A kind of carbon quantum dot-polymer composite material and its preparation and application

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 complex process, poor dispersion, and unsatisfactory flame retardant effect

Active Publication Date: 2021-12-24
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 brominated flame retardants, and solves the dispersion of carbon-based flame retardants such as carbon nanotubes in polymers. Poor performance, unsatisfactory flame retardant effect and complicated process

Method used

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  • A kind of carbon quantum dot-polymer composite material and its preparation and application
  • A kind of carbon quantum dot-polymer composite material and its preparation and application
  • A kind of carbon quantum dot-polymer composite material and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The carbon powder quantum dots (QDs carbon TEM see FIG. figure 1 ) Mixed with the polyurethane, and then the mixture was extruded by a screw extruder and pelletized. Wherein the carbon polyurethane quantum dots 1: 4 ratio by mass were mixed, melt-screw extruder set to 190 deg.] C temperature, host speed 25r / min. Subsequently extruded masterbatch of flame retardant performance test. figure 2 Said screw extruder and pelletizing the masterbatch physical FIG. Uniform black masterbatch, quantum dots indicate the carbon uniformly dispersed in the polymer. image 3 Carbon quantum dots polyurethane material according to 1: 4 by mass mixed graph of heat release rate of the composite ratio. Table 1 flame test for other parameters. Heat release ability decreased by 57.5%, the peak heat release rate decreased by 65.8%, the total heat release decreased 61.3%, the maximum decomposition temperature dropped 1.7 ℃.

[0022] Table 1 Carbon quantum dot - Polyurethane flame retardant properti...

Embodiment 2

[0026] The carbon powder and the quantum dots polyvinyl pyrrolidone (PVP) particles are mixed uniformly, then the mixture was extruded by a screw extruder and pelletized. Wherein the carbon polyurethane quantum dots 1: 4 ratio by mass were mixed, melt-screw extruder set to 140 deg.] C temperature, host speed 30r / min. Subsequently extruded masterbatch of flame retardant performance test. Heat release ability decreased by 50.6%, the peak heat release rate decreased by 62.8%, the total heat release decreased 58.8%, the maximum decomposition temperature decreased 2.3 ℃. Figure 4 Pure polymer and carbon quantum dot / polyvinylpyrrolidone FIG composite flame-retardant effect. in, Figure 4 A-d in a pure polyvinyl pyrrolidone burning time of 1s, 2s, 3s, 4s when the picture; Figure 4 E-h of the quantum dots is a carbon composite polyvinylpyrrolidone burn time of 1s, 2s, 3s, 4s when the photograph. As can be seen from the figure, the quantum dots polyvinylpyrrolidone carbon composites exh...

Embodiment 3

[0028] The carbon powder and the quantum dots nylon 6 (PA6) resin is mixed, then the mixture was extruded by a screw extruder and pelletized. Wherein the quantum dots nylon 6 carbon by 1: 9 mass ratio of mixing, screw extruder melt temperature is set to 260 ℃, host speed 30r / min. Subsequently extruded masterbatch of flame retardant performance test. Heat release ability decreased by 21.5%, the peak heat release rate decreased by 28.3%, the total heat release decreased by 25.6%, the maximum decomposition temperature dropped 0.6 ℃.

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Abstract

The invention discloses a carbon quantum dot-polymer resin composite material as well as its preparation and application. Carbon quantum dot-polymer resin composite material is a composite material prepared by melt blending carbon quantum dots and polymer resin materials; wherein the mass ratio of carbon quantum dots to polymer resin materials is 1:(2.3~10). The invention discloses the application requirements of carbon quantum dot-polymer resin composite materials in different fields, and has the advantages of simple operation, mild conditions, and easy large-scale preparation; it discloses carbon quantum dots as a green halogen-free flame retardant for the first time The flame retardant application in polymers has the advantages of good flame retardant effect and environmental protection, and provides a new idea for the preparation of a new environmentally friendly halogen-free flame retardant.

Description

Technical field [0001] The present invention relates to a quantum dot carbon - polymer composites, and preparation and application, and more particularly relates to the use of quantum dots carbon polymer during combustion, coke layer to form a dense polymer surface and the polymer so as to prevent the flame and heat transfer between the combustible volatile ingredients, exhibit flame retardant properties. Background technique [0002] It can impart flame retardant properties of the polymer material, so that it can be safely used in the electronics and electrical industry, such as: socket, relays and other electronic components. In addition, as the polymer material widely used in building materials, flame retardant polymer materials is critical to ensure that people's lives and property safety. Therefore, the development of effective flame retardants is particularly important. Currently, the United States and Europe mainly use halogen-free flame retardants, its strong environmenta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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 TECH UNIV
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