A kind of LED encapsulation silicone
A technology of LED encapsulation and silica gel, applied in the direction of adhesives, adhesive additives, electrical components, etc., can solve problems such as delamination, and achieve the effect of increasing the refractive index, improving stability, and high refractive index
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[0041] Further, the surface-modified nano-diamonds are prepared by the following method: white oil, siloxane coupling agent and nano-diamonds are mixed, and the mass ratio of the siloxane coupling agent and nano-diamonds is 2:1 , stirred evenly at 60-80°C, separated to obtain solids, dried at 120-150°C, -0.1-0.99Mpa for 60-120min, and obtained the surface-modified nano-diamond of claim 1; the silicon The oxane coupling agent is selected from one or more of γ-glycidyloxypropyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane and vinyltrimethoxysilane.
[0042] It can be seen from the above description that this embodiment provides a specific method for surface modification of nano-diamonds. Nano-diamonds are mainly grown by vapor phase deposition method, such as ICP, PECVD, MOCVD and other semiconductor process equipment. The particle size D50 is 10-100nm, and the thermal conductivity is 2300W / mk. And hydrophobicity, can prevent the intervention of air water vapor, avoid ...
Embodiment 1
[0055] 1. Preparation of surface-modified nanodiamonds
[0056] Take 50ml of white oil and put it into a 100ml beaker, add 0.10g of γ-glycidyl etheroxypropyl trimethoxysilane, add 0.05g of nano diamonds into the beaker, stir at 80°C for 20min, filter, and wash with toluene for 3 times , centrifuged, and dried at 150°C and -0.99Mpa for 120min to obtain surface-modified nano-diamonds.
[0057] 2. Preparation of LED packaging silica gel
[0058] 80 mass parts of polysiloxane A of 7000mPa.s, 20 mass parts of polysiloxane B of 500mPa, 0.2 mass parts of surface-modified nano-diamonds, 0.001 mass parts of curing accelerator and 0.0001 of curing inhibitor Under the action of the disperser, make it disperse evenly, remove the air bubbles in the vacuum defoamer, put the initial glue on the 50W COB after solid crystal and wire bonding, and heat at 80°C for 1h , and then heated at 150° C. for 3 hours for curing treatment, and then tested the optical brightness and attenuation life of th...
Embodiment 2
[0060] 1. Preparation of surface-modified nanodiamonds
[0061] Take 50ml of white oil and put it into a 100ml beaker, add 0.10g of γ-methacryloxypropyltrimethoxysilane, add 0.05g of nano-diamonds into the beaker, stir at 60°C for 20min, filter, and wash with toluene 3 times, centrifuge, and dry at 120°C and -0.1Mpa for 60min to obtain surface-modified nano-diamonds.
[0062] 2. Preparation of LED packaging silica gel
[0063] 90 mass parts of polysiloxane A of 8000mPa.s, 10 mass parts of polysiloxane B of 400mPa, 0.02 mass parts of nano-diamonds, 0.002 mass parts of curing accelerator and 0.0005 of curing inhibitor were dispersed in Under the action of the machine, make it disperse evenly, remove the air bubbles in the vacuum defoaming machine, point the initial glue on the 50W COB with crystal solidification and wire bonding, heat at 100°C for 0.5h, and then put it on Heating at 150° C. for 2 hours for curing treatment, and then testing the optical brightness and attenuati...
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