Cellulose is the oldest and most abundant natural polymer on the earth, and it is an inexhaustible and the most precious natural renewable resource for human beings. Cellulose chemistry and industry started more than 160 years ago and was the main research object during the birth and development of polymer chemistry...

The cellulose ether and its further derivatives obtained after refining, alkalizing, and etherification with epoxy compounds and halogenated alkanes and their further derivatives are extremely important chemical raw materials and auxiliary agents. With the development of society and economy...

As a natural green energy widely existing in nature, cellulose has the advantages of large output, stable performance and recyclability. Among them, from the molecular structure of cellulose, it is formed by D-glucopyranose rings connected by β-1,4 glycosidic bonds, in which there are C-2, 3, and 6 positions...

The molecular structure of natural cellulose is a linear homopolymer in which 1-5 of D-glucopyranose anhydrides are connected with each other by b-1,4 glycosidic bonds, and it is a semi-rigid polymer. The three alcoholic hydroxyl groups on the glucose residue ring can undergo oxidation, esterification, etherification and other reactions ...

The standard process of automotive paint includes inspection of the lines, flat (arc) surfaces, gaps, grinding and bevelling of sheet metal repair parts, dust removal, cleaning, sticking, coating primer, filling putty, grinding putty, and extra-fine atoms Ash, use P280# sandpaper to thoroughly polish the old paint on the body that needs to be sprayed with intermediate ...