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Method for making core-shell polyhedral oligomeric silsesquioxane (POSS) coated multi-walled carbon nanotube (MWNT)

A technology of multi-walled carbon nanotubes and silsesquioxane, which is applied in the treatment of dyed organosilicon compounds, fibrous fillers, etc., can solve problems such as performance damage, difficulty in large-scale production, and structural breakage of carbon nanotubes. Achieve the effect of low cost and easy operation

Active Publication Date: 2014-06-04
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are also many studies that have tried similar methods, but the acidification treatment has seriously damaged the structure of carbon nanotubes, resulting in damage to their performance. For this reason, many workers have tried to use the conjugated double bonds on the surface of carbon nanotubes to improve However, the result is that the coating is not uniform enough, or the process is cumbersome, and it is difficult to carry out large-scale production, or the monomer can only be coated on the carbon nanotubes, and the coating cannot be well controlled. thickness, and the monomers used are limited to a single reactive functional group such as (amino group, hydroxyl group, etc.), rarely involving monomers containing C=C double bonds

Method used

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  • Method for making core-shell polyhedral oligomeric silsesquioxane (POSS) coated multi-walled carbon nanotube (MWNT)
  • Method for making core-shell polyhedral oligomeric silsesquioxane (POSS) coated multi-walled carbon nanotube (MWNT)
  • Method for making core-shell polyhedral oligomeric silsesquioxane (POSS) coated multi-walled carbon nanotube (MWNT)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 50 mg of carbon nanotubes, place them in a three-necked flask, add 20 ml of DMF as a solvent, and ultrasonically disperse for 15 min. Weigh 250 mg of mma-POSS, add it into the above-mentioned three-necked flask, and sonicate for 15 min. Add 80ml of DMF solvent and sonicate for 15min. The three-necked flask was moved into an oil bath, under nitrogen protection, 12.5 mg of initiator benzoyl peroxide was added, and stirred at room temperature for 15 min. Raise the temperature to 80°C, react for 8 hours, and stop the reaction. The product was obtained by suction filtration, washed with N,N-dimethylformamide, dimethyl sulfoxide, deionized water, ethanol, and chloroform for 15 minutes, and finally the target product was obtained by suction filtration. figure 2 (a) is the core-shell composite powder of mma-POSS-coated carbon nanotubes prepared in this example (the specific flow chart is shown in Figure (1)). It can be seen from the figure that there is a thin layer o...

Embodiment 2

[0021] Weigh 50 mg of carbon nanotubes, place them in a three-necked flask, add 20 ml of DMF as a solvent, and ultrasonically disperse for 10 min. Weigh 500 mg of mma-POSS, add it into the above-mentioned three-neck flask, and sonicate for 15 min. Add 80ml of DMF solvent and sonicate for 15min. The three-necked flask was moved into an oil bath, under nitrogen protection, 12.5 mg of initiator benzoyl peroxide was added, and stirred at room temperature for 15 min. Raise the temperature to 80°C, react for 8 hours, and stop the reaction. The product was obtained by suction filtration, washed with N,N-dimethylformamide, dimethyl sulfoxide, deionized water, ethanol, and chloroform for 15 minutes, and finally the target product was obtained by suction filtration. figure 2 (b) is the core-shell composite powder of mma-POSS-coated carbon nanotubes prepared in this example. It can be clearly seen that there is a thick layer of coating material on the outer wall of the multi-walled c...

Embodiment 3

[0023] Weigh 50 mg of carbon nanotubes, place them in a three-necked flask, add 20 ml of DMSO as a solvent, and ultrasonically disperse for 10 min. Weigh 100 mg of mma-POSS, add it into the above-mentioned three-neck flask, and sonicate for 15 min. Add 80ml DMSO solvent and sonicate for 15min. Move the three-necked flask into an oil bath, and under the protection of nitrogen, add the initiator compounded by ferrous sulfate / potassium persulfate, including 13 mg of ferrous sulfate and 19.5 mg of potassium persulfate, and stir at room temperature for 15 min. Raise the temperature to 60°C, react for 8 hours, and stop the reaction. The product was obtained by suction filtration, washed with N,N-dimethylformamide, dimethyl sulfoxide, deionized water, ethanol, and chloroform for 15 minutes, and finally the target product was obtained by suction filtration. figure 2(c) is the core-shell composite powder of mma-POSS-coated carbon nanotubes prepared in this example. It can be clearl...

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Abstract

A method for making a core-shell POSS coated MWNT belongs to the technical field of composite material preparation. The MWNT having different POSS coating thicknesses is made through a solution process by the initiation of octamethyl acrylate based POSS monomers under a free radical initiator (benzoyl peroxide / ferrous sulfate / potassium persulphate), wherein the coating thicknesses are 5-10nm, 15-25nm and 30-50nm respectively. The method does not need any pretreatment processes comprising acidification or oxidation of carbon nanotubes, has no destroy to the structure of the carbon nanotubes, has small influences of the influences of the carbon nanotubes, simultaneously selects the industrially commonly used free radical initiator and its initiation system, and is an effective way for preparing the core-shell MWNT; and the method has the advantages of simple technology, low production cost, wide industrial prospect and the like.

Description

technical field [0001] The invention relates to a method for preparing a multifunctional cage-type silsesquioxane-coated carbon nanotube core-shell composite powder, which belongs to the technical field of composite material preparation. Background technique [0002] Carbon nanotubes have attracted the attention of researchers because of their excellent mechanical, electrical, thermal, optical, dielectric and electromagnetic properties. However, due to the relatively strong interaction between carbon nanotubes, it is easy to agglomerate, so in order to make full use of the performance of carbon nanotubes, usually choose to modify the surface of carbon nanotubes to improve the carbon nanotubes Dispersion in polymer matrix, stability and compatibility with matrix. In recent years, the use of coating technology to modify the surface of carbon nanotubes to prepare core-shell composite fillers has attracted widespread attention, especially for its unique application in the perfo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/44C09C3/12
Inventor 陈广新孙达李齐方
Owner BEIJING UNIV OF CHEM TECH
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