Synthesis Of Bamboo Tar Based High Temperature Resistant Resin And Its Application On Preparation Of Porous Carbon

Bamboo tar, a by-product during bamboo pyrolysis process, was used as a basic raw material in this study to synthesize condensed polynuclear aromatic (COPNA) resin. The resin was used as precursor to prepare porous carbon materials then.Constituents of bamboo tar were studied by methods of componential analysis such as Gas Chromatography-Mass Spectrometer (GC-MS), Fourier transform infrared spectroscopy (FT-IR), at first. The bamboo tar was polymerized with p-Xylylene glycol (PXG) under catalysis of p-toluenesulfonic acid. And then a kind of bamboo tar based COPNA resin was got. Systematical analysis was carried out about the resin.The results show that bamboo tar can be used as a raw material to synthesize COPNA resin. Through orthogonal test, the optimization of reaction conditions was investigated. The optimal condition was obtained. The results showed the importance of technological parameters in order was:the weight ratio of monomer and cross-link agent, mass content of catalyst, reacting temperature and reacting time. FT-IR was carried out to study the reaction mechanism. The results show that during the process polymerization of aromatic ring, phenols polycondensation, and the removal of small molecules were primary reaction. In addition, thermogravimetric test and molecular weight distribution test of B stage resin were measured. After curing, the heat-resistant quality of C stage resin was tested. The curing mechanism was speculated by FT-IR test.The B stage resin used subsequently was got under conditions below: the weight ratio of bamboo tar and PXG is5:2; the mass content of catalyst accounts for7%, reaction time and reaction temperature is4h and130℃respectively. The content of β resin which serve as binder in the B stage resin reached36%. After curing, initial pyrolysis temperature of the C stage resin is360℃. The carbon yield after1000℃reached up to50%, which exhibited high thermal resistance and high carbon yield.The above mentioned B stage resin is cured under different conditions to prepare porous carbon material. Morphology of those carbon materials was characterized. Microporous glass carbon preparation and carbon foam preparation is explored respectively. Glass-like carbon materials prepared under different condition was used as anode materials on lithium. The specific capacity stabilized at296mAh/g after50cycles. Bamboo tar resin based carbon foam was prepared under atmospheric pressure. The foam exhibited pressure strength of13.4MPa with a density of0.387g/cm-3. All these above show good prospects on bamboo tar resin using as precursor of porous carbon materials.