Preparation Of The Bamboo Tar Resin Based Carbon Foam And Its Composite

Bamboo is a renewable resource that grows very fast, it not only can be used in a simply way, but also provides an alternative energy resource and a raw material for chemical industry. Furthermore, bamboo has been paid many expectations at the very moment that the whole world is struggling in searching an alternative energy for fossil fuel and in seeking an effective solution for environmental pollution.Pyrolysis of bamboo in the absence of oxygen, bamboo charcoal and vinegar can be obtained. After several months standing for vinegar, bamboo tar which is a dark-brown and with smoke viscous liquid can be obtained at the bottom. For its high pollution concern, bamboo tar should not be placed directly to the ground, and it is necessary to find an effective way to its reasonable application. After conducted a comprehensive study of bamboo tar by means of GC-MS, it can be seen that bamboo tar carries lots of aromatic compounds, especially the phenol and its derivatives. Accordingly, the bamboo tar can be a suitable candidate for the preparation of Condensed Poly-nuclear Aromatic resin (COPNA).In this work, bamboo tar was successfully polymerized with p-xylylene glycol (PXG) by acid catalyst to obtain bamboo tar-based resin. In order to discover the best synthesis condition for the preparation of bamboo tar resin, we designed an orthogonal experiment to discuss the influence factors as follow:the ratio of bamboo tar to cross-linking agent (B/C ratio), reaction temperature, reaction time and the content of catalyst. As we found, the best synthesis condition is supposed to be:B/C ratio is 0.6, the content of catalyst is 5%, and react under 130℃ for 5h. As the B/C ratio has the largest influence on the properties of bamboo tar resin, we designed one more series of experiment to stress the influence of B/C ratio on the bamboo tar resin. At last,0.6 was considered to be the best B/C ratio for preparation.Furthermore, the application of the bamboo tar resin was studied thoroughly. In this work, bamboo tar resin was employed as precursor of carbonaceous material. The resultant resin was heat-treated in a furnace for foaming, stabilized, and carbonized to carbon foam. Al last, the thermal conductivity and compressive strength as well as micro-structure of carbon foam were characterized. The thermal conductivity in ambient atmosphere is 0.071 W/m*k, the compressive strength is about 7.66 MP, the pore diameters distribution range from 1 to 50μm, and the weight loss of the carbon foam in ambient atmosphere initiated at temperature 525℃ which indicating that carbon foam has an excellent oxidation resistance property. Bamboo tar resin based carbon foam appeared to be fully amorphous. The characterizations indicated that the carbon foam derived from bamboo tar resin can be expected to be an excellent thermal insulation material.Last, a preliminary exploration of the preparation of Bamboo tar resin based carbon foam/RF carbon aerogel composites were implemented. The precursor of RF carbon aerogel were infiltrated into carbon foams, composites can be successfully produced after a series processes of sol-gel reaction, aging, solvent replacement, drying and carbonization. After combined with the aerogel, the thermal conductivity of the carbon foam can be reduced by 7.79%, so as to improve the thermal properties of composite.