Carbon quantum dot-polymer composite material, and preparation method and application thereof

A technology of carbon quantum dots and composite materials, which is applied in the field of carbon quantum dot-polymer composite materials and its preparation and application, and can solve problems such as poor dispersion, unsatisfactory flame retardant effect, and complicated process

Active Publication Date: 2020-02-21
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It mainly discloses the flame retardant application of carbon quantum dots in polymer resins, overcomes the problems of toxic gas emissions in the combustion process of traditional brominate...

Method used

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  • Carbon quantum dot-polymer composite material, and preparation method and application thereof
  • Carbon quantum dot-polymer composite material, and preparation method and application thereof
  • Carbon quantum dot-polymer composite material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] With carbon quantum dot powder (the TEM figure of carbon quantum dot sees figure 1 ) mixed with polyurethane evenly, then the mixture is extruded by a screw extruder and pelletized. Among them, carbon quantum dots and polyurethane are mixed at a mass ratio of 1:4, the melting temperature of the screw extruder is set at 190°C, and the speed of the main machine is 25r / min. The flame retardant properties of the extruded masterbatch were then tested. figure 2 It is the physical picture of the masterbatch extruded and pelletized by the screw extruder. The masterbatch is uniform black, indicating that the carbon quantum dots are uniformly dispersed in the polymer. image 3 It is the heat release rate curve of the composite material mixed with carbon quantum dots and polyurethane material at a mass ratio of 1:4. Table 1 is other flame retardant test parameters. The heat release ability decreased by 57.5%, the peak heat release rate decreased by 65.8%, the total heat relea...

Embodiment 2

[0026] The carbon quantum dot powder is uniformly mixed with polyvinylpyrrolidone (PVP) particles, and then the mixture is extruded through a screw extruder and pelletized. Among them, carbon quantum dots and polyurethane are mixed at a mass ratio of 1:4, the melting temperature of the screw extruder is set at 140°C, and the speed of the main machine is 30r / min. The flame retardant properties of the extruded masterbatch were then tested. The heat release ability decreased by 50.6%, the peak heat release rate decreased by 62.8%, the total heat release decreased by 58.8%, and the maximum decomposition temperature decreased by 2.3°C. Figure 4 It is the flame retardant effect diagram of pure polymer and carbon quantum dots / polyvinylpyrrolidone composite. in, Figure 4 Middle a-d are photos of pure polyvinylpyrrolidone when the burning time is 1s, 2s, 3s, 4s; Figure 4 Middle e-h are photos of carbon quantum dots and polyvinylpyrrolidone composites when the burning time is 1s, ...

Embodiment 3

[0028] The carbon quantum dot powder is uniformly mixed with nylon 6 (PA6) resin, and then the mixture is extruded through a screw extruder and pelletized. Among them, carbon quantum dots and nylon 6 are mixed at a mass ratio of 1:9, the melting temperature of the screw extruder is set at 260°C, and the speed of the main machine is 30r / min. The flame retardant properties of the extruded masterbatch were then tested. The heat release ability decreased by 21.5%, the peak heat release rate decreased by 28.3%, the total heat release decreased by 25.6%, and the maximum decomposition temperature decreased by 0.6°C.

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Abstract

The invention discloses a carbon quantum dot-polymer resin composite material, and a preparation method and an application thereof. The carbon quantum dot-polymer resin composite material is a composite material prepared from carbon quantum dots and a polymer resin material through melt blending, wherein a mass ratio of the carbon quantum dots to the polymer resin material is 1:(2.3-10). The invention also discloses an application of the carbon quantum dot-polymer resin composite material in different fields. The carbon quantum dot-polymer resin composite material has the advantages of simplicity in operation, mild conditions, and easiness in large-scale preparation. The flame retardant application of the carbon quantum dots as a green halogen-free flame retardant in polymers is disclosedfor the first time. The carbon quantum dot-polymer resin composite material has the advantages of good flame retardant effect, greenness, environmental protection and the like, and provides a new ideafor the preparation of brand new environmentally-friendly halogen-free flame retardants.

Description

technical field [0001] The present invention relates to a kind of carbon quantum dot-polymer composite material and its preparation and application, and more specifically relates to the use of carbon quantum dots to form a dense coke layer on the surface of the polymer during the combustion process of the polymer so as to prevent the flame and the polymer from burning. The transmission of heat and flammable volatiles between them exhibits flame retardant properties. Background technique [0002] Flame retardants can endow polymer materials with flame retardant characteristics, so that they can be safely used in the electronics and electrical industries, such as sockets, relays and other electronic components. In addition, with the wide application of polymer materials in building materials, flame retardant polymer materials are the key to ensuring the safety of people's lives and properties. Therefore, it is particularly important to develop effective flame retardants. At ...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08L39/06C08L77/02C08L69/00C08L23/12C08L33/12C08L77/06C08K3/04
CPCC08K3/04C08L2201/02C08L75/04C08L39/06C08L77/02C08L69/00C08L23/12C08L33/12C08L77/06
Inventor 陈苏成瑞刘畅王彩凤
Owner NANJING UNIV OF TECH
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