CN105130332A - Antibacterial plant fiber cement composite ribbon board and manufacturing method thereof - Google Patents

Abstract

The invention discloses an antibacterial plant fiber cement composite ribbon board. According to the invention, an epoxy resin emulsion dipping treatment process is employed to pretreat the surfaces of plant fiber so as to allow the internal and external surfaces of the plant fiber to be coated with a polymer film, then mist-like tallol is sprinkled, so the entire fiber is compact, obtains certain rigidity and has improved water resistance; and then fly ash is added to modify and replace a part of cement, so the generation amount of hydrated calcium hydrate is decreased, and corrosion resistance of the plant fiber is improved. Thus, the prepared plant fiber cement composite ribbon board has the characteristics of light weight, low cost, antibacterial property, excellent heat-preservation and sound-insulation properties, etc., and meets construction requirements places like of houses and offices.

Description

A kind of antibacterial plant fibrocement composite strip plate and preparation method thereof

Technical field

The present invention relates to material of construction material technical field, be specifically related to a kind of antibacterial plant fibrocement composite strip plate and preparation method thereof.

Background technology

Since entering the nineties, in the selection of living environment, people have been not content with general has it to occupy, but is pursuing material of construction and the new building materials of environmental harmony type with natural characteristic.Environmental harmony type building materials must meet heat preservation energy-saving, sound absorption sound insulation, water-proof fire-retardant, nonpoisonous and tasteless, lightweight, the characteristic such as high-strength, safe, plant fiber-cement composite strip plate is exactly a kind of novel environmental harmony type material of construction, selected vegetable fibre refers to annual fiber, mainly refers to that agricultural crop straw is as cornstalk, straw, Cotton Stalk, hemp stalk etc.

At China's yearly plant abundance, be inexhaustible, nexhaustible raw material, their lifetime is shorter, does not have too large purposes after withered.These agricultural crop straws through cut off hammer broken after obtained vegetable fibre feature be that length-to-diameter ratio is large, specific tenacity is high, specific surface area is large, density is low and biodegradable, have that cost is low, tensile strength advantages of higher in addition, replace timber to make cementitious composite batten strongthener, in use unharmful substance and obnoxious flavour generate.

But the alkaline attack effect of vegetable fibre extract to the anticoagulation of cement and cement-hydrate all limits the application of plant fiber-cement composite strip plate, show: the high alkalinity liquid phase in cement matrix hole has erosion action to vegetable fibre, thus affects the weather resistance of composite strip plate; Vegetable fibre has very high water-intake rate, the declining to a great extent of flexural tensile strength and Young's modulus after volume change can be caused to cause plant fiber-cement composite strip plate to make moist, and composite strip plate is distorted distortion, even ftractures; Vegetable fibre because there is depolymerization, making its polymerization degree decline and causing the corresponding reduction of its tensile strength under microbial process.For solving the problems of the prior art, need to carry out modification to existing plant fibre surface and reduce the alkalescence of gelling material.

Summary of the invention

Object of the present invention is just to provide a kind of antibacterial plant fibrocement composite strip plate and preparation method thereof, to overcome the deficiencies in the prior art.

The object of the present invention is achieved like this:

A kind of antibacterial plant fibrocement composite strip plate, it is characterized in that, be made up of the raw material of following weight part: vegetable fibre 24-28, steel fiber 7-9, silicate cement 30-35, flyash 45-55, hollow glass micropearl 10-14, sodium sulfate 0.2-0.5, Calucium Silicate powder 0.8-1.4, redispersible latex powder 1-3, hexachlorocyclotriphosphazene 0.04-0.07, nanometer silver-zirconium phosphate antimicrobial 0.1-0.3, ethylene glycol 6-12, Yatall MA 3-5, epoxy resin latex 14-16, water are appropriate.

The preparation method of described a kind of antibacterial plant fibrocement composite strip plate, is characterized in that comprising the following steps:

(1) within baking oven about 3-4 hour that vegetable fibre is put into 105 DEG C, dry, room temperature is dried, rap that to remove to pectin and be crushed to diameter be 3-6mm again with skin hammer, being placed on mass concentration is soak 24 hours in the epoxy resin latex of 10%, press dry post-drying, air blast to the state of seething sprays into vaporific Yatall MA, dries;

(2) hollow glass micropearl is calcined 1-2 hour at 470-580 DEG C, cooling adds flyash agitation grinding 30-40 minute, add Calucium Silicate powder and be warming up to 185-240 DEG C of stirring 5-10 minute, be cooled to 50-80 DEG C, add hexachlorocyclotriphosphazene, 10-15 minute is stirred in ethylene glycol continuation, be cooled to room temperature, dry porphyrize;

(3) sodium sulfate be dissolved in water and stir 10-15 minute, add step (1), (2) reaction mass stirring and evenly mixing, add silicate cement and other remaining components again and stir 20-30 minute, it is shaping to add forming machine, obtains finished product successively after 20-30h through cutting, the demoulding, natural curing.

The present invention has following beneficial effect: it is easy that the present invention prepares simple operations, first epoxy resin latex dip treating technique is taked to make the surfaces externally and internally of vegetable fibre be enclosed with one layer of polymeric film to plant fibre surface pre-treatment, spray vaporific Yatall MA again, make whole fibre dense and obtain certain rigidity, and water tolerance improves; Secondly flyash is added and in addition modification replaces part of cement, the growing amount of calcium hydroxide after minimizing aquation, improve the corrosion resistance of vegetable fibre, choose the water cement ratio of 0.42 simultaneously, obtained plant fiber-cement composite strip plate has that light weight, cost are low, antibacterial, the excellent feature of heat preservation and soundproof, is applicable to the building requirements in the place such as household, office.

Embodiment

Described a kind of antibacterial plant fibrocement composite strip plate, it is characterized in that, be made up of the raw material of following weight part: vegetable fibre 25, steel fiber 7, silicate cement 32, flyash 48, hollow glass micropearl 13, sodium sulfate 0.3, Calucium Silicate powder 0.9, redispersible latex powder 1, hexachlorocyclotriphosphazene 0.06, nanometer silver-zirconium phosphate antimicrobial 0.2, ethylene glycol 7, Yatall MA 4, epoxy resin latex 15, water are appropriate.

Making method comprises the following steps:

(1) within baking oven about 3-4 hour that vegetable fibre is put into 105 DEG C, dry, room temperature is dried, rap that to remove to pectin and be crushed to diameter be 3-6mm again with skin hammer, being placed on mass concentration is soak 24 hours in the epoxy resin latex of 10%, press dry post-drying, air blast to the state of seething sprays into vaporific Yatall MA, dries;

(2) hollow glass micropearl is calcined 1-2 hour at 470-580 DEG C, cooling adds flyash agitation grinding 30-40 minute, add Calucium Silicate powder and be warming up to 185-240 DEG C of stirring 5-10 minute, be cooled to 50-80 DEG C, add hexachlorocyclotriphosphazene, 10-15 minute is stirred in ethylene glycol continuation, be cooled to room temperature, dry porphyrize;

(3) sodium sulfate be dissolved in water and stir 10-15 minute, add step (1), (2) reaction mass stirring and evenly mixing, add silicate cement and other remaining components again and stir 20-30 minute, it is shaping to add forming machine, obtains finished product successively after 20-30h through cutting, the demoulding, natural curing.

The technical parameter index of the plant fiber-cement composite strip plate using the present invention to produce is as follows:

(1) fracture toughness value improves 58.59%;

(2) relative impact intensity improves 27.84%;

(3) thermal conductivity (medial temperature 25 ± 2 DEG C): 0.066W/ (mk);

(4) sound absorption coefficient maximum is 0.598, and sound-damping qualities is 25dB.

Claims (2)

1. an antibacterial plant fibrocement composite strip plate, it is characterized in that, be made up of the raw material of following weight part: vegetable fibre 24-28, steel fiber 7-9, silicate cement 30-35, flyash 45-55, hollow glass micropearl 10-14, sodium sulfate 0.2-0.5, Calucium Silicate powder 0.8-1.4, redispersible latex powder 1-3, hexachlorocyclotriphosphazene 0.04-0.07, nanometer silver-zirconium phosphate antimicrobial 0.1-0.3, ethylene glycol 6-12, Yatall MA 3-5, epoxy resin latex 14-16, water are appropriate.

2. the making method of a kind of antibacterial plant fibrocement composite strip plate according to claim 1, is characterized in that comprising the following steps:

(1) within baking oven about 3-4 hour that vegetable fibre is put into 105 DEG C, dry, room temperature is dried, rap that to remove to pectin and be crushed to diameter be 3-6mm again with skin hammer, being placed on mass concentration is soak 24 hours in the epoxy resin latex of 10%, press dry post-drying, air blast to the state of seething sprays into vaporific Yatall MA, dries;

(2) hollow glass micropearl is calcined 1-2 hour at 470-580 DEG C, cooling adds flyash agitation grinding 30-40 minute, add Calucium Silicate powder and be warming up to 185-240 DEG C of stirring 5-10 minute, be cooled to 50-80 DEG C, add hexachlorocyclotriphosphazene, 10-15 minute is stirred in ethylene glycol continuation, be cooled to room temperature, dry porphyrize;

(3) sodium sulfate be dissolved in water and stir 10-15 minute, add step (1), (2) reaction mass stirring and evenly mixing, add silicate cement and other remaining components again and stir 20-30 minute, it is shaping to add forming machine, obtains finished product successively after 20-30h through cutting, the demoulding, natural curing.