Alkali lignin paper enhancer plays a role in resource recovery

With the increase in the proportion of recovered paper and the increase in the amount of filler in the papermaking process, the strength of the paper is getting worse, especially the shortage of wood resources in our country, and the strength of straw fiber is congenitally deficient, making the strength of paper products generally low Adding paper enhancers for this purpose is an effective way to increase paper strength, and it is important to develop high quality, inexpensive paper enhancers.

The content of lignin in the plant kingdom is second only to cellulose, which is a rich natural organic matter, accounting for 20% to 30% of the total organic matter in the plant. Lignin is a three-dimensional network-like macromolecule composed of phenylpropane structural units linked by carbon-carbon bonds (C-C) and ether bonds (1-10). It is a complex aromatic polymer due to its aromatic nature. Properties, side chain aliphatic properties, and various functional bases, such as petroleum-like energy substances and important chemical raw materials. Alkali lignin is a by-product of the pulp and paper industry. The main component is the phenylpropane structural unit and its polymer J. Extraction of lignin, modification of lignin hydroxymethylation, addition of a paper enhancer prepared by graft-copolymerization of a modified product with vinyl monomers to the pulp, can significantly increase the strength of the paper, thereby effectively utilizing the alkali lignin. A renewable resource reduces environmental pollution and solves the waste of resources.