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Polyethylene grafted carbon nanomaterial, and preparation method thereof

A technology of polyethylene grafting and carbon nanomaterials, which is applied in the field of nanomaterials and can solve problems such as difficulties in olefin polymerization and polyolefin graft modification

Active Publication Date: 2017-03-29
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the polymerization of olefins is relatively difficult, and polyolefins are chemically inert, which brings difficulties to the grafting modification of polyolefins in nanomaterials.

Method used

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  • Polyethylene grafted carbon nanomaterial, and preparation method thereof
  • Polyethylene grafted carbon nanomaterial, and preparation method thereof
  • Polyethylene grafted carbon nanomaterial, and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0094] This embodiment provides a preparation method of polyethylene-grafted carbon nanomaterials (polyethylene-grafted carbon nanotubes), the steps of which are as follows:

[0095] Take 0.5 g of carbon nanotubes and disperse them ultrasonically in 150 mL of tetrahydrofuran for 1 hour, then bubble nitrogen for 15 minutes. 0.5 g of phthaloyl peroxide and 2.5 mL of (3-mercaptopropyl)trimethoxysilane were added. Under the protection of nitrogen, react in an oil bath at 60°C for 12 hours. After the reaction, the solid was obtained by filtration; washed three times with tetrahydrofuran, and dried in vacuum at 40° C. for 12 hours to obtain trimethoxysilane-modified carbon nanotubes (structure shown in formula A-1).

[0096] Take 0.5 g of the trimethoxysilane-modified carbon nanotubes prepared above and first disperse them in 150 mL of toluene. After ultrasonic dispersion for 1 hour, add 3 g of trimethylsiloxane-capped polyethylene (as shown in formula A-0, where PE is a polyethyl...

Embodiment 2

[0100] This embodiment provides a preparation method of polyethylene-grafted carbon nanomaterials (polyethylene-grafted carbon nanotubes), the steps of which are as follows:

[0101] Take 2 g of carboxylated carbon nanotubes and ultrasonically disperse them in 600 mL of chlorobenzene system for 0.5 hours. 0.25 g of N-hydroxyphthalimide and 10 mL of (2-isocyanatoethyl)tripropoxysilane were added. Under the protection of nitrogen, react in an oil bath at 60°C for 12 hours. After the reaction, the solid was obtained by filtration; washed three times with alcohol, and dried in vacuum at 40° C. for 12 hours to obtain a carbon nanotube modified with tripropropoxysilane (expressed in formula B-1).

[0102] Take 0.5g of the above-mentioned tripropropoxysilane-modified carbon nanotubes and first disperse them in 500mL of chlorobenzene. After ultrasonic dispersion for 0.5 hours, add 7g of triethylsiloxane-capped polyethylene (as shown in formula B-0), Put it in a 130°C oil bath to ful...

Embodiment 3

[0106] This embodiment provides a preparation method of polyethylene-grafted carbon nanomaterials (polyethylene-grafted carbon nanotubes), the steps of which are as follows:

[0107] Take 1 g of hydroxylated carbon nanotubes and ultrasonically disperse them in 500 mL of dimethyl sulfoxide for 1 hour. Add 0.1 g stannous octoate, 0.1 g ditin dilaurate and 10 mL (5-aminopentyl) triethoxysilane. Under the protection of nitrogen, react in an oil bath at 60°C for 12 hours. After the reaction, the solid was obtained by filtration; washed three times with alcohol, and dried in vacuum at 40° C. for 12 hours to obtain triethoxysilane-modified carbon nanotubes (expressed in formula C-1).

[0108] Take 3g of the triethoxysilane-modified carbon nanotubes prepared above and first disperse them in 1000mL of benzene. After ultrasonic dispersion for 1 hour, add 20g of tripropylsiloxane-capped polyethylene (as shown in formula C-0) , placed in a 140°C oil bath to fully dissolve. 0.2 g of 1,8...

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Abstract

The invention provides a polyethylene grafted carbon nanomaterial, and a preparation method thereof. The structure of the polyethylene grafted carbon nanomaterial is represented by formula I, wherein A is used for representing carbon nanotube or graphene; R is used for representing -S-, -OCONH- or -CONH-; R1 is used for representing C1-C6 methylene; B is used for representing a tri-functionality silanol condensation compound, and the silicon atom is connected with 0 to 2 hydroxyls; C is used for representing a structure represented by formula II, PE is used for representing polyethylene, R2 is used for representing -CH2CH2S-, -CH(OH)CH2NH-, or -OCONH-, R3 is used for representing C1-C6 straight-chain saturated alkyl, the molecular weight of polyethylene is controlled to be 300 to 3000g / mol, and the polydispersity index ranges from 1 to 5. The invention also discloses the preparation method of the polyethylene grafted carbon nanomaterial. The raw materials of the polyethylene grafted carbon nanomaterial are widely available and cheap; the product structure is accurate; the synthesis route of the preparation method is simple; and practicability is high.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and relates to a polyethylene grafted carbon nanometer material and a preparation method thereof. Background technique [0002] Polyolefin has excellent performance and low price. It is widely used in daily life, industry, agriculture and other fields. It is the largest synthetic resin variety in the world. Nanomaterials bring huge room for performance improvement of polymer materials, including mechanical properties, thermal conductivity, electrical conductivity / antistatic properties, gas barrier properties, and magnetic properties. Polyolefin nanocomposites are expected to provide new opportunities for the high performance of traditional polyolefins. Carbon nanomaterials are a very representative class of nanomaterials. When the carbon skeleton in the form of a planar six-membered ring is folded and arranged in different ways in space as a basic unit, a 0-dimensional (spherical, Fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00
CPCC08G83/001
Inventor 李化毅张勇杰李倩胡友良
Owner PETROCHINA CO LTD
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