Abstract:
The fiber defects such as voids in yarn which were formed during the manufacturing process were removed through the structure elaboration process. For example, AN 25 wt.% and DMSO 75 wt.% were polymerized at 60≦̸C for 7hrs in the presence of initiator AIBN 0.15 mol.% on the basis of AN. The unreacted AN in the polymer solution was removed and the polymer solution was spun into 50% DMSO aqueous solution through the 0.12 mm spinning nozzle and extended as 2.5 times in the 70≦̸C water and then the extended yarn was dried primary at 90-120≦̸C and silicone was applicated on it and dried secondary at 120-170≦̸C and the yarn was extended again as 7.5 times.
Abstract:
본 발명은 대기 중으로 압출 방사되었을 때 용매가 자발적으로 상분리되어 나오는 자발 응고에 의한 무연신 초극세 아크릴 섬유의 제조 방법에 관한 것이다. 본 발명은 a)통상의 방법에 따라 아크릴로니트릴 단량체 단독, 또는 아크릴로니트릴 단량체 70중량% 이상과, 1종 이상의 공단량체 30중량% 미만을 유기 용매중에서 중합시켜 제조된 분자량이 150,000~1,500,000이고, 고유 점도가 1~15dl/g인 아크릴 중합체 3 내지 20중량% 농도의 방사 조성물을 얻는 단계, b)상기 단계 a)에서 얻은 방사 조성물을 대기 중으로 압찰 방사하여 가늘게 함으로써 용매가 자발적으로 상분리되어 나오는 발 응고 단계, 및 c)상기 단계 b)에서 얻은 압출 필라멘트를 방사 노즐로부터 일정 거리에서 일정 속도 이상으로 권취하는 단계로 이루어진다. 본 발명의 방법은 다기 중에서 일정 속도 이상으로 권취하여 배향 결정화시켰기 때문에 후연신 없이도 강도를 지닌 초극세 아크릴 섬유를 기존의 아크릴 방사법에 비하여 훨씬 간편하고 경제적으로 제조할 수 있다.
Abstract:
The present invention relates to a polymer stabilizing device using a grid structure. The polymer stabilizing device comprises: a polymer stabilizing chamber; a polymer feeding hole which feeds polymers into the polymer stabilizing chamber; a polymer discharge hole which discharges the polymer to the outside of the polymer stabilizing chamber; a transferring unit which is disposed in the polymer stabilizing chamber and transfers the polymers from the polymer feeding hole to the polymer discharge hole; a plasma discharging unit which is disposed in the polymer stabilizing chamber so as to generate plasma; and an electric power supply source which applies electric power to the plasma discharging unit. The plasma discharging unit includes a grid-structured first electrode disposed to be adjacent to the transferring unit and a second electrode disposed to be adjacent to the first electrode. Accordingly, the plasma is discharged near the polymers so that stabilization is promoted, and direct contact between the plasma and the polymers is prevented so that damage to or deformation in the polymers can be prevented.
Abstract:
섬유상 필터는 초극세 섬유가 연속적으로 랜덤하게 배치되어 있으며, 기공 크기 분포에서 최대 빈도의 기공 크기가 0.1~2 ㎛인 섬유상 다공체, 그리고 이방성 나노재료가 배치되어 있으며, 기공 크기 분포에서 최대 빈도의 기공 크기가 1~100 nm인 나노네트층(nanonet layer)을 갖는 여과층을 포함한다. 섬유상 필터는 바이러스와 중금속과 같은 극미세 입자까지도 제거할 수 있는 우수한 여과효율을 가지면서도 여과시 압력손실이 낮아 높은 투과유량을 나타내며, 공기 및 수처리 필터로 유용하게 사용될 수 있다.
Abstract:
PURPOSE: A nano complex with bohemite in a nano-net structure and a production method thereof are provided to use as an air and water treatment filter since the nano complex shows high permeation flux as pressure loss is small when filtered simultaneous with having excellent filtering efficiency capable of removing virus within water and/or the air. CONSTITUTION: A bohemite nano complex has an anisotropy bohemite [(Al(OOH), Al(OH)_3] with a nano-net structure positioned on a surface of polymer nano fibers, polymer-metal oxide mixed nano fibers, or metal oxide nano fibers. An average diameter of the anisotropy bohemite is 1-50 nano meter or a ratio of a fiber length compared to the average fiber diameter is 50-1000. One component has a multi core structure when the complex is a mixture of more than two polymers and the other composition get a shell structure.
Abstract:
PURPOSE: A desiccant oxide-polymer composite electrolyte membrane is provided to have excellent dimensional stability and mechanical properties and to have excellent ion conductivity even under high temperature and low humidity environment, thereby capable of improving power of a high-temperature polymer electrolyte fuel cell. CONSTITUTION: A desiccant oxide-polymer composite electrolyte membrane is that hydrogen-ion conductive polymers are filled into a nanofiber-like porous material which is manufactured by electrospinning a spinning solution comprising sol-gel solution of desiccant oxide-polymer is filled. The electrospinning solution is a mixed solution of sol-gel solution of desiccant oxide precursor and polymer solution. The polymer solution comprises polysulfone, polyimide, polyethersulfone, polyetheretherketone, polyvinylidenefluoride, polybenzimidazole and polyacrylonitrile.