Carbon fiber thermal insulation rigid tile and preparation method thereof
A technology of carbon fiber and thermal insulation tiles, which is applied in the field of functional composite materials, can solve the problems of insufficient mechanical strength and insufficient temperature resistance of rigid thermal insulation tiles, and achieve the effects of stable overall performance, strong oxidation resistance, and uniform distribution
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[0051] In a second aspect, the present invention provides a method for preparing a carbon fiber rigid thermal insulation tile. Please refer to figure 1 , is a process flow chart for the preparation of carbon fiber rigid insulation tiles according to a preferred embodiment of the present invention. Wherein, the preparation method comprises the steps of:
[0052] (1) obtain the wet billet of chopped carbon fiber by wet forming, obtain the dry billet of carbon fiber after drying;
[0053] (2) After mixing the silicone resin prepolymer, crosslinking agent, catalyst and organic solvent, a silicone resin precursor mixed solution is obtained;
[0054] (3) Use the silicone resin precursor mixture to impregnate the carbon fiber dry body, for example, impregnate the carbon fiber dry body through a vacuum impregnation process, so that the carbon fiber dry body absorbs the silicone resin precursor mixture, and then after room temperature curing, carbonization and high temperature heat t...
Embodiment 1
[0064]① Shorten carbon fibers with a diameter of 10 μm to a length of 2 mm, place the chopped carbon fibers in a kettle filled with acetone, and install a stirring and water-cooled reflux device on the top of the kettle. Turn on the stirring and water-cooling reflux device, heat the acetone to 55°C and reflux for 48 hours, and thoroughly clean off the epoxy resin adhesive attached to the surface of the carbon fiber. Filter the cleaned carbon fibers in the kettle through a filter, and dry them in a fume hood to fully volatilize the acetone.
[0065] ②Mix the chopped carbon fiber after degumming with deionized water according to the mass ratio of 1:150, fully stir and beat in the mixing tank, transfer the slurry to the filter tool, filter out most of the water, and then put the wet The billet is loaded into a shaping mold, the wet billet is pressed to a preset height according to the target density of the material, and dried at 120°C for 24 hours to obtain a carbon fiber dry bil...
Embodiment 2 to 22
[0072] Examples 2 to 22 were performed in the same manner as Example 1 except for the contents shown in Table 1 and Table 2 below. The mechanical strength of the prepared carbon fiber rigid insulation tile was tested, and the results are shown in Table 2.
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