A kind of semi-carbonized modification method of plant fiber
A plant fiber and modification technology is applied in the field of semi-carbonization modification of plant fibers, which can solve the problems of discharging alkaline wastewater, secondary pollution, complex high-efficiency physical modification technology and other problems, achieve simple process and overcome the retarding effect. Effect
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Embodiment 1
[0018] The straw was thermally analyzed in the STA449C comprehensive analyzer produced by Netzsch in Germany at a rate of 5°C / min. The temperature of the ignition point was measured to be 313°C. 2 In the furnace chamber of the muffle furnace in the atmosphere, the room temperature is raised to 310 ° C for 30 minutes, and the semi-carbonized straw fiber is obtained with the furnace cooling down to room temperature, and the carbonization ratio is about 30%.
[0019] figure 1 This is the cross-sectional microstructure diagram of the modified plant fiber. It can be seen from the figure that the cross-sectional pore size of the modified plant fiber is 50-250 μm, and there are differences in the color of the inside and outside of the pore wall. The color of the layer is lighter, indicating that it is not completely carbonized; the outer layer will continue to be enlarged and analyzed in SEM, such as figure 2 , it can be clearly found that the outer layer of the fiber is composed o...
Embodiment 2
[0021] The corn stalks were thermally analyzed in the STA449C comprehensive analyzer produced by the German Netzsch company at a temperature of 2°C / min, and the ignition point was measured to be 344°C; a certain amount of carbon powder was pre-combusted in a closed furnace to form a low temperature Oxygen environment (O 2 Content < 1%), then cool down to room temperature, then put the corn stalks into the furnace and raise the temperature to 324°C for 100 minutes, then cool down to room temperature with the furnace to get semi-carbonized corn stalk fibers, and the carbonization ratio is about 60%.
Embodiment 3
[0023] The wheat straw is thermally analyzed in the Q5000 comprehensive analyzer produced by TA Instruments in the United States at a temperature increase of 2°C / min, and its ignition point is measured to be 330°C; a certain amount of carbon powder is pre-combusted in a closed furnace to form a low-oxygen environment (O 2 Content < 1%), then cooled to room temperature, then put corn stalks into the furnace and heated to 310°C for 120 minutes, then cooled to room temperature with the furnace to obtain semi-carbonized wheat straw fibers, the carbonization ratio of which was about 70%. Then according to the mass ratio, the obtained modified plant fiber 50%, α hemihydrate gypsum 10%, β hemihydrate gypsum 25%, polycarboxylate water reducer 0.5%, alkyl aromatic hydrocarbon sulfonic acid air-entraining agent 0.5%, The final product can be obtained by uniformly mixing 0.5% of dry aluminum powder with fat, 0.5% of methyl cellulose ether, 8% of lime and 5% of ordinary portland cement in...
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