Korea Institute of Science and Technology

University of Massachusetts

US Government As Represented by the Secretary of the Army

Bon-Cheol Ku

Todd Emrick

E Bryan Coughlin

Richard J Farris

Michael R Beaulieu

Nam Ho You

Thangamani Ranganathan

Munju Goh

Jayant Kumar

Ramaswamy Nagarajan

Ok-kyung Park

Joong Hee Lee

Ferdinando F Bruno

Lynne Ann Samuelson

Susan Tripathy, Legal Representative

Hyeonuk Yeo

Sang Jun Youn

Sucharita Roy

Soo-Hyoung Lee

Sung Ho Lee

Heon Ju Lee

Myoung-Woon Moon

Seong-Mu Jo

Han-Ik Joh

Jin Young Jung

Jun Kyung Kim

Junyeon Hwang

Weeradech Kiratitanavit

Han Ik Jo

Seok In Na

Subhalakshmi Nagarajan

Sung-Ho Lee

Wonjin Jo

Jin Seong Lim

Seung Gyu Park

Sethumadhavan Ravichandran

Han Sol You

Jin Won Yu

Hyeon-uk Yeo

Se-Joon Park

Yong Mun Choi

The present disclosure relates to a preparation method for lowering a production cost of a high performance carbon fiber using a nanocarbon composite carbon fiber precursor fiber crosslinked by electron beam. More particularly, the present disclosure relates to a preparation method of a nanocarbon composite carbon fiber, including a nanocarbon containing step for containing nanocarbon in a structure of a carbon fiber precursor fiber, a nanocarbon composite carbon fiber precursor fiber preparation step for forming a composite of the nanocarbon and the carbon fiber precursor fiber by electron beam irradiation to enable crosslinking for improved heat resistance of the carbon fiber precursor fiber containing the nanocarbon, an oxidation&#x22c5;stabilization step for oxidizing&#x22c5;stabilizing the nanocarbon composite carbon fiber precursor fiber, and a carbonization step for carbonizing the oxidized&#x22c5;stabilized nanocarbon composite carbon fiber precursor fiber, and a nanocarbon composite carbon fiber prepared by the preparation method.

Nanocarbon composite carbon fiber with low cost and high performance and their preparation method

A cured epoxy resin material is depolymerized by using a composition including a compound represented by the chemical formula of XOY(wherein X is hydrogen, alkali metal or alkaline earth metal, Y is halogen, m is a number satisfying 1&#x2264;m&#x2264;8 and n is a number satisfying 1&#x2264;n&#x2264;6), and a reaction solvent, wherein X is capable of being dissociated from XOYand Y radical is capable of being produced from XOYin the reaction solvent. It is possible to carry out depolymerization of a cured epoxy resin material, for example, at a temperature of 200&#xb0; C., specifically 100&#xb0; C. or lower, and to reduce processing cost and energy requirement. It is also possible to substitute for a reaction system using an organic solvent as main solvent, so that the contamination problems caused by the organic solvent functioning as separate contamination source may be solved and environmental contamination or pollution may be minimized.

Method and composition for depolymerization of cured epoxy resin materials

For depolymerization of a cured epoxy resin material, used is a composition including a transition metal salt or a transition metal oxide containing a transition metal element (metal element that belongs to Groups 3-12 in the Periodic Table). In the reaction solvent, an oxidation occurs by the medium of the transition metal element so that the cured epoxy resin material may be depolymerized and decomposed. In this manner, it is possible to carry out depolymerization of a cured epoxy resin material at a temperature of 200&#xb0; C., specifically 100&#xb0; C. or lower very simply and rapidly, and to reduce the processing cost and energy requirement.

Composition and method for depolymerization of cured epoxy resin materials using transition metal salts

The invention provides novel flame-retardant polymers and materials, their synthesis and use. More particularly, the flame-retardant polymers are deoxybenzoin-derived polymers.

Deoxybenzoin-derived anti-flammable polymers

The present invention relates to a 3D printer polymer filament improving strength of a polymer resin and providing durability by using graphene coated metal nanoparticles and carbon nanotubes, and expressing a function of the graphene coated metal nanoparticles and the carbon nanotubes as a filler, and a manufacturing method thereof. Accordingly, according to the present invention, the 3D printer polymer filament and the manufacturing method includes mixing the graphene coated metal nanoparticles, the carbon nanotubes, and the polymer, using the manufactured mixture to form a filament through extrusion, and forming a 3D printed article by using the filament, thereby improving the strength and the durability by using the graphene coated metal nanoparticles and the carbon nanotubes.

High strength polymer filament for FDM 3D printer including graphene coated metal nanoparticles, nanocarbons for 3D printer, and preparation method of the same

Methods of preparing reduced graphene oxide and reduced graphene oxide-polymer composites. The methods include covalently binding a halogen-substituted aromatic compounds to a graphene oxide and heat treating the graphene oxide with the halogen-substituted aromatic compounds covalently bound thereto at a low temperature, for example, 450&#xb0; C. or less. By using the methods, reduced graphene oxide and reduced graphene oxide-polymer composites that have high electrical conductivities (e.g., 30,000 S/m or more) may be obtained.

Method of preparing reduced graphene oxide and reduced graphene oxide-polymer composites

A chemical compound of structural formula (I) useful in preparation of flame retardant materials is disclosed. Homopolymer, and copolymers of a compound of formula (I), as well as methods of preparing said homo- and copolymers are also disclosed. Polymers described herein advantageous possess low heat release capacities and high char yields.

Flame-retardant derivatives

Provided are a method for post-treatment of a carbonaceous material using dehydrocyclization, a carbonaceous material post-treated by the method, and a polymer composite material including the carbonaceous material. More particularly, provided are a method for post-treatment of a carbonaceous material using dehydrocyclization, including subjecting the carbonaceous material to dehydrocyclization at room temperature to heal structural defects in the carbonaceous material, while increasing the effective conjugated length of the carbonaceous material to improve the electrical conductivity thereof, as well as a carbonaceous material post-treated by the method and a polymer composite material including the carbonaceous material.

Post-treatment method of carbon materials for improving the electrical conductivity and mechanical properties via dehydrocyclization reaction and polymer composite materials comprising the treated carbon materials

The present disclosure relates to a polyimide-graphene composite material and a method for preparing same. More particularly, it relates to a polyimide-graphene composite material prepared by adding modified graphene and a basic catalyst during polymerization of a polyimide precursor so as to improve mechanical strength and electrical conductivity and enable imidization at low temperature and a method for preparing same.

Polyimide-graphene composite material and method for preparing same

Hematin, a hydroxyferriprotoporphyrin, is derivatized with one or more non-proteinaceous amphipathic groups. The derivatized hematin can serve as a mimic of horseradish peroxidase in polymerizing aromatic monomers, such as aromatic compounds. These derivatized hematins can also be used as catalysts in polymerizing aromatic monomers, and can exhibit significantly greater catalytic activity than underivatized hematin in acidic solutions. In one embodiment, polymerization is in the presence of a template, along which aromatic monomers align. An assembled hematin includes alternating layers of hematin and a polyelectrolyte, which are deposited on an electrically charged substrate. Assembled hematin can also be used to polymerize aromatic monomers.

Polymerization of aromatic monomers using derivatives of hematin

Growing community of inventors

Wanju-gun, South Korea

Bon-Cheol Ku