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Styrenic-based polymer coated silver nanoparticle-sulfonated polyester composite powders and methods of making same

A technology of silver nanoparticles and composite powder, applied in the field of composites, can solve problems such as incomplete disinfection of surfaces and cracks

Active Publication Date: 2017-10-24
XEROX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Washing alone will not fully sanitize the surfaces and crevices of these products

Method used

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  • Styrenic-based polymer coated silver nanoparticle-sulfonated polyester composite powders and methods of making same
  • Styrenic-based polymer coated silver nanoparticle-sulfonated polyester composite powders and methods of making same
  • Styrenic-based polymer coated silver nanoparticle-sulfonated polyester composite powders and methods of making same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0072] This example describes the preparation of a branched sodiosulfonated amorphous polyester (BSPE) according to an embodiment of the disclosure.

[0073] A branched amorphous sulfonated polyester resin was prepared as follows, comprising 0.425 molar equivalents of terephthalate, 0.080 molar equivalents of sodium 5-sulfoisophthalate, 0.4501 molar equivalents of 1,2-propanediol, and 0.050 molar equivalents of equivalent of diethylene glycol. In a one liter Parr reactor equipped with a heated bottom discharge valve, high viscosity twin turbine agitator and distillation receiver with cold water condenser, charged 388 grams of dimethyl terephthalate, 104.6 grams Sodium 5-sulfoisophthalate, 322.6 grams of 1,2-propanediol (1 molar excess of diol), 48.98 grams of diethylene glycol (1 molar excess of diol), trimethylolpropane (5 grams), and 0.8 grams of butyltin oxide hydroxide as catalyst. The reactor was heated with stirring to 165°C for 3 hours, and then heated again to 190°C ...

example 2

[0075] This comparative example shows the preparation of BSPE core particles without silver and without styrene shell.

[0076] Reactions were carried out in a 3 neck 500 mL round bottom flask equipped with overhead stirrer, reflux condenser, thermocouple, hot plate and nitrogen inlet (condenser served as nitrogen outlet). The flask was charged with 125 mL of deionized water (DIW) at room temperature (approximately 22°C). The DIW was heated to 90°C with stirring while running nitrogen through the solution (RPM = 330). Then 50.0 g of finely ground solid BSPE from Example 1 was added to the DIW (RPM=400). The solution was stirred at 90°C for 2 hours (RPM=400). A BSPE emulsion was obtained and cooled to room temperature with stirring (RPM=400). The final appearance of the BSPE emulsion is a white opaque solution.

example 3

[0078] This comparative example shows the formation of a styrene shell around a BSPE core particle with no silver dispersed within the core particle.

[0079] Reactions were carried out in a 3 neck 500 mL round bottom flask equipped with overhead stirrer, reflux condenser, thermocouple, hot plate and nitrogen inlet (condenser served as nitrogen outlet). Approximately 240 mL of deionized water was charged to the flask at room temperature (22°C). Turn on the heat and set to 90°C and run nitrogen through the system for 30 minutes (RPM = 300). Once the temperature had stabilized, 50.0 g of finely ground BSPE from Example 1 was added to the flask (RPM = 300). The resulting solution was translucent with a blue tinge and was left to stir for 2 hours. The set point was then lowered to 75°C. Once the temperature had stabilized, 3.6 g of styrene (9% of total monomer) was added followed by dropwise addition of a solution of ammonium persulfate (0.08 g of ammonium persulfate dissolved ...

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Abstract

The invention provides styrenic-based polymer coated silver nanoparticle-sulfonated polyester composite powders and a methods of making the same. The composite powder includes a core particle comprising a sulfonated polyester matrix and a plurality of silver nanoparticles dispersed within the matrix, and a shell polymer disposed about the core particle, and methods of making thereof. Various articles can be manufactured from such composite powders.

Description

Background technique [0001] The present disclosure relates to composites, particularly polymer-coated composites comprising metal nanoparticles dispersed throughout a composite matrix, for use in selective laser sintering (SLS) applications. [0002] The medical community is rapidly increasing its reliance on three-dimensional 3D printing for different applications and encompasses, for example, tissue and organ manufacturing, customizable devices (such as prosthetics, mouthguards, orthotics, hearing aids, and implants), and communication with controlled drug delivery. An area of ​​pharmaceutical exploration related to the production of personalized medicines. Many of these medical applications require composite materials that inhibit the growth of bacteria, microbes, viruses or fungi. Other products used for 3D printing, such as kitchen tools, toys, educational materials, and countless household items also provide a favorable environment for bacterial growth, and antimicrobia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L25/06C08K3/08C08J3/16C08F112/08
CPCC08F112/08C08J3/16C08L67/02C08K2201/011C08J2425/06C08J2367/02B33Y70/10C08L25/06C08K2003/0806C08J3/215C08K3/08C08L67/00C08J2300/10C08J2425/04B33Y80/00C08J3/126B29B7/90B29B9/12B29B2009/125B29B9/16B29C64/153C08J3/20B29C64/135B82Y30/00B01J13/02B29C35/08B33Y10/00A01N25/28A01N59/16C08G63/6886
Inventor V·M·法鲁希亚B·乔莎克瑞恩M·N·克雷蒂安
Owner XEROX CORP
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