A method for preparing conductive polystyrene particles with core-shell structure by using waste polystyrene

A technology of polystyrene particles and waste polystyrene, which is applied in the field of environmental protection, can solve the problems of high percolation threshold value of conductive polystyrene materials, decreased mechanical properties and processing performance, large filling amount of conductive fillers, etc., and can prevent electromagnetic waves. and radio frequency interference, low preparation cost and high conductivity

Active Publication Date: 2020-12-22
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing conductive polystyrene particles with a core-shell structure by using waste polystyrene to address the deficiencies in the prior art and to effectively utilize waste polystyrene, that is, waste polystyrene is used as the core, and the shell layer is used The conductive method solves the problems of high percolation threshold of conductive polystyrene materials prepared by the prior art, large filling amount of conductive fillers, decline in mechanical properties and processing properties, and at the same time effectively uses waste polystyrene to solve its white pollution problem

Method used

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  • A method for preparing conductive polystyrene particles with core-shell structure by using waste polystyrene
  • A method for preparing conductive polystyrene particles with core-shell structure by using waste polystyrene
  • A method for preparing conductive polystyrene particles with core-shell structure by using waste polystyrene

Examples

Experimental program
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Effect test

Embodiment 1

[0045]In a three-neck flask with a capacity of 1 liter, a stirring paddle is installed in the middle port, a condenser is installed in one side port, and condensed water is introduced. Add 300ml of absolute ethanol and 160ml of dichloromethane from the other side port, and add 40g of graphene under stirring to obtain a mixed system of dichloromethane and ethanol of graphene, and stir evenly. Add 200 g of polystyrene particles with a diameter of 1 mm, prepared by functionalized remodeling of waste polystyrene, stir for 2 hours, add 200 ml of absolute ethanol, filter and dry to obtain black conductive polystyrene particles.

Embodiment 2

[0047] In a 100-liter reactor, open the cold water inlet valve and outlet valve of the reflux condenser, add 33L methanol and 20L benzene from the feed pipeline, turn on the stirrer switch, adjust the stirring speed to 90rpm, and add 5kg 1000 mesh graphite powder from the feed inlet , continue to stir until uniform, add 40kg 1.0-1.2mm expandable polystyrene particles from the feed port, prepared by the method of functional remodeling of waste polystyrene, add 15L methanol after stirring for 2 hours, filter out and dry to obtain Black graphite expandable polystyrene conductive particles.

Embodiment 3

[0049] In a 1-liter three-necked flask, a stirring paddle is installed in the middle port, a condenser is installed in the side port, and condensed water is introduced. Add 200ml of chloroform and 240ml of methanol from the other side port, stir evenly, add 30g of 1500 mesh conductive carbon black and continue stirring to obtain a mixed solution of chloroform and methanol of conductive carbon black. Add 100g of polystyrene particles with a diameter of 1 mm from the other side port, prepared by the method of functionalized remodeling of waste polystyrene, stir for 2 hours, add 200ml of methanol, and filter out black polystyrene particles.

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Abstract

The invention relates to a method for preparing conductive polystyrene particles with a core-shell structure by utilizing waste polystyrene. According to the method, polystyrene particles prepared byutilizing a waste polystyrene functionalized remodeling method are added into a mixed solvent containing a conductive material, stirring is carried out, so that the surfaces of the polystyrene particles are swollen, and the conductive material is allowed to enter the swollen network space of the surfaces of the polystyrene particles, and the mixed solvent is removed so as to obtain the polystyreneparticles with conductive shells. The polystyrene with a conductive shell prepared by using the preparation method for the conductive polystyrene particles with the core-shell structure provided by the invention has the following advantages: the process is simple; the conductive material has small usage amount, high conductivity and low cost; and the problems of the conductive polystyrene on complicated preparation process, poor mechanical properties and high production cost can be effectively solved. Meanwhile, the preparation method provided by the invention effectively utilizes the waste polystyrene, so the problem of environmental pollution caused by the waste polystyrene is solved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for preparing conductive polystyrene particles with a core-shell structure by using waste polystyrene. Background technique [0002] As a general-purpose thermoplastic resin, polystyrene has good performance and processability, and has been widely used in various fields of people's production and life. For example, expandable polystyrene is mostly used for heat preservation, heat insulation, shockproof and packaging. Waste expandable polystyrene in my country is an important source of white pollution, and it is in urgent need of recycling and high-value reuse. [0003] Polystyrene is an electrical insulator and is flammable. It is easy to generate static electricity during production and use. The static electricity will cause various hazards, such as fire or breakdown of electronic circuits. The rapid development of the electronic industry a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L25/06C08K3/04C08J9/18
CPCC08J9/18C08J2325/06C08K3/04C08K2201/001C08K3/042C08L25/06
Inventor 李俊锋杨家琪余彦霞李美玲
Owner JILIN UNIV
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