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전해수를 이용한 정련성에 관한 연구(I) - Polyester/Cotton Knit-
이권선,이범수,박영환,김성동,정성훈,오명준 한국섬유공학회 2004 한국섬유공학회지 Vol.41 No.3
Recently, the emphasis is put on the impact of chemical substance such as the environment hormone material. The question is also being given to the use of surfactants with molecular structures such as nonylphenol, etc. Fundamental and prudent consideration is required in the use of synthesis organic compounds. But textile pretreatment and dyeing process and overall textile manufacturing processes have a significant effect on the environment. Spinning oils, sizing agents, and fibrous scum removed in textile pretreatment, are discharged in wastewater. Also unfixed dye, unreacted additives and finishing agents such as acids, alkalis, etc after dyeing and finishing is included wastewater. In this research, environmental friendly technology using electrolyzed water was developed and introduced to scouring. Advantages of this technology are to reduce the amount of chemicals including surfactants. This technology has not been applied for textile manufacturing process. Equipments producing electrolyzed water were designed to produce 2 ton/day, 10 ton/day and 50 ton/day in order to apply to textile pretreatment process. The aim of this work was to study a scouring process using electrolyzed water and the possibility of reducing scouring agent and NaOH. PET/cotton knit were scoured with scouring agent, NaOH, and water electrolyzed at various electrical currents and production speeds. The scouring process using electrolyzed water can reduce treatment costs and pollution.
박종호,이권선,고준석,배진석,김성동,Park Jong Ho,Lee Kwon Sun,Koh Joonseok,Bae Jin-Seok,Kim Sung Dong 한국섬유공학회 2005 한국섬유공학회지 Vol.42 No.5
Disperse dyes derived from heterocyclic compounds such as pyridone, diaminopyridine, carbazole, and 2-phenylindole, have been known to possess high light fastness. Four heterocyclic azo disperse dyes were synthesized by using three diaminopyridines and 2-phenylindole as coulping components and their dyeing and fastness properties were compared with an aminoazobenzene disperse dye. The wavelengths of maximum absorption of the synthesized heterocyclic dyes were in the range of 508-528 nm. The molar extinction coefficients of dyes having diaminopyridine were higher than that of an aminoazobenzene disperse dye. The dyes derived from aminopyridine having phenyl group exhibited poor to moderate build-up compared to the aminoazobenzene dye. Wash, light, heat and rubbing fastnesses of heterocyclic azo disperse dyes were good to excellent. The light fastness was improved by 0.5-1 grade by the addition of a UV absorber.
테레프탈산으로부터 합성한 알칼리 수용성 분산염료의 염색성과 견뢰도에 관한 연구
박종호,이권선,김성동,Park Jong Ho,Lee Kwon Sun,Kim Sung Dong 한국섬유공학회 2005 한국섬유공학회지 Vol.42 No.1
Dyeing and fastness properties of alkali-clearable disperse dyes of diester type, which were synthesized using diazo components derived from terephthalic acid, have been studied. They had good build-up properties and showed high exhaustion on regular polyester fiber. Washing and abrasion fastnesses of dyed polyester fabrics were excellent due to the solubility of the dyes in alkaline solution. Increase in molecular weight by introducing bulky sub-stituents to the dye improved sublimation fastness, while the addition of cyano group improved light fastness as expected. Fine denier polyester fabric dyed with the new disperse dye also exhibited excellent washing fastness. The newly synthesized dye barely stained cotton fiber, and gave good washing fastness of polyester/cotton blended fabric dyed by a one-bath dyeing method.
Poly(trimethylene terephthalate)/Cellulose 교편물의 전처리 및 염색에 관한 연구
정성훈,차용호,이권선,오태환,Jeong, Sung-Hoon,Cha, Yong-Ho,Lee, Kwon-Sun,Oh, Tae-Hwan 한국섬유공학회 2007 한국섬유공학회지 Vol.44 No.5
The effect of mercerizing, presetting and dyeing of single jersey poly(trimethylene terephthalate) (PTT)/cellulose knitted fabrics were carried out. Pre-treating, dyeing, and finishing conditions were optimized to make uniform PTT/Cellulose knitted fabrics. The optimum conditions of the PTT/Cellulose knitted fabrics for mercerization were 22.5 wt% NaOH, $20^{\circ}C$ and 23 m/min of tenter speed. A cold-pad-batch (CPB) dyeing method could minimize process problems of high tension and rubbing in comparison with an ordinary exhaust dyeing method. Fastness was the best when the fabric was dyed at temperature of $105^{\circ}C$ and for 40 min. We resolved a tailing problem of the CPB process by controlling tenter speed and temperature.
고준석,박종호,이권선,김성동,Koh Joonseok,Park Jong Ho,Lee Kwon Sun,Kim Sung Dong 한국섬유공학회 2005 한국섬유공학회지 Vol.42 No.6
The weight reduction properties and dyeing properties of sea-island type PET supermicrofiber were compared with those of normal sea-island type PET microfibers. The alkaline dissolution behavior of microfibers were monitored using a cationic dye staining method. The dye uptake of finer microfibers commences at lower temperatures and showed faster rate of dye uptake. The build-up and wet fastness properties of disperse dyes on finer microfbers were relatively poor since more dye was required to achieve a given depth of shade due to the large surface area. Also, the low temperature dyeing of microfibers produced higher color yield than normal high temperature dyeing because of less dye migration to the coarser fibers during dyeing.
Smeet Gala,심하나,Sook-Young Jeon,어윤재,이권선,권경우,배성윤 한국보건의료기술평가학회 2021 보건의료기술평가 Vol.9 No.1
Objectives: Due to the lack of an appropriate alternative vascular access device, peripherally inserted central catheter (PICCs) are used unnecessarily among patients who do not require longterm catheterization. Unnecessary use of PICCs can lead to catheter-related blood stream infections (CRBSIs) or other complications that pose a substantial clinical and economic burden on patients and healthcare systems. Introduction of midline catheters (MCs) provides a cost-saving option for patients who require mid-term catheterization. This study investigated the cost-difference of using MCs vs. PICCs following the inclusion of MCs on a reimbursement list in Korea. Methods: A costminimization analysis conducted from the healthcare system perspective compared the costs of device use, complications, and labor for MCs and PICCs in a Korean inpatient setting over a year. Clinical and cost inputs were obtained from literature searches and the Health Insurance Review and Assessment (HIRA) Service database. The base case assumed that MCs were not reimbursed and thus all patients received PICCs. The future scenario predicted total costs when MCs were reimbursed, leading to an increased use of MCs in clinical practice. Sensitivity analyses were conducted to identify key drivers of cost savings. Scenario analyses assessed cost savings when the estimated percentage of patients using MCs was altered in the model. Results: Introduction of MCs led to cost savings of KRW 9,374,456,648 over a year, attributed to lower device costs, lower rates of CRBSI, and shorter insertion time associated with MCs compared with PICCs. The mean duration of PICC insertion time, annual mean salary of healthcare professionals performing PICC insertions, and prevalence of CRBSI for PICCs were key drivers of cost savings. Cost savings were still observed when the percentage of patients receiving MCs was as low as 10% in the model. Conclusion: The availability of MCs presents a cost-saving option to patients who were receiving unnecessary PICCs for mid-term catheterization during hospitalization in Korea.