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Inorganic nano-particle surface grafted photoinitiator and application thereof

A technology of inorganic nanoparticles and photoinitiators, which is applied in the field of photocurable composite materials, can solve the problems of harsh reaction conditions of photoinitiators, uncommon experimental methods, and difficult reactions, and achieve excellent ultraviolet absorption capacity, enhanced mechanical properties, and easy operation. easy effect

Active Publication Date: 2018-12-07
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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  • Inorganic nano-particle surface grafted photoinitiator and application thereof
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  • Inorganic nano-particle surface grafted photoinitiator and application thereof

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 shake for 30 min, and transfer to the oil 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 condenser ...

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-neck flask, ultrasonically shake for 30 min, and transfer to the oil 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 thermometer, ...

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 of 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-aminopropyltri(methoxyl) dropwise after heating up to 70°C Ethoxyethoxy) 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 bath, equipped wit...

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Abstract

The invention discloses an inorganic nano-particle surface grafted photoinitiator and application thereof. The photoinitiator is prepared by the following steps: (S1) dispersing inorganic nano-particles into an ethanol water solution, adding a silane coupling agent to react, so as to obtain surface silane coupling agent modified inorganic nano-particles; and (S2) dispersing the surface silane coupling agent modified inorganic nano-particles in the step (S1) into a good solvent of the photoinitiator, and adding the photoinitiator to react, so as to obtain the inorganic nano-particle surface grafted photoinitiator. The photoinitiator has the beneficial effects that an intermediate of the photoinitiator is non-toxic and environment-friendly, the reaction conditions are mild, the operation issimple and convenient, the silane coupling agent can be taken as a bridge of a thioxanthone photoinitiator and the nano-particles, the universality is strong, and the photoinitiator has excellent ultraviolet absorbing capacity when serving as the photoinitiator and is capable of effectively improving the mechanical properties, particularly the bending strength of photocuring materials when servingas filler.

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 Applications(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
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