CN-121991445-A - Perovskite quantum dot and acrylic copolymer compound, preparation method thereof and photochromic hot melt adhesive

Abstract

The invention discloses a compound of perovskite quantum dots and acrylic acid copolymer, a preparation method thereof and a photochromic hot melt adhesive, and belongs to the technical field of functional polymer materials. The complex of perovskite quantum dots and acrylic acid copolymer is composed of acrylic acid copolymer and perovskite quantum dot reaction matrix connected with the acrylic acid copolymer through chemical bonding. The perovskite quantum dot reaction matrix is formed by CsPbBr 3 quantum dots and oleic acid on the surface of the perovskite quantum dot reaction matrix, and the chemical bonding comprises the reaction of the oleic acid and hydroxyl and/or carboxyl in the acrylic acid copolymer. The compound has excellent photochromic response performance, good mechanical performance and stability. The mechanical property and the photochromic cycling stability of the photochromic hot-melt adhesive prepared by curing the compound are obviously improved.

Inventors

• PAN HONGWEI
• JIN BAOCHANG
• ZHANG HUILIANG
• BIAN JUNJIA
• ZHAO YAN
• YANG HUILI
• WANG MINGYU
• ZHANG RENHAO

Assignees

• 中国科学院长春应用化学研究所

Dates

Publication Date

20260508

Application Date

20260129

Claims (10)

1. 1. A complex of perovskite quantum dots and acrylic acid copolymer, which is characterized by comprising acrylic acid copolymer and perovskite quantum dot reaction matrix connected with the acrylic acid copolymer through chemical bonding; Wherein the acrylic copolymer is polymerized by acrylic ester monomers, acrylic acid monomers, styrene monomers and furoic acid monomers; The perovskite quantum dot reaction matrix consists of CsPbBr 3 quantum dots and oleic acid on the surface of the CsPbBr 3 quantum dots; The chemical bonding includes reaction of oleic acid with hydroxyl and/or carboxyl groups in the acrylic copolymer.
2. 2. The composite of claim 1, wherein the perovskite quantum dot reaction matrix content in the composite is 5wt% to 15wt%.
3. 3. The compound of claim 1, wherein the acrylic monomer is selected from one or more of butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, methyl acrylate, and methyl methacrylate.
4. 4. A compound according to any one of claims 1 to 3, wherein the molar ratio of styrene monomer to itaconic acid monomer is 1 (0.2 to 0.3); The molar ratio of the acrylic ester monomer to the acrylic acid monomer is (1-5): 1; the molar ratio of the perovskite quantum dot monomer to the styrene monomer is (0.003-0.1): 1; the molar ratio of the acrylic monomer to the styrene monomer is (1-4): 1.
5. 5. A method of preparing a complex according to any one of claims 1 to 4, comprising the steps of: Mixing acrylic ester monomer, acrylic acid monomer, styrene monomer, furoic acid monomer, initiator and perovskite quantum dot reaction matrix, and heating to obtain the composite.
6. 6. The method of claim 5, wherein the heating is at a temperature of 65 ℃ to 80 ℃.
7. 7. The method according to claim 5, wherein the initiator is one or more selected from azobisisobutyronitrile, benzoyl peroxide, potassium persulfate and ammonium persulfate.
8. 8. A photochromic hot melt adhesive prepared by curing a compound prepared by the method of any one of claims 1 to 4 or the method of any one of claims 5 to 7.
9. 9. The photochromic hot-melt adhesive of claim 8 wherein said curing temperature is from 40 ℃ to 50 ℃.
10. 10. Use of the photochromic hot-melt adhesive of claim 8 or 9 in the field of smart decoration or optics packaging.

Description

Perovskite quantum dot and acrylic copolymer compound, preparation method thereof and photochromic hot melt adhesive Technical Field The invention relates to the technical field of functional polymer materials, in particular to a perovskite quantum dot and acrylic acid copolymer compound, a preparation method thereof and a photochromic hot melt adhesive. Background The Hot melt adhesive (Hot Glue) is a plastic adhesive, the physical state of which changes with the temperature within a certain temperature range, and the chemical characteristics of which are unchanged, and the Hot melt adhesive is nontoxic and tasteless, and belongs to an environment-friendly chemical product. The product is solid, is convenient for packaging, transportation and storage, has no solvent, pollution and toxicity, and has the advantages of simple production process, high added value, high adhesive strength, high speed and the like. In recent years, hot melt adhesives are rapidly developed, so that the intellectualization of the hot melt adhesives is an important direction and challenge of current research. The photochromic hot melt adhesive is an intelligent functional material formed by embedding a photochromic material (such as perovskite quantum dots) into a hot melt adhesive matrix. The collagen can change reversibly in color or fluorescence under illumination, and meanwhile, the adhesive property of the hot melt collagen is reserved, so that the collagen has the potential of information encryption, dynamic display, environmental response and the like. The material combines the sensitivity of the photochromic polymer to light stimulus and the technological advantage of wide application of the hot melt adhesive, and is gradually applied to high-end anti-counterfeiting, intelligent packaging and optical information recording scenes. Acrylic adhesives have good adhesive properties but lack light response functions. Perovskite Quantum Dots (PQDs) are zero-dimensional perovskite materials, the crystal structure of which is similar to that of perovskite oxide (CaTiO 3), and the general formula is ABX 3 (a is an organic/inorganic cation, B is a metal ion, and X is a halogen anion). It has the advantages of excellent ‌ photoelectric property and high quantum yield, but has poor stability, sensitive to light, heat and humidity, and is easy to cause agglomeration or defect due to ligand falling. ‌ ‌ the photochromic hot-melt adhesive formed by embedding PQDs into the acrylic adhesive matrix, while providing the acrylic adhesive with a light responsive function, is still poor in stability, which severely limits further applications. Therefore, research and development of a novel photochromic hot-melt adhesive with excellent performance is important to intelligent development and application of the hot-melt adhesive. Disclosure of Invention In view of the above, the technical problem to be solved by the invention is to provide a compound of perovskite quantum dots and acrylic acid copolymer, a preparation method thereof and a photochromic hot melt adhesive. The compound has excellent photochromic response performance, good mechanical performance and stability. In order to achieve the above purpose, the invention adopts the following technical scheme: The invention provides a complex of perovskite quantum dots and acrylic acid copolymer, which consists of acrylic acid copolymer and perovskite quantum dot reaction matrix connected with the acrylic acid copolymer through chemical bonding; Wherein the acrylic copolymer is polymerized by acrylic ester monomers, acrylic acid monomers, styrene monomers and furoic acid monomers; The perovskite quantum dot reaction matrix consists of CsPbBr 3 quantum dots and oleic acid on the surface of the CsPbBr 3 quantum dots; The chemical bonding includes reaction of oleic acid with hydroxyl and/or carboxyl groups in the acrylic copolymer. The polymerization is radical polymerization. The perovskite quantum dot reaction matrix is used as a functional filler, and is combined with the acrylic copolymer through chemical bonding to form the compound, and the chemical bonding avoids agglomeration and crosslinking, so that the photochromic response performance, the mechanical performance and the stability of the compound are synergistically improved. Preferably, the content of the perovskite quantum dot reaction matrix in the compound is 5-15 wt%, more preferably 5-10 wt%, and even more preferably 5wt%. Preferably, the acrylic monomer is selected from one or more of butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, methyl acrylate and methyl methacrylate. In the present invention, the molar ratio of the styrene monomer to the itaconic acid monomer is preferably 1 (0.2-0.3), more preferably 1:0.2 or 1:0.25 or 1:0.3, and still more preferably 1:0.2. Preferably, the molar ratio of the acrylic monomer to the acrylic monomer is (1-5): 1, more preferably 2:1. Preferably, the molar ratio of perovskite quantum dot