Lg Chem, Ltd

Postech Academy-industry Foundation

Eugene Oh

Ji Eun Kim

Won Jae Lee

Juhan Kim

Hyun Woo Park

Dongchul Lee

Seungyong Son

Jaehong Lee

KwangWoo Yoon

Ye Hoon Im

Dong Hyun Cho

Jihee Woo

Jun Won Choi

SungJin Kim

Seungyong Lee

Kun-Hong Lee

Hyungsik Jang

Jinmyung Cha

Kwang Woo Yoon

Uk Yeong Kim

Ogsin Kim

Hyunjung Cho

Youngjin Yi

The present invention relates to a method for preparing a carbon nanotube fiber which is a continuous array of carbon nanotube. The present invention enables minimization of rotational flow inside a tube reactor and thus can facilitate enhanced tensile strength of the prepared carbon nanotube fiber.

Method for preparing carbon nanotube fiber having enhanced tensile strength

The present invention relates to a method for producing a carbon nanotube fiber aggregate and provides a carbon nanotube fiber aggregate having an improved level of alignment through ultrasonic wave application and low speed recovery.

Method for producing carbon nanotube fiber aggregate having improved level of alignment

The present invention relates to a method for enhancing tensile strength of a carbon nanotube (CNT) fiber aggregate, comprising dispersing a CNT fiber aggregate with chlorosulfonic acid (CSA), followed by thermal treatment, wherein a particular magnitude of tension is applied upon the thermal treatment, whereby the CNT fiber aggregate is increased in alignment level and tensile strength.

Method for enhancing tensile strength of carbon nanotube fiber aggregate

The present invention relates to a method for preparing a carbon nanotube fiber aggregate formed of single-wall carbon nanotubes, and the manufacturing efficiency of a carbon nanotube fiber comprising single-wall carbon nanotubes can be improved by controlling the molar ratio of a carbon source and of a reducing gas in a carrier gas.

Method for preparing single-wall carbon nanotube fiber assembly

The present invention relates to a method for controlling the strength of a carbon nanotube fiber aggregate, wherein the strength of the carbon nanotube fiber aggregate can be improved by controlling the molar ratio of the carbon source to reducing gas.

Method for controlling strength of carbon nanotube fiber aggregate

The present invention relates to a supported catalyst that can be used to produce a carbon nanotube aggregate with high bulk density, a method for preparing the supported catalyst, a carbon nanotube aggregate produced using the supported catalyst, and a method for producing the carbon nanotube aggregate. According to the present invention, the bulk density of the carbon nanotube aggregate is easily controllable. Therefore, the carbon nanotube aggregate is suitable for use in various fields.

Method for manufacturing carbon nanotube agglomerate having controlled bulk density

The present invention relates to a method for producing carbon nanostructures using a fluidized bed reactor. According to the method, some of the as-produced carbon nanostructures remain uncollected and are used as fluidic materials to improve the fluidity in the reactor. The method enables the production of carbon nanostructures in a continuous process. In addition, the fluidity of the catalyst and the fluidic materials in the reactor is optimized, making the production of carbon nanostructures efficient.

Carbon nanostructure preparation method, carbon nanostructure prepared by means of same, and composite material comprising same

Provided is an apparatus for producing a carbon nanotube fiber. The apparatus includes: a vertical reactor having a reaction zone; an inlet through which a spinning solution is introduced into the bottom of the reaction zone of the reactor; an inlet through which a carrier gas is introduced into the bottom of the reaction zone of the reactor; heating means for heating the reaction zone; and a discharge unit disposed on the top of the reaction zone and through which a carbon nanotube fiber is discharged from the reactor. The spinning solution entering the reaction zone through the spinning solution inlet is carbonized and graphitized while ascending from the bottom of the reaction zone by the carrier gas entering through the carrier gas inlet, to form a carbon nanotube fiber consisting of continuous aggregates of carbon nanotubes. Further provided is a carbon nanotube fiber produced using the apparatus. The carbon nanotube fiber is long and exhibits high electrical conductivity, tensile strength, and elasticity. Due to these advantages, the carbon nanotube fiber is expected to find a variety of applications, including multifunctional composite materials, deformation/damage sensors, transmission cables, and electrochemical devices, for example, microelectrode materials for biological substance detection, supercapacitors, and actuators.

Device for manufacturing carbon nanotube fibers and method for manufacturing carbon nanotube fibers using same

Growing community of inventors

Daejeon, South Korea

Eugene Oh