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Graphene quantum dot-polymer composites and methods of making the same

A technology of graphene quantum dots and composite materials, applied in the field of graphene quantum dot-polymer composite materials and their preparation

Inactive Publication Date: 2017-03-22
RICE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Current methods for fabricating quantum dot-polymer composites have limitations in terms of scalability, cost-effectiveness, biodegradability and photoluminescent properties

Method used

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  • Graphene quantum dot-polymer composites and methods of making the same
  • Graphene quantum dot-polymer composites and methods of making the same
  • Graphene quantum dot-polymer composites and methods of making the same

Examples

Experimental program
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Effect test

Embodiment 1

[0112] Example 1. Fluorescent polymer composite film containing coal-derived graphene quantum dots

[0113] In this example, the fluorescent polymer composite was prepared by casting from an aqueous solution. Polyvinyl alcohol (PVA) is used as the polymer matrix. Graphene quantum dots (GQD) derived from coal are mixed with a polymer matrix. The coal-derived GQD imparts fluorescent properties to the polymer matrix, and the prepared composite film shows solid-state fluorescence. The optical, thermal and fluorescent properties of PVA / GQD nanocomposites were studied. The high optical transparency (78%-91%) of the composite film and the best dispersion of the nanoparticles were observed at a GQD concentration of 1% to 5% by weight. The maximum photoluminescence intensity is obtained when the GQD content is 10% by weight.

[0114] In this example, PVA was selected as the matrix polymer because of its hydrophilicity, including water solubility, high optical transparency, good chemica...

Embodiment 11

[0116] Example 1.1. Materials

[0117] Put poly(vinyl alcohol) ( Hydrolysis, molecular weight 89000-98000, Sigma-Aldrich), bituminous coal (Fisher Scientific), sulfuric acid (95-98%, Sigma-Aldrich) and nitric acid (70%, Sigma-Aldrich) Company) use as supplied. Purify GQD with a dialysis bag (Membrane Filtration Products Co., Ltd., product number 1-0150-45 (MembraneFiltration Products, number 1-0150-45)).

Embodiment 12

[0118] Example 1.2. GQD synthesis

[0119] According to the previously described procedure, GQD synthesized from bituminous coal is oxidized in a mixture of sulfuric acid and nitric acid. See, for example, Ye R et al., Nat. Commun. 2013, 4:2943. See also International Patent Application PCT / US2014 / 036604.

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Abstract

Various embodiments of the present disclosure pertain to methods of forming polymer composites that include polymers and graphene quantum dots. The methods occur by mixing a polymer component (e.g., polymers, polymer precursors and combinations thereof) with graphene quantum dots. In some embodiments, the polymers are in the form of a polymer matrix, and the graphene quantum dots are homogenously dispersed within the polymer matrix. In some embodiments, the graphene quantum dots include, without limitation, coal-derived graphene quantum dots, coke-derived graphene quantum dots, unfunctionalized graphene quantum dots, functionalized graphene quantum dots, pristine graphene quantum dots, and combinations thereof. Additional embodiments of the present disclosure pertain to polymer composites that are formed by the methods of the present disclosure. In some embodiments, the polymer composites of the present disclosure are fluorescent and optically transparent. In some embodiments, the polymer composites of the present disclosure are in the form of a film.

Description

[0001] Cross references to related applications [0002] This application claims priority from U.S. Provisional Patent Application 62 / 002,982 filed on May 26, 2014. In addition, this application relates to the international patent application PCT / US2014 / 036604 filed on May 2, 2014, which claims the priority of the US provisional patent application 61 / 818,800 filed on May 2, 2013. The entire content of the aforementioned application is incorporated herein by reference. [0003] Statement on Federally Funded Research / Development [0004] This invention was made with government support. The support includes the grant number N00014-09-1-1066 granted by the U.S. Department of Defense, FA9550-12-1-0035 authorized by the U.S. Department of Defense, and FA9550- authorized by the U.S. Department of Defense. 09-1-0581. The government has certain rights in this invention. Background technique [0005] Current methods for manufacturing quantum dot-polymer composites have limitations in terms o...

Claims

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Application Information

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IPC IPC(8): B82Y20/00H01L29/15H01L31/0264H01L51/54
CPCC08F2/44C08K2201/011C08J5/18C08J2329/04C08K3/042B82Y20/00B82Y30/00B82Y40/00C08K9/04C09K11/025C09K11/06C09K11/65C09K2211/10Y10S977/734Y10S977/842Y10S977/847Y10S977/95C08L29/04C08L101/00C08L25/06C08J3/20C08L101/12H01L33/26C08L2201/10C08K3/04
Inventor J·M·托尔A·科瓦查克相昌盛
Owner RICE UNIV
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