Classification of nanocellulose

Nanocellulose is a nano-scale material made of cellulose, with various excellent properties and a wide range of application prospects. According to the morphology and preparation method, nanocellulose can be divided into the following categories:

1. Cellulose nanofibers (CNF), also known as cellulose microfiber filaments (MFC):

Cellulose nanofibers mainly decompose cellulose fibers into nano-scale fiber networks through mechanical methods such as high-pressure homogenization, grinding or microfluidization. The diameter is usually between 10-100 nanometers and the length can reach a few microns to tens of microns. It has high flexibility and good network structure, and is widely used in films, coatings and reinforced materials.

2. Cellulose nanocrystals (CNC):

Cellulose nanocrystals are nano-scale cellulose fragments with high crystallinity obtained by removing the amorphous region by acid hydrolysis from cellulose. The size is usually tens of nanometers to several hundred nanometers, the diameter is between 5-70 nanometers and the length is between 100 nanometers and a few micrometers. It has high strength, high modulus and biocompatibility and is commonly used for reinforcement of composite materials and as functional nanomaterials.

3. Bacterial Cellulose (BC):

Bacterial cellulose is secreted by certain bacteria during culture. It has a highly pure nanofiber network structure with a diameter usually between 20-100 nanometers. It has excellent mechanical properties, high purity and good biocompatibility, and is often used in medical dressings, food additives and acoustic films.