Preparation method for dopamine modified glass fiber compounded aluminum nitride
A technology of glass fiber and aluminum nitride, which is applied in the field of materials, can solve problems affecting the thermal conductivity of aluminum nitride, achieve the effects of low reaction conditions and equipment requirements, simple process routes, and wide application prospects
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Embodiment 1
[0024] Choose alkali-free glass fibers with a diameter between 12 μm and 23 μm, burn the glass fibers at 600°C for 1 hour, wash them with deionized water three times, and dry them for later use. Dopamine was added to deionized water to prepare a 2 g / L dopamine aqueous solution, and its pH was adjusted to 8.5 with Tris-HCl. The pretreated glass fibers were added to the dopamine aqueous solution for magnetic stirring for 24 hours, then the glass fibers were filtered and washed with deionized water, and then dried at 60° C. to obtain the dopamine-modified glass fibers.
[0025] The composition of dopamine-modified glass fiber, dopamine, and ordinary glass fiber was analyzed by Fourier total reflection infrared spectroscopy, and the infrared spectrum was as follows: figure 1 shown. In the figure, the infrared spectrum peaks of dopamine are relatively more and sharper, with typical small molecule structure spectrum characteristics, at 3000cm -1 -3400cm -1 It can be observed that...
Embodiment 2
[0027]Add aluminum nitride powder with an average particle size of 1.50 μm to ethanol solvent and add stearic acid with 10% mass of aluminum nitride powder, stir evenly and let it stand for 2 hours, then add Tween with 3% mass of aluminum nitride powder 80, stirred at 60°C for 4 hours, and finally the filtered aluminum nitride powder was washed 3 times with ethanol solvent, and the modified aluminum nitride powder was obtained after drying. Disperse modified aluminum nitride powder accounting for 8% by weight of the glass fiber in distilled water, and ultrasonically vibrate for 10 minutes to form a stable modified aluminum nitride suspension. Then use a spray gun to spray the modified aluminum nitride suspension onto the surface of the dopamine-modified glass fiber prepared in Example 1. During the spraying process, care should be taken to spray evenly, and the glass fiber can be stirred with the help of other auxiliary tools or equipment.
[0028] Such as figure 2 and ima...
Embodiment 3
[0030] Add aluminum nitride powder with an average particle size of 1.50 μm to ethanol solvent and add stearic acid with 10% mass of aluminum nitride powder, stir evenly and let it stand for 2 hours, then add Tween with 3% mass of aluminum nitride powder 80, stirred at 60°C for 4 hours, and finally the filtered aluminum nitride powder was washed 3 times with ethanol solvent, and the modified aluminum nitride powder was obtained after drying. The modified aluminum nitride powder accounting for 9% by weight of the glass fiber was dispersed in distilled water, and ultrasonically oscillated for 10 minutes to form a stable modified aluminum nitride suspension. Then use a spray gun to spray the modified aluminum nitride suspension onto the surface of the dopamine-modified glass fiber prepared in Example 1. During the spraying process, care should be taken to spray evenly, and the glass fiber can be stirred with the help of other auxiliary tools or equipment.
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