Anti-corrosion and anti-fouling nano composite material containing graphene-based nano material/zinc oxide quantum dots and application thereof
A technology of nanocomposite materials and nanomaterials, applied in the application field of anti-corrosion and anti-fouling nano-fillers in polymer coatings, can solve problems such as poor comprehensive performance, achieve enhanced anti-corrosion and anti-fouling performance, low preparation cost, and antibacterial effect strong effect
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Embodiment 1
[0040] Silane-functionalized nanohybrids of graphene oxide / zinc oxide quantum dots were used as antifouling nanofillers in waterborne epoxy coatings and applied by brushing onto cleaned steel substrates. Graphene oxide at a concentration of 10 mg / mL was purchased from Suzhou Carbonfeng Graphene Technology Co., Ltd., China.
[0041] 2.20g Zn(Ac)2.2H 2 O was refluxed in 100 ml of boiling absolute ethanol for 3 h, and then directly cooled to 0 °C in an ice-water bath to synthesize ZnO quantum dots. In another beaker, dissolve 0.58 g LiOH.HO in 50 mL absolute ethanol at 0 °C for 2 h at room temperature using an ultrasonic bath. The two solutions were mixed and stirred vigorously at 0°C for 120 minutes. Then, deionized water was added to the mixture under vigorous stirring to precipitate ZnO nanocrystals. The supernatant was removed by centrifugation, and the zinc oxide precipitated nanocrystals were dispersed in deionized water, followed by drying in an oven at 60° C. to obtain...
Embodiment 2
[0057] 1) Zinc oxide quantum dots are prepared by a sol-gel method as follows:
[0058] Zinc acetate is dissolved in water-ethanol solvent, and the volume ratio of deionized water and ethanol in the solvent is 2:1. The concentration of zinc acetate in the mixed solvent was 0.1 g / mL. In another beaker, 0.02 g of NaOH was dissolved in 1 mL of water-ethanol solvent containing a volume ratio of deionized water to ethanol equal to 2:1. Then, 100 mL of zinc acetate solution and 200 mL of sodium hydroxide solution were stirred continuously for 10 hours in a closed beaker at 70°C. Finally, the solution was cooled to room temperature and a white precipitate could be seen. The precipitate was separated by centrifuge and washed with acetone to remove unreacted products. The white product was dried in a vacuum oven at 30 °C to obtain ZnO quantum dots.
[0059] 2) Nanohybrids of graphene oxide and zinc oxide quantum dots were synthesized by a solvothermal method as follows: 50 mL of gr...
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