose (NFC) is a high-performance material derived from natural plants. Because of its high strength, good biodegradability and environmental protection, it is widely used in food packaging, textiles, coatings and other fields. Nanocellulose is usually obtained through the dispersion state in aqueous solution, but how to efficiently obtain nanocellulose solid materials from aqueous solution is a key issue in the production process. This article will introduce several commonly used methods, basic steps and precautions for obtaining nanocellulose solids from aqueous solutions. What is nanocellulose? Nanocellulose is nanoscale cellulose extracted from plants and its size is usually within the nanoscale (1-100 nanometers). Due to its unique microstructure, nanocellulose has excellent mechanical properties, transparency, thermal stability and biodegradability. Nanocellulose has good dispersion in water, but for further processing and application, it is necessary to extract solid form from aqueous solution.

Nanocellulose (NFC) is a high-performance material obtained by processing and extraction of natural plant cellulose, and is widely used in green packaging, coatings, medical materials and other fields. Compared with traditional cellulose, nanocellulose has significant advantages in dispersibility, strength, transparency and biodegradability. Preparation of nanocellulose crystals is an important step, especially in the research and application of nanomaterials, the crystallinity of nanocellulose is one of the key factors that determine its performance. What are nanocellulose crystals? Nanocellulose crystals are microcrystal structures formed by cellulose molecules arranged in a highly ordered manner. They usually have strong mechanical strength, rigidity, heat resistance and low density. Nanocellulose crystals show a wide range of application potential in a variety of fields, especially in the manufacture of reinforced materials and high-performance composites. Common methods for preparing nanocellulose crystals. Process for preparing nanocellulose crystals

As an emerging nanomaterial, nanocellulose has been widely used in many fields due to its unique mechanical properties, good biocompatibility and environmental friendliness. The following is an introduction to the main uses of nanocellulose. 1. The field of biomedical nanocellulose has shown extremely high application value in biomedical: Tissue engineering: The fibrous structure and good biocompatibility of nanocellulose make it an ideal tissue engineering scaffold material. It can simulate the extracellular matrix of human cells, promote cell adhesion and growth, and help repair and regenerate damaged tissue. Wound dressing: Nanocellulose has good hygroscopicity and breathability, which can accelerate wound healing and prevent infection. Its soft structure makes it skin friendly and is widely used in medical dressings. 2. The application prospects of food packaging material nanocellulose in food packaging are broad. Due to its high strength and transparency, nanocellulose can enhance the machinery of packaging materials

Nanofiber materials have received widespread attention in many fields due to their unique properties. The following is a detailed introduction to the performance of nanofiber materials. 1. The high specific surface area of ​​nanofiber materials The high specific surface area of ​​nanofiber materials imparts excellent adsorption performance, which gives it advantages in the fields of environmental governance, medical adsorption and bioengineering. For example, in water purification, nanofiber materials can efficiently adsorb pollutants in water, significantly improving the water treatment effect. 2. Good mechanical strength and toughness Although nanofiber materials have a fibrous microstructure, they usually have high mechanical strength and good toughness. This makes it perform excellently in filter materials, reinforced composite materials and medical dressings. Especially in filtration applications, nanofiber materials can achieve efficient filtration through fine pore sizes and strong structures. 3. Excellent conductivity and thermal conductivity nanofiber materials have good conductivity and thermal conductivity, so