Antistatic EVA foamed composite and preparation method thereof

A composite material and antistatic technology, which is applied in the field of polymer composite foam material preparation, can solve the problems of low bond strength between the coating and the polymer matrix resin, easy thermal decomposition, and use, and achieve extensive social and economic benefits and strategic value, beneficial to uniform dispersion, and the effect of innovative research value

Active Publication Date: 2017-02-01
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of adding conductive fillers is mainly to add carbon-based fillers or metal fillers to the polymer matrix. This method often requires the addition of more fillers in order to have better antistatic properties. However, too many inorganic components will inevitably affect the Other properties are affected; in addition, metal fillers have an aging catalytic effect in the matrix, and the cost is also high
The method of adding antistatic agent mainly includes adding ionic antistatic agent and nonionic antistatic agent. Ionic antistatic agent has poor compatibility with resin matrix and is easy to be decomposed by heat; nonionic antistatic agent is easy to absorb water and the dosage is relatively larger
The method of blending with structural conductive polymer materials is mainly to add conjugated polymers such as polyaniline, poly-p-phenylene, polyacetylene, polypyridine, polyquinoline, polythiophene, and poly-p-phenylene sulfide. Molecular molding is difficult, and it is difficult to use alone as an antistatic agent
The coating method is to apply conductive fillers on the surface of polymer material products. The advantage of using the coating method for modification is good antistatic effect and low modification cost; the disadvantage is the adhesion between the coating and the polymer matrix resin. Not high, prone to delamination, resulting in unstable effect

Method used

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  • Antistatic EVA foamed composite and preparation method thereof
  • Antistatic EVA foamed composite and preparation method thereof
  • Antistatic EVA foamed composite and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A method for preparing antistatic EVA foam composite material, the concrete steps are:

[0032] 1) Put the carbon fiber in a Soxhlet extractor and extract it with acetone solution for 12 h to remove the pulp and impurities remaining on the fiber surface, then wash it with deionized water for 5 times, and dry it in a blast drying oven at 80°C for 24 h ;

[0033] 2) Add 1.80 g of carbon fibers treated in step 1) into 1 mol / L hydrochloric acid solution, and stir at room temperature for 0.5 h to obtain a uniformly dispersed carbon fiber suspension;

[0034] 3) Add 0.0385 g of sodium lauryl sulfate to the carbon fiber suspension obtained in step 2), and ultrasonically disperse in a 100 W ultrasonic cleaner for 1 h;

[0035] 4) Add 2.1 mL of aniline monomer to the dispersion obtained in step 3), stir for 0.5 h, and keep the temperature in an ice bath for 0.5 h; put 3.4325 g of ammonium persulfate and 10 mL of deionized water into a constant pressure dropping funnel, Control...

Embodiment 2

[0040] A method for preparing antistatic EVA foam composite material, the concrete steps are:

[0041] 1) Put the carbon fiber in a Soxhlet extractor and extract it with acetone solution for 10 hours to remove the pulp and impurities remaining on the surface of the fiber, then wash it with deionized water 4 times, and dry it in a blast drying oven at 80°C for 24 hours;

[0042] 2) Add 1.80 g of carbon fibers treated in step 1) into 1 mol / L hydrochloric acid solution, and stir at room temperature for 0.5 h to obtain a uniformly dispersed carbon fiber suspension;

[0043] 3) Add 0.0385 g of sodium lauryl sulfate to the carbon fiber suspension obtained in step 2), and ultrasonically disperse in a 100 W ultrasonic cleaner for 1 h;

[0044] 4) Add 4.2 mL of aniline monomer to the dispersion obtained in step 3), stir for 0.5 h, and keep the temperature in an ice bath for 0.5 h; put 6.865 g of ammonium persulfate and 10 mL of deionized water into a constant pressure dropping funnel, ...

Embodiment 3

[0049] A method for preparing antistatic EVA foam composite material, the concrete steps are:

[0050] 1) Put the carbon fiber in a Soxhlet extractor and extract it with acetone solution for 14 h to remove the pulp and impurities remaining on the fiber surface, then wash it with deionized water three times, and dry it in a blast drying oven at 80°C for 24 h;

[0051] 2) Add 1.80 g of carbon fibers treated in step 1) into 2mol / L hydrochloric acid solution, and stir at room temperature for 0.5 h to obtain a uniformly dispersed carbon fiber suspension;

[0052] 3) Add 0.0385 g of sodium lauryl sulfate to the carbon fiber suspension obtained in step 2), and ultrasonically disperse in a 100 W ultrasonic cleaner for 1 h;

[0053] 4) Add 8.4 mL of aniline monomer to the dispersion obtained in step 3), stir for 0.5 h, and keep the temperature in an ice bath for 0.5 h; put 13.729 g of ammonium persulfate and 10 mL of deionized water into a constant pressure dropping funnel, Controlled...

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Abstract

The invention discloses an antistatic EVA foamed composite and a preparation method thereof. First, a surface active agent is adopted for improving the surfaces of carbon fibers, then aniline is loaded on the carbon fibers in an in-situ polymerization mode, and modified carbon fibers are formed; crystalline flake graphite and the modified carbon fibers are mixed according to the mass ratio of 1:1-5:1 to form an antistatic agent, and then the antistatic agent and an EVA substrate are subjected to melt blending and cross-linking foaming to prepare the antistatic EVA foamed composite. The prepared EVA foamed composite has a good antistatic property, and compared with a pure EVA foamed material, the volume resistivity of the EVA foamed composite is lowered by about seven orders of magnitudes; moreover, due to introduction of the carbon fibers, the tensile strength and elongation at break are also improved, and the antistatic EVA foamed composite is especially suitable for protective packaging of some sensitive elements and military instruments and has extensive social and economic benefits.

Description

technical field [0001] The invention belongs to the field of preparation of polymer composite foam materials, and in particular relates to an antistatic EVA foam composite material and a preparation method thereof. Background technique [0002] EVA (ethylene-vinyl acetate copolymer) has good flexibility and processability, and the prepared foam material is often used in packaging, sports facilities, etc. due to its good elasticity and excellent cushioning and shock absorption. field, reflecting the excellent cost performance. However, EVA foam has high volume resistivity like most plastics, generally in the range of 10 14 Ω·cm or more, which will inevitably limit its application in many fields, such as packaging and transportation in the textile industry; packaging, transportation, storage, etc. of electrostatic sensitive components in the electronics industry; various products in the mining industry and military industry. Packaging and storage etc. Therefore, it is extre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08K13/06C08K9/10C08K9/04C08K7/06C08K7/00C08K3/04C08K5/14C08J9/10C08G73/02
CPCC08G73/0266C08J9/103C08J2203/04C08J2323/08C08J2479/02C08L23/0853C08L2201/04C08L2203/14C08L79/02C08K13/06C08K9/10C08K9/04C08K7/06C08K7/00C08K3/04C08K5/14
Inventor 郑玉婴连汉青林为王月香
Owner FUZHOU UNIV
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