http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
환경친화형 수분산성 불소 아크릴레이트 공중합체에 의한 섬유 표면개질
유수용,김정두,문명준,서차수,주창식,이민규 한국환경과학회 2004 한국환경과학회지 Vol.13 No.10
Waterborne fluorinated acrylate copolymer (WFAC) for surface modification of textile was synthesized from perfluoroalkyl ethyl acrylate, octadecyl acrylate, glycidyl methacrylate, surfactant and 3,3 methyl-methoxy butanol. The structures of the synthesized WFAC were determinated by FT-IR and ^(19)F-NMR analysis. The thermal stability investigated with DSC and TGA was decreased with increasing the content of fluorinated acrylate in the copolymer. However, the particle sizes of WFAC were increased with increasing the content of fluorinated acrylate in the copolymer. The surface energies calculated by contact angles of WFAC were in the range of 29.80~3.41 dyne/cm. On the observing SEM of the textile surface treated with WFAC, the textile was swollen and compacted with increasing the concentration of water repellency agent. WFAC synthesized in this study showed a good water repellency.
유수용,이훈용,정원진,문명준,이민규 한국환경과학회 2002 한국환경과학회지 Vol.11 No.9
Waste paper cup was sulfonated to be used as ion exchanger. Removal characteristic of copper and lead ion by prepared ion exchanger was investigated. The sulfonation was conformed by the high intensity band of SO_3H group around 1100∼1160㎝^-1. The synthesized ion exchanger had greater removal ability for copper and lead ion than the original waste paper cup. Ion exchange system reached the final equilibrium plateau within 30min. The maximum removal capacities (q_max) were calculated as 9.79㎎/g for copper and 15.95㎎/g for lead, respectively. The affinity of lead based on a weight was higher than that of copper. The ion exchange phenomena appeared to follow a typical Freundlich isotherm.
김정두,유수용,문명준,이민규 한국공업화학회 2005 응용화학 Vol.9 No.1
Waterborne fluoroacylic/polyurethane composite dispersions were prepared by emulsion polymerization. Polyurethane containing hydrophilic groups previously prepared by step growth polymerization and this was dispersed with fluoroalylic monomer and other monomers in water. The structure of the composite were confirmed by using ATR-FTIR. The surface and film properties of the composites were investigated by the measurement of contact angle, surface free energy, DSC, and TGA and these properties were compared with those of physical polymer blends. As the amounts of Perfluoralkyl ethyl acrylate(FA) emulsion was increased from 0 wt% to 20 wt%, the surface energy was dramatically decreased from 37.54 dyne/cm to 14.22 dyne/cm. But little change of the contact angle observed in the amount of the FA emulsion up to 20 wt%. The results showed the advantages of the composite dispersions over the physical polymer blends.
전분 충전 아크릴레이트 필름의 α-Amylase에 의한 생분해
김정두,유수용,감상규,주창식,이민규 한국환경과학회 2004 한국환경과학회지 Vol.13 No.9
The biodegradability of vinyl acetate acrylate resin and corn starch blend was studied by determination of the reduced sugars produced after enzymatic hydrolysis. The starch hydrolysis reaction by a-amylase was achieved within 5 minutes. Optimal ranges of temperature and pH for the starch hydrolysis by a-amylase were around 80 ℃ and 6.5-7.2, respectively. The biodegradability of the starch-filled acrylate films increased as the content of starch increased. The biodegradation of starch in the starch-filled acrylate film by a-amylase was about 48.6% of that of pure starch. This value of biodegradable starch-filled acrylate film gave a good result with enzymatic shortcut test. The surface morphologies of the starch-filled acrylate film after enzymatic hydrolysis were investigated by scanning electron microscopy (SEM).
합성 Goethite에 의한 인산이온, 황산이온 및 구리이온의 흡착 특성
김정두,유수용,문명준,감상규,주창식,이민규 한국환경과학회 2003 한국환경과학회지 Vol.12 No.9
Adsorption of phosphate, sulfate, and copper ion to goethite was investigated. Goethite was prepared in the alkaline solution. In the single adsorbate systems, the final equilibrium plateau reached within 20 min. The adsorption isotherms of the individual ions could be well described by the Langmuir equation. The maximum adsorption capacities (q_(max)) were calculated as 0.483 mmol/g and 0.239 mmol/g at pH 3 for phosphate and sulfate ion, and 0.117 mmol/g at pH 6 for copper ion, respectively. In competitive adsorption system with phosphate and sulfate, phosphate ion was a stronger competitor for adsorption on goethite than sulfate ion, which was consistent with higher affinity of phosphate ion for the surface compared to sulfate ion. The existence of sulfate ion enhanced the adsorption of copper ion but the adsorption of sulfate was inhibited when copper ion was present.