Method for preparing carbon fiber containing polybenzimidazole compound material
A technology for polybenzimidazole and composite materials, which is applied in the field of preparation of polybenzimidazole composite materials, can solve the problems of complicated operation, influence on mechanical properties of composite materials, oxidation of polybenzimidazole, etc., and achieves simple process and convenient large-scale Production, reducing the effect of oxidation
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Embodiment 1
[0019] Add 1000mL polyphosphoric acid (H 6 P 4 o 13 ) and 2g carbon dioxide fibers. The above solution was sonicated for 60 minutes and stirred at room temperature for 4 hours. Then the flask was transferred to a silicone oil bath, and the temperature was raised to 100-105°C. Under the protection of nitrogen, slowly add 60.611g (0.153mol) 3 in the flask, 3'-diaminobenzidine diamine dihydrate tetrahydrochloride (C 12 h 14 N 4 2H 2 (0.4HCl), 24.9195g (0.15mol) isophthalic acid (C 8 h 6 o 4 ) and 100g phosphorus pentoxide. After the feeding is completed, keep the temperature at 165-175°C for 1 hour until the material is completely dissolved. Then react at 190-200° C. for 12 hours under the protection of nitrogen. After the reaction is finished, it is washed with water, 1-5% potassium hydroxide solution, water and methanol successively, filtered, and the filter cake is dried in a vacuum drier to obtain polybenzimidazole containing carbon fibers.
[0020] The polybenzi...
Embodiment 2
[0022] Add 1000mL polyphosphoric acid (H 6 P 4 o 13 ) and 2g carbon dioxide fibers. The above solution was sonicated for 60 minutes and stirred at room temperature for 4 hours. Then the flask was transferred to a silicone oil bath, and the temperature was raised to 100-105°C. Under the protection of nitrogen, slowly add 60.611g (0.153mol) 3 in the flask, 3'-diaminobenzidine diamine dihydrate tetrahydrochloride (C 12 h 14 N 4 2H 2 (0.4HCl), 29.1285g (0.1500mol) dimethyl terephthalate (C 10 h 10 o 4 ) and 100.00 g of phosphorus pentoxide. After the feeding is complete, raise the temperature to 160-170°C and keep the temperature constant for about 1 hour until the material is completely dissolved. Then react at 200° C. for 12 hours under the protection of nitrogen. After the reaction is finished, it is washed with water, 1-5% potassium hydroxide solution, water and methanol successively, filtered, and the filter cake is dried in a vacuum drier to obtain polybenzimidaz...
Embodiment 3
[0025] Add 1000mL polyphosphoric acid (H 6 P 4 o 13 ) and 1.8g oxidized carbon fiber. The above solution was sonicated for 60 minutes and stirred at room temperature for 4 hours. Then the flask was transferred to a silicone oil bath, and the temperature was raised to 100-105°C. Under nitrogen protection, slowly add 48.9355g (0.1530mol) 1,2,4,5-tetraaminobenzene dihydrate tetrahydrochloride (C 6 h 10 N 4 2H 2 (0.4HCl), 24.9195g (0.1500mol) isophthalic acid (C 8 h 6 o 4) and 100.00 g of phosphorus pentoxide. After the feeding is complete, raise the temperature to 160-170°C and keep the temperature constant for about 1 hour until the material is completely dissolved. Then, it was kept at 200° C. for 12 hours under the protection of nitrogen. After the reaction is finished, it is washed with water, 1-5% potassium hydroxide solution, water and methanol successively, filtered, and the filter cake is dried in a vacuum drier to obtain polybenzimidazole containing carbon fi...
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