GB/T 40568-2021 Active National standards

GB/T 40568-2021 Nanotechnologies—Characterization of multiwall carbon nanotubes—Mesoscopic shape factors

Publish Date: 2021-10-11 Implement Date: 2022-05-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 40568-2021

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Synthetic materials

ICS Name: Physicochemical analysis methods

Publish Date: 2021-10-11

Implement Date: 2022-05-01

Pages: 19 pages

Scope

This document describes the characterization methods for the mesoscopic shape factor of multi-walled carbon nanotubes (MWCNTs). The characterization techniques employed include scanning electron microscopy (SEM), transmission electron microscopy (TEM), viscosity method, and light scattering method, etc.
This document also includes additional provisions for defining the static bending persistence length (SBPL) characterization, and provides a measurement method for evaluating SBPL, whose length typically ranges from tens of nanometers to hundreds of micrometers.
This document draws on concepts and mathematical expressions from polymer physics to define the mesoscopic shape factor of MWCNTs.