Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of self-repairing carbon nanotube-cationic waterborne polyurethane electromagnetic shielding composite material

An electromagnetic shielding material, water-based polyurethane technology, applied in the field of preparation of polymer-based functional composite materials, can solve problems such as performance degradation and failure, and achieve the effects of improving use stability, reducing life cycle costs, and being environmentally friendly

Pending Publication Date: 2020-11-13
JIANGSU JICUI ADVANCED POLYMER MATERIAL RES INST CO LTD +1
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of performance degradation or failure of the CPCs-based electromagnetic shielding composite material due to mechanical damage, thereby providing a method for preparing a self-repairing electromagnetic shielding composite material with a simple process and environmental friendliness

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of self-repairing carbon nanotube-cationic waterborne polyurethane electromagnetic shielding composite material
  • Preparation method of self-repairing carbon nanotube-cationic waterborne polyurethane electromagnetic shielding composite material
  • Preparation method of self-repairing carbon nanotube-cationic waterborne polyurethane electromagnetic shielding composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0066] The process steps adopt:

[0067] (1) Uniformly disperse carbon nanotubes (CNT) into water with a cell ultrasonic breaker to prepare a CNT aqueous dispersion;

[0068] (2) Blend the self-healing cationic waterborne polyurethane (CWPUDA) emulsion and the CNT aqueous dispersion in a certain weight ratio (see Table 1 for the specific formula), and use the electrostatic adsorption interaction between ions with different charges to coat the CNT on the On the surface of CWPUDA particles, suction filter and dry.

[0069] (3) The composite particles obtained in step (2) were hot-pressed at 120°C for 10 min to prepare the self-healing electromagnetic shielding composite material.

[0070] Wherein, the concrete preparation process of described CWPUDA emulsion is:

[0071] (A) Add 4.92 g of furfurylamine and 5.99 g of hydroxymethyldioxolanone into a flask, heat to 60°C with stirring, and react at constant temperature for 3 h to prepare diols with furan groups.

[0072] (B) Add ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a self-repairing carbon nanotube / cationic waterborne polyurethane electromagnetic shielding composite material. The preparation method comprises the following steps: firstly, preparing a carbon nanotube (CNT) aqueous dispersion; then adding synthesized self-repairing cationic waterborne polyurethane (CWPUDA) emulsion into the CNT aqueous dispersion;coating the surfaces of the CWPUDA particles with CNT by utilizing electrostatic adsorption interaction between ions with different charges, and carrying out suction filtration, drying and hot pressing to obtain the self-repairing CNT / CWPUDA electromagnetic shielding composite material. The composite material has an excellent self-repairing performance, electromagnetic shielding performance and mechanical performance, self-repairing can be achieved under a heating condition, and the original electromagnetic shielding performance of the composite material is recovered. The composite material ismild in self-repairing condition and high in repairing efficiency, and has great significance in improving the use stability of an electromagnetic shielding material.

Description

technical field [0001] The invention belongs to the field of preparation technology of polymer-based functional composite materials, and in particular relates to a preparation method of a self-repairing carbon nanotube (CNT) / cationic waterborne polyurethane (CWPUDA) electromagnetic shielding composite material. Background technique [0002] With the rapid development of the modern electronic industry, the problem of electromagnetic radiation is becoming more and more serious. In order to solve the adverse effects of electromagnetic radiation on human health and various electronic equipment, the development of electromagnetic shielding materials has attracted extensive attention from scholars at home and abroad. Compared with metal electromagnetic shielding materials, conductive polymer composites (CPCs) are widely used in the field of electromagnetic shielding due to their light weight, easy processing, and corrosion resistance (He Hezhi, et al. plastic industry 2008, 36,...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08L75/04C08L75/08C08K3/04C08G18/66C08G18/48C08G18/32C08G18/83
CPCC08K3/041C08G18/6674C08G18/6688C08G18/4854C08G18/3218C08G18/833C08L75/08C08L75/04
Inventor 鄢定祥王婷李忠明雷军徐晶晶张力
Owner JIANGSU JICUI ADVANCED POLYMER MATERIAL RES INST CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com