Low-ice-adhesion anti-icing coating, and preparation method and application thereof
A technology of anti-icing and adhesion, applied in coatings, polyurea/polyurethane coatings, etc., can solve problems such as loss of lubricating layer, high cost of antifreeze protein preparation, environmental hazards, etc.
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[0057] As mentioned above, the present invention provides a method for preparing an anti-icing coating with low ice adhesion. In a preferred embodiment of the present invention, the specific preparation method of the anti-icing coating includes:
[0058] (1) Dissolve a certain ratio (stoichiometric or excessive) of prepolymer and crosslinking agent with free chain components (may not be added), or dissolve a certain quality of long-chain polymer, mix well, and centrifuge at 6000r / min for 10min , Evacuating in a vacuum drying oven for 0.5h to remove air bubbles to obtain the anti-icing coating;
[0059] (2) Apply the paint of step (1) after the bubbles are removed on the surface of the cleaned substrate, level it into a film with a uniform thickness of 0.01 ~ 2.5 mm, and heat it (or UV cure) to obtain the Anti-icing coating.
[0060] In the present invention, the curing temperature is controlled at 25-70°C and the curing time is controlled at 2h-24h, so that coating materials with va...
Example Embodiment
[0069] Example 1
[0070] Change the mass ratio of prepolymer and crosslinker in Sylgard 184 to reduce the modulus of the polymer elastic network and realize low ice adhesion of anti-icing coating. Free chains are siloxane prepolymers or crosslinkers in excess.
[0071] Mix the prepolymer and crosslinking agent in Sylgard 184 according to the mass ratio of 5:1, 10:1, 20:1, 30:1, 40:1, 50:1, centrifuge at 6000r / min for 10min, and dry in vacuum Vacuum the box for 30 minutes to remove air bubbles.
[0072] Use clean silicon wafers as substrates, spread them in a petri dish, level them into a coating of about 1.6 mm, and cure at 70°C for 12.5 hours to obtain an anti-icing coating with low ice adhesion.
[0073] When the ambient temperature is -30°C and the ambient humidity is 50%, freeze for 5 hours to test its anti-icing performance.
[0074] The results show that: by figure 1 It can be seen that when the ratio of siloxane prepolymer and crosslinking agent is 10:1, the anti-icing ability...
Example Embodiment
[0075] Example 2
[0076] The temperature and time of the cross-linking reaction between the siloxane prepolymer and the cross-linking agent in Sylgard 184 were changed to control the modulus of the polymer elastic network, and the effect on the low ice adhesion of anti-icing coatings was studied. Free chains are siloxane prepolymers in excess.
[0077] The siloxane prepolymer and crosslinker in Sylgard 184 were mixed uniformly at a mass ratio of 50:1, centrifuged at 6000r / min for 10min, and vacuumed in a vacuum drying oven for 30min to remove air bubbles.
[0078] (1) Use a clean silicon wafer as a substrate, spread it in a petri dish, level it into a coating of about 1.6mm, and cure at 70°C for 1h-12.5h to obtain an anti-icing coating.
[0079] (2) Use a clean silicon wafer as the substrate, spread it in a petri dish, level it into a coating of about 1.6mm, and cure it at 25°C, 70°C, 80°C, and 150°C for 12.5 hours to obtain an anti-icing coating Floor.
[0080] When the ambient temp...
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