US 10,947,118 B2 · Carbon nanotubes and preparation method thereof by using PET

Abstract

The present invention relates to carbon nanotubes and a preparation method thereof by using PET. The carbon nanotubes of the present invention are prepared by processes of alcoholysis of PET materials, processes of washing, crushing and calcining unreacted intermediates and so on. By the preparation method of the present invention, multi-walled carbon nanotubes prepared by using waste PET have a good conductivity, and are a structure of top-down array with low aspect ratio. The method of the present invention is not only easy to implement, but also does not need a catalyst, and turns the waste PET into treasure, which solves the problem of environmental pollution caused by the increasingly serious waste PET. FIG. 9.

Claims15

Dependent claims

A method for preparing carbon nanotubes, comprising the steps of:

step (1):
carrying out alcoholysis of PET packaging materials with alcohol, to obtain alcoholysis products and intermediates comprising partial alcoholysis products of PET packaging materials wherein the alcoholysis is not completely carried out,
step (2):
separating the intermediates comprising the partial alcoholysis products of step (1) from the alcoholysis products,
step (3):
crushing the intermediates obtained from step (2) to obtain powder of the intermediates, and
step (4):
calcining the powder of step (3).

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

15/957,011Filed 19 Apr 2018

Priority

CN 201710315340.78 May 2017

Published

US 2018/0319665 A18 Nov 2018

Granted

16 Mar 2021

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

C01B 32/16
Carbon nanotubes: preparation
C01B 2202/06
Structure or properties of carbon nanotubes: multi-walled nanotubes
C01B 2202/36
Nanotubes characterized by their properties: diameter
C01P 2002/82
Defined by measured data other than those specified in group C01P2002/70: by IR- or Raman-data

Carbon nanotubes and preparation method thereof by using PET

Life of this patent

Carbon nanotubes and preparation method thereof by using PET

Life of this patent

Abstract

Claims15