Lewis acid-loaded chopped carbon fiber reinforced polyolefin composite material and preparation method thereof
A technology of chopped carbon fiber and Lewis acid, which is applied in the field of chopped carbon fiber reinforced polyolefin composite materials and its preparation, can solve the problems of weak bond strength and external stress affecting the overall performance of composite materials
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[0031] The present invention also provides a preparation method of chopped carbon fiber reinforced polyolefin composite material loaded with Lewis acid, the flow chart is as follows figure 1 shown, including the following steps:
[0032] Step 1: Disperse the Lewis acid powder in a solvent to prepare a Lewis acid solution; the solvent is preferably one or more of water, isopropanol, ethanol, acetone, methylene chloride, ethyl acetate, toluene, xylene kind, the concentration of the Lewis acid solution is preferably 0.01wt% to 1.0wt%;
[0033] Step 2: Immerse the unsized chopped carbon fiber in the Lewis acid solution. The soaking time is preferably 5-10 minutes. The carbon fiber is taken out and fully dried. The drying temperature is preferably 80-85°C, and the drying time is long Preferably it is 6-14h, obtains the chopped carbon fiber loaded on the Lewis acid;
[0034] Step 3: Melt blending polyolefin, compatibilizer, processing aid, and chopped carbon fiber loaded with Lewi...
Embodiment 1
[0040] Dissolve 0.5g of ferric chloride powder in 1L of water to prepare a solution. Immerse 10g of carbon fiber with a length of 10mm into the solution and place it in an ultrasonic device for ultrasonication for 5 minutes. After taking out the chopped carbon fiber, place the fiber in a room with a temperature of 80°C. Dried in the blast drying oven for 6 hours to obtain chopped carbon fibers loaded with ferric chloride, leaving the sample for scanning electron microscope observation, and the scanning electron microscope photo is figure 2 ; Subsequently, the remaining processed chopped carbon fibers were mixed with 40 g of polypropylene at a temperature of 60 rpm at a temperature of 180 ° C in an internal mixer, and a chopped carbon fiber reinforced polypropylene composite material was obtained after 10 minutes.
[0041] After the composite material is obtained, different test specimens are prepared according to the above-mentioned standards, and the structure and various mec...
Embodiment 2
[0049] Dissolve 0.5g of aluminum trichloride powder in 1L of water to prepare a solution. Immerse 10g of carbon fiber with a length of 10mm into the solution and place it in an ultrasonic device for 5 minutes. After taking out the chopped carbon fiber, place the fiber in a room with a temperature of 80°C. Dried in a blast oven for 12 hours to obtain chopped carbon fibers loaded with aluminum trichloride, and then mixed the processed chopped carbon fibers with 40 g of polypropylene at a temperature of 60 rpm at a speed of 180 ° C in an internal mixer for 10 Minutes later, chopped carbon fiber reinforced polypropylene composites were obtained.
[0050] After the composite material was obtained, different test specimens were prepared according to the above-mentioned standards to test its structure and mechanical properties. The tensile strength of the composite material is 62MPa, the bending strength is 72MPa, and the impact strength is 11.8kj / m 2 .
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