Straw board for floor and manufacturing method and application of straw board

Abstract

The invention discloses a straw board for a floor and a manufacturing method and application of the straw board. The manufacturing method comprises the following steps that rice straws are cleaned upwith water, dried and crushed to obtain a straw crushed material; the straw crushed material is taken to be stir and wash in water, extruding, dehydrating and drying are conducted on the washed straws, the straw crushed material is added into sodium hydroxide solution, ultrasonic soaking at room temperature is conducted, the straw crushed material is neutral after water washing, soaking at room temperature with sulfuric acid solution is conducted after drying, and the straw crushed material is neutral after water washing; the straw crushed material is soaked into sodium silicate solution to obtain straw fibers after drying finally, a hydrophobic material and a modifier are added into the straw fibers, the obtained straw fibers are sent into a stirring-type glue sprayer, a spray gun is arranged in the stirring-type glue sprayer for glue spraying, and the straw fibers are uniformly mixed with an adhesive by stirring; and the straw fibers mixed with the adhesive are transferred into a mould press, and pre pressing and hot pressing in the mould press after paving are conducted to obtain the straw board. By means of the method, the mechanical properties of the board are improved while the application amount of the adhesive is reduced, meanwhile, the product has hydrophobicity and fireproof performance, and secondary processing molding is facilitated.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a building board for floor slabs, in particular to a straw board and its manufacturing method and application. Background technique [0002] As a by-product of agricultural production, crop straw has not been well processed and utilized for a long time, causing farmers to treat it as waste by burning and discarding it, resulting in serious environmental pollution and great waste of fiber resources. Straw has relatively high cellulose and lignin content. If it can be fully used, it can solve severe environmental problems such as smog caused by burning straw, sharp reduction of forest resources, and excessive carbon emissions. However, due to the constraints of various factors, the development of straw building materials has encountered a bottleneck and has not performed well in the market. At present, most of the research directions for straw panels focus...

AI Technical Summary

Problems solved by technology

However, there are few studies in this area, and the performance of the product becomes worse after the amount of adhesive is reduced

Although some attempts have been made in the prior art to use crop stalks to produce boards, the products produced have some defects in strength, flame retardancy, acid and alkali resistance, water resistance and environmental protection. The main reasons are as follows Point: First of all, the adhesives currently used in wood-based panel processing are mainly urea-formaldehyde resin adhesives (UF) and phenolic resin adhesives (PF). Such adhesives are difficult to obtain satisfactory bonding strength, and in the production process of functional panels, Especially in the preparation process of hydrophobic sheets, simple mixing of hydrophobic materials tends to reduce the strength of the sheet structure, cracking and loosening

Secondly, the traditional hot pressing process can be roughly divided into three stages, namely the slab compression stage, the gel reaction solidification stage, and the low-pressure exhaust stage. The hot pressing process is usually also a key control node for sheet metal manufacturing: one is exhaust The time is long, which is about one-third of the entire production process time, resulting in relatively low production efficiency; second, the slab is prone to bubbling during the exhaust process, resulting in a decline in the product qualification rate and an increase in cost

Third, in order to improve the strength of the board, the existing technology usually adds cement to the core of the board, and lays cotton felt and other materials on the surface, but the weight of the board will increase, and the internal structure is prone to stress failure when it is laid on a large area. Even and damaged

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