LED (light-emitting diode) lamp and radiating pipe thereof
A technology of heat pipes and shells, which is applied in the field of LED lamps and heat pipes, can solve problems such as difficulty in heat dissipation, and achieve the effects of increasing service life, improving heat dissipation performance, and improving thermal conductivity
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[0036] The preparation method of above-mentioned waterborne organic-inorganic hybrid resin is as follows:
[0037] (1) Preparation of nano-sol: Disperse commercially available nano-titanium dioxide, nano-silica, nano-alumina or nano-zirconia powder in an organic solvent by ultrasonic waves to form a corresponding nano-sol;
[0038] (2) Preparation of water-based organic-inorganic hybrid resin: Mix the metal alkoxide and trialkoxysilane with functional groups evenly according to the above ratio, and then add the nano-sol at a uniform speed according to the above ratio, and the solution becomes cloudy , continue to stir while adding phosphoric acid dropwise as a catalyst until the solution is transparent, thereby obtaining an organic-inorganic hybrid resin.
[0039] A few examples are listed below.
Embodiment 1
[0041] Step 1, dispersing commercially available nano-titanium dioxide powder (particle size 30nm) in butyl acetate by ultrasonic waves to form a silica sol with a concentration of 30% by mass;
[0042] Step 2: Mix 30mL of γ-aminopropyltriethoxysilane and 5mL of ethyl orthosilicate evenly by magnetic stirring, then add 15mL of titanium sol prepared in Step 1 at a constant speed, the solution becomes turbid, continue to stir while dropping Add 0.2mL of phosphoric acid as a catalyst, and the solution becomes transparent, thereby obtaining a water-based organic-inorganic hybrid resin. The number average molecular weight of the waterborne organic-inorganic hybrid resin measured by GPC was 11400, and the solid content was 50%.
Embodiment 2
[0044] Step 1, dispersing commercially available nano-titanium dioxide powder (particle size 30nm) in butyl acetate by ultrasonic waves to form a silica sol with a concentration of 30% by mass;
[0045] Step 2: Mix 20mL of methyltriethoxysilane and 5mL of ethyl orthosilicate evenly by magnetic stirring, then add 15mL of the silica sol prepared in Step 1 at a constant speed, the solution becomes turbid, continue stirring while adding 0.1 mL phosphoric acid is used as a catalyst, and the solution is transparent, thus obtaining a water-based organic-inorganic hybrid resin. The number average molecular weight of the waterborne organic-inorganic hybrid resin measured by GPC was 3400, and the solid content was 45%.
[0046] As one of the micro-nano heat dissipation powders, it can be metal or non-metal carbide, such as nano-tungsten carbide. Of course, it can also be nano carbides of other metals or non-metals such as silicon carbide, zirconium carbide, aluminum carbide or titanium...
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