Graphene modified adhesive and preparation method thereof
A graphene modification and adhesive technology, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problems of unstable adhesive properties, easy agglomeration, and low graphene content. , to achieve the effect of easy storage and use, and stable properties
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[0044] The present invention also provides a kind of preparation method of above-mentioned graphene modified adhesive, comprises the following steps:
[0045] The graphene oxide of 1 weight part is mixed and dispersed with an appropriate amount of organic solvent to prepare a graphene oxide dispersion;
[0046] Stirring and reacting 6.6-8.1 parts by weight of polyisocyanate and graphene oxide dispersion liquid at 78-82°C under the protection of nitrogen for 21-27 hours to prepare the first reaction liquid;
[0047] Add the first reaction solution dropwise to 13.5-16.5 parts by weight of polyester polyol at a temperature of 78-82°C under the protection of nitrogen, and stir for 1-3 hours to prepare the second reaction solution;
[0048] Mix 1-1.4 parts by weight of hydrophilic monomers and an appropriate amount of catalyst with the second reaction solution at a temperature of 83-87°C under nitrogen protection, and stir for 1-3 hours to prepare the third reaction solution;
[0...
Embodiment 1
[0067] 1 g of graphene oxide was placed in 150 mL of dimethylformamide, and ultrasonically dispersed to obtain a graphene oxide dispersion.
[0068] 7.34 g of isophorone polyisocyanate was added to the graphene oxide dispersion liquid, protected by nitrogen, and stirred at 80° C. for 24 hours to prepare a first reaction liquid.
[0069] 15 g of polyether diol was added into a four-necked flask, nitrogen gas was blown in, 8.34 g of the first reaction solution was slowly added dropwise, and the reaction was stirred and reacted at 80° C. for 2 hours to prepare the second reaction solution.
[0070] Mix 1.17g of 2,2-dimethylolpropionic acid, 1~2 drops of catalyst dibutyltin dilaurate with the second reaction solution, continuously feed nitrogen and raise the temperature to 85°C, and stir and react at 85°C for 2h , to prepare the third reaction solution.
[0071] Mix 0.46g of trimethylolpropane with the third reaction solution, add an appropriate amount of acetone to reduce the vi...
Embodiment 2
[0076] 1 g of graphene oxide was placed in 135 mL of dimethylformamide, and ultrasonically dispersed to obtain a graphene oxide dispersion.
[0077] 6.6 g of isophorone polyisocyanate was added to the graphene oxide dispersion liquid, protected by nitrogen, and stirred and reacted at 78° C. for 21 h to obtain a first reaction liquid.
[0078] 13.5 g of polyether diol was added into a four-necked flask, nitrogen gas was blown in, and 7.6 g of the first reaction solution was slowly added dropwise, and stirred and reacted at 78° C. for 1 h to prepare the second reaction solution.
[0079] Mix 1.0g of 2,2-dimethylolpropionic acid, 1~2 drops of catalyst dibutyltin dilaurate with the second reaction solution, continuously feed nitrogen and raise the temperature to 83°C, and stir and react at 83°C for 1h , to prepare the third reaction solution.
[0080] Mix 0.41g of trimethylolpropane with the third reaction solution, add an appropriate amount of acetone to reduce the viscosity of ...
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