Method for preparing carbon nanofiber by taking halloysite as catalyst

A technology of carbon nanofibers and catalysts, applied in the fields of fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of high price, complex synthesis process, high synthesis temperature, etc., and achieve the effect of low price, rich sources and wide sources

Active Publication Date: 2019-07-26
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned preparation methods usually use small organic molecules as carbon sources, such as acetylene, ethylene, methane, etc.; secondly, metals or metal oxides are used as catalysts, and the synthesis temperature is high and the price is expensive.
Third, the synthesis process is complex and has special requirements for equipment

Method used

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  • Method for preparing carbon nanofiber by taking halloysite as catalyst
  • Method for preparing carbon nanofiber by taking halloysite as catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 100g of halloysite powder was placed in a muffle furnace, calcined at 700°C for 60min, and cooled naturally to obtain a thermally activated halloysite catalyst.

[0029] Dissolve 5g of polybutylene terephthalate / adipate (PBAT) in 50ml of dichloromethane; add 0.5% of the above-mentioned halloysite catalyst, stir ultrasonically for 30min, cast it in a mold, and obtain a PBAT compound after volatilizing the solvent thing.

[0030] Put the PBAT composite in a ceramic crucible, place it in a tube furnace, raise the temperature to 550° C. under a nitrogen atmosphere, heat for 45 minutes, and cool to room temperature to obtain carbon nanofibers.

Embodiment 2

[0032] Place 100g of halloysite powder in a muffle furnace and calcinate at 800°C for 45min. After natural cooling, disperse the sample in ethanol to form a 0.5g / ml suspension. The mixture was reacted for 12 hours, centrifuged, dried at 120° C., crushed and ground to obtain a modified halloysite catalyst.

[0033] According to the mass ratio, 2% of the above-mentioned halloysite catalyst and 98% of polyethylene terephthalate (PET) are evenly mixed and then added to an extruder for melt mixing to obtain a PET compound. Extrusion temperature: 115, 160, 200, 220, 150°C, rotation speed: 150 rpm.

[0034] Put the PET compound in a ceramic crucible, place it in a high-temperature furnace, raise the temperature to 700°C under a nitrogen atmosphere, heat it for 45 minutes, and cool it down to room temperature to obtain carbon nanofibers.

Embodiment 3

[0036] Place 100g of halloysite powder in a muffle furnace and calcinate at 650°C for 45min. After natural cooling, disperse the sample in ethanol to form a 1g / ml suspension. React for 10 hours, centrifuge, dry at 120° C., crush and grind to obtain a modified halloysite catalyst.

[0037] According to the mass ratio, 5% of the above halloysite catalyst and 95% of PBAT are uniformly mixed and then added to an extruder for melt mixing to obtain a PBAT compound. Extrusion temperature: 100, 110, 150, 170, 120°C, rotation speed: 200 rpm.

[0038] Put the PBAT composite in a ceramic crucible, place it in a high-temperature furnace, and raise the temperature to 550° C. under a nitrogen atmosphere, heat for 90 minutes, and cool to room temperature to obtain carbon nanofibers.

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Abstract

The invention discloses a method for preparing a carbon nanofiber by taking halloysite as a catalyst. Polyester serves as a carbon source material, the halloysite serves as the catalyst, the polyesterand the halloysite are melted or mixed by solution to obtain a compound, and the compound is split to prepare the carbon nanofiber. The carbon source is the polyester or recycled polyester, the halloysit is used as the catalyst, and the carbon nanofiber is rich in source, low in cost, green and environmentally friendly. Mixing equipment and splitting equipment are universal equipment, and the method has simple technology .

Description

technical field [0001] The invention belongs to the field of synthetic carbon nanofiber materials, and in particular relates to a method for preparing carbon nanofibers by using halloysite as a catalyst. Background technique [0002] Carbon nanofibers refer to hollow or solid carbon fibers with nanoscale. Its diameter is usually several angstroms to tens of nanometers, and its aspect ratio is tens to several thousand. Because of its high strength, light weight, excellent thermal conductivity, electrical conductivity and other characteristics, it is in great demand in the fields of nanocomposites and has broad application prospects. However, the high cost and complicated process of preparing carbon nanofibers currently limit its application and development. [0003] Usually, carbon nanofibers are prepared by methods such as chemical vapor deposition, catalytic synthesis, arc discharge, and electrospinning, such as the preparation methods of carbon nanomaterials published in...

Claims

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Application Information

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IPC IPC(8): D01F9/26
CPCD01F9/26
Inventor 李旭娟谭道永蔡宗佐张证王玉琪
Owner SOUTHWEAT UNIV OF SCI & TECH
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