A kind of porous activated carbon fiber and its preparation method
A porous activated carbon and fiber technology, applied in the chemical characteristics of fibers, melt spinning, textiles and papermaking, etc., can solve the problems of poor mechanical properties and high cost of activated carbon fiber preparation, and achieve improved material performance, improved spinning performance, and reduced manufacturing. cost effect
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[0055] The invention provides a kind of preparation method of porous activated carbon fiber, comprises the steps:
[0056] Step 1. Mix the lignin raw material with the modification treatment agent methyl formate, first add catalyst nickel powder to it, then add sodium hydroxide and p-anthraquinone to it, place the formed mixture in the reaction kettle and under certain conditions The lignin raw material is modified to obtain modified lignin; the chemical reaction process involved in step 1 is as follows figure 2 shown.
[0057] Specifically, in the above step 1, methyl formate is used as a treatment agent, and the lignin raw material is mixed with methyl formate, and the amount of methyl formate used is 5 to 20 times the quality of the lignin raw material; catalyst nickel powder is added thereto, The particle size is 500-1000 mesh, and the usage amount is 1.0-10% of the mass of the lignin raw material; 1.0-5.0% of the mass of the lignin raw material is added with sodium hydr...
Embodiment 1
[0074] The present embodiment provides a kind of preparation method of porous activated carbon fiber, comprises the steps:
[0075] Step 1, 200g lignin raw material (as listed in Table 1) is mixed with 2.0kg methyl formate, 800 mesh nickel powders of 10.0g are added thereto, and 6.0g sodium hydroxide and 1.3g p-anthraquinone; The mixture is sealed in In the reaction kettle, react at 120° C. for 1.8 h, and the stirring rate during the reaction is 300 rpm / min. The reaction mixture was magnetically separated to separate the nickel catalyst, the excess methyl formate was removed by distillation, and the remaining solid was washed with a hydrochloric acid solution with a mass concentration of 6% and deionized water until the pH value was 4; it was dried at 85°C in air, and finally the modified sexual lignin.
[0076] Step 2: Melt-mix spinning 100g of modified lignin with 10g of polyethylene oxide and 8g of bisphenol A aniline benzoxazine, the temperature of melt-mixing and spinnin...
Embodiment 2
[0083] The present embodiment provides a kind of preparation method of porous activated carbon fiber, comprises the steps:
[0084] Step 1. Mix 200g of alkali lignin raw material with 2.0kg of methyl formate, add 10.0g of 800-mesh nickel powder, 6.0g of sodium hydroxide and 1.3g of p-anthraquinone; seal the mixture in a reaction kettle at 120°C The reaction was carried out for 1.8 hours, and the stirring rate during the reaction was 300 rpm / min. The reaction mixture was magnetically separated to remove the nickel catalyst, the excess methyl formate was removed by distillation, and the remaining solid was washed with 6% hydrochloric acid solution and deionized water until the pH value was 4. Dry at 85°C in the air to finally obtain 166g of modified lignin.
[0085] Step 2, 100g of modified lignin and a certain amount of polyethylene oxide (PEO) and bisphenol A aniline benzoxazine (B-a) are melt-mixed and spun, and the temperature of the melt-mixed spinning is 152°C.
[0086] ...
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