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A technology of bamboo and liquefaction agent, which is applied in the field of bamboo, can solve problems such as the limitation of bamboo waste processing and utilization, and achieve the effect of wide application and high liquefaction rate
Inactive Publication Date: 2012-10-17
RES INST OF SUBTROPICAL FORESTRY CHINESE ACAD OF FORESTRY
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Therefore, the processing and utilization of b
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Embodiment 1
[0017] The bamboo processing residues are dried, crushed, and passed through a 20-mesh sieve for later use. Add 95 parts by mass of phenol into a reaction vessel with a condenser, a stirrer and a thermometer, and then add 5 parts by mass of polyethylene glycol 400 and glycerol mixture (80 / 20), 2 parts by mass of ethylene carbonate, 3 parts by mass 1 part of sulfuric acid, 25 parts by mass of bamboo powder, fully stirred, liquefied in an oil bath at 140°C for 120min, taken out and cooled to room temperature, washed with absolute ethanol, filtered, and the liquefaction rate of bamboo powder was 98.6%.
Embodiment 2
[0019] The bamboo processing residues are dried, crushed, and passed through a 20-mesh sieve for later use. Add 5 parts by mass of phenol into a reaction vessel with a condenser, a stirrer and a thermometer, then add 95 parts by mass of polyethylene glycol 400 and glycerol mixture (80 / 20), 2 parts by mass of ethylene carbonate, 3 parts by mass One part of sulfuric acid and 25 parts by mass of bamboo powder, fully stirred, liquefied in an oil bath at 170°C for 90min, then taken out and cooled to room temperature, washed with 1,4-dioxane, filtered, and the liquefaction rate of bamboo powder was 92.3%.
Embodiment 3
[0021] The bamboo processing residues are dried, crushed, and passed through a 20-mesh sieve for later use. Add 90 parts by mass of phenol into a reaction vessel with a condenser, a stirrer and a thermometer, and then add 10 parts by mass of polyethylene glycol 400 and glycerol mixture (70 / 30), 3 parts by mass of ethylene carbonate, 4 parts by mass part sulfuric acid, 33 parts by mass of bamboo powder, fully stirred, and after liquefied in an oil bath at 160°C for 90min, took out and cooled to room temperature, washed with anhydrous methanol, filtered, and the liquefaction rate of bamboo powder was 92.3%.
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Abstract
The invention relates to a method for liquefying bamboo wood, which comprises the following steps: a mixed liquefying agent, polymerization inhibitor and acidic catalyst are mixed uniformly, heated to 100 DEG C by heating a reactor, added with bamboo powders, and heated while being stirred to 120-170 DEG C to perform liquefying reaction of bamboo wood. The mixed liquefying agent comprises phenol and a mixture of polyethylene glycol and glycerol. In the liquefying system, the mass ratio of phenol to the mixture of polyethylene glycol and glycerol to the polymerization inhibitor to the acidic catalyst to the bamboo powders is 5-95:95-5:1-4:1-6:20-50. The method for liquefying the bamboo wood has the beneficial effects that the method can be used for liquefying the bamboo wood; the liquefying ratio of the bamboo wood is relatively high; the liquefied product can be widely used, for example for substituting phenol to prepare biobased phenolic resin, for substituting partial polyether or polyester polyol to prepare polyurethane foam, and for preparing a plurality of novel polymer materials such as fiber and carbon fiber, so that the utilization ratio of the bamboo wood is up to 100%.
Description
technical field [0001] The invention relates to the field of bamboo, and mainly relates to a bamboo liquefaction method. Background technique [0002] Due to the special structure of bamboo, the processing utilization rate of bamboo is less than 40%, and more than 60% is turned into processing residues as fuel or discarded, which not only wastes resources, but also pollutes the environment. Bamboo, as a kind of insoluble and infusible natural polymer material, cannot be processed by heat, pressure, etc. like plastic, metal and glass. Therefore, the processing and utilization of bamboo waste is limited to a certain extent. Studies have found that the products of bamboo liquefaction have certain fluidity and can be used as raw materials for various new polymer materials such as adhesives, phenolic resins, phenolic foams, polyurethane rigid foams, polyurethane soft foams, polyurethane semi-rigid foams, fibers and carbon fibers. , so that the utilization rate of bamboo reaches...
Claims
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IPC IPC(8): C08H8/00
Inventor 张金萍杜孟浩胡立松
Owner RES INST OF SUBTROPICAL FORESTRY CHINESE ACAD OF FORESTRY
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