Classification of nanocellulose

Nanocellulose is a nanoscale material made of cellulose with various excellent properties and wide application prospects.Depending on the morphology and preparation method, nanocellulose can be divided into the following categories:

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

Cellulose nanofibers mainly break down cellulose fibers into nanoscale 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 several micrometers to tens of micrometers.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 nanoscale cellulose fragments with high crystallinity obtained by removing the amorphous region of cellulose through acid hydrolysis.The size is usually tens of nanometers to hundreds of nanometers, the diameter is between 5-70 nanometers, and the length is between 100 nanometers and several micrometers.It has high strength, high modulus and biocompatibility, and is often used to strengthen composite materials and serve 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, acoustic films and other fields.