Method for preparing carbon fiber reinforced inorganic polymer based composite material
An inorganic polymer and composite material technology, applied in cement production and other directions, can solve the problems of easy entanglement and agglomeration, uneven distribution, low bearing capacity, etc., and achieve the effect of increasing fiber content, high material strength, and uniform distribution
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specific Embodiment approach 1
[0010] Specific Embodiment 1: The preparation method of carbon fiber reinforced inorganic polymer matrix composite material in this embodiment is realized by adopting the following steps:
[0011] Step 1, configuring inorganic polymer batch materials: according to the molar ratio of potassium hydroxide and deionized water of 1:4 to 1:8, it is configured into a solution, and according to the molar ratio of silicon dioxide and potassium hydroxide of 0:1 to 6: 1 Add amorphous silica powder to the above solution, stir magnetically for 72-120 hours to obtain a mixed solution, place the container containing the mixed solution in an ice-water bath at a temperature of 0-5°C, The molar ratio of potassium oxide is 1:2~1:1. Add metakaolin powder to the mixed solution, and mechanically stir for 20~40min to obtain an inorganic polymer batch with a silicon / aluminum ratio of 1:1~4:1. Ion water adjusts the viscosity of the batch so that the shear rate is 60-80S -1 between 150mPa·s~500mPa·s; ...
specific Embodiment approach 2
[0016] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, 24.98g of potassium hydroxide is dissolved in 36ml of water to obtain potassium hydroxide solution, and 24g of amorphous silicon dioxide with an average particle diameter of 2.3 μm The powder was added to the potassium hydroxide solution, stirred magnetically for 72 hours to obtain a mixed solution, the container containing the mixed solution was placed in an ice-water bath with a temperature of 0°C, and 44.4g of metakaolin with an average particle size of 4.08μm was mechanically Slowly add into the mixed solution by stirring, and after 30 minutes of high-speed stirring, the silicon / aluminum ratio is 2:1 Inorganic polymer material batch is obtained, and the viscosity of the batch is adjusted by adding deionized water at a shear rate of 70S -1 200mPa·s; in step 2, ultrasonically disperse the 7mm chopped carbon fiber and absolute ethanol with a mass ratio of 1:20000 in absolute ethanol...
specific Embodiment approach 3
[0018] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the length of the chopped carbon fiber in step 2 is 2 mm. Others are the same as in the second embodiment.
[0019] The density of the composite material prepared in this embodiment is 1.41g / cm 3 , with a fiber volume content of 5.3%, the flexural strength and fracture work of the composite material reach 61.5MPa and 4143.0J / m respectively 2 , 3.67 times and 76.4 times higher than the unreinforced matrix material.
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