Phase-change microcapsule for inhibiting pavement from being iced and preparation method
A technology of phase-change microcapsules and core materials, which is applied in the direction of microcapsule preparation, microsphere preparation, chemical instruments and methods, etc., can solve problems such as inability to effectively alleviate low-temperature diseases, and achieve the suppression of icing and frosting on the road surface and latent heat of phase change Large, anti-icing effect
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Embodiment 1
[0033] The preparation method of the phase-change microcapsules for inhibiting road surface icing of the present embodiment may further comprise the steps:
[0034] Step (1), pre-polymerization of wall materials:
[0035] Dissolve urea, melamine and formaldehyde in a three-necked flask with a molar ratio of 3:1:6, add 25ml of distilled water, gradually drop in triethanolamine, adjust the pH to 8.5, and stir at a speed of 400r / min and an oil bath temperature of 70°C , react for 1h until the solution is clear and transparent, which is the prepolymer of melamine-modified urea-formaldehyde resin.
[0036] Step (2), emulsification of core material:
[0037] Add 0.3g of emulsifier sodium dodecylbenzenesulfonate to the beaker, add 100ml of distilled water to prepare a solution, add 10g of n-tetradecane into the aqueous solution, and disperse for 20min at a stirring speed of 600r / min , forming a stable oil-in-water (O / W) emulsion;
[0038] Step (3), the formation of microcapsules: ...
Embodiment 2
[0042] The preparation method of the phase-change microcapsules for inhibiting road surface icing of the present embodiment may further comprise the steps:
[0043] Step (1), pre-polymerization of wall materials:
[0044] Dissolve urea, melamine and formaldehyde in a three-necked flask with a molar ratio of 4:2:5, add 30ml of distilled water, gradually drop in triethanolamine, adjust the pH to 9.5, and stir at a speed of 300r / min and an oil bath temperature of 66°C , react for 1h until the solution is clear and transparent, which is the prepolymer of melamine-modified urea-formaldehyde resin.
[0045] Step (2), emulsification of core material:
[0046] Add 0.3g of emulsifier sodium dodecylbenzenesulfonate to the beaker, add 100ml of distilled water to prepare a solution, add 10g of n-tetradecane into the aqueous solution, and disperse for 15min at a stirring speed of 500r / min , forming a stable oil-in-water (O / W) emulsion;
[0047] Step (3), the formation of microcapsules: ...
Embodiment 3
[0051] The preparation method of the phase-change microcapsules for inhibiting road surface icing of the present embodiment may further comprise the steps:
[0052] Step (1), pre-polymerization of wall materials:
[0053] Dissolve urea, melamine, and formaldehyde in a three-necked flask with a molar ratio of 5:3:7, add 30ml of distilled water, gradually drop triethanolamine, adjust the pH to 9, and stir at a speed of 500r / min and an oil bath temperature of 75°C , React for 2h until the solution is clear and transparent, which is the prepolymer of melamine-modified urea-formaldehyde resin.
[0054] Step (2), emulsification of core material:
[0055] Add 0.3g of emulsifier sodium dodecylbenzenesulfonate to the beaker, add 100ml of distilled water to make a solution, add 10g of n-tetradecane into the aqueous solution, and disperse for 30min at a stirring speed of 700r / min , forming a stable oil-in-water (O / W) emulsion;
[0056] Step (3), the formation of microcapsules:
[005...
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