Abstract:
A spinning syringe is provided to make it possible to manufacture a dual fiber when a nanofiber is manufactured through electro-spinning, by constituting the spinning syringe in a dual type so as to spin two types of material simultaneously. A spinning syringe is composed of a small syringe(10), a large syringe(20), and a piston(30). A nozzle(11) is inserted into a front side of the small syringe. A rear side of the small syringe is opened, and a first solution is put into the small syringe through the rear side of the small syringe. The small syringe is inserted into the large syringe through an opened rear side of the large syringe. A dual nozzle(23) has a first spinning groove and a second spinning groove at an outer circumference of the first spinning groove. The nozzle of the small syringe is contacted with the first groove of the dual nozzle. The dual nozzle is filled with a second solution. The piston is inserted into the large syringe, and a joining pole(32) is extended from a front side of the piston in a longitudinal direction of the piston. The joining pole is screw-joined to a small syringe pressing body(31), wherein the small syringe pressing body presses an inside of the small syringe to spin the first solution. The piston is screw-joined to a large syringe pressing body(33), wherein the large syringe pressing body presses the second solution within the large syringe.
Abstract:
The present invention relates to a graphite nanofiber and a production method thereof. The production method of the graphite nanofiber comprises the steps of: mixing a carbon fiber precursor material and a solvent to obtain a mixed solution; adding a metal precursor and homogenizing the mixed solution; adding silicon oxide and homogenizing the mixed solution; producing fibers by electrospinning the homogenized mixed solution; and thermally treating the produced fibers. The graphite nanofiber produced by the method has a structure where graphite sheets are vertically arranged with respect to the nanofiber axis, and contains graphene, catalyst metal particles, and silicon compounds to be used for an electrode material of a solar cell or a secondary battery. [Reference numerals] (AA) Start;(BB) End;(S11) Mix a carbon fiber precursor material and a solvent to obtain a mixed solution;(S12) Add a metal precursor and firstly homogenize the mixed solution;(S13) Add silicon oxide and secondly homogenize the mixed solution;(S14) Produce fibers by electrospinning the homogenized mixed solution;(S15) Thermally treat the fibers;(S16) Obtain graphene-containing graphite nanofibers
Abstract:
PURPOSE: A method for fabricating carbon nano fiber containing intermetallic compounds is provided to property control the size of the compounds and diameter of the fiber. CONSTITUTION: A method for fabricating carbon nano fiber containing intermetallic compounds comprises a step of adding two or more metal precursors to a carbon fiber precursor material to prepare a fiber precursor composition; and a step of spinning the fiber precursor composition at 220-300°C by 0.1~10°C/minutes and performing thermal treatment at final temperature for 0.5-5 hours. The fiber precursor composition further contains polyvinyl pyrrolidone resin and oxygen atoms.
Abstract:
본 발명은 저독성 폴리에스터계 분체도료의 경화제로 유용한 2-하이드록시 아마이드 화합물, 이의 제조방법 및 이를 경화제의 주성분으로 포함하는 폴리에스터 분체도료 조성물에 관한 것이다. 분체도료, 저독성, 폴리에스터, 경화제, β-HAA, 2-하이드록시-N,N,N',N'-테트라키스(2-하이드록시에틸)알킬아마이드, 2-하이드록시 아마이드
Abstract:
본 발명은 폴리아크릴로나이트릴(Polyacrylonitrile)과 망간전구체의 혼합 고분자 용액을 전기방사하여 나노섬유를 제조하고 이를 산화안정화, 탄화, 활성화한 나노사이즈의 포어를 갖는 흡착제에 관한 것이다. 보다 상세하게는 벤젠(Benzene), 톨루엔(Toluene), 크실렌(Xylene)등의 휘발성유기화합물(VOCs)을 효과적으로 흡착시킬 수 있는 섬유상 흡착제에 관한 것으로, 본 발명의 섬유상 흡착제는 평균직경이 200 ~ 400 nm이며, 비표면적이 853 내지 1300 m 2 /g, 미세세공의 직경인 약 5.6 내지 6.0 Å, 중대기공의 직경이 59 내지 91 Å이며, 종래 입상활성탄에 비하여 휘발성유기화합물의 흡착력이 매우 우수하다. 섬유상 흡착제, 휘발성유기화합물, 폴리아크릴로나이트릴, 망간전구체, 흡착, 혼합 전기방사
Abstract:
PURPOSE: A 2-hydroxy amide compound is provided to suppress generation of micro holes and to improve mechanical strength and heat resistance. CONSTITUTION: A 2-hydroxy amide compound is represented by chemical formula 1, wherein A is linear or branched (C1~C7) alkylene; R1 ~ R4 are selected from linear or branched (C1~C7) alkyl in which at least one -OH is substituted. The 2-hydroxy amide compound is pure (S)-stereoisomer, pure (R)-stereoisomer or their mixture.
Abstract:
A fibrous adsorbent for VOC absorption using a fiber precursor composition and a manufacturing method thereof are provided to offer excellent adsorption capacity of volatile organic compounds rapidly. A manufacturing method of a fibrous adsorbent for VOC absorption using a fiber precursor composition includes the following steps of: producing a fiber precursor compound by adding a fibrous adsorbent for VOC absorption using a fiber precursor composition 0.1 ~ 5 weight% in polyacrylo nitrile resin dissolved liquid after dissolving polyacrylo nitrile resin in a solvent; producing the fiber by adding voltage of 20 ~ 30kV with the fiber precursor compound; stabilizing the fiber in air atmosphere for 0.5 ~ 3 hours; carbonizing the oxidized and stabilized fiber in the inert atmosphere or a vacuum state to temperature of 800 ~ 1000°C; and activating the carbonized fiber in the steam atmosphere.