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Polymer based nanocomposite and preparing method thereof

A nanocomposite material and composite material technology, applied in the field of polymer nanocomposite materials and their preparation, can solve the problems of high toxicity of coupling reagents, single preparation ideas, cumbersome operation, etc., and achieve simple preparation, simple operation, and improved thermal stability performance effect

Inactive Publication Date: 2014-04-16
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the shortcomings of the prior art, such as cumbersome operation, huge toxicity of coupling reagents, single preparation idea, etc.

Method used

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  • Polymer based nanocomposite and preparing method thereof
  • Polymer based nanocomposite and preparing method thereof
  • Polymer based nanocomposite and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The first step, the preparation of graphite oxide solid;

[0051] Pre-oxidize 20g of natural graphite (400 mesh) with 30mL of concentrated sulfuric acid, 10g of potassium persulfate and 10g of phosphorus pentoxide at 80°C, wash with water until pH = 7, and dry overnight at room temperature for use;

[0052] Cool 460mL of concentrated sulfuric acid to about 0°C, then add 20g of pre-oxidized graphite into it, slowly add 60g of potassium permanganate so that the temperature of the system does not exceed 20°C, after the addition is completed, raise the temperature to 35°C, and stir for 2 hours, And slowly add 920mL of deionized water in batches, so that the system temperature does not exceed 98°C, and after stirring for 15 minutes, add 2.8L of deionized water and 50mL of 30% hydrogen peroxide. The resulting bright yellow suspension was filtered under reduced pressure and washed. Until there is no sulfate ion in the filtrate, and when it is neutral, the product is dried in ...

Embodiment 2

[0065] The first to fourth steps are the same as steps one to four in Example 1;

[0066] In the fifth step, mix the GOCl obtained in the third step with the solution prepared in the fourth step, adjust the reaction temperature to 80°C, and react with constant temperature stirring for 2 days;

[0067] In the sixth step, the crude product obtained in the fifth step is suction-filtered, washed, and dried to obtain the β-CDs functionalized graphene nano-hybrid material, denoted as: GO-CDs 80 ;

[0068] Steps 7 to 10 are the same as steps 7 to 10 in Example 1.

[0069] GO-CDs 80 The infrared spectrum of the filler is as image 3 d, proving that the nano-hybrid material has been successfully synthesized.

[0070] β-CDs functionalized graphene nanohybrid materials (GO-CDs 80 ) thermal stability analysis curve such as Figure 4 As shown in c, it is proved that the thermal stability of the nano-hybrid material has been greatly improved.

Embodiment 3

[0072] The first to fourth steps are the same as steps one to four in Example 1;

[0073] In the fifth step, mix the GOCl obtained in the third step with the solution prepared in the fourth step, adjust the reaction temperature to 90°C, and react with constant temperature stirring for 2 days;

[0074] In the sixth step, the crude product obtained in the fifth step is suction-filtered, washed, and dried to obtain the β-CDs functionalized graphene nano-hybrid material, denoted as: GO-CDs 90 ;

[0075] Steps 7 to 10 are the same as steps 7 to 10 in Example 1.

[0076] GO-CDs 90 The infrared spectrum of the filler is as image 3 e shows that the nano-hybrid material has been successfully synthesized.

[0077] The photo of the dispersion performance of the synthesized β-CDs functionalized graphene nano-hybrid material in solvent is as follows: image 3 As shown, it can be found that it can be dispersed not only in high-polarity solvents, but even in low-polarity solvents.

[...

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Abstract

The invention discloses a polymer based nanocomposite and a preparing method thereof. According to the invention, an organic covalent modification technology is adopted, polyhydroxy cyclodextrin molecules are anchored on a graphene oxide nanosheet through a coupling agent, excellent dispersion in various solvents is realized through utilizing the hydroxyl on the cyclodextrin to simulate the characteristic that the graphene oxide is enriched with oxygen species, the capacity of cyclodextrin on the graphene oxide is controlled through adjusting the reaction temperature, further the solvent dispersing performance and thermal stability of functionalized hybrid materials can be effectively regulated and controlled; besides, the solvent blending technology is adopted, the cyclodextrin functionalized grapheme based nano hybrid materials are used as fillers to prepare different-polymer based nanocomposite; through the adoption of the method, the intermolecular and intramolecular interfacial interaction are further enhanced so as to improve the thermal stability of the functionalized nano materials and polymer based nanocomposite adopting the nano materials as fillers, besides, the synthetic steps are simple and efficient, the aftertreatment is simple and concise, and large-scale preparation is facilitated.

Description

technical field [0001] The invention relates to a polymer nanocomposite material and a preparation method thereof, in particular to a polymer nanocomposite material in which a cyclodextrin functionalized graphene-based nano-hybrid material is used as a filler and a preparation method thereof, belonging to the field of material preparation. Background technique [0002] Polymer-based nanocomposites are a new type of composite materials formed by compounding various nano-units and organic polymer materials in various ways. Due to the scientific combination of the surface interface effect, small size effect and quantum size effect of nanoparticles, and the excellent properties of polymers such as low density and easy processing, they can present novel properties superior to conventional polymers. The development and application of composite materials has become a research hotspot in material science in the new century. [0003] Graphene is a new material with a single-layer sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L71/08C08L33/12C08L25/06C08K9/04C08K9/02C08K3/04
Inventor 张树鹏宋海欧刘斌李成印陈威姚冬婷余荣兵周江放
Owner NANJING UNIV OF SCI & TECH
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