CN104526807A - Wood modification pulp with flame-retardant effect and preparation method thereof - Google Patents

Abstract

The invention discloses wood modification pulp with a flame-retardant effect. The pulp is prepared from the following raw materials in parts by weight: 80-90% of silica sol and 10-20% of ammonium aluminum carbonate hydroxide. According to the invention, the silica sol and the ammonium aluminum carbonate hydroxide are compounded for use for the first time so as to obtain special flame-retardant pulp for wood modification, and the pulp is low in viscosity and good in dispersion stability, and has good fillibility to wood. After the pulp is filled in internal pores of wood, a highly efficient flame-retardant modified wood is formed, so that in the event of a fire, the two kinds of flame retardants collaboratively work, thereby effectively restraining the further occurrence of disasters. The flame-retardant pulp is an inorganic substance, and insoluble in water, therefore, the pulp is green, environment-friendly, and good in leaching resistance.

Description

A kind of Wooden modifying slurries with fire retardation and preparation method thereof

Technical field

The present invention relates to a kind of Wooden modifying slurries with fire retardation, these slurries by Ludox and the composite use of aluminium carbonate ammonium, thus play economic benefits and social benefits fire retardation.

Background technology

Wood materials is as one of traditional building material, be widely used in building trade, timber has natural texture and aesthetic feeling, and self is nontoxic, harmless, usually processed and be treated as the home decoration such as wood furniture, timber floor component, simultaneously timber light weight and have very high specific strength, also as building timber structure, the raw material of wooden bridge, template, electric pole, sleeper, door and window is used widely.Compared to other construction material, the inflammable and intensity of a fire of timber easily spreads, and therefore, the flame treatment of timber and woodwork is imperative.

Although the flame treatment of wood materials can not become not fuel wood, in initial period and the developing stage of fire, fire proofing but can play a role, first, fire proofing is more difficult ignite or ignitor firing time longer, chance of catching fire is relatively little; Secondly, material is through flame treatment, compare untreated material, after catching fire, the speed of release heat and propagation rate decline, can reduce by the quantity of material that ignites and the total amount of heat that produces, increased from the possibility put out by the material from environmental impact of igniting, this also can suppress the generation of flash burn, a lot of fire retardant can also reduce timber in combustion to the generation of the maximum two kinds of material cigarettes of human injury and CO, this fire is occurred after people's escape be favourable factor.

Ludox has larger specific area, and micelle is even, and is in nanoscale, and viscosity is low, good dispersion, fully can immerse and be filled to solids, particularly in porous material.By aluminium carbonate ammonium nanofiber dispersion in Ludox, microcosmic is formed a kind of compound coating structure, macroscopically form a kind of stable dispersion slurries, this slurries are injected wood internal hole by certain impregnating by pressure technique, after drying, wood internal is there is in Ludox with solid gel form, after being heated, Ludox carries out fire-retardant by the mode that dehydration, raising Specific Heat of Wood, reduction timber and air contact surfaces are long-pending to timber, in addition, Ludox, as fire retardant, is filled in timber, can also reduce the discharge capacity of CO and cigarette in combustion of wood process.Timber is when temperature reaches more than 300 DEG C, there is violent decomposition reaction, separate out a large amount of imflammable gas, and take fire, and aluminium carbonate ammonium decomposes and discharges the non-flammable gases such as carbon dioxide, ammonia, steam within the scope of 150 DEG C-300 DEG C, and absorb a large amount of heat, effectively can stop the burning of timber, play fire retardation.

Summary of the invention

Technical problem to be solved by this invention is the defect overcoming prior art, prepare a kind of Wooden modifying slurries with fire retardation, first by Ludox and the composite use of aluminium carbonate ammonium, prepare Wooden modifying special-purpose anti-flaming slurry, this slurry viscosity is low, dispersion stabilization good, has good fillibility to timber.Be filled in wood internal hole by this slurries, form a kind of highly effective flame-retardant improved wood, when breaking out of fire, these two kinds of fire retardants are collaborative to play a role, and effectively suppresses the further generation of disaster.These fire-retardant slurries are all inorganic substances, and water insoluble, and therefore, environmental protection, resistance leachability is good.

Detailed description of the invention

This invention relates to modification slurries and is prepared from by Ludox, aluminium carbonate ammonium.According to mass fraction: Ludox 80-90%, aluminium carbonate ammonium 10-20%; Wherein, described Ludox solid content is 5%-40%, and aluminium carbonate ammonium particle diameter is less than 1 μm >=90%.

Concrete preparation process is:

(1) 10-20% aluminium carbonate ammonium slowly being added temperature is in the 80-90% Ludox of 30-60 DEG C, stirs, obtain mixed liquor with the rotating speed of 200-300r/min;

(2) above-mentioned mixed liquor is proceeded in Efficient air flow vibromill disperse 30-60min, obtain the described timber with fire retardation and change slurries.

Embodiment 1

According to mass fraction: Ludox 80%, aluminium carbonate ammonium 20%; Wherein, described Ludox solid content is 40%, and aluminium carbonate ammonium particle diameter is less than 1 μm >=90%.

(1) 20g aluminium carbonate ammonium slowly being added temperature is in the 80g Ludox of 30 DEG C, stirs, obtain mixed liquor with the rotating speed of 200r/min;

(2) above-mentioned mixed liquor is proceeded in Efficient air flow vibromill disperse 30min, obtain the described timber with fire retardation and change slurries.

Embodiment 2

According to mass fraction: Ludox 90%, aluminium carbonate ammonium 10%; Wherein, described Ludox solid content is 5%, and aluminium carbonate ammonium particle diameter is less than 1 μm >=90%.

(1) 10g aluminium carbonate ammonium slowly being added temperature is in the 90g Ludox of 60 DEG C, stirs, obtain mixed liquor with the rotating speed of 300r/min;

(2) above-mentioned mixed liquor is proceeded in Efficient air flow vibromill disperse 60min, obtain the described timber with fire retardation and change slurries.

Claims (4)

1. there are Wooden modifying slurries for fire retardation, be prepared from by Ludox, aluminium carbonate ammonium.

2. a kind of Wooden modifying slurries with fire retardation according to claim 1, it is characterized in that, described slurries are made up of the raw material of following weight parts: Ludox 80-90%, aluminium carbonate ammonium 10-20%.

3. a kind of Wooden modifying slurries with fire retardation according to claim 1 and 2, it is characterized in that, described Ludox solid content is 5%-40%, and described aluminium carbonate ammonium particle diameter is less than 1 μm >=90%.

4. an a kind of preparation method with the Wooden modifying slurries of fire retardation as claimed in claim 1 or 2, it is characterized in that, the step of described method is:

(1) 10-20% aluminium carbonate ammonium slowly being added temperature is in the 80-90% Ludox of 30-60 DEG C, stirs, obtain mixed liquor with the rotating speed of 200-300r/min;

(2) above-mentioned mixed liquor is proceeded in Efficient air flow vibromill disperse 30-60min, obtain the described timber with fire retardation and change slurries.