Korea Institute of Science and Technology

Drexel University

Chong Min Koo

Soon Man Hong

Seung Sang Hwang

Kyung Youl Baek

Albert S Lee

Seon Joon Kim

Sangho Cho

Hyun Ji Kim

Albert Sung Soo Lee

Hyeon Yeol Jeon

Jin Young Seo

Soon Jong Kwak

Sejin Kim

Daesin Kim

Do Xuan Huy

Seung Jun Lee

Yury Gogotsi

Min Jae Ko

Yun Jae Lee

Hyun Chul Park

Hyunchul Park

Seung Gun Yu

Yu Ri Lee

Kie Yong Cho

He Seung Lee

Min Ho Kim

Won Jun Na

Min Hyuk Choi

Younghan Song

Que Thi Nguyen

Jang Woo Lee

Yeojin Ahn

Hye-rim Kim

Changju Sung

Hwan Gyu Lee

Hang Kyu Cho

Seung Sock Choi

Junpyo Hong

Sueng Sang Hwang

Tae Yun Ko

In Sik In

Se Hyun Doo

Jin Hong Lee

Tae Gon Oh

Aamir Iqbal

Kanit Hantanasirisakul

Seunggun Yu

Seon-ja Song

You Mee Choi

Hyesung Cho

Young Yeol Jo

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

The present invention relates to a 2-dimensional MXene particle surface-modified with a functional group comprising a saturated or unsaturated hydrocarbon, a preparation method thereof, and a use thereof (e.g., a conductive film).

2-dimensional MXene particle surface-modified with functional group containing saturated or unsaturated hydrocarbon, preparation method thereof and use thereof

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

The present invention relates to a method for preparing size-modulated UiO-66, which is achieved by modulating the concentrations of reactants, and a catalyst with improved activity of hydrolyzing chemical warfare agents prepared by the method.

Method for preparation of size-modulated UiO-66 and catalyst for hydrolysis of chemical warfare agents with enhanced activity prepared thereby

A method of preparing a polymer hollow particle, a low-specific gravity and monodispersed polymer hollow particle of various shapes prepared using the method, and a composite including the polymer hollow particle are provided. The method includes: a first step of providing, onto a substrate including a engraved pattern, at least one expandable particle comprising a foaming agent-containing expandable core and a thermoplastic polymer shell; a second step of removing an excess of the at least one expandable particle from a resulting product of the first step; a third step of expanding the at least one expandable particle in the engraved pattern of the substrate by thermally treating a resulting product of the second step; and a fourth step of separating, from the substrate, expanded hollow polymer particles which are a resulting product of the third step.

Polymer hollow particle, a method of preparing the same, and composite comprising the polymer hollow particle

Disclosed is a self-healing polysilsesquioxane and a hybrid film using the same. Once crosslinked, the polysilsesquioxane copolymer can self-heal within several minutes at 100-120&#xb0; C. The self-healing polysilsesquioxane copolymer can be prepared into a hybrid material in the form of a film. Because the hybrid film has an excellent ability of self-healing the damage caused by external impact, it is applicable to wide applications such as gas separation membranes, etc., without limitation.

Self-healing polysilsesquioxanes and hybrid film using the same

The present invention provides a method for producing polythiophene star copolymer capable of being self-doped by an external stimulus, which includes the steps of: forming a polythiophene macroinitiator made by introducing a living radical polymerizable functional group into an end of polythiophene or a derivative thereof; forming through living radical polymerization a polymer macroinitiator for providing by an external stimulus at least a dopant selected from the group consisting of sulfonic acid radical, carboxylic acid radical and phosphoric acid radical; and polymerizing the polythiophene macroinitiator added with the polymer macroinitiator and at least one kind of divinyl monomer to produce the polythiophene star copolymer. The polythiophene star copolymer capable of being self-doped by an external stimulus according to the present invention is a self-doped material to stably increase conductivity, and can be used as a material for a conductive film.

Polythiophene star copolymer capable of being self-doped by external stimulus, a method for producing the same, a conductive thin film using the same, and a method for producing the conductive thin film

The present invention relates to a method for preparing graphene using a spontaneous process, and particularly, to a method for mass-producing high-quality graphene composed of a single layer or several layers by using lithium intercalation of a graphite electrode occurring during the process of charging a lithium ion battery and a lithium ion capacitor in the preparation of graphene to form a graphite intercalation compound, and performing exfoliation through a reaction with water (or alcohol).

Method for preparation of graphene using spontaneous process

Provided is a mercapto-based polysilsesquioxane having a thiol group (&#x2014;SH) introduced to at least one side chain of polysilsesquioxane, represented by the following Chemical Formula 1 (In Chemical Formula 1, each of R, Rand Ris independently selected from the group consisting of a thiol aromatic group, thiol aliphatic group and organic functional group, wherein at least one of R, Rand Ris a thiol aromatic group or thiol aliphatic group, and n is an integer of 1-10,000). 

Mercapto-based polysilsesquioxane and method for preparing functional polysilsesquioxane using the same

Provided are a CNT-polymer complex and a process for preparing the same. The CNT-polymer complex includes carbon nanotubes (CNT) coated with a block copolymer of a conjugated polymer and a non-conjugated polymer, wherein the non-conjugated polymer comprises at least one monomer selected from the group consisting of styrene, butadiene, isoprene, methacryl, acryl, acryl amide, methacryl amide, acrylonitrile, vinyl acetate, vinyl pyridine and vinyl pyrrolidone in which at least one selected from the group consisting of a sulfone group, carboxyl group, acryl group and phosphate group is protected with a protective group, and provides at least one dopant selected from the group consisting of a sulfone group, carboxyl group, acryl group and phosphate group by external stimuli so that self-doping is allowed; and the complex is soluble to an organic solvent in a neutral state but is insoluble to any solvent after subjecting it to external stimuli.

CNT-polymer complex capable of self-doping by external stimuli and process for preparing the same

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

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Seoul, South Korea

Chong Min Koo