A kind of attapulgite soil-based nano-wood flame retardant

Abstract

The invention discloses an attapulgite-based nano-scale wood fire retardant. A preparation method of the attapulgite-based nano-scale wood fire retardant comprises the following steps of weighing respectively raw materials by weight part, pouring an acid solution into attapulgite, carrying out stirring, supersonic treatment, standing and decantation of upper suspension at a normal temperature, washing solids by deionized water, wherein the solids are obtained by repeated centrifugation, drying attapulgite modified by an acid, grinding into powder, dividing the powder into two parts, preserving the two parts in a sealed environment, mixing water-soluble flame-retardant ingredients and one of the two parts, treating the other one of the two parts by an aluminate coupling agent aqueous solution with stirring at a normal temperature for 8 hours, mixing flame-retardant suspension and the attapulgite aqueous solution obtained by the previous step, and stirring the mixture for 20 minutes to obtain a attapulgite-based nano-scale wood fire retardant solution. Through vacuum pressurization, the attapulgite-based nano-scale wood fire retardant can be injected into solid wood, wood single boards, wooden fibers or wood shavings without changes of other production processes so that flame-retardant artificial boards or solid wood with efficient flame retardance are obtained.

Description

technical field [0001] The invention relates to a wood flame retardant, in particular to an attapulgite earth-based nanometer wood flame retardant. Background technique [0002] Attapulgite is a layered chain-like hydrated magnesium-aluminum silicate mineral. Its microstructure includes three levels: (1) The basic structural unit is a rod-shaped single crystal with a diameter of 0.01 μm and a length of about Up to 0.1-1μm; (2) rod crystal bundles formed by the parallel aggregation of single crystals; (3) various aggregates formed by the mutual aggregation and stacking of crystal bundles, the particle size is usually on the order of 0.01-0.1mm. At present, there is a small amount of research on using attapulgite as a flame retardant raw material for polymers, but the effect is not very good. In the field of wood flame retardant, many organic flame retardants are costly and prone to pollution, while inorganic flame retardants have no obvious flame retardant effect and large p...

AI Technical Summary

Problems solved by technology

At present, there are a few studies using attapulgite as a flame retardant raw material for polymers, but the effect is not very good

In the field of wood flame retardant, many organic flame retardants are costly and prone to pollution, while inorganic flame retardants have no obvious flame retardant effect and large product deformation

Nano-attapulgite rich in flame-retardant elements such as aluminum and magnesium, which can be filled in the mesoscopic structure of wood, has rarely been reported to be used in flame-retardant wood.