Block copolymer, composite particle, ink, and preparation method and application thereof
A technology of block copolymers and composite particles, applied in applications, inks, chemical instruments and methods, etc., can solve problems affecting the injection balance of inorganic nanomaterial films, poor uniformity of inorganic nanomaterial films, and low viscosity of printing inks, etc., to achieve Effects of avoiding energy transfer, improving hole transport performance, and reducing energy barrier
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[0072] Preparation method of ink
[0073] Another aspect of the present invention provides a method for preparing ink, including the following steps:
[0074] S01. Provide inorganic nanoparticles, block copolymers and organic solvents;
[0075] S02. Disperse the block copolymer and inorganic nanoparticles in an organic solvent to form the inorganic nanoparticle ink.
[0076] The ink preparation method provided by the embodiment of the present invention only needs to disperse inorganic nanoparticles in an organic solvent, the operation is simple and easy to control, does not require harsh conditions, and can realize mass production.
[0077] Specifically, in the above step S01, the types and contents of the inorganic nanoparticles, block copolymers, and organic solvents have been stated above, and in order to save space, the details are not repeated here.
[0078] The block copolymers provided in the embodiments of the present invention can be prepared by themselves, and are preferably sy...
Embodiment 1
[0108] A preparation method of block polymer modifier SH-A-B (SH-I-B) includes the following steps:
[0109] Provide the functional monomer of formula I block chain 3-vinyl-N-methyl-carbazole 5g, free radical initiator azobisisobutyl cyanide (AIBN) 5mg, dithiobenzoic acid phenethyl ester 60mg The mixture was dispersed in 50 mL of tetrahydrofuran, and the oxygen in the mixture was removed by vacuum-liquid nitrogen degassing several times, filled with nitrogen, and heated to 50°C, and polymerized for 48 hours. The reactant mixture was placed in liquid nitrogen and cooled for a few seconds to terminate the chain transfer reaction, and then n-hexane was precipitated to obtain 3.6 g of the first functionalized polymer chain macromolecule RAFT reagent.
[0110] Disperse 3g of the functionalized polymer chain macromolecule RAFT reagent, 2g of styrene, 2mg of AIBN, in 50mL of tetrahydrofuran, vacuum-liquid nitrogen degassing several times to remove the oxygen in the mixture, fill with nitr...
Embodiment 2
[0114] A method for preparing an inorganic nanoparticle film includes the following steps:
[0115] 500 mg of the polymer prepared in Example 1 was mixed with 20 g of dodecane, heated to 100° C. to dissolve for 30 minutes, and filtered with a 1 μ filter membrane to obtain a ready-to-use polymer solution. 1.5 g of the red CdSe / ZnS quantum dots stabilized by oleylamine and 8.5 g of the polymer solution were mixed and stirred for 30 minutes, and filtered with a 0.45 μ filter membrane to obtain quantum dot ink.
[0116] It is printed by an inkjet printer into a red quantum dot layer of 20×30um and a resolution of 200×200ppi.
[0117] Heat to 100℃ on hot plate, vacuum 1×10 under nitrogen flow -6 Volatilize and dry under Torr for 30 minutes to obtain a monochromatic quantum dot light-emitting layer.
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