The Study Of The Reinforced Carbon Fiber Laminated Timber Ceramic

In this study, with pine charcoal powder and liquefied wood to be substrate, single timber was prepared by compression molding. The sheet wood ceramic matrix materia was prepared by high-temperature sintering under a nitrogen atmosphere. To prepare reinforced carbon fiber laminated timber ceramic, it overlaid and glued with epoxy matrix material and carbon fiber.The study found that the mass ratio of charcoal/liquefaction wood and the sintering temperature had a great impact on the basic properties of the matrix material. With the increase in the mass ratio charcoal/wood liquefaction, it found that not only carbon yield and the apparent density will increase, but also the volume shrinkage will decrease. However, with the continued increase in the sintering temperature, the carbon yield and apparent density will decrease. Through response surface methodology optimized preparing process of the base material, it found that matrix material will obtain high yield and good flexural strength when density before firing 1.1g/cm3、ratio of raw materials 1:0.8 and the sintering temperature 1100 ℃. The response surface optimization model is: Y=7.89+0.42A+0.85B+0.69C+0.54BC-0.54A2-1.4B2-0.89C2.FTIR and XRD analysis showed that ratio of raw materials has a less effect on the base material. As the sintering temperature increases,O and H and other elements are gradually removed. And the higher the sintering temperature is for favorable for improving the degree of graphitization of the matrix material. SEM observation showed that the substrate can retain the original structure of wood and laminated structure of enhanced laminated woodceramics is clear and the crack in the fracture process will deflect in the interlayer. The mechanical properties of carbon fiber reinforced laminated struc-ture wood ceramics increases with the increase of sintering temperature. But it will increase slowly when the sintering temperature is higher than 1100 ℃ and the molar ratio is more than 1:0.75. With the carbon powder/wood liquefaction ratio increased, the friction will increase. At the same time, compared with the wood ceramics prepared by traditional methods, enhanced wood ceramics increased in mechanics performance significantl. Bending load by ordinary wood ceramics increased from 0.74 MPa to 5.13 MPa, increased by 6.93 times; the compressive load increased by 10 times. Due to the use of the laminated structure and enhance carbon fiber, the fracture toughness is higher than that of normal wood ceramics. It’s improved about 10 times under the condition of this experiment.This study investigated that the liquefied wood which could contribute to protect the environment was used to replaced the traditional thermosetting resin. The mechanical properties of wood ceramics were increased effectively by using the carbon fiber and the laminated structure, especially the fracture toughness is improved significantly.