A kind of plant fiber reinforced calcium silicate board and its preparation method

Abstract

The invention discloses a plant fiber reinforced calcium silicate board and a preparation method thereof, which has the advantages of overcoming the problem that it is difficult to take into account both the plant fiber length and the plant fiber specific surface area at the plant fiber refining treatment stage in the calcium silicate board production process , through an effective and green enzyme treatment method, using a mixed enzyme solution to etch the surface of the plant fiber, making it easier to separate the surface of the plant fiber during the beating process, and using high-concentration refining to reduce the plant fiber The cut-off rate during refining can obtain longer plant fibers with a certain specific surface area, which reduces the energy consumption of refining, improves the water filtration characteristics during sheet forming, and improves the flexural strength performance. After the traditional plant fiber and powder are mixed, a new mixing disc grinding process of plant fiber and powder can make the plant fiber more uniformly dispersed in the powder, and at the same time increase the contact between the plant fiber and the powder, thereby improving Bonding properties of plant fiber and powder matrix after molding.

Description

technical field [0001] The invention relates to a calcium silicate board, in particular to a reinforced calcium silicate board and a preparation method thereof. Background technique [0002] Calcium silicate board is made of loose short fibers such as inorganic mineral fibers or cellulose fibers as reinforcement materials, and is a cementing material mainly composed of siliceous-calcium materials. After pulping, molding, and accelerated curing reaction in high-temperature and high-pressure saturated steam, Calcium silicate board made by forming calcium silicate gel. It has the advantages of high strength, stable size, fire resistance and moisture resistance, and long service life. It is widely used in the fields of suspended ceilings and partition walls of industrial and commercial engineering buildings, and home decoration. [0003] In order to increase the strength of the calcium silicate board, the conventional method is to add reinforcing materials. The reinforcing fib...

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Problems solved by technology

[0004] In order to avoid the problem that the strength of the calcium silicate board is reduced due to the cutting of some wood pulp fibers by the refining treatment, the Chinese patent with the patent application number of 2016106091925 and the patent application publication number of CN107473681A discloses a calcium silicate calcium silicate Board and its preparation method, which use graphene and reinforcing fiber as reinforcement materials to improve the strength performance of calcium silicate board; the Chinese invention patent with patent application number 2016106091925 and patent application publication number CN106220114A discloses a high-performance carbon fiber The processing method of reinforced calcium silicate board, which uses high-performance carbon fiber as reinforcing fiber

The disadvantages of the above two methods of reinforcing calcium silicate boards are as follows: both use additional reinforcing materials to improve the strength performance of calcium silicate boards, but materials such as graphene and carbon fiber are relatively expensive new materials. The disadvantage is that it leads to a substantial increase in production costs, increases the financial burden on consumers, and construction waste is also difficult to degrade, which is inconsistent with the current concept of green and environmentally friendly building materials

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