http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
폴리카보네이트 폴리올/바이오 폴리올을 이용한 습식 인조피혁용 폴리우레탄의 제조 및 물성
서석훈,고재왕,최필준,이재년,이영희,김한도,Sur, Suk-Hun,Ko, Jae-Wang,Choi, Pil-Jun,Lee, Jae-Yeon,Lee, Young-Hee,Kim, Han-Do 한국청정기술학회 2019 청정기술 Vol.25 No.2
The synthesis of bio polyol from renewable resources has attracted attention in recent years. In particular, it is important to take advantage of bio polyols in the synthesis of polymers. In this study, a series of dimethylformamide (DMF) based polyurethanes were synthesized using polycarbonate polyol/bio polyol (PO3G: polytrimethylene ether glycol prepared from 1, 3-propanediol produced by fermentation from corn sugar), methylene diphenyl diisocyanate (MDI) and 1,4-butandiol (BD). The properties of prepared polyurethane films and the cell structure of wet type artificial leather were investigated. As the bio polyol content increased, the tensile strength of polyurethane films decreased, however, the elongation at break increased significantly. As a result of thermal characteristics analysis, the glass transition temperature of polyurethanes increased when increasing the content of polycarbonate polyol. As a result of comparing the cell characteristics of wet type artificial leathers prepared in this study, it was found that the number and uniformity of cells formed in the artificial leather samples increased when increasing the content of polycarbonate polyol in polycarbonate polyol/bio polyol. From these results, it was found that DMF-based polyurethane containing an appropriate amount of bio polyol could be used for wet type artificial leather. The bio textile analysis system according to ASTM standard was used to measure the bio carbon content of polyurethane. The content of bio carbon increased proportionally with the increase of bio polyol content used in polyurethane synthesis. 최근 재생자원으로부터 바이오 폴리올을 합성하는 것이 주목을 받고 있다. 특히 고분자의 합성에서 이러한 바이오 폴리올을 활용하는 것은 대단히 중요한 과제이다. 폴리카보네이트 폴리올/바이오 폴리올(PO3G: 옥수수 당의 발효에 의해 제조된 1,3-프로판 디올로부터 제조된 폴리트리메틸렌 에터 글리콜), 메틸렌디페닐디이소시아네이트 및 1,4-부탄디올을 사용하여 일련의 디메틸포름아미드(DMF) 기반 폴리우레탄을 합성하였다. 본 연구에서는 폴리우레탄 필름의 특성과 습식 인조피혁의 셀(cell) 특성을 조사하였다. 폴리카보네이트 폴리올/바이오 폴리올에서 바이오 폴리올의 함량이 증가할수록 폴리우레탄 필름의 인장강도는 감소하지만 연신율은 증가하였으며, 유리전이온도는 낮아짐을 알 수 있었다. 또한 습식공법에 의한 인조피혁 단면을 분석한 결과 폴리카보네이트 폴리올 함량이 증가함에 따라 인조피혁에 형성된 셀의 수와 균일성이 증가함을 알 수 있었다. 이 결과로부터 적정량의 바이오 폴리올을 사용한 DMF 기반 폴리우레탄의 경우에 충분히 인조피혁에 사용할 수 있음을 알 수 있었다. 바이오 탄소 함량은 폴리우레탄의 제조에 사용한 바이오 폴리올의 함량 증가에 따라 비례하여 증가하였다.
유연쇄를 사용한 개질 폴리에스터 공중합체의 제조와 그 특성(II) -Neopentyl glycol 단위체를 함유한 공중합 폴리에스터의 결정화 거동-
손태원,한송정,고재왕,이건민,Son, Tae-Won,Han, Song-Jung,Ko, Jae-Wang,Lee, Gun-Min 한국섬유공학회 2009 한국섬유공학회지 Vol.46 No.6
Poly(ethyleneterephthalate)(PET) was chemically modified through copolymerization of bis(2-hydroxyethyl) terephthalate (BHET) and neopentyl glycol (NPG). NPG was used as flexible chain moiety to enhance spinnability by retarding the stress-induced crystallization during spinning. The properties of the copolyester were investigated by using GPC, DSC(differential scanning calorimetry), TGA(thermogravimetry analysis), and $^1H-NMR$. From the result of GPC, it was found that the copolyesters were able to get higher molecular weight and narrower molecular weight distribution than those of PET obtained from BHET alone. Non-isothermal crystallization behavior of the copolymers was investigated by differential scanning calorimetry (DSC). Non-isothermal crystallization measurements showed that, with increasing the amount of comonomer, Tcm decreased.. It seems that the rate of crystallization of copolymer might be retarded during melt-spinning. Isothermal melt-crystallization measurement demonstrated that the rate of crystallization and the Avrami index were reduced with increasing the amount of comonomer.
PET/co-PET 해도형 초극세사 트리코트의 알칼리 감량 가공에 따른 물성 및 특성 평가
이지은,김민석,김민구,고성익,정대호,고재왕,이승걸,Lee, Ji Eun,Kim, Min Seok,Kim, Min Gu,Ko, Seongik,Jung, Dae Ho,Ko, Jae Wang,Lee, Seung Geol 한국섬유공학회 2018 한국섬유공학회지 Vol.55 No.5
Artificial leather has been developed as a substitute for natural leather because of the high demand for high-quality products in automobile interiors and the living leather market. Artificial leather is generally manufactured using microfiber nonwoven fabric. In this study, we analyzed the weight loss behavior of PET/co-PET ultra-microfiber by alkali hydrolysis according to NaOH concentration (10-30% o.w.f.), treatment time (5-60 mins), and treatment temperature ($80-120^{\circ}C$) by scanning electron microscopy (SEM), differential scanning calorimeter (DSC), and mechanical analysis. We found that the optimum condition for alkali hydrolysis is 25% NaOH o.w.f. aqueous solution with a treatment time of 30 min at $100^{\circ}C$.
황화염료를 이용한 나일론 인공피혁 스웨이드의 연속공정 기반 염색 특성 연구
이민주,이정훈,김민석,정대호,이미경,고재왕,이승걸,Lee, Minju,Lee, Jeong Hoon,Kim, Min Seok,Jung, Dae-Ho,Lee, Mikyung,Ko, Jae Wang,Lee, Seung Geol 한국섬유공학회 2018 한국섬유공학회지 Vol.55 No.2
Nylon-based artificial suede is widely used in textile fabrics owing to its various potential applications such as automotive, sports and leisure, and industrial. It is also known that nylon-based artificial suede is an excellent substitution for natural leather. To substitute natural leather, it is necessary to understand the proper method for dyeing the substitute materials for value addition. However, in general, a large amount of wastewater can be generated by the dip-dyeing method, which increases the cost of the dyeing process. Hence, in this study, we investigated the optimum dyeing conditions of nylon-based artificial suede with sulfur black dye by a continuous process. We found that the optimal conditions were a reduction temperature of $70^{\circ}C$, retention time of 60 s, dye concentration of 30 % o.w.f., reducing agent concentration of 9 g/l, pH of 8.5, and a pad-steam temperature of $100^{\circ}C$ with 15 min of pad-steam followed by a wash with $H_2O_2$. Meanwhile, colorfastness against washing, light, and perspiration for the nylon-based artificial leather in the range of 4 to 5 grades was achieved.