Modified graphene enhanced impact-resistant polyurea coating and preparation method thereof
A graphene and impact-resistant technology, which is applied in the field of modified graphene-enhanced impact-resistant polyurea coating and its preparation, can solve the problems of poor dispersion of graphene, and achieve the promotion of dispersion, improvement of strength, tensile and anti-stretch Impact improvement effect
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Embodiment 1
[0063] In the following examples, the amino-modified graphene used is prepared by the following preparation method.
[0064] The preparation method of amino-modified graphene comprises the following steps:
[0065] (1) Weigh 0.1 part, 0.2 part, 0.4 part, 0.6 part, and 1 part of expandable graphite raw materials respectively, put them into a muffle furnace at 700°C to heat and expand for 1 min, and put them into five beakers respectively In the process, acetone solution was used as a solvent, and the ultrasonic cleaner was used to shake and disperse until uniform, and finally placed in a 65°C electric constant temperature drying oven for 12 hours to volatilize the acetone solvent to obtain the graphene required by the five components.
[0066] (2) Use a syringe to extract an appropriate amount of D2000 (graphene: D2000 solid-to-liquid ratio is 1g: 30mL) and the graphene of the five components prepared in the first step, respectively, and add them to the planetary ball mill jar,...
Embodiment 2
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[0072]
[0073] Prepolymerization process of A component
[0074] (1) Weigh 66.5 parts by mass of MDI-50, 27.5 parts by mass of PCL-205, and 6 parts by mass of propylene carbonate, and place them in an oven at 65°C for 2 hours for dehydration, and slowly dehydrate the dehydrated PCL-205 Add it into MDI-50 at a rate of 2mL / s, finally add propylene carbonate, and manually stir it with a glass rod at a constant speed for 5min to obtain a mixture A;
[0075] (2) Put the obtained mixed material A into the cell disruptor to further disperse for 10 minutes, and the cell disruptor setting parameters are: start-stop time, start 9s, stop 6s; total time 10min; horn Φ6; power ratio 20%;
[0076] (3) Finally, put the obtained dispersion solution A into an oil bath at 85° C. to react for 4 hours to obtain component A.
[0077] The preparation process of component B
[0078] (1) Weigh 54.5 parts by mass of D2000, 10.6 parts by mass of T5000, 23.5 parts by mass of DETDA, and ...
Embodiment 3
[0083]
[0084] Prepolymerization process of A component
[0085] (1) Weigh 70 parts by mass of MDI-50, 26 parts by mass of PCL-205, and propylene carbonate with 4 parts by mass, and place them in an oven at 65°C for 2 hours for dehydration, and slowly dehydrate the dehydrated PCL-205 Add to MDI-50 at a rate of 5mL / s, finally add propylene carbonate, and manually stir with a glass rod at a constant speed for 5min to obtain a mixture A;
[0086] (2) Put the obtained mixed material A into the cell disruptor to further disperse for 10 minutes, and the cell disruptor setting parameters are: start-stop time, start 9s, stop 6s; total time 10min; horn Φ6; power ratio 20%;
[0087] (3) Finally, put the obtained dispersion solution A into an oil bath at 85° C. to react for 4 hours to obtain component A.
[0088] The preparation process of component B
[0089] (1) Weigh 50.5 parts by mass of D2000, 14.5 parts by mass of T5000, 20 parts by mass of DETDA, and 14.8 parts by mass of Un...
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