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Chito-oligosaccharide로 처리된 면직물의 반응성 염료에 대한 염색성
장진호,신민승,성하수,고석원 한국섬유공학회 1999 한국섬유공학회지 Vol.36 No.6
Large amount of salt and alkali is usually added to dyebath in the conventional reactive dyeing of cotton due to the low substantivity of reactive dyes to cotton, hence resulting in high discharge levels of dyes as well as salt and alkali. This study intends to increase the interaction between the dye and cellulose fiber by incorporating amine groups to the fiber using a chito-oligosacchride (COS). The COS was prepared by depolymerizing a chitosan, whose degree of deacetylation is 99.3%, with sodium nitrite. With increasing COS content in the cotton fabric, the amount of salt and alkali required for the dyeing was reduced significantly and at the same time higher K/S value was obtained compared with the untreated. Also the color fastness of COS treated cotton fabric were similar to those of the untreated fabrics.
충남지역 소규모점포의 실내․외 VOCs, 포름알데히드, 총부유세균 농도에 관한 연구
장진호,최지희,박명규,신민승,김윤재,장경벽,최진혁,이성찬,손부순 순천향대학교 기초과학연구소 2016 순천향자연과학연구 논문집 Vol.22 No.1
In this study, The Chungnam-Do it measured VOCs, HCHO and TBC consistency from the small-size shops of the part area. Air VOCs concentration in store, restaurant, department store and glasses shop is 307.22 ㎍/㎥, 245.34 ㎍/㎥, 426.58 ㎍/㎥ and 522.26 ㎍/㎥. Air HCHO concentration in store, restaurant, department store and glasses shop is 29.3 ㎍/㎥, 48.52 ㎍/㎥, 94.58 ㎍/㎥ and 38.38 ㎍/㎥. Air TBC concentration in store, restaurant, department store and glasses shop is 116.67 CFU/㎥, 66.44 CFU/㎥, 261.99 CFU/㎥ and 36.63 CFU/㎥.
Eco-friendly ADCA (azodicarbonamide) foam utilizing polymeric acid for reducing ammonia gas
조미연,김보현,김연욱,신민승,조용연,이강택,이선종 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Polymer foams are utilized materials for building materials, insulations and so on. However, these polymer foams release harmful gases such as ammonia, formamide during the foaming process. The releasing gases mainly from the azodicarbonamide (ADCA) blowing agents are regulated as SVHC (Substances of Very High Concern) because of the negative effects such as bad smell and respiratory diseases. This study suggests a new approach to produce eco-friendly foam that significantly reduces the ammonia gases. The foam added with polymeric acid is not only reduced the releasing ammonia gas up to 82% but also maintained the physical properties compared to the reference foam. From the SEM image, it is found that there is developed nanosized channel networks in the wall of pore. Consequently, we ascribe the reduction of ammonia gases through the polymeric acid and the easy discharging of gases through nano channel networks.