A kind of modified graphene oxide and preparation method thereof
A technology of graphite oxide and graphene, applied in chemical instruments and methods, rayon manufacturing, chemical characteristics of fibers, etc., can solve the problem that the number of amine groups cannot be accurately quantified, and achieve the effect of reducing cross-linking and increasing lamellar spacing.
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Embodiment 1
[0019] Embodiment 1, a kind of modified graphene oxide, is made by the raw material of following weight ratio, graphene oxide 10 parts, polyamine 10 parts, the mixture that is made up of polyisocyanate and monoisocyanate 20 parts, solvent 1000 parts, wherein , the molar ratio of the isocyanate in the polyisocyanate to the isocyanate in the monoisocyanate is 0.5, and the molar ratio of the -NCO group in the isocyanate mixture to the -NH2 group in the polyamine is 1;
[0020] The polyamine is selected from one or more of ethylenediamine, propylenediamine, pentamethylenediamine and diethylenetriamine;
[0021] The polyisocyanate is selected from 4,4-diphenylmethane diisocyanate, 2,4-diphenylmethane diisocyanate, toluene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, 1,4- One or more of phenylene diisocyanate, 1,3-benzene diisocyanate, and hexamethylene diisocyanate;
[0022] The monoisocyanate is selected from one or more of phenyl isocyanate, p-toluene isocy...
Embodiment 2
[0025] Embodiment 2, a kind of modified graphene oxide, is made by the raw material of following weight ratio, graphene oxide 10 parts, polyamine 50 parts, the mixture that is made up of polyisocyanate and monoisocyanate 200 parts, solvent 2000 parts, wherein , the mol ratio of the isocyanate in the polyisocyanate to the isocyanate in the monoisocyanate is 2.5, the -NCO group in the isocyanate mixture and the -NH in the polyamine The mol ratio of the group is 1.25; The selection of each raw material is the same as in Example 1 .
[0026] The preparation method is as follows: dissolving and dispersing graphene oxide in a solvent to obtain a dispersion liquid, adding polyamine to the dispersion liquid, raising the temperature to 120°C after adding, performing reduction modification reaction on graphene oxide, and reacting After 48 hours, the temperature was adjusted to 100°C, and a mixture of polyisocyanate and monoisocyanate was added. After 48 hours of reaction, the product wa...
Embodiment 3
[0027] Embodiment 3, a kind of modified graphene oxide, is made by the raw material of following weight ratio, graphene oxide 10 parts, polyamine 25 parts, the mixture that is made up of polyisocyanate and monoisocyanate 100 parts, solvent 500 parts, wherein , the -NCO group in the isocyanate mixture and the -NH in the polyamine The mol ratio of the group is 1.00, and the mol ratio of the isocyanate in the polyisocyanate to the isocyanate in the monoisocyanate is 4.80; The selection of each raw material is the same as in Example 1 .
[0028] The preparation method is as follows: dissolving and dispersing graphene oxide in a solvent to obtain a dispersion liquid, adding polyamine to the dispersion liquid, raising the temperature to 100°C after adding, performing reduction modification reaction on graphene oxide, and reacting After 25 hours, the temperature was adjusted to 70°C, and a mixture of polyisocyanate and monoisocyanate was added. After 24 hours of reaction, the product...
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