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A kind of inorganic nanoparticle surface graft type photoinitiator and its application

A technology of inorganic nanoparticles and photoinitiators, applied in the field of photocurable composite materials, can solve the problems of harsh reaction conditions of photoinitiators, uncommon experimental methods, difficult reactions, etc. easy effect

Active Publication Date: 2021-03-12
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects and deficiencies of existing photoinitiators, such as harsh reaction conditions, difficult reaction, toxicity, and unsuitable experimental methods, and provide a kind of inorganic nanoparticle surface grafted photoinitiator, which has a simple and environmentally friendly preparation method And universal, it can be added into the photocuring system as a nanofiller and photoinitiator, which can not only initiate curing but also improve the mechanical properties of the product, with better migration resistance

Method used

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  • A kind of inorganic nanoparticle surface graft type photoinitiator and its application
  • A kind of inorganic nanoparticle surface graft type photoinitiator and its application
  • A kind of inorganic nanoparticle surface graft type photoinitiator and its application

Examples

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Effect test

Embodiment 1

[0041] A kind of inorganic nanoparticle surface graft type photoinitiator, structural formula is as follows:

[0042]

[0043] Prepared by the following method:

[0044] S1. Surface modification of nano-silica with silane coupling agent KH550: Add 240 mL of absolute ethanol, 60 mL of deionized water and 5 g of nano-silica to a 500 mL three-neck flask, ultrasonically oscillate for 30 min and move to an oil bath Equipped with a mechanical stirring paddle, a thermometer, and a condenser tube, add 5 g of KH550 dropwise after heating up to 60 °C, and react for 6 h. After the reaction, through centrifugation—washing—recentrifugation—vacuum drying—grinding, KH550 surface-modified nano-SiO 2 powder;

[0045] S2. Modified nano-SiO 2 Grafting photoinitiator CTX: Add 300 mL xylene and 5 g of the modified nano-SiO to a 500 mL three-neck flask 2 , ultrasonically oscillated for 30 min, and moved to an oil bath, equipped with a mechanical stirring paddle, a thermometer, and a condense...

Embodiment 2

[0053] A kind of inorganic nanoparticle surface graft type photoinitiator, structural formula is as follows:

[0054]

[0055] Prepared by the following method:

[0056] S1. Surface modification of nano-silica with silane coupling agent KH560: Add 240 mL of absolute ethanol, 60 mL of deionized water and 5 g of nano-silica to a 500 mL three-necked flask, ultrasonically oscillate for 30 min and move to an oil bath Equipped with a mechanical stirring paddle, a thermometer, and a condenser tube, add 5 g of KH560 dropwise after heating up to 60 °C, and react for 6 h. After the reaction, through centrifugation—washing—recentrifugation—vacuum drying—grinding, KH560 surface-modified nano-SiO 2 powder;

[0057] S2. Modified nano-SiO 2 Grafting photoinitiator CTX: Add 300 mL xylene and 5 g of the above-mentioned modified nano-SiO to a 500 mL three-neck flask 2 , ultrasonically oscillated for 30 min, and moved to an oil bath, equipped with a mechanical stirring paddle, a thermomet...

Embodiment 3

[0059] A kind of inorganic nano particle surface graft type photoinitiator, is prepared by following method:

[0060] S1. Surface modification of nano-silica by silane coupling agent 3-aminopropyltris(methoxyethoxyethoxy)silane: add 200 mL of absolute ethanol and 80 mL of dehydrated Ionized water and 3 g nano-silica, ultrasonically oscillated for 50 min, moved to an oil bath, equipped with a mechanical stirring paddle, a thermometer, and a condenser tube, and added 6 g of 3-aminopropyl tris(methoxyethyl) dropwise after the temperature was raised to 70°C. Oxyethoxy) silane, reaction 4h. After the reaction, through centrifugation—washing—recentrifugation—vacuum drying—grinding, 3-aminopropyltris(methoxyethoxyethoxy)silane surface-modified nano-SiO 2 powder;

[0061] S2. Modified nano-SiO 2 Grafting photoinitiator CTX: Add 200 mL xylene and 3 g of the above-mentioned modified nano-SiO to a 500 mL three-neck flask 2 , ultrasonically oscillated for 40 min, and moved to an oil b...

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Abstract

The invention discloses a photoinitiator grafted on the surface of inorganic nanoparticles and an application thereof. The grafted photoinitiator on the surface of inorganic nanoparticles is prepared by the following method: S1. dispersing the inorganic nanoparticles in an aqueous ethanol solution, adding a silane coupling agent, and reacting to obtain surface silane coupling agent-modified inorganic nanoparticles; S2 Disperse the surface silane coupling agent-modified inorganic nanoparticles in S1 in a good solvent for the photoinitiator, add the photoinitiator, and react to obtain the inorganic nanoparticle surface-grafted photoinitiator. The photoinitiator intermediate of the present invention is non-toxic and environmentally friendly, has mild reaction conditions, and is easy to operate. The silane coupling agent can be used as a bridge between thioxanthone photoinitiators and nanoparticles, and has strong versatility. As a photoinitiator, it has excellent The ultraviolet absorbing ability, as a filler, can effectively enhance the mechanical properties of light-cured materials, especially in the enhancement of bending strength.

Description

technical field [0001] The invention relates to the field of photocurable composite materials, more specifically, to a photoinitiator grafted on the surface of inorganic nanoparticles and its application. Background technique [0002] Photocuring technology has the characteristics of "5E": efficient (Efficient), wide adaptability (Enabling), economical (Economical), energy saving (Energy Saving) and environmental friendly (Environmental Friendly), so it is widely used in various industrial applications, such as protective coatings, Printing inks, adhesives, etc. Photoinitiator is a key component of photocurable materials, which plays a decisive role in the photocuring speed of photocurable materials. A photoinitiator is a substance that can absorb radiation energy, produce photochemical changes after being excited, and produce active intermediates (free radicals or cations) with the ability to initiate polymerization. At present, photocuring technology uses more photoiniti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F2/48C08F299/02
CPCC08F2/48C08F299/024
Inventor 李晓文陈丽娟刘晓暄
Owner GUANGDONG UNIV OF TECH