A kind of preparation method of graphene/epoxy resin anticorrosion coating
An epoxy resin and anti-corrosion coating technology, applied in epoxy resin coatings, anti-corrosion coatings, coatings, etc., can solve the problems of easy agglomeration and poor dispersion, and achieve the effect of easy agglomeration, low volatility and excellent anti-corrosion performance.
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[0020] A kind of preparation method of environment-friendly functional graphene / epoxy resin composite anticorrosion coating of the present invention comprises the following steps:
[0021] 1) In parts by weight, add 0.4-0.8 parts of graphene oxide prepared by Hummers method and mechanical exfoliation into 70-80 parts of anhydrous N,N-dimethylformamide and ultrasonically disperse it for 0.5-1h Dispersion A was obtained.
[0022] 2) Adjust the pH value of the dispersion A to 10 with ammonia water, add 3.6-8.8 parts of isocyanate trimer to it, and react in a reactor at 60-80° C. for 2-4 hours to obtain the mixed solution B.
[0023] 3) Add 0.3-0.6 parts of reducing agent to the mixed solution B and continue the heat preservation reaction for 7-9 hours to obtain the mixed solution C. The mixed solution C is centrifuged and washed 3 times and dried to obtain the isocyanate trimer functionalized graphene.
[0024] 4) Ultrasound 0.1% to 0.9% of isocyanate trimer functionalized graph...
Embodiment 1
[0028] 1) In parts by weight, 0.4 parts of graphene oxide prepared by Hummers method and mechanical exfoliation were added to 70 parts of anhydrous N,N-dimethylformamide and ultrasonically dispersed for 0.5 h to obtain dispersion A.
[0029] 2) Adjust the pH value of the dispersion A to 10 with ammonia water, add 3.6 parts of toluene diisocyanate trimer to it, and react in a reactor at 60° C. for 2 hours to obtain a mixed solution B.
[0030] 3) Add 0.3 parts of sodium borohydride to the mixed solution B and continue the heat preservation reaction for 7 hours to obtain the mixed solution C, which is centrifuged and washed 3 times and dried to obtain the isocyanate trimer functionalized graphene.
[0031] 4) Ultrasound 0.1% of isocyanate trimer functionalized graphene in N-methylpyrrolidone for 30 minutes to obtain a uniform dispersion D, and compound the dispersion D with 100 parts of water-based E44 epoxy resin to obtain an environmentally friendly functionalized graphene / Ep...
Embodiment 2
[0033] 1) In parts by weight, 0.8 parts of graphene oxide prepared by Hummers method and mechanical exfoliation were added to 80 parts of anhydrous N,N-dimethylformamide and ultrasonically dispersed for 1 hour to obtain dispersion A.
[0034] 2) The pH value of the dispersion A was adjusted to 10 with ammonia water, 8.8 parts of hexamethylene diisocyanate trimer was added thereto and reacted in a reactor at 80°C for 4 hours to obtain a mixed solution B.
[0035] 3) Add 0.6 parts of ethylenediamine to the mixed solution B and continue the heat preservation reaction for 9 hours to obtain the mixed solution C, which is centrifuged and washed 3 times and dried to obtain the isocyanate trimer functionalized graphene.
[0036] 4) Ultrasonicate 0.9% of isocyanate trimer functionalized graphene in N-methylpyrrolidone for 30 minutes to obtain a uniform dispersion D, and compound the dispersion D with 100 parts of water-based epoxy resin (E44+E51) to obtain an environmentally friendly fu...
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