Modification method of activated carbon fiber and application thereof
A technology of activated carbon fiber and modification, applied in the field of modification of activated carbon fiber, can solve the problems of small adsorption capacity of methylene chloride, poor adsorption selectivity, reduced adsorption capacity, etc., and achieves fast processing speed, stable adsorption capacity and good stability. sexual effect
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Embodiment 1
[0029] The modification method of activated carbon fiber is:
[0030] (1) The pore size of the activated carbon fiber is adjusted, and the specific surface area is 1400m 2 / g of viscose-based activated carbon fiber is used as the modified raw material, placed in the activation furnace, with nitrogen as the carrier gas and protective gas, the heating rate is 5°C / min, and the water vapor is 6.5mL / min under the condition of 850°C, activation treatment After cooling for 0.5h, take it out and wash it with distilled water until the washing liquid is not turbid and the pH value is neutral, then boil it for 5min, take it out and place it in a vacuum drying oven, vacuum-dry it at 120°C for 2h, and cool it for later use.
[0031] (2) Chemical modification of activated carbon fibers. Take 20g of the activated carbon fiber whose pores have been adjusted and put it in a vacuum drying oven, and add 10g of polydimethylsiloxane (SYLGARD184 silicone rubber produced by Dow Corning Corporation ...
Embodiment 2
[0033] A modification method of activated carbon fiber, the concrete steps of the modification method are as follows:
[0034] (1) The pore size of the activated carbon fiber is adjusted, and the specific surface area is 1000m 2 / g Viscose-based activated carbon fiber is the modified raw material, placed in the activation furnace, the heating rate is 10 °C / min, nitrogen is used as the carrier gas and protective gas as the carrier gas and protective gas, and water vapor is 8 mL / min at 800 °C. min, activate for 1 hour, cool down with the furnace, take it out after cooling, rinse with deionized water repeatedly until the washing liquid is neutral, then boil with deionized water for 10 minutes, take the washed activated carbon fiber and place it in a vacuum drying oven, Vacuum dry at 120°C for 2 hours, cool down for later use;
[0035] (2) Chemical modification of activated carbon fibers. Take 20 g of activated carbon fibers whose pores have been adjusted and place them in a vacu...
Embodiment 3
[0037] The activated carbon fiber (modified fiber) and the raw material fiber obtained by the modification of the present invention were respectively subjected to static dichloromethane adsorption experiments. First, 40ml of dichloromethane was added to a 300ml glass desiccator, and the lid was closed. After the following time points Take 0.5g of dried raw fiber and modified fiber and put them on the baffle in the desiccator, take them out at 2min, 5min, 10min, 20min, 30min, and 60min respectively, weigh the mass change, calculate the unit adsorption amount, and draw the static adsorption curve, the result is as figure 1 shown.
[0038] It can be seen from the figure that the modified fiber and the raw fiber reach adsorption saturation at the same time, and the static methylene chloride adsorption capacity of the modified fiber is greater than that of the raw fiber. The activated carbon fiber pores were not blocked in large quantities. Thus, it is verified that the modified ...
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Abstract
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