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Hypoxic microsphere with ultraviolet shielding shell structure and preparation method of hypoxic microsphere

A technology of shell structure and external shielding is applied in the field of hypoxic microspheres with ultraviolet shielding shell structure and its preparation, which can solve the problems of not reaching photo-oxidation reaction, unsolving dissolved oxygen, etc. Effect

Active Publication Date: 2022-08-09
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantage of this method is that it only plays a role in blocking the external O 2 , while for the dissolved oxygen existing in the system itself and a small amount of O diffused into the interior 2 There is no corresponding solution, so organic dyes are still in the 2 molecular environment
[0007] The problem existing in the above-mentioned technology is: the O that adopts dense macromolecular matrix or inorganic hard shell layer as dyestuff 2 The barrier layer can block the external O to a certain extent. 2 Diffusion, but did not solve the dissolved oxygen existing in the system, so it did not achieve complete barrier O 2 Photo-oxidation reaction in contact with dye molecules

Method used

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  • Hypoxic microsphere with ultraviolet shielding shell structure and preparation method of hypoxic microsphere
  • Hypoxic microsphere with ultraviolet shielding shell structure and preparation method of hypoxic microsphere
  • Hypoxic microsphere with ultraviolet shielding shell structure and preparation method of hypoxic microsphere

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Experimental program
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Effect test

Embodiment 1

[0028]1. The organic dye selected is commercially available ZnPc, accurately weigh 0.15g ZnPc and dissolve it in 10g MXDA, then add 0.15g hydrotalcite, 0.15g nano-magnesium silicide with a size distribution of 20-50nm and 0.15g TEMP, and ultrasonically disperse evenly for backup. use. Add 5g of emulsifier OP-10 to 100ml of deionized water, stir evenly at 80°C, add 5g of epoxy resin monomer DGEBA, emulsify in a homogenizer for 10min to form an oil-in-water emulsion, and keep stirring in a water bath at 80°C. 1.0 g of the ZnPc-containing curing agent MXDA prepared above was added to the emulsification system, and cured at 80°C for 3 hours to obtain epoxy resin microspheres ZnPc / EP containing ZnPc dyes. The prepared ZnPc / Ep microspheres had an average particle size of 350 μm.

[0029] 2. Add the prepared ZnPc / EP microspheres into the round-bottomed flask, then add 3 ml of deionized water, 3.6 ml of ammonia water, and 60 ml of ethanol, and keep the water bath at 60°C. Dissolve 1...

Embodiment 2

[0031] 1. The organic dye selected is commercially available ZnPc, accurately weigh 0.05g ZnPc and dissolve it in 10g MXDA, then add 0.15g montmorillonite, 0.15g nano-magnesium silicide with a size of 20-50nm and 0.15g DPBF, and ultrasonically disperse evenly for backup. use. Add 4g of emulsifier OP-10 to 100ml of deionized water, stir evenly at 85°C, add 3g of epoxy resin monomer DGEBA, emulsify in a homogenizer for 10min to form an oil-in-water emulsion, and keep stirring in a water bath at 85°C. 0.6 g of the ZnPc-containing curing agent MXDA prepared above was added to the emulsification system, and cured at 85 °C for 2 h to obtain epoxy resin microspheres ZnPc / EP containing ZnPc dye.

[0032] 2. Add the prepared ZnPc / EP microspheres into the round-bottomed flask, then add 3 ml of deionized water, 3.6 ml of ammonia water, and 60 ml of ethanol, and keep the water bath at 60°C. Dissolve 0.5g TEOS in 20ml absolute ethanol, then add 45mg TiO 2 , ultrasonically dispersed unifo...

Embodiment 3

[0036] 1. The organic dye selected is commercially available ZnPc. Accurately weigh 0.24g of ZnPc and dissolve it in 10g of DETA, then add 0.2g of hydrotalcite and 0.2g of nano-magnesium silicide with a size of 20-50nm, and ultrasonically disperse it uniformly for later use. Add 7g of emulsifier OP-10 to 100ml of deionized water, stir evenly at 70°C, add 8g of epoxy resin monomer DGEBA, emulsify in a homogenizer for 10min to form an oil-in-water emulsion, and keep stirring in a water bath at 70°C. 1.6 g of the ZnPc-containing curing agent DETA prepared above was added to the emulsification system, and cured at 70°C for 5 hours to obtain epoxy resin microspheres ZnPc / EP containing ZnPc dyes. The prepared ZnPc / Ep microspheres had an average particle size of 415 μm.

[0037] 2. Add the prepared ZnPc / EP microspheres into the round-bottomed flask, then add 3 ml of deionized water, 3.6 ml of ammonia water, and 60 ml of ethanol, and keep the water bath at 60°C. 2g of TEOS was dissol...

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Abstract

The invention discloses a hypoxic microsphere with an ultraviolet shielding shell structure and a preparation method of the hypoxic microsphere. A shell layer of the hypoxic microsphere is composed of SiO2 and an ultraviolet shielding functional substance in a ratio of 1: (0.05-0.1), the thickness of the shell layer is 10-30 nm, and the hypoxic microsphere has dual functions of visible light transparency and oxygen isolation. The hypoxic microsphere core is composed of a resin matrix, a hypoxic functional filler and dye molecules, the diameter of the core is 200-500 [mu] m, and the hypoxic functional filler is composed of one or more of an oxygen barrier, an oxygen consumption agent and a singlet oxygen trapping agent; the total content of the hypoxic functional filler is 0.1-1% of the mass of the resin matrix, and the mass of the dye molecules is 0.1-0.5% of the mass of the resin matrix. The hypoxic microsphere with the ultraviolet shielding shell structure can provide an ultraviolet radiation filtering hypoxic environment for organic dye, and the stability of the organic dye under sunlight irradiation can be effectively improved.

Description

technical field [0001] The invention belongs to the field of organic dye stabilization, in particular to a hypoxic microsphere with an ultraviolet shielding shell structure and a preparation method thereof. Background technique [0002] Organic dyes are widely used in industrial markets due to their rich colors and high color rendering, and their annual output accounts for about a quarter of the output of dyes. The photostability of organic dyes is a key factor determining their market application. The photodegradation process mainly includes: the dye is excited by light to transition to the excited triplet state, the dye in the triplet state and the ground state O 2 The reaction generates strong oxidizing singlet oxygen, and the singlet oxygen attacks the dye to make it oxidatively decompose. O 2 and the presence of UV light is the main cause of induced photodegradation of dyes by physically isolating external O 2 It can effectively improve the photostability of organic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/02C09B67/08C09B47/04
CPCC09B67/0007C09B67/0071C09B67/0097C09B47/04
Inventor 陆春华方亮易子琳倪亚茹许仲梓
Owner NANJING UNIV OF TECH
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