A kind of highly dispersed graphene resin-based composite material and its preparation method and application
A composite material and graphene technology are applied in the field of low-cost preparation of highly dispersed graphene resin-based composite materials, and can solve the problems of long cycle, complicated preparation process, and unfavorable large-scale preparation of large-scale graphene resin-based composite materials. , to achieve the effect of low cost and simple preparation process
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Embodiment 1
[0033] Step 1. Mix the mesophase carbon microspheres with KOH at room temperature, add an appropriate amount of deionized water and a small amount of alcohol to stir and dissolve evenly, and then place them in an oven to dry to obtain a mixture. The mass ratio of mesophase carbon microspheres to KOH is 1: 5;
[0034] Step 2. Put the mixture in step 1 into a tube furnace, pass in protective gas, raise the temperature from room temperature to 1000 °C at a heating rate of 5 °C / min, keep it warm for 0.5 h, and then cool down to room temperature naturally;
[0035] Step 3: Soak the product in step 2 with 2 mol / L dilute hydrochloric acid at room temperature for 2 hours, and then wash it with deionized water until the pH value is 7 to obtain highly dispersed graphene particles.
[0036] Step 4, mechanically stirring and mixing the graphene particles with epoxy resin and acetone, then drying and evaporating the acetone to obtain a graphene-resin mixed slurry; wherein the amount of gra...
Embodiment 2
[0040] Step 1. Mix the mesophase carbon microspheres with KOH at room temperature, add an appropriate amount of deionized water and a small amount of alcohol to stir and dissolve evenly, and then place them in an oven to dry to obtain a mixture. The mass ratio of mesophase carbon microspheres to KOH is 1: 5;
[0041] Step 2. Put the mixture in step 1 into a tube furnace, pass in protective gas, and raise the temperature from room temperature to 1000°C for 0.5h at a heating rate of 5°C / min;
[0042] Step 3: Soak the product in step 2 with 2 mol / L dilute hydrochloric acid at room temperature for 2 hours, and then wash it with deionized water until the pH value is 7 to obtain highly dispersed graphene particles.
[0043] Step 4, mechanically stirring and mixing the graphene particles with epoxy resin and acetone, wherein the amount of graphene particles is 3vol.% of the composite material, and the acetone is 5wt.% of the resin mass.
[0044] Step 5: Mix the curing agent into the...
Embodiment 3
[0047] Step 1. Mix the mesophase carbon microspheres with KOH at room temperature, add an appropriate amount of deionized water and a small amount of alcohol to stir and dissolve evenly, and then place them in an oven to dry to obtain a mixture. The mass ratio of mesophase carbon microspheres to KOH is 1: 5;
[0048]Step 2. Put the mixture in step 1 into a tube furnace, pass in protective gas, and raise the temperature from room temperature to 1000°C for 0.5h at a heating rate of 5°C / min;
[0049] Step 3. Soak the product in step 2 with dilute hydrochloric acid with a concentration of 2 mol / L for 2 hours at room temperature, and then wash with deionized water until the pH value is 7 to obtain highly dispersed graphene particles.
[0050] Step 4, mechanically stirring and mixing the graphene particles with epoxy resin and acetone, wherein the amount of graphene particles is 5vol.% of the composite material, and the acetone is 8wt.% of the resin mass.
[0051] Step 5: Mix the c...
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