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Oil-solubility carbon quantum dots (OCDs), PMMA-coated OOCDs, and preparation method and application thereof

A carbon quantum dot, oil-soluble technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, nanotechnology, etc., can solve problems such as no further development and application, and achieve excellent optical transparency, good dispersion Sexual and luminous performance, small size effect

Inactive Publication Date: 2017-07-04
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the general reports only focus on its synthesis, and its application in other aspects is not further developed, especially in slowing down the aging of polymers.

Method used

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  • Oil-solubility carbon quantum dots (OCDs), PMMA-coated OOCDs, and preparation method and application thereof
  • Oil-solubility carbon quantum dots (OCDs), PMMA-coated OOCDs, and preparation method and application thereof
  • Oil-solubility carbon quantum dots (OCDs), PMMA-coated OOCDs, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Synthesis of OOCDs

[0032] As shown below, methyl methacrylate (MMA) was used as a single precursor to synthesize oil-soluble carbon quantum dots (OOCDs) in one step: 5.30 ml of methyl methacrylate (MMA) and 2.97 ml of dodecylamine (DDA ), and 2ml of NH 3 ·H 2 O was added to 20ml of toluene respectively, sealed in a 100ml stainless steel autoclave with a polytetrafluoroethylene liner, and reacted at 180°C for 2 hours respectively. From the appearance of the final reaction, there are oil-soluble nanoparticles and oil-soluble residues.

[0033] The product was purified to remove dodecylamine (DDA) and methyl methacrylate (MMA) residues. Therefore, each product was washed with 20ml of water and 20ml of ethanol, and the obtained emulsion was centrifuged at 10000r / min with a centrifuge to separate and remove the lower layer solution. This process was repeated twice. Then add 20ml of pure water to wash twice, and the obtained organic product is further dialyzed in dia...

Embodiment 2

[0037] 1. Synthesis of OOCDs

[0038]Oil-soluble carbon quantum dots (OOCDs) were synthesized in one step using methyl methacrylate (MMA) as a single precursor as follows: 5.30 ml of methyl methacrylate (MMA) and 5.94 ml of dodecylamine (DDA ), and 2 ml of NH 3 ·H 2 O was added to 20 ml of toluene, sealed in a 100 ml stainless steel autoclave lined with polytetrafluoroethylene, and then reacted at 200 °C for 4 hours. From the appearance of the final reaction, there are oil-soluble nanoparticles and oil-soluble residues.

[0039] The product was purified to remove dodecylamine (DDA) and methyl methacrylate (MMA) residues. Therefore, each product was washed with 20 ml of water and 20 ml of ethanol, and the obtained emulsion was centrifuged with a centrifuge at 10,000 r / min to separate and remove the lower layer solution. This process was repeated twice. 20 ml of pure water was added to wash twice, and the obtained organic product was further dialyzed in a dialysis tube for 2...

Embodiment 3

[0043] 1. Synthesis of OOCDs

[0044] Oil-soluble carbon quantum dots (OOCDs) were synthesized in one step using methyl methacrylate (MMA) as a single precursor as follows: 5.30 ml of methyl methacrylate (MMA) and 11.88 ml of dodecylamine (DDA ), and 4 ml of NH 3 ·H 2 O was added to 20 ml of toluene, sealed in a 100 ml stainless steel autoclave lined with polytetrafluoroethylene, and then reacted at 220 °C for 6 hours. From the appearance of the final reaction, there are oil-soluble nanoparticles and oil-soluble residues.

[0045] The product was purified to remove dodecylamine (DDA) and methyl methacrylate (MMA) residues. Therefore, each product was washed with 20 ml of water and 20 ml of ethanol, and the obtained emulsion was centrifuged with a centrifuge at 10,000 r / min to separate and remove the lower layer solution. This process was repeated twice. 20 ml of pure water was added to wash twice, and the obtained organic product was further dialyzed in a dialysis tube for...

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Abstract

The invention relates to oil solubility carbon quantum dots (OCDs), PMMA-coated OOCDs, and a preparation method and an application thereof. The particle size of the oil solubility carbon quantum dots is 1-10 nm, and the surface non-saturated carbon bond contains 20-50%. The oil solubility carbon quantum dots synthesized by the method has good dispersibility and luminescence performance, can be taken as an age-proof probe of PMMA, a composite material obtained by in-situ polymerization of the oil solubility carbon quantum dots and the PMMA has excellent optical transparency (the transmittance can reach as high as more than 85%), the anti-ultraviolet aging performance of the PMMA can be increased by more than 10 times, the method solves the problems that the application of carbon quantum dots is existed in all-solid-state illumination in the prior art, and solves the problem that the PMMA cannot be widely used due to poor aging performance.

Description

technical field [0001] The invention relates to an oil-soluble carbon quantum dot (OCDs), OCDs@PMMA, its preparation method and its application. Background technique [0002] Polymer composites can make up for some physical or chemical defects of polymers, and are widely used in real life. Its conventional synthesis route is to add a high concentration of filler modifiers to explore its potential properties. Recently, it has been reported that by adding lower concentrations of fillers, such as the use of novel nanostructured fillers during polymerization, especially carbon nanomaterials such as fullerenes, carbon nanotubes, graphene, and nanodiamonds, the as-prepared Compared with the original polymer, the polymer has advantages in oxidation resistance, thermal stability and electrical conductivity. Aging phenomenon is ubiquitous in various polymers and is recognized as a detrimental factor in practical applications. Therefore, many studies have been carried out to slow d...

Claims

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Application Information

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IPC IPC(8): C09K11/06C09K11/02B82Y20/00B82Y30/00B82Y40/00C08F292/00C08F220/14
CPCB82Y20/00B82Y30/00B82Y40/00C08F292/00C09K11/02C09K11/06C08F220/14
Inventor 张志军陈向阳杨雪纯赵景泰
Owner SHANGHAI UNIV
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