CN105058824A - Method for preparing ABS-based wood and plastic composite material through walnut shell flour - Google Patents

Abstract

The invention discloses a method for preparing an ABS-based wood and plastic composite material through walnut shell flour. The walnut shell flour is immersed in a sodium hydroxide aqueous solution for alkalization processing, washing is carried out through distilled water, and alkali and other impurities are removed; drying is carried out for seven hours at the temperature of 95 DEG C, and standby walnut shell flour is prepared; raw materials are weighed according to the mass ratio of 100510-12230-60 of ABS stearic acid maleic anhydride nano calcium carbonate standby walnut shell flour; the raw materials are mixed to prepare a mixed material, plastication is carried out for 5-6 min on an open mill at the temperature of 170 DEG C, and plastication flaky materials are prepared; and a plastication sheet is placed on a flat plate vulcanization machine to be pressed, and then the ABS-based wood and plastic composite material is prepared. The method is easy to operate and easy to apply and popularize on a large scale. By means of adding of various assistants, the processing rheological property, the hardness, the thermal stability and the impact resistance of the materials and other key prosperities in the processing process are improved.

Description

A kind of method utilizing walnut shell powder to prepare ABS base wood-plastic composite material

Technical field

The invention belongs to wood plastic composite preparing technical field, particularly a kind of method utilizing walnut shell powder to prepare ABS base wood-plastic composite material.

Background technology

Containing wood powder and plastics in wood plastic composite, therefore composite has had the advantage of timber and plastics concurrently: 1. good processing characteristics.Wood plastic composite includes plastics and fiber, therefore, has the processing characteristics that same timber is similar, can saw, can follow closely, can dig, and use carpenter's utensil to complete, and nail-holding ability is obviously better than other synthetic materials.Mechanical performance is better than wood materials.Nail-holding ability is generally 3 times of timber, is 5 times of particieboard.2. good strength character.Wood plastic composite includes plastics, thus has good elastic modelling quantity.In addition, due to including fiber and through fully mixing with plastics, thus there is the resistance to compression suitable with hardwood, the physical and mechanical properties such as counter-bending, and its durability is obviously better than normal wood material.Case hardness is high, is generally 2 ~ 5 times of timber.3. there is water-fast, corrosion resistant performance, long service life.Wood-plastic material and products thereof, can anti-strong acid-base, water-fast, corrosion-resistant compared with timber, and not bacterial growth, is not easily damaged by worms, not long fungi.Long service life, can reach more than 50 years.4. excellent adjustable performance.By auxiliary agent, the changes such as plastics can be polymerized, foam, solidify, modification, thus the characteristic such as density, intensity changing Wood-plastic material, can also reach anti-aging, antistatic, the particular/special requirement such as fire-retardant.

Walnut shell powder wide material sources, are a kind of energy-conserving and environment-protective biomass materials, can be used as the wood powder of wood plastic composite.From the angle of raw materials for production, wood plastic composite slows down and eliminates the public hazards pollution of plastic refuse, also eliminates walnut shell waste material and piles up and burn the pollution brought to environment.

Because wood plastic composite has so many performance, just decide it will be widely used.1. building industry.The floor of making by Wood Fiber Composites than superior many in low wood fibre board performance at present, not breathing, waterproof, surface aesthetic.If meet material for multilayer coextrusion section bar, internal layer adopts reclaimed materials, and outer employing virgin material, the every mechanical property of the goods made can compare favourably with hardwood products.2. the application of automobile industry.In recent years, Wood plastic boards, with its rational price, superior performance, is applied and is increased in automobile decoration material, as automobile door-plate, after put thing case, luggage case sidewall, seat plate etc.3. other industry.Except traditional industry, the application of composite constantly expands, started at present apply as pallet, flowerpot, handle for tool, office appliance, attack the engine components such as fast highway route marker, acoustic board and audio amplifier.

ABS price is lower, for the development of wood plastic composite provides price advantage.ABS resin is linear polymer, has thermoplasticity.ABS resin has certain toughness, low creep properties, and excellent dimensional stability and shock resistance, density is about 1.04 ~ 1.06g/cm3.It is antiacid, the corrosive power of alkali, salt is stronger, also can tolerate organic solvent dissolution to a certain extent.Developmental research ABS base wood-plastic composite material, improves its processing fluidity, can widen the processed and applied field of wood plastic composite, significant to the high performance research of wood plastic composite.

Summary of the invention

The object of this invention is to provide a kind of method utilizing walnut shell powder to prepare ABS base wood-plastic composite material.

Concrete steps are:

(1) walnut shell powder is crossed 50 mesh sieves, then be basification 5 ~ 6 hours in the sodium hydrate aqueous solution of 10 ~ 20% at mass percent concentration, alkalization temperature is 50 ~ 60 DEG C, and then wash 4 ~ 5 times with distilled water, alkali on removing walnut shell powder and other impurity, finally at 95 DEG C, drying processes 7 hours, obtained walnut shell powder for subsequent use.

(2) raw material is taken according to following mass ratio, ABS: stearic acid: maleic anhydride: nano-calcium carbonate: walnut shell powder=100:5:10 ~ 12:2:30 ~ 60 for subsequent use that step (1) is obtained, raw material is mixed, stir with the speed of 5000 ~ 6000 revs/min, obtained mixed material.

(3) the front roll temperature arranging mill is 170 DEG C, rear roll temperature is also 170 DEG C, after the temperature of mill rises to the temperature of setting, constant temperature 30 minutes, then opens mill, and the mixed material that step (2) is obtained is poured between two rollers of mill, plasticate 5 ~ 6 minutes, mix rear slice, place cooling, obtained sheet material of plasticating.

(4) vulcanizing press is heated, the temperature arranging cope match-plate pattern is 180 DEG C, the temperature of lower bolster is 180 DEG C, treat that temperature rises to the temperature of setting, constant temperature 15 minutes, mould to be placed between two templates preheating 30 minutes, then mould is opened, the sheet material of plasticating that step (3) is obtained is put into the die cavity of mould, to cover in template that mould puts it to vulcanizing press preheating again 15 minutes, mold pressing 6 minutes under 13Mpa, then cool on vulcanizer, treat that temperature drops to room temperature, pressure release, take out mould, and open, the plate be pressed into is taken out, i.e. obtained ABS base wood-plastic composite material.

The inventive method is simple to operate, is easy to large-scale promotion application, and adding by various auxiliary agent, improves hardness, the key performance such as heat endurance and impact resistance of rheological performance in process and material.

Detailed description of the invention

embodiment:

(1) walnut shell powder is crossed 50 mesh sieves, then be basification 5 hours in the sodium hydrate aqueous solution of 15% at mass percent concentration, alkalization temperature is 55 DEG C, and then wash 5 times with distilled water, alkali on removing walnut shell powder and other impurity, finally at 95 DEG C, drying processes 7 hours, obtained walnut shell powder for subsequent use.

(2) raw material is taken according to following mass ratio, ABS: stearic acid: maleic anhydride: nano-calcium carbonate: walnut shell powder=100:5:11:2:50 that step (1) is obtained, raw material is mixed, stirs with the speed of 5500 revs/min, obtained mixed material.

(3) the front roll temperature arranging mill is 170 DEG C, rear roll temperature is also 170 DEG C, after the temperature of mill rises to the temperature of setting, constant temperature 30 minutes, then opens mill, and the mixed material that step (2) is obtained is poured between two rollers of mill, plasticate 5 minutes, mix rear slice, place cooling, obtained sheet material of plasticating.

(4) vulcanizing press is heated, the temperature arranging cope match-plate pattern is 180 DEG C, the temperature of lower bolster is 180 DEG C, treat that temperature rises to the temperature of setting, constant temperature 15 minutes, mould to be placed between two templates preheating 30 minutes, then mould is opened, the sheet material of plasticating that step (3) is obtained is put into the die cavity of mould, to cover in template that mould puts it to vulcanizing press preheating again 15 minutes, mold pressing 6 minutes under 13Mpa, then cool on vulcanizer, treat that temperature drops to room temperature, pressure release, take out mould, and open, the plate be pressed into is taken out, i.e. obtained ABS base wood-plastic composite material.

The Rockwell hardness of the ABS base wood-plastic composite material that the present embodiment obtains is 83.68, and impact strength is 6.856KJ/m ², hot strength is 65.774MPa, all comparatively excellent.

Claims (1)

1. utilize walnut shell powder to prepare a method for ABS base wood-plastic composite material, it is characterized in that concrete steps are:

(1) walnut shell powder is crossed 50 mesh sieves, then be basification 5 ~ 6 hours in the sodium hydrate aqueous solution of 10 ~ 20% at mass percent concentration, alkalization temperature is 50 ~ 60 DEG C, and then wash 4 ~ 5 times with distilled water, alkali on removing walnut shell powder and other impurity, finally at 95 DEG C, drying processes 7 hours, obtained walnut shell powder for subsequent use;

(2) raw material is taken according to following mass ratio, ABS: stearic acid: maleic anhydride: nano-calcium carbonate: walnut shell powder=100:5:10 ~ 12:2:30 ~ 60 for subsequent use that step (1) is obtained, raw material is mixed, stir with the speed of 5000 ~ 6000 revs/min, obtained mixed material;

(3) the front roll temperature arranging mill is 170 DEG C, rear roll temperature is also 170 DEG C, after the temperature of mill rises to the temperature of setting, constant temperature 30 minutes, then opens mill, and the mixed material that step (2) is obtained is poured between two rollers of mill, plasticate 5 ~ 6 minutes, mix rear slice, place cooling, obtained sheet material of plasticating;

(4) vulcanizing press is heated, the temperature arranging cope match-plate pattern is 180 DEG C, the temperature of lower bolster is 180 DEG C, treat that temperature rises to the temperature of setting, constant temperature 15 minutes, mould to be placed between two templates preheating 30 minutes, then mould is opened, the sheet material of plasticating that step (3) is obtained is put into the die cavity of mould, to cover in template that mould puts it to vulcanizing press preheating again 15 minutes, mold pressing 6 minutes under 13Mpa, then cool on vulcanizer, treat that temperature drops to room temperature, pressure release, take out mould, and open, the plate be pressed into is taken out, i.e. obtained ABS base wood-plastic composite material.