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섬유길이에 따른 알지네이트/젤라틴 습식부직포의 물성 변화 연구
공다정,배영환,이현호,박상준,김호동,여상영 한국섬유공학회 2020 한국섬유공학회지 Vol.57 No.1
Gelatin is an easily obtained substance and has a good hemostatic effect, but its manufacture by using a single fiber is difficult. Alginate is a natural nontoxic polymer and is highly absorbable. We prepared with nonwoven fabrics from gelatin and alginate blend fibers for wound dressing. The manufacturing method of a wet-laid nonwoven process was used, that could control the final properties and performance, based on the length or quantity of fibers. The length and the areal density of alginate/gelatin fibers were measured to compare structure, surface, and mechanical properties of nonwovens. Moreover, the fibers were cleaned in combination with various solvents to ensure biological safety, and the cell growth rates were confirmed.
글루타르알데히드 가교 조건에 따른 콜라겐 섬유의 방사성 및 역학적 특성 분석
안현철,공다정,이현호,서주연,김태겸,이소희,여상영 한국섬유공학회 2020 한국섬유공학회지 Vol.57 No.6
Collagen is a natural protein with excellent biocompatibility. Purified collagen isused in various medical and cosmetic products. Fibers made from collagen are particularlyused for medical purposes, but their mechanical properties are not good; therefore, manufacturingprocesses such as crosslinking and blending are being researched and developedto reinforce fibers and improve fiber spinnability. Particularly, in the crosslinking process,fiber properties can be manipulated and adjusted based on the crosslinking agent. In thisstudy, the spinnability and mechanical properties of the fibers were analyzed according tothe crosslinking concentration and crosslinking process time. Through this, the crosslinkedcollagen spinning conditions that can achieve a sufficient crosslinking effect with a minimumconcentration and process time were examined. The processing efficiency andmechanical properties of the collagen fibers were improved by optimizing the crosslinkingconditions.
배영환,공다정,이소희,여상영 한국섬유공학회 2020 한국섬유공학회지 Vol.57 No.5
Nonwoven fabrics are widely used as filter bags in dust collection facilities, which are industrial air pollution prevention facilities with high dust collection efficiency. The filter bag media is the most important factor that determines the performance of the pulse-jettype dust collection facility. In general, the materials used for filter bag media are polyester, nylon, and polypropylene fibers. Because of the effects of the operating temperature, meta-aramids and polyphenylene sulfide are used at a high temperature of around 200 °C, while glass fiber, polyimide, and polytetrafluoroethylene (PTFE) are used at an ultra-high temperature of approximately 260 °C. Among these, PTFE membranes show/exhibit excellent heat resistance, chemical resistance, non-adhesiveness, and filtration efficiency. Despite the advantages of these fibers, there are no studies on the preparation and properties of filter bag media mixed with meta-aramid staple and PTFE fibers. Therefore, in this study, expanded PTFE filaments were processed into staple fibers to enable carding; mixed with meta-aramid staple fibers by ratio to form the upper and lower webs; and then applied with a PTFE and aramid scrim. The filter bag media was manufactured through a needle punching process and finishing. The air permeability, pore size, tensile strength, filtration performance, and durability of the prepared mixed filter bag media were evaluated. The results show that the prepared low differential pressure filter bag media had improved heat resistance and durability, while maintaining the 100% dust collection efficiency of the existing aramid medium.