Korea Institute of Science and Technology

Drexel University

Albert S Lee

Seung Sang Hwang

Soon Man Hong

Chong Min Koo

Kyung Youl Baek

Seon Joon Kim

Sangho Cho

Seung Jun Lee

Yury Gogotsi

Yu Ri Lee

Soon Jong Kwak

Jin Young Seo

He Seung Lee

Do Xuan Huy

Sejin Kim

Daesin Kim

Seung-Sock Choi

Sungyoun Oh

Min Hyuk Choi

Que Thi Nguyen

Hang Kyu Cho

Seung Sock Choi

Hwan Gyu Lee

Junpyo Hong

Tae Yun Ko

In Sik In

Se Hyun Doo

Tae Gon Oh

Aamir Iqbal

Kanit Hantanasirisakul

You Mee Choi

The present disclosure relates to a UV- and heat-curable ladder-like polysilsesquioxane copolymer and a method for preparing the same. Since a controlled functionality can be provided only on a desired region via a thiol-ene click reaction without an additional additive, an insulating layer having a low dielectric constant and a microcircuit pattern can be formed without an additional etching process.

UV- and heat-curable ladder-like polysilsesquioxane copolymer, insulation composition containing same and method for forming microcircuit pattern using same

The present invention relates to an etching composition and a method of producing a MXene. The etching composition of the present invention can stably and quickly produce a MXene at high temperature. The etching composition of the present invention can produce a MXene in high yield. The etching composition of the present invention can easily produce various types of MXenes. A method using the etching composition of the present invention can produce a MXene having excellent electrochemical and mechanical properties.

MXene with excellent mechanical strength and fast and high-yield anhydrous synthesis method thereof

In an aspect, the present disclosure provides a heat-treated transition metal carbonitride MXene film annealed at high temperatures and a polymer composite comprising the same. In another aspect, the present disclosure provides a method for producing a heat-treated transition metal carbonitride MXene film comprising: obtaining a MXene aqueous solution containing dispersed 2-dimensional (2D) MXenes through an acid etching process; filtering the obtained MXene aqueous solution through a vacuum filtration process to produce a free-standing film; and annealing the produced free-standing film at high temperatures to obtain a heat-treated transition metal carbonitride MXene film. In still another aspect, the present disclosure provides an electromagnetic interference (EMI) shielding method comprising: superposing a coating comprising a heat-treated transition metal carbonitride MXene film on at least one surface of an object in a contact or non-contact manner.

Transition metal carbonitride MXene films for EMI shielding

The present disclosure relates to 2-dimensional MXenes surface-modified with catechol derivatives, a method for preparing the same, MXene organic ink including the same, and use thereof (e.g. flexible electrodes, conducive cohesive/adhesive materials, electromagnetic wave-shielding materials, flexible heaters, sensors, energy storage devices). Particularly, the simple, fast, and scalable surface-functionalization process of MXenes using catechol derivatives (e.g. ADOPA) organic ligands significantly improves the dispersion stability in various organic solvents (including ethanol, isopropyl alcohol, acetone and acetonitrile) and produces highly concentrated organic liquid crystals of various MXenes (including TiCT, NbCT, VCT, MoCT, TiCT, TiCNT, MoTiCT, and MoTiCT). Such products offer excellent electrical conductivity, improved oxidation stability, excellent coating and adhesion abilities to various hydrophobic substrates, and composite processability with hydrophobic polymers. This finding will lead to further studies on the structures, properties, and physics of the organic MXene liquid crystals and their practical applications.

2-dimensional MXene surface-modified with catechol derivative, method for preparing the same, and MXene organic ink including the same

Disclosed is a recycling apparatus for a cross-linked polyethylene resin using a twin screw extruder. The recycling apparatus for a cross-linked polyethylene resin using a twin screw extruder according to an embodiment of the present disclosure includes: a raw material supply unit configured to supply a raw material that is a cross-linked polyethylene resin; and a twin screw extruder configured to receive the raw material from the raw material supply unit, the twin screw extruder including a cylinder and a twin screw installed inside the cylinder to rotate in the same direction, the twin screw extruder being configured to de-crosslink and recycle the raw material under a de-crosslinking reaction temperature and reaction pressure atmosphere while continuously transporting the raw material along the twin screw by the rotation of the twin screw.

Recycling apparatus for a cross-linked polyethylene resin using twin screw extruder

Provided are a catalyst composition with improved processability and chemical warfare agent degradation ability, a film composite manufactured by casting the same, and a preparation method thereof. Specifically, provided are a catalyst composition including a copolymer of a first polymer and a second polymer; and a metal-organic framework (MOF), and a film composite including the same, wherein processability and catalytic activity are improved.

Catalyst composition with improved chemical warfare agent degradation ability and processability

Disclosed are a method for polymerizing polysilsesquioxane from a trialkoxysiloxane monomer, including: preparing an aqueous organic solution including a trialkoxysiloxane monomer, an organic solvent, water and a catalyst; and selectively preparing a polysilsesquioxane with a cage structure or a polysilsesquioxane with a ladder structure by adjusting the amount of the organic solvent or water in the aqueous organic solution, and a polysilsesquioxane with a cage structure or a polysilsesquioxane with a ladder structure prepared therefrom.

Method for preparing a polysilsesquioxane of a controlled structure and polysilsesquioxane prepared by the same

Disclosed is a light-emitting material including a polysilsesquioxane having a ladder structure with photoactive groups bonded to a siloxane backbone. In addition to superior heat resistance and mechanical property, the light-emitting material provides improved cotability and film property when prepared into a thin film. Further, it provides higher luminous efficiency than the existing organic-based light-emitting material.

Light-emitting material comprising photoactive group-bonded polysilsesquioxane having a ladder structure, thin film using the same and organic electronic device comprising the same

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Seoul, South Korea

Albert S Lee