Woodceramics/Attapulgite Composites Preparation And Properties

China is a large agricultural country, the wide distribution of crop straw yield, variety,is a common resource. Although in recent years China has improved so much on the use ofstraw, but there is still30%of the waste straw, straw reuse of resources is still a long way togo.Woodceramics is a new type of porous carbon materials, which has the very goodapplication properties, it is made of the wood which has impregnated by thermosetting resinfirstly, then vacuum-carbonized in high temperature furnace, which could reduce pollutionof the environment. In this paper, we use straw crushing (canola), mix the attapulgite,phenolic resin, alcohol and curing agent, carried out in accordance with the different ratioof hot pressing molding, then sintering woodceramics/attapulgite composite materialsrespectively at600℃,700℃,800℃,900℃,800℃,1100℃,1200℃.Wheat straw woodceramics/attapulgite composite ceramic material, rape stem basewoodceramics/attapulgite composite ceramic materials were tested from porosity, carbonresidue rate, bending strength, volume density, resistivity and true density of six indicatorsin respectively,and its forming mechanism, performance characteristics are analyzed.Comprehend the effect of the components and the change in temperature to the preparationabout wood ceramics/attapulgite composite material. When the ratio of raw materials towheat: stone=2:1(wheat straw/g: attapulgite/g: phenolic resin/g: alcohol/ml: curingagent/g=100:50:75:75:37.5）, sintering temperature is700~800℃, the physical propertiesof materials are more ideal. Through the experimental analysis found that wheat straw iscarbonization and dehydration in high temperature sintering, cellulose form a newhydrocarbon structure, with the sintering temperature increased, cellulose began tocarbonizing, Generating materials with graphite crystal and amorphous component;phenolic resin is depolymerization in the high temperature sintering, then graduallycarbonizing and generating vitrification of hard carbon; the nature of the attapulgite activein high temperature,the sintering volume change is small, with high sintering temperaturethe crystal structure collapse.In the same proportion and sintering temperature, comparing the rape rod straw basewoodceramic/attapulgite composite materials (canola:attapulgite=2:1, canola:attapulgite=1:1, canola:attapulgite=1:2) and wheat straw woodceramics/attapulgite composite materials (wheat straw:attapulgite=2:1, wheat straw:attapulgite=1:1, wheatstraw:attapulgite=1:2), analysising the difference of the six indicators. with rapestraw:attapulgite=1:2(rape straw/g: attapulgite/g: phenolic resin/g: alcohol/ml: curingagent/g=100:200:150:150:75), the properties of the samples are the most ideal. Analysisfound that there is no effect on the material residual carbon rate, bending strength propertieswith addition of rape stalk or straw; adding wheat straw，the material porosity, bulk densityis slightly bigger than adding rape stalk, true density is slightly less than adding rape stalk;adding rape stalk the conductivity of the stalk is slightly better.Using the X-ray diffraction analysis (XRD), scanning electron microscope (SEM)analysis of its microscopic structure. Wood/attapulgite composite ceramic material isporous amorphous carbon materials. And understand that composite materials still havesimilar after the carbonized wood holes, and with the increase of carbonization temperature,changes in the composition.