Study On A New Porous Carbon Material——Woodceramics

Efficiently utilizing wood, making new materials with the reproducible material, and reducing the consuming of irreproducible to protect our environment, is the aim of the study on Woodceramics(WCS). The row material for WCS is cheap and the cost of manufacturing is acceptable. The new porous carbon material has so many good characteristics that WCS can be used widely in many fields. However, it had hardly been studied in China.In this study, WCS was obtained by carbonizing wood material impregnated with PF resin without oxygen. The yield, properties, effect factors, microstructure of the products and the chemical reaction were analyzed. And the possibility of modification of WCS by a fire retardant treatment was discussed. The PF resin concentration and sintering temperature effected very evidently on its yield, properties and components as a carbon material.The N2 absorption experiment at low temperature shows that, the absorption properties of the charcoal sample was very poor. PF resin bringed a lot of micropores into the products and improved its absorption properties.SEM photographs indicate PF resin was filled in the wall of the wood cell and strengthened it, and more resins were filled in the interspace of wood fibers and fastened them.The microcosmic surface shape of the Populus Ussziriensis wood, the solidified PF resin, and the carbonization products were first observed by AFM. Carbonization made them 10 times rougher.For the first time, the chemical reactions of the samples during sintering were analyzed by TG-DSC-FTIR. The pyrolyzation of MDF treated with PF resin included pyrolyzation of MDF and PF resin. The chemical reactions happened continuously under 800 C, so the yield and properties of the products were changed obviously. Up 800 C, they were stabilized.Originally, the WCS modified by a fire retardant was studied. Their changes in volume and some properties were similar to those of the sample treated with PF resin only. There was fire retardant effect on the pyrolyzation mechanism. It might enhance the yield of the products, but not the strength.