Composite material with self-healing/damping composite function as well as preparation and application
A composite function and composite material technology, applied in the field of polymer materials and functional coatings, can solve the problem of single self-healing performance or damping performance of functional polymer materials, damping performance that cannot meet higher requirements, and narrow polymer damping temperature range and other problems, to achieve the effect of simple and easy doping and blending operation, economy and convenience, and wide application
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[0029] The preparation method of the composite material with self-healing / damping composite function of the present invention comprises the following steps:
[0030] Step 1, under inert gas atmosphere, Na 2 Se 2 The aqueous solution is added to the 11-bromo-1-undecanol solution, heated to 40°C-60°C to react to obtain a light yellow solid, and the light yellow solid is purified to obtain a yellow powder, which is a hydroxyl-terminated diselenide bond monomer;
[0031] Step 2, under an inert gas atmosphere, slowly add the diisocyanate solution to the diol, heat and react for a period of time, and then add the hydroxyl-terminated diselenide bond monomer dropwise to continue the reaction to obtain a polyurethane system;
[0032] Step 3: Add epoxy resin to the polyurethane system obtained in step 2 and stir evenly at 80°C to 90°C, then lower the temperature to 18°C to 25°C and add 6% to 10% of the mass of epoxy resin curing agent to continue stirring to obtain polyurethane - Ep...
Embodiment 1
[0048] Weigh 0.57g of sodium borohydride and dissolve it in 10ml of deionized water, slowly add 0.595g of selenium powder in an ice bath with continuous stirring, react for 10 minutes under continuous stirring, then continue to add 0.595g of selenium powder, and stir in a steam bath at 60°C for 12 hours , to obtain an aqueous sodium selenide solution for subsequent use.
[0049] Weigh 1g of 11-bromoundecyl alcohol and dissolve it in 10ml of tetrahydrofuran, protect it with nitrogen after vacuuming, inject 3ml of the prepared sodium selenide aqueous solution with a syringe, raise the temperature to 50°C and stir for 24h; then transfer the system out and purify it through a chromatographic column (The eluent is 4:1 dichloromethane:ethyl acetate). Finally, the solvent was removed by rotary evaporation to obtain a yellow powder product, that is, a hydroxyl-terminated diselenide bond monomer. The above steps were repeated 3 times to accumulate and prepare a yellow powder product for...
Embodiment 2
[0053] Weigh 1.14g of sodium borohydride and dissolve it in 10ml of deionized water, slowly add 1.19g of selenium powder in an ice bath with continuous stirring, react for 10 minutes under continuous stirring, then continue to add 1.19g of selenium powder, and stir in a steam bath at 60°C for 12 hours , to obtain an aqueous sodium selenide solution for subsequent use.
[0054] Weigh 1g of 11-bromoundecyl alcohol and dissolve it in 10ml of tetrahydrofuran, protect it under nitrogen after vacuuming, inject 1.5ml of the prepared sodium selenide aqueous solution with a syringe, raise the temperature to 50°C and stir for 24h; then transfer the system out through the chromatographic column Purify (the eluent is 4:1 dichloromethane:ethyl acetate), and finally remove the solvent by rotary evaporation to obtain a yellow powder product, which is a hydroxyl-terminated diselenide bond monomer for future use.
[0055] Next, 0.84g HDI is dissolved in the DMF solution that obtains HDI in 12....
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