Graphene reinforced waterborne polyurethane high-barrier material and condom
A water-based polyurethane and graphene technology, used in male contraceptives and other directions, can solve the problems of poor interface compatibility between the graphene layer and the polymer layer, unstable condom performance, poor dispersion, etc., to improve mechanical properties and barrier properties. performance, increased interaction, good barrier properties
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Embodiment 1
[0065] A kind of graphene strengthens waterborne polyurethane high barrier material, is characterized in that, obtains by following method:
[0066] 1) Isocyanate functionalization of graphene oxide
[0067] 1.1) Dissolve 100mg of graphene oxide in 100ml of DMF, add 100mg of TDI and mix to obtain mixed solution A;
[0068] 1.2) The mixed solution A obtained in step 1.1) was ultrasonically dispersed for 30 minutes, reacted at 80°C for 24 hours and then cooled to room temperature,
[0069] 1.3) The product was centrifuged and washed 3 times with ether to obtain product B;
[0070] 1.4) The product B was dried at 60° C. for 12 hours to obtain isocyanate-functionalized graphene oxide (GONCO).
[0071] 2) Preparation of graphene / water-based polyurethane emulsion:
[0072] 2.1) Weigh 5.2g of GONCO and 80g of polypropylene oxide polyol (polyether polyol A) with an average molecular weight of 2000, and vacuumize at 110°C for 1h;
[0073] 2.2) Cool down to 70°C, add 30.5g diphenylm...
Embodiment 2
[0097] A kind of graphene strengthens waterborne polyurethane high barrier material, is characterized in that, obtains by following method:
[0098] 1) Isocyanate functionalization of graphene oxide
[0099] 1.1) Dissolve 120mg of graphene oxide in 100ml of DMF, add 100mg of TDI and mix to obtain mixed solution A;
[0100] 1.2) The mixed solution A obtained in step 1.1) was ultrasonically dispersed for 30 minutes, reacted at 80°C for 24 hours and then cooled to room temperature,
[0101] 1.3) The product was centrifuged and washed 3 times with ether to obtain product B;
[0102] 1.4) The product B was dried at 60° C. for 12 hours to obtain isocyanate-functionalized graphene oxide (GONCO).
[0103] 2) Preparation of graphene / water-based polyurethane emulsion:
[0104]2.1) Weigh 7.0g of GONCO and 80g of polypropylene oxide polyol (polyether polyol A) with an average molecular weight of 2000, and vacuumize at 110°C for 1h;
[0105] 2.2) Cool down to 70°C, add 29g of isophoron...
Embodiment 3
[0129] A kind of graphene strengthens waterborne polyurethane high barrier material, is characterized in that, obtains by following method:
[0130] 1) Isocyanate functionalization of graphene oxide
[0131] 1.1) Dissolve 150mg of graphene oxide in 100ml of DMF, add 100mg of TDI and mix to obtain mixed solution A;
[0132] 1.2) The mixed solution A obtained in step 1.1) was ultrasonically dispersed for 30 minutes, reacted at 80°C for 24 hours and then cooled to room temperature,
[0133] 1.3) The product was centrifuged and washed 3 times with ether to obtain product B;
[0134] 1.4) The product B was dried at 60° C. for 12 hours to obtain isocyanate-functionalized graphene oxide (GONCO).
[0135] 2) Preparation of graphene / water-based polyurethane emulsion:
[0136] 2.1) take by weighing 6.0g GONCO and 80g average molecular weight is 2000 polypropylene oxide polyol (polyether polyol A) and 20g average molecular weight is 1000 polyneopentyl glycol succinate polyol (polyeste...
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