Preparation method of graphene oxide-polyethylene glycol cross-linked network/carbon microsphere composite material
A polyethylene glycol, cross-linked network technology, applied in the field of nanomaterials, can solve problems such as softening and affecting performance, and achieve the effects of enhancing strength, improving service life, and improving friction stability
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[0031] As a specific embodiment of the present invention, a preparation method of graphene oxide-polyethylene glycol crosslinked network / carbon microsphere composite material comprises the following steps:
[0032] 1) Using glucose solution as carbon source, through hydrothermal reaction, the temperature of hydrothermal reaction is 180°C, and the time is 12h. After the completion, the product is washed several times, suction filtered, and dried to obtain carbon microspheres. The concentration of glucose solution is 40mg / mL;
[0033] 2) Dissolve the dry carbon microspheres in a mixed solution of deionized water and absolute ethanol (the volume ratio of deionized water and absolute ethanol is 1:9), and every 100mL of deionized water and absolute ethanol Add 0.4g carbon microspheres in the solution, then add the mixed solution of silane coupling agent and absolute ethanol (silane coupling agent adopts KH550, the mixed solution of silane coupling agent and absolute alcohol is spec...
Embodiment 1
[0040] 1) Prepare a glucose solution with a concentration of 40 mg / mL, conduct hot water thermal reaction at 180°C for 12 hours, wash the product several times, filter it with suction, and dry it in an oven at 80°C for 12 hours to obtain carbon microspheres;
[0041] 2) Dissolve 0.4g of dry carbon microspheres in a mixed solution of 10ml of deionized water and 90ml of absolute ethanol, add 5ml of silane coupling agent and 25ml of absolute ethanol to prepare the mixed solution, and react under reflux at 70°C After 12 hours, the product was washed several times, filtered with suction, and dried in an oven at 80°C for 12 hours to obtain modified carbon microspheres;
[0042] 3) The dried modified carbon microspheres, water and polyethylene glycol are formulated into solution A, wherein the concentration of modified carbon microspheres in solution A is 5 mg / mL, and the amount of polyethylene glycol added is modified carbon 0.5wt% of the microsphere mass, continuous stirring;
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Embodiment 2
[0046] 1) Prepare a glucose solution with a concentration of 40 mg / mL, conduct hot water thermal reaction at 180°C for 12 hours, wash the product several times, filter it with suction, and dry it in an oven at 80°C for 12 hours to obtain carbon microspheres;
[0047] 2) Dissolve 0.4g of dry carbon microspheres in a mixed solution of 10ml of deionized water and 90ml of absolute ethanol, add 5ml of silane coupling agent and 25ml of absolute ethanol to prepare the mixed solution, and react under reflux at 70°C After 12 hours, the product was washed several times, filtered with suction, and dried in an oven at 80°C for 12 hours to obtain modified carbon microspheres;
[0048] 3) The dried modified carbon microspheres, water and polyethylene glycol are formulated into solution A, wherein the concentration of modified carbon microspheres in solution A is 5 mg / mL, and the amount of polyethylene glycol added is modified carbon 0.5wt% of the microsphere mass, continuous stirring;
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