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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Применить Всего найдено 8. Отображено 8.
17-05-2018 дата публикации

PREPARATION METHOD OF THERMOPLASTIC POLYURETHANE CONTAINING AZIDE GROUP

Номер: KR101858992B1
Автор: JUNG, HYUN SOOK, LEE, BUM JAE, LEE, KYUNG JIN, JANG, JI UK, MOON, DA SOM, YANG, HEE SANG, CHOI, JI HYUN, YING WUBIN
Принадлежит: AGENCY FOR DEFENSE DEVELOPMENT

The present invention relates to a preparation method which can control the content of an azide group in thermoplastic polyurethane. The present invention provides a preparation method of thermoplastic polyurethane, which comprises the steps of: preparing a solution of poly(epichlorohydrin-co-tetrahydrofuran)diol copolymer which is represented by chemical formula 1; adding sodium azide to the poly(epichlorohydrin-co-tetrahydrofuran)diol copolymer solution to prepare poly(glycidyl azide polymer-co-tetrahydrofuran)diol which is represented by chemical formula 2; mixing the poly(glycidyl azide polymer-co-tetrahydrofuran)diol and 1,4-butanediol in a predetermined ratio to prepare a mixture; and mixing the mixture with methylene diphenyl diisocyanate to synthesize thermoplastic polyurethane of chemical formula 3. COPYRIGHT KIPO 2018 ...

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Номер записи: 1
15-06-2015 дата публикации

METHOD FOR PREPARING 5-HYDROXYMETHYL-2-FURFURAL USING METAL TRIFLATE CATALYSTS UNDER BIOMASS-DERIVED ETHYLENE GLYCOL BASED SOLVENT

Номер: KR1020150065630A
Автор: CHO, JIN KU, KIM, YONG JIN, KIM, BAEK JIN, MUN, DA SOM
Принадлежит:

Provided is a method for preparing 5-hydroxymethyl-2-furfural usingmetal triflate catalysts under biomass-derived ethylene glycol based solvent, the method which uses straight or ring ethylene glycol-based compounds as solvent, and comprises the step of preparing 5-hydroxymethyl-2-furfural, from fructose, using metal trifalte catalysts. According to this invention, dependency on oil can be reduced and suitable measures can thus be taken for greenhouse gas regulations. Also, 5-hydroxymethyl-2-furfural can be prepared from fructose at a high yield; and after the reaction, solvent and catalysts can be efficiently managed and reused. COPYRIGHT KIPO 2015 ...

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Номер записи: 2
08-09-2016 дата публикации

HETEROGENEOUS BRONSTED ACID CATALYST SUPPORTED ON CARBON MATERIAL AND ESTERIFICATION METHOD OF FATTY ACIDS WITH POLYHYDRIC ALCOHOL USING SAME

Номер: KR1020160105965A
Автор: CHO, JIN KU, MUN, DA SOM, KIM, BO RA, KIM, YONG JIN, SHIN, SEUNG HAN, SEO, JA MIN, HONG, U NA
Принадлежит:

The present invention relates to a heterogeneous Bronsted acid catalyst supported on a carbon material, and an esterification method of fatty acids with polyhydric alcohol using the same. The esterification method comprises: a powder preparation step for pulverizing wood-based biomass to produce powder; a carbon material preparation step for thermally treating the powder to be incompletely carbonized to produce a carbon material; a sulfonation step for treating the carbon material with sulfuric acid substituted with an electrophilic group to introduce sulfonic acid groups thereon in order to produce a sulfonated heterogeneous Bronsted acid catalyst supported on the carbon material; and an esterification step for performing esterification of fatty acids with polyhydric alcohol by using the acid catalyst in the absence of a solvent. According to the present invention, a high esterification rate can be achieved by applying the heterogeneous Bronsted acid catalyst supported on the carbon material ...

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Номер записи: 3
11-03-2025 дата публикации

심방세동 진단을 위한 엑소좀 내 긴 비암호화 RNA(long non-coding RNA) 바이오마커 및 이의 용도

Номер: KR102780724B1
Автор: 정보영, 강지영, 윤누리, 문다솜, 김효은, 천유민
Принадлежит: 연세대학교 산학협력단

... 본 발명은 심방세동 환자 혈청 엑소좀 내 긴 비암호화 RNA (long non-coding RNA; lncRNA) 프로파일 분석 결과를 바탕으로 심방세동 진단용 LOC105377989, LOC105375434, LOC107986997 및 LOC101927073을 포함하는 혈청 엑소좀 내 lncRNA 바이오마커 조성물을 제공한다. 이를 이용하는 경우, 비침습적이고 체외 진단이 가능하며, 심방세동 진단에 우수한 효과를 보여 심방세동의 유용한 진단 바이오마커로서 활용 가능성이 매우 높다.

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Номер записи: 4
17-10-2017 дата публикации

PREPREG MADE FROM MONOMER OF POLYETHERSULFONE POLYMER AND METHOD FOR MANUFACTURING SAME

Номер: KR101785241B1
Автор: BAE, SOO BIN, PARK, JONG KYOO, LEE, BUM JAE, LEE, MAN YOUNG, CHOI, DU YOUNG, MOON, DA SOM
Принадлежит: AGENCY FOR DEFENSE DEVELOPMENT

The present invention relates to a prepreg made from monomers of polyethersulfone polymers and a method for manufacturing the same. A prepreg is manufactured by coating or immersing an epoxy resin mixture in a reinforced fiber. The epoxy resin mixture comprises an alkyne monomer including an ether group and a sulfone group in one molecule and an azide monomer including an azide group (-N_3) as two types of monomers capable of forming polyethersulfone polymers, a curing agent and an epoxy resin. Provided is a prepreg providing excellent interlayer destruction toughness when manufacturing a prepreg composite due to the epoxy resin mixture in which polyethersulfone polymers are uniformly distributed as a reinforcing agent in which two types of the monomers are polymerized. COPYRIGHT KIPO 2017 ...

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Номер записи: 5
23-01-2017 дата публикации

SIDE MIRROR BLIND

Номер: KR1020170008117A
Автор: CHOI, SU JIN, SHIN, HYUN BAL, JUNG, SU JIN, MOON, DA SOM, KIM, SANG GIL
Принадлежит:

The present invention relates to a side mirror blind and, more specifically, relates to a side mirror for a vehicle, provided with a mirror case embedded with a front mirror with the fixed size for confirming the rear direction. The side mirror blind comprises: a blind cover box coupled to the upper side of the mirror case, installed to be movable in the up and down directions on the surface of the front mirror, and formed with a blind groove having a blind fabric entered and exited to the lower unit; and an operation handle having one end coupled to the blind fabric and having the other end coupled to the fixed unit of the mirror case, for moving the position of the blind fabric. Accordingly, the side mirror blind has convenient effects in preventing the frost, the burning, the stain, and the like of the side mirror during the parking of a vehicle, due to the automatic blind. COPYRIGHT KIPO 2017 ...

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Номер записи: 6
15-06-2016 дата публикации

METHOD OF PREPARING CARBON MATERIAL-BASED HETEROGENEOUS BRONSTED ACID CATALYST AND CARBON MATERIAL-BASED HETEROGENEOUS BRONSTED ACID CATALYST PREPARED THEREBY

Номер: KR1020160068072A
Автор: CHO, JIN KU, MUN, DA SOM, KIM, BO RA, KIM, YONG JIN, SHIN, SEUNG HAN, SEO, JA MIN, HONG, U NA
Принадлежит:

The present invention relates to a method of preparing a carbon material-based heterogeneous Bronsted acid catalyst characterized by including the following steps of: a powder preparation step for pulverizing lignocellulosic biomass to prepare powder; a carbon material preparation step for performing incomplete carbonization by heat treating the powder to prepare a carbon material; and a sulfonic acid group introducing step for processing the carbon material with a compound represented by Chemical formula 1 to introduce a sulfonic acid group, and to a carbon material-based heterogeneous Bronsted acid catalyst prepared thereby. According to the present invention, it is possible to obtain a carbon material-based heterogeneous Bronsted acid catalyst with an excellent mechanical property and an excellent catalytic activity. COPYRIGHT KIPO 2016 (AA) Start (BB) End (S10) Step of preparing powder (S20) Step of preparing carbon material (S30) Step of introducing sulfonic acid group ...

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Номер записи: 7
22-03-2017 дата публикации

탄소체 기반의 불균일계 브뢴스테드 산촉매 및 이를 이용하는 다가알코올에 의한 지방산의 에스테르화 방법

Номер: KR0101718143B1
Автор: 조진구, 문다솜, 김보라, 김용진, 신승한, 서재민, 홍유나
Принадлежит: 한국생산기술연구원

... 본 발명은 탄소체 기반의 불균일계 브뢴스테드 산촉매 및 이를 이용하는 다가 알코올에 의한 지방산의 에스테르화 방법에 관한 것으로, 상기 방법은 목질계 바이오매스를 분쇄하여 분말을 제조하는 분말 제조단계; 상기 분말을 열처리하여 불완전 탄화시킴으로써 탄소체를 제조하는 탄소체 제조단계; 설폰산기가 도입된 탄소체 기반의 불균일계 브뢴스테드 산촉매를 제조하기 위하여, 상기 탄소체에 전자끄는 기가 치환된 황산을 처리하여 설폰산기를 도입하는 설폰산기 도입단계; 및 상기 산촉매를 이용하여, 무용매 조건하에서, 다가 알코올과 지방산의 에스테르화 반응을 수행하는 단계를 포함하는 것을 특징으로 한다. 본 발명에 의하면, 기계적 물성이 우수한 촉매 활성이 우수한 탄소체 기반의 불균일계 브뢴스테드 산촉매를 다가 알코올과 지방산의 에스테르화 반응에 적용함으로써, 높은 에스테르화 수율을 얻을 수 있다.

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Номер записи: 8