Fiber oxidase composition for changing and improving fiber property, and papermaking method and application

Abstract

The invention discloses a fiber oxidase composition for changing and improving fiber property, and a papermaking method and an application. The composition mainly comprises the following components: a bio-enzyme component with an oxidation function on fibers, and an auxiliary component for increasing catalytic activity on the fiber oxidase, wherein the bio-enzyme component is fiber oxidase for changing the surface property of the fiber by redox reaction; the auxiliary component is protein with catalytic action on the fiber oxidase; and the weight ratio of the bio-enzyme component to the auxiliary component is 1 to (0.4-50). When the composition is used for processing paper pulp, the strength of the prepared paper is significantly enhanced, and the drainage performance of the paper pulp is greatly improved.

Description

technical field [0001] The invention relates to the technical field of biological enzymes and the use of biological enzymes to improve the physical and chemical properties of fibers, in particular to a composition for changing and improving fiber surface properties with fiber oxidase, a papermaking method and its application. Background technique [0002] China's paper industry has maintained a high growth rate for 10 consecutive years from 2000 to 2010. By 2011, my country's paper and cardboard production and consumption both exceeded 100 million tons, ranking first in the world. The main raw material of paper or cardboard is fiber. Because pulping and papermaking require a large amount of raw materials and have a certain impact on the environment, the paper industry in all countries in the world is currently producing compressed pulp to ensure forest resources. In addition, domestic raw material forests The construction of the base is slow, the supply of materials is limit...

AI Technical Summary

Problems solved by technology

[0005] (1) Increase the quantity of the product and increase the paper density; the disadvantage of this method is to increase the production cost and waste resources;

[0006] (2) Increase pulping, increase fiber surface separation, and increase paper strength; the disadvantage of this method is high energy consumption, reduced freeness of pulping, reduced fiber yield and increased drying energy consumption;

[0007] (3) Use chemicals such as dry strength agents / wet strength agents, such as cationic starch, anionic starch, sodium carboxymethyl cellulose, polyacrylamide, anionic polyacrylamide, and low molecular weight cationic polymers, to increase pulp The dehydration performance or strength of the method, the disadvantage of this method is high cost, passivation fiber, unfavorable to papermaking water system circulation, increase COD emission; and

[0008] (4) Increase the proportion of wood fiber pulp. The disadvantage of this method is that the cost is high and the dependence on imported raw materials is increased.

However, it has been found in practical applications that due to the reversibility of fibronectin (CBP) adsorption, especially when the polymerase TM When the product is added before refining, the pulp will produce a large number of new surfaces after refining. These new fiber surfaces will be exposed to the "attack" of cellulase. If the residence time is long, the fibers will be excessively sheared, resulting in paper loss. The strength of the product decreases

Images