A method for improving the insulation performance of carbon fiber, modified carbon fiber and its application
A carbon fiber insulation, carbon fiber technology, used in carbon fiber, fiber processing, textiles and papermaking, etc., can solve the problems of difficult insulation materials, high dielectric constant, low resistivity, etc. fast effect
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Embodiment 1
[0061] A preparation method of modified carbon fiber is as follows:
[0062] (1) Oxidation process
[0063] Prepare 8 wt% H with deionized water 2 O 2 The solution was put into a 1000mL conical flask, the chopped carbon fibers were completely immersed, and the ultrasonic water bath was oxidized for 60min, the ultrasonic power was 300W, the frequency was 50000Hz, and the temperature was set at 45°C. Then rinse the surface-treated OCF with deionized water until neutral, put it in a vacuum oven at 105-115°C for 2 hours and then use it for later use.
[0064] (2) Cage polysilsesquioxane compound (POSS) + polymer coating process of carbon fiber under ultrasonic
[0065] Put 400mL of propylene glycol monoethyl ether / tetrahydrofuran mixture into a 1000mL conical flask, 10g of alkyl ketene dimer (AKD) (softening point is 52-54 ℃), add 200g of OCF, after ultrasonic vibration for 30min, add 6g The POSS compound (mixture of EP0435 and CA0296, 0.01 g of dicumyl peroxide and 0.1 g of b...
Embodiment 2
[0067] A preparation method of modified carbon fiber is as follows:
[0068] (1) Oxidation process
[0069] 10 wt% H with deionized water 2 O 2 The solution was put into a 500mL conical flask, the chopped carbon fiber (OCF) was completely immersed, and the ultrasonic water bath was oxidized for 30min, the ultrasonic power was 200W, the frequency was 40000Hz, and the temperature was set at 40°C. Then rinse the OCF with deionized water until it becomes neutral, and put it in a vacuum oven at 105-115°C for 2 hours before use.
[0070] (2) Cage polysilsesquioxane compound (POSS) + polymer coating process of carbon fiber under ultrasonic
[0071] Put 400mL of tetrahydrofuran and 8g of alkyl ketene dimer (AKD) (softening point of 52-54°C) into a 1000mL conical flask, ultrasonically disperse and dissolve; add 200g of dried OCF, ultrasonically disperse for 30min, add 0.2g of POSS compound EP0421, 0.08g of dibenzoyl peroxide and 0.24g of diallyl maleate; the reaction was carried ou...
Embodiment 3
[0073] A preparation method of modified carbon fiber is as follows:
[0074] (1) Oxidation process
[0075] 15 wt% H in deionized water 2 O 2 The solution was put into a 500mL conical flask, the chopped carbon fiber (OCF) was completely immersed, and the ultrasonic water bath was oxidized for 45min, the ultrasonic power was 150W, the frequency was 30000Hz, and the temperature was set at 40°C. Then rinse the surface-treated OCF with deionized water until neutral, put it in a vacuum oven at 105-115°C for 2 hours and then use it for later use.
[0076] (2) Cage polysilsesquioxane compound (POSS) + polymer coating process of carbon fiber under ultrasonic
[0077] Put 400mL of ethylene glycol monoethyl ether / tetrahydrofuran mixture and 15g of KY-120 polyketone resin (softening point of 100-110°C) into a 1000mL conical flask, and ultrasonically disperse and dissolve; add 200g of OCF, and ultrasonically disperse for 30min. Add 16g of POSS compound (mixture of SO1400 and EP0409), ...
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