A kind of carbon fiber reinforced polypropylene composite material and preparation method thereof
A composite material and carbon fiber technology, applied in the field of carbon fiber, can solve the problems of poor mechanical properties, poor compatibility between carbon fiber and polypropylene, etc., and achieve the effects of large flexural modulus, improved modification effect, and strong notched impact strength.
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Embodiment 1
[0040] The raw materials for the preparation of carbon fiber reinforced polypropylene composite materials are composed as follows according to parts by mass:
[0041]
[0042]
[0043] The carbon fiber is dipped in 10% ethanol diluent of acrylimidazolium tetrafluoroborate ionic liquid, and the carbon fiber is filtered out after being completely soaked. The carbon fibers treated in the above manner are dried at 50°C, and preliminarily pre-polymerized in an oven. The temperature of the oven is controlled at 80°C, and the time is 0.5 to 2 hours to obtain a carbon fiber prepolymer.
[0044] After mixing polypropylene, modifier, compatibilizer and processing aid in a high-speed machine for 3 to 5 minutes at high speed, the carbon fiber enters from the fiber inlet, and then granulates through a twin-screw machine. The first zone of the screw machine The temperature of the second zone is 200°C, the temperature of the second zone is 205°C, the temperature of the third zone is 21...
Embodiment 2
[0046] The raw materials for the preparation of carbon fiber reinforced polypropylene composite materials are composed as follows according to parts by mass:
[0047]
[0048] The 80% ethanol diluent of propenylimidazolium tetrafluoroborate ionic liquid is uniformly sprayed on the surface of the carbon fiber while the mixer is rotating at high speed. Dry the carbon fiber treated in the above way at 120°C, and preliminarily prepolymerize it under ultraviolet light. The light intensity of the ultraviolet prepolymerization does not exceed 2KW, and the irradiation time is 2 minutes to obtain a carbon fiber prepolymer.
[0049] After mixing polypropylene, modifier, compatibilizer and processing aid in a high-speed machine at high speed for 5 minutes, the carbon fiber enters from the fiber inlet, and then granulates through a twin-screw machine. The temperature of the first zone of the screw machine is 210°C, the temperature of the second zone is 210°C, the temperature of the thi...
Embodiment 3
[0051] The raw materials for the preparation of carbon fiber reinforced polypropylene composite materials are composed as follows according to parts by mass:
[0052]
[0053] The carbon fiber is dipped in a 35% aqueous diluent of acrylimidazolium tetrafluoroborate ionic liquid, and the carbon fiber is filtered out after being completely soaked. The carbon fibers treated by the above two methods were dried at 85°C, and preliminarily prepolymerized in a microwave oven with a power of 150W, and the reaction time in the microwave oven was within 20 minutes to obtain a carbon fiber prepolymer.
[0054]After mixing polypropylene, modifier, compatibilizer and processing aid in a high-speed machine for 4 minutes at high speed, the carbon fiber enters from the fiber inlet, and then granulates through a twin-screw machine. The temperature of the first zone of the screw machine is 205°C, 207°C in zone 2, 218°C in zone 3, 218°C in zone 4, 223°C in zone 5, 225°C in zone 6, and 232°C at...
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Abstract
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