Color polymer conductive bead and preparation method

A technology of polymer beads and polymers, which is applied in the field of colored polymer conductive beads and its preparation, can solve the problems of poor light fastness, reduced mechanical properties, poor compatibility with polymers, etc., and achieve good electrical conductivity and Effects of color, inhibition of secondary growth, and solvent recycling

Active Publication Date: 2019-01-22
WUHAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the above-mentioned existing reports, the first type is to introduce organic dyes by suspension polymerization, but organic dyes are easily soluble in organic solvents, flammable and will decompose when exposed to sunlight. Therefore, organic dyes have poor weather resistance, poor solvent resistance, and poor light fastness And flammable, seriously affect the performance of colored expandable polystyrene beads
The second category is inorganic pigments, which need to be hydrophobically modified and then introduced into the suspension polymerization system. The introduction of inorganic pigments will reduce the mechanical properties to a certain extent
The third category is the use of melt blending technology, which needs to add a variety of additives and additives. The process is complicated. The added conductive additive is inorganic and has poor compatibility with polymers. It can only be achieved when the amount of conductive additive added is large. Inhibit the effect of static electricity, and at the same time greatly reduce the mechanical properties of polymers
[0006] To sum up, the existing reported patents and literature do not solve the problem of dual functions of color and static electricity suppression at the same time, and the existing reports all use inorganic pigments and organic pigments, and do not use the intrinsic color of conductive polymers to solve the problem of polymerization at the same time. Reports on the color of the beads and the suppression of static electricity

Method used

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  • Color polymer conductive bead and preparation method
  • Color polymer conductive bead and preparation method
  • Color polymer conductive bead and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1) Preparation of conductive polymer seed solution

[0048] Dissolve polyaniline in dimethyl sulfoxide to prepare 0.5 mg / mL polyaniline seed solution.

[0049] 2) Confinement and controllable swelling pretreatment of polymer beads

[0050] Weigh 15 g of polystyrene beads and disperse them in 25 mL of polystyrene beads in a mixed solvent of chloroform / ethanol (the volume ratio of chloroform and ethanol is 1:4), mechanically stir for 1 min, and the rotating speed is 40 rpm. Liquid separation to obtain pretreated polystyrene beads.

[0051] 3) Synthesis of colored polymer conductive beads

[0052] Add 20 mL of 0.5 mol / L aqueous hydrochloric acid solution, 3 mmol of aniline monomer and 0.5 mL of 0.5 mg / mL polyaniline seed solution into the reaction flask, then add 15 g of the pretreated polystyrene beads obtained in step 2) to the above system , keep the stirring speed at 60rpm, absorb for 6min, add dropwise an initiator solution consisting of 3mmol ammonium persulfate a...

Embodiment 2

[0054] 1) Preparation of conductive polymer seed solution

[0055] Dissolve polypyrrole in dimethyl sulfoxide to prepare 1 mg / mL polypyrrole seed solution.

[0056] 2) Confinement and controllable swelling pretreatment of polymer beads

[0057] Weigh 20 g of polymethyl methacrylate beads and disperse them in the mixed solvent of dichloromethane / methanol (the volume ratio of dichloromethane and methanol is 1:6) of 30 mL of polymethyl methacrylate beads, mechanically stir for 2 min , with a rotating speed of 50 rpm, and solid-liquid separation to obtain pretreated polymethyl methacrylate beads.

[0058] 3) Synthesis of colored polymer conductive beads

[0059] Add 25 mL of 0.8 mol / L phosphoric acid aqueous solution, 5 mmol of pyrrole monomer and 1 mL of 1 mg / mL polypyrrole seed solution to the reaction flask, then add 20 g of the pretreated polymethyl methacrylate beads obtained in step 2) to the above system In the process, keep the stirring speed at 80rpm, absorb for 12min,...

Embodiment 3

[0061] 1) Preparation of conductive polymer seed solution

[0062] Dissolve polyaniline in dimethyl sulfoxide to prepare 1.2 mg / mL polyaniline seed solution.

[0063] 2) Confinement and controllable swelling pretreatment of polymer beads

[0064] Weigh 25g of expandable polystyrene beads and disperse them in the mixed solvent of toluene / propanol of 40mL of polymer beads (the volume ratio of toluene to propanol is 1:8), mechanically stir for 4min, the rotating speed is 60rpm, solid Liquid separation to obtain pretreated expandable polystyrene beads.

[0065] 3) Synthesis of colored polymer conductive beads

[0066] Add 30mL of 1mol / L perchloric acid aqueous solution, 8mmol aniline monomer and 1mL of 1.2mg / mL polyaniline seed solution to the reaction bottle, then, add 25g of pretreated expandable polystyrene beads obtained in step 2) In the above system, keep the stirring speed at 90rpm, absorb for 15min, add dropwise the initiator solution composed of 8mmol ammonium persulfa...

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Abstract

The present invention discloses a color polymer conductive bead and a preparation method. The method comprises: 1) Preparation of conductive polymer seed liquid; 2) Limited-field controllable swellingpretreatment of polymer beads; 3) Synthesis of color polymer conductive beads. The method can realize controllable swelling of surface layer of the polymer beads by the limited-field controllable swelling pretreatment process of the polymer beads, and then synthesize a series of colored conductive polymer beads with different conductive properties and different colors through the color by synthesis process factors control of the colored polymer conductive beads. The conductive polymer has good compatibility with the polymer beads, and relatively low conductive polymer content can impart better electrical conductivity and colors to the polymer beads without destroying internal structure of the polymer beads, and for foamable polymer beads, the foaming characteristics of the polymer beads are still maintained.

Description

technical field [0001] The invention belongs to the field of colored polymer conductive beads, and more specifically relates to a colored polymer conductive bead and a preparation method thereof. Background technique [0002] Polymer beads such as polystyrene, polymethyl methacrylate, expandable polystyrene and expandable polymethyl methacrylate are widely used in the fields of building materials, packaging, decoration and handicrafts. Common polymer beads are white, but some applications require colored polymer beads. Therefore, a large number of research reports on colored polymer beads have been derived. The Chinese invention patent application with publication number CN 102875713A discloses a color expandable polystyrene resin and a method for preparing color expandable polystyrene resin in one step. The patent application adds organic dyes to styrene monomers , the color expandable polystyrene resin is prepared by one-step suspension polymerization method. In addition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08L79/02C08L33/12C08L79/04C08L25/14C08G73/02C08G73/06
CPCC08G73/0266C08G73/0611C08L25/06C08L25/14C08L33/12C08L79/02C08L79/04
Inventor 闫俊涛冯港英夏佳慧吉茂林王春蕾李建芬柴波范国枝
Owner WUHAN POLYTECHNIC UNIVERSITY
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