| Third Plenary Session of the Party’s eighteenth resolution stated that the construction of ecological civilization, we must establish a system of integrated system of ecological civilization, the source of the strictest protection system, damage compensation system,accountability system, improve environmental management and ecological restoration system,with System to protect the ecological environment. Improve environmental issues addressed in the implementation of institutional innovation perfect, man and nature of scientific development, harmony and progress; extensive development mode transformation,resource-saving, technology-intensive and environmentally friendly development of historic change patterns become Environmental Science thrust direction field. This research aims to biomass(corn stover) from the traditional extensive use of raw mode by the technical innovation, was converted into Xunhua use of high value-added new materials to respond to future synthetic organic materials under the oil crisis and the depletion of fossil resources facing the background material shortage situation. This clean and efficient use of microwave energy to large reserves of renewable biomass material liquefied use, comprehensive,coordinated and sustainable development in line with the current policy line.This paper describes the biomass(corn stover) as raw material, as a reaction in the microwave energy source, in a mixture of phenol and concentrated sulfuric acid as a catalyst under liquefaction conditions on the solid powder to liquefy corn stalk. Corn stalk residue liquefaction reaction is carried out and compared to the experimental conditions for determination, while infrared spectroscopy as a means to study where the old and new functional group absorption peak changes, in order to determine the case of biomass feedstock molecules are mainly transformed microwave liquefaction process students. After obtaining liquefied corn stalks, in an alkaline environment with microwave energy for the reaction with epichlorohydrin, epoxy resin extract preparation. Finally, an epoxy resin extracted through combination with other additives and curing agents, epoxy resin obtained with initial practical cement, and other physical means by tensile shear test cements Utility Index.Biomass(corn stover) is mainly composed of cellulose, hemicellulose, lignin and other organics, inorganics together constitute[1]. Its main constituents have insoluble, hard liquefaction characteristics. In a mixture of phenol and concentrated sulfuric acid under the action of liquefied agent by uniform heating microwave penetration, to the corn stalk powderpreliminary liquefaction. After repeated tests, preliminary findings in a microwave heating temperature of 160℃, microwave heating time of 22 minutes, the reaction raw material liquid to solid ratio of 4:1, when the experiment liquefaction product residue rate fell to its lowest value. Temperature, heating time is too long, are likely to lead to residue rate rebounded appears liquefaction recondensed polymer precipitation.Different than the liquefaction temperature under different conditions, at different times liquefaction conditions, infrared spectroscopy corn stover feedstock and liquefaction residue liquefaction under different conditions of liquid-solid ratio was found liquefaction residue of cellulose, hemicellulose and lignin are appear the degree of degradation disappear.Preliminary confirms carried forward under microwave and liquefaction reaction of phenol acid conditions. The infrared spectrum for the liquefaction is carried out clearly show that liquefied cellulose, hemicellulose, lignin and other macromolecules iconic functional group has ceased to exist, replaced by a large number of phenolic hydroxyl functional groups,indicating that microwave heating Under acidic conditions, the cellulose and other macromolecules with a phenolic hydroxyl group of phenol degradation was reacted.Microwave catalytic conditions resulting liquefied corn stalks, after repeated phenolic hydroxyl group with epichlorohydrin under alkaline conditions, opening the closed-loop response, to extract the epoxy resin. By further follow-up experiment process, the preparation of an epoxy adhesive, and the adhesive physical performance test. Obtained by orthogonal influence biomass liquefaction shear strength of the epoxy adhesive optimal conditions specific ratio of epoxy resin: curing agent(polyamide): filler(calcium carbonate): plasticizer(phthalate esters) 100:200:200:20. Under these conditions, we made the best synthetic shear strength epoxy adhesive bonding wood when has reached 4.86 MPa. |
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