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Polypropylene composite material capable of sending blue green light under the condition of UV tigght irradiation

A technology of composite materials and polypropylene, which is applied in the field of composite materials, can solve the problem of non-uniform dispersion of inorganic nano-powders, and achieve good application prospects and low environmental pollution.

Inactive Publication Date: 2002-11-20
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies in the prior art, to provide a polypropylene composite material that can emit blue-green light under ultraviolet light irradiation and its preparation method, to overcome the inability of the inorganic nano-powder to be uniformly dispersed in polypropylene in the usual blending method. The shortcomings of the material, improve the performance of the material, and expand the application range of the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: the preparation of organic montmorillonite

[0015] Add 0.467mol n-hexadecylamine, 0.056mol concentrated hydrochloric acid and 100ml deionized water into a 500ml beaker, and heat the solution to 80°C to prepare n-hexadecylammonium bromide intercalation agent. In addition, disperse the montmorillonite in 400ml 80°C dispersant deionized water, and stir evenly. Then the dispersion of montmorillonite was added to the solution containing n-16 alkylammonium intercalation agent and vigorously stirred for 1 hour. After filtering, put the white precipitate in a 500mml beaker, add 400ml hot water, stir for 1 hour, and filter. This process is repeated more than three times to remove residual ammonium salts. The final product was filtered and cooled and dried for later use. Preparation of blue-green light composite materials

[0016] 7g of above-mentioned organomontmorillonite and 50g of polypropylene powder were stirred evenly on a high-speed stirrer (the stirrer...

Embodiment 2

[0016] 7g of above-mentioned organomontmorillonite and 50g of polypropylene powder were stirred evenly on a high-speed stirrer (the stirrer speed was 1500 rpm), then blended at 200°C on a Haake mixer, and mixed for 15 minutes. The rotation speed is 30 rpm, take it out, cut it into pieces, and cool it down to obtain a composite material at the molecular level observed by a transmission electron microscope. The material can emit blue-green light with a wavelength of 430-580nm under the irradiation of a light wave with a wavelength of 375nm. Embodiment 2: the preparation of organic montmorillonite

[0017] Add 0.5mol cetyltrimethylammonium bromide, 0.07mol concentrated hydrochloric acid and 100ml deionized water into a 500ml beaker, and heat the solution to 100°C to make cetyltrimethylammonium bromide layer agent. In addition, montmorillonite was dispersed in 500 ml of deionized water (dispersant) at 100° C., and stirred evenly. Then the dispersion of montmorillonite was added ...

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Abstract

The preparation method of polypropylene compound material capable of sednign blue-green light under the action of UV light irradiation is characterized by adopting cation exchang method to modifying laminate inorganic nano montmorillonoid material, dispersing agent and organic intercalation agent, then combine them with polypropylene so as to prepare the compound material with fluorescence property. Said prepared compound material can be used as polymer fluorescent material or fluorescence marking material, specially it can be used in application field having need of blue-green light, also can be used as agricultural film.

Description

Technical field: [0001] The invention relates to a polypropylene composite material capable of emitting blue-green light under ultraviolet light irradiation, which is a thermoplastic fluorescent composite material composed of polypropylene and nanometer montmorillonite. The invention belongs to the technical field of composite materials. Background technique: [0002] Polypropylene has good electrical insulation properties, high impact strength and tensile strength, excellent stress crack resistance, creep resistance and dimensional stability, heat resistance, low temperature resistance, aging resistance, chemical resistance It is also one of the raw materials with the largest output in the plastics industry. The preparation process is simple, the comprehensive performance is good, and the cost is low. By filling polypropylene with inorganic nano-fillers, polypropylene is endowed with fluorescent properties. It is of practical significance to expand its application range an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/36C08K9/06C08L23/12
Inventor 戚嵘嵘周持兴
Owner SHANGHAI JIAO TONG UNIV
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