Aramid nanofiber-based insulating composite film as well as preparation method and application thereof
A nanofiber and composite film technology, which is applied in the field of aramid nanofiber-based insulating composite film and its preparation, can solve the problems of insufficient insulation and mechanical properties of ANF-based composite materials, improve thermal conductivity and insulation performance, and improve stability Excellent performance and performance
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[0024] The invention provides a preparation method of an aramid nanofiber-based insulating composite film, which specifically includes the following steps:
[0025] Step 1. Add borax into deionized water, and stir magnetically for 0.5-1 h to obtain a borax solution with a mass percentage of 0.1%-0.5%.
[0026] Step 2, adding PVA into deionized water, heating and stirring for 0.5-1 h under the condition of a water bath, to obtain a PVA solution with a mass percentage of 0.5%-1%.
[0027] Step 3. Add the borax solution with a mass percentage of 0.1%-0.5% in step 1 to the PVA solution with a mass percentage of 0.5%-1% in step 2, then add deionized water, and mix to obtain a mass percentage of 0.5%- 1% Borax PVA solution.
[0028] Step 4, using deionized water and ANF / DMSO solution according to the volume ratio of (2-3): 1, to carry out replacement treatment, and the number of replacements is 3-5 times to obtain ANFs water dispersion; wherein, the ANFs water The mass percentage ...
Embodiment 1
[0035] The present embodiment 1 provides a preparation method of an aramid nanofiber-based insulating composite film, comprising the following steps:
[0036] Step 1. Add borax into deionized water and stir magnetically for 0.5h to obtain a borax solution with a mass percentage of 0.1%.
[0037] Step 2, adding PVA into deionized water, heating and stirring for 0.5h under the condition of a water bath, to obtain a PVA solution with a mass percentage of 0.5%.
[0038] Step 3, adding the borax solution with a mass percentage of 0.1% in step 1 to the PVA solution with a mass percentage of 0.5% in step 2, then adding deionized water, and mixing to obtain a borax PVA solution with a mass percentage of 0.5%.
[0039] Step 4, using deionized water and ANF / DMSO solution according to the ratio of volume ratio of 2:1 to carry out replacement treatment, the number of replacements is 3 times, to obtain ANFs aqueous dispersion; wherein, the mass percentage of the ANFs aqueous dispersion is:...
Embodiment 2
[0045] The present embodiment 2 provides a preparation method of an aramid nanofiber-based insulating composite film, comprising the following steps:
[0046] Step 1. Add borax into deionized water and stir magnetically for 0.6h to obtain a borax solution with a mass percentage of 0.25%.
[0047] Step 2, adding PVA into deionized water, heating and stirring for 0.6 h under the condition of a water bath, to obtain a PVA solution with a mass percentage of 0.6%.
[0048] Step 3, adding the 0.25% mass borax solution in step 1 to the 0.6 mass% PVA solution in step 2, then adding deionized water, and mixing to obtain 0.6 mass% borax PVA solution.
[0049] Step 4, using deionized water and ANF / DMSO solution according to the ratio of volume ratio of 2:1 to carry out replacement treatment, the number of replacements is 3 times, to obtain ANFs aqueous dispersion; wherein, the mass percentage of the ANFs aqueous dispersion is: 0.4%.
[0050] Step 5. Mix 2 g of the borax PVA solution in...
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Abstract
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