Method for preparing carbon nanotube by use of biodegradable plastic

A technology for degrading plastics and carbon nanotubes, applied in the removal of solid waste, etc., can solve the problems of non-renewable raw materials and complicated processes, and achieve the effects of avoiding greenhouse gas emissions, simple processing equipment, and reducing energy consumption.

Inactive Publication Date: 2011-07-06
UNIV OF SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing carbon nanotubes using biodegradable plastics, so as to overcome the defects of non-renewable raw materials and complicated processes in the existing carbon nanotube production technology, and to achieve the purpose of fully utilizing biodegradable plastics

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  • Method for preparing carbon nanotube by use of biodegradable plastic
  • Method for preparing carbon nanotube by use of biodegradable plastic
  • Method for preparing carbon nanotube by use of biodegradable plastic

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Zinc nitrate and aluminum nitrate are prepared in a molar ratio of 3:1 to prepare an aqueous solution with a total metal ion concentration of 0.5 mol / l; at room temperature, under stirring, add dropwise an alkali solution with a molar concentration of 1.5 mol / l to adjust the pH to 10, Then heat up to 80°C, add sodium dodecyl sulfate 1.5 times the molar weight of trivalent ions to modify the product, react for 15 hours, centrifuge the precipitate, wash with water until neutral, and obtain organically modified zinc after drying Aluminum double hydroxide.

[0031] Add 85% biodegradable plastic polybutylene succinate into the internal mixer according to the mass ratio, start stirring after heating to a molten state, and then add 10% of the zinc organically modified with sodium lauryl sulfate prepared above After aluminum double hydroxide and 5% nickel oxide are melted and blended uniformly, a polybutylene succinate compound is obtained.

[0032] The polybutylene succinate ...

Embodiment 2

[0036] Magnesium nitrate and ferric nitrate are formulated into an aqueous solution with a total concentration of metal ions of 1 mol / l at a molar ratio of 4:1; at room temperature, under stirring, add dropwise an alkali solution with a molar concentration of 1.0 mol / l to adjust the pH to 9.5, Then heat up to 120°C, add sodium dodecylbenzenesulfonate twice the molar weight of trivalent ions to modify the product, react for 12 hours, centrifuge the precipitate, wash with water until neutral, and obtain organically modified Magnesium iron double hydroxide.

[0037] 87% biodegradable plastic polylactic acid, 8% organically modified magnesium-iron double hydroxide prepared above and 5% iron oxide were premixed at room temperature according to the mass ratio, then added to the twin-screw extruder, and melted After granulation, the material is cut to obtain a polylactic acid compound.

[0038] The polylactic acid compound was placed in a quartz tube, fed with nitrogen, and the quar...

Embodiment 3

[0042] Nickel nitrate and aluminum nitrate are formulated into an aqueous solution with a total metal ion concentration of 1 mol / l at a molar ratio of 3:1; an alkali solution with a molar concentration of 2.0 mol / l is added dropwise under stirring at room temperature to adjust the pH to 9.0, Then heat up to 98°C, add sodium dodecyl sulfate 1.0 times the molar weight of trivalent ions to modify the product, react for 48 hours, centrifuge the precipitate, wash it with water until neutral, and obtain organically modified nickel after drying Aluminum double hydroxide.

[0043] Dissolve 92% biodegradable plastic polyvinyl alcohol, 6% organically modified nickel-aluminum double hydroxide and 2% nickel oxide in dimethyl sulfoxide according to the mass ratio, stir and reflux, and dry to remove solvent to obtain polylactic acid composites.

[0044] The polylactic acid compound was placed in a quartz tube, fed with nitrogen gas, and the quartz tube was placed in a tube furnace at a tem...

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Abstract

The invention discloses a method for preparing carbon nanotubes by use of biodegradable plastics. The method is characterized in that a biodegradable composite is prepared from the following materials by melt-bending method using an internal mixer or double-screw extrusion method or solution reaction method: (by mass) 85% to 99% of a biodegradable plastic, 0.6% to 10% of an organically modified layered compound and 0.4% to 5% of a catalyst; then a mixture containing carbon nanotubes is prepared by Muffle furnace method or tube furnace method; and finally the carbon nanotubes are produced by purification treatment. Based on the barrier effect of the layers of the organically modified layered compound on the pyrolysis product of the biodegradable plastic, the volatile components of the biodegradable plastic are transformed to the carbon nanotubes under the action of the catalyst. The method for preparing the carbon nanotubes simplifies the process and the equipment, reduces the requirements for reaction conditions, and adopts the easily-accessible and recyclable biodegradable plastic as carbon source, so as to not only reduce the energy consumption but also solve the problem of greenhouse gas emissions during the degradation process of the biodegradable plastic.

Description

technical field [0001] The invention belongs to the technical field of preparing carbon nanotubes by using biodegradable plastics, and in particular relates to a method for preparing carbon nanotubes by pyrolysis of biodegradable plastics under the action of an organically modified layered compound and a catalyst. Background technique [0002] Carbon nanotubes have been widely used because of their excellent mechanical strength, electrical conductivity and chemical properties. At present, the commonly used preparation methods of carbon nanotubes mainly include arc discharge method, laser ablation method, chemical vapor deposition method and solid phase pyrolysis method. However, the carbon sources used in these existing preparation methods are usually small organic hydrocarbon molecules, the cost of raw materials is high, and these methods consume high energy, require relatively harsh reaction conditions, and the process is relatively complicated. In recent years, the deman...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B09B3/00
Inventor 胡源洪宁宁宋磊聂士斌
Owner UNIV OF SCI & TECH OF CHINA
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