Patent ID: 11959193
Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC D  C | IPC C  D

Claim 0:
1. A method of manufacturing an aramid and carbon-nanotube composite fiber, comprising:
preparing a spinning dope having a lyotropic liquid crystal phase by adding both of an aramid and carbon nanotubes into a super strong acid, wherein the spinning dope only includes the aramid, the carbon nanotubes, and the super strong acid; and
manufacturing a composite fiber by spinning the spinning dope, wherein the composite fiber is manufactured by spinning the spinning dope at 10° C. to 150° C.,
wherein the step of adding both of the aramid and the carbon nanotubes into the super strong acid enables to simultaneously control a π bonding force between the carbon nanotubes and the aramid to have the lyotropic liquid crystal phase,
wherein the carbon nanotubes have
an amount of 11 parts by weight to 900 parts by weight based on 100 parts by weight of the aramid,
a purity of 80% or more, and
an IG/ID of 30 or more,

wherein the amount, the purity, and the IG/ID of the carbon nanotubes and the π bonding force between the carbon nanotubes and the aramid control an orientation of the lyotropic liquid crystal phase.