Quantum dot light diffusing agent and preparation method thereof
A light diffusing agent and quantum dot technology, applied in chemical instruments and methods, light guides, optics, etc., can solve problems such as poor stability and high cost, and achieve the effects of breaking through limitations, low equipment cost, and easy storage and transportation
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[0044] Combine figure 1 As shown, a method for preparing a quantum dot light diffusing agent includes the steps:
[0045] S1. Pre-treating polymethyl methacrylate to obtain a polymethyl methacrylate dispersion;
[0046] S2. Dissolve quantum dots and additives in a co-solvent to obtain a mixed solution A;
[0047] S3. Mix the mixed solution A with the polymethyl methacrylate dispersion to obtain the mixed solution B. Under the protection of inert gas, adjust the temperature and pH value of the mixed solution B, and perform purification treatment after fully stirring to obtain a quantum dot-containing Microsphere structure
[0048] S4. Dry the microsphere structure, and obtain a quantum dot light diffuser after grinding.
[0049] The method for preparing the quantum dot light diffusing agent provided by the embodiment of the present invention is to dissolve the quantum dots and additives together in a co-solvent, and then disperse them in the ionized modified polymethyl methacrylate disp...
Example Embodiment
[0081] Example 1
[0082] This embodiment provides a method for preparing a quantum dot light diffusing agent, and the specific steps are as follows:
[0083] Weigh 1 part of acrylic acid-modified polymethyl methacrylate, add it to an aqueous solution at 70°C, adjust the pH of the aqueous solution to 8, and stir for 1 hour to obtain a polymethyl methacrylate dispersion;
[0084] Weigh 0.001 part of quantum dot and 0.001 part of additive into 0.1 part of co-solvent to obtain mixed solution A, in which, 0.0005 part of antioxidant, 0.0005 part of light stabilizer, 0 part of crosslinking agent, and 0 part of coupling agent Copies
[0085] Add mixed solution A to the polymethyl methacrylate dispersion. The mass ratio of the polymethyl methacrylate dispersion to the mixed solution A is 20:1. Stir it evenly. Blow nitrogen for 30 minutes to remove the oxygen in the system. Warm up to 75°C and stir for 4 hours, mixed solution B, then adjust the pH of mixed solution B=5.5, stir for 1 hour, and...
Example Embodiment
[0087] Example 2
[0088] The difference between this embodiment and the foregoing embodiment is that the method for preparing a quantum dot light diffusing agent provided in this embodiment, the specific steps are as follows:
[0089] Weigh 1 part of acrylic acid-modified polymethyl methacrylate, add it to an aqueous solution at 60°C, adjust the pH of the aqueous solution to 7, and stir for 1 h to obtain a polymethyl methacrylate dispersion;
[0090] Weigh 0.3 parts of quantum dots and 0.3 parts of additives into 0.15 parts of co-solvent to obtain mixed solution A, in which 0 parts of antioxidants, 0 parts of light stabilizers, 0.15 parts of crosslinking agents, and 0.15 parts of coupling agents Copies
[0091] Add mixed solution A to the polymethyl methacrylate dispersion. The mass ratio of the polymethyl methacrylate dispersion to the mixed solution A is 2:1. Stir it evenly. Blow nitrogen for 30 minutes to remove the oxygen in the system. Warm up to 65°C and stir for 4 hours, mixe...
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