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도성국 東亞大學校 1998 東亞論叢 Vol.35 No.-
The dyeabilities of C. I. Reactive Blue 240 (R240, MW; 963.5) and C. I. Reactive Red 241 (R241, MW; 1135.5) were investigated. Initial dyeing rates were increased and the amount of dye on the fabric at equilibrium was decreased with temperature like other ordinary dyeing processes. Activation entropy(△S) was somewhat decreased because of loose bonding between dyestuffs and fiber molecules at transition state. It can be clarified that the entire reaction is exothermic and the number of molecular species at transition state becomes greater from decrease in activation enthalpy(△H) and the increase in activation free energy(△G) with temperature, respectively. Because of the bigger size of the dye molecule, the reaction rate of R241 was slower than that of R240.
중성염을 첨가하여 알칼리 가수분해한 PET 직물의 물성
도성국 東亞大學校 1995 東亞論叢 Vol.32 No.-
Poly(ethylene terephthalate) (PET) was hydrolzyed with aqueous solutions of many salts in alkali metal hydroxides under various conditions. Several physical properties were investigated and the photographs of scanning eletron microscope of the ethched surface of the hydrolysed PET were taken. Some conclusions obtained from the experimental results were summarized as follows. 1. No significant change was observed with different salts used. The physical properties of the hydrolysed PET were independent of the difference in kind of salts used. The tensile strength and the handle value were decreased with the increase in the weight less. The density and the degree of crystallinity of hydrolysed PET were decreased initially, after passing the minimum value, then increased to about the degree of the crystallinity of untreated PET. Added salts with greater positive effects on the hydrolysis etched fiber surface more severely, and the severeness was nearly agreed with the order of the acceleration effect of salts added. 2. It was thought that salts in aqueous NaOH solution accelearating the hydrolysis of PET would contribute to the conservation of energy and NaOH in the weight loss finishing process of PET fabric without further purchasing or equpping other facilities.
C.I.Reactive Blue 4의 견직물에 대한 염색 속도
도성국 東亞大學校生命資源科學大學附設 農業資源硏究所 1997 農業生命資援硏究 Vol.6 No.1
Dyeing kinetics of C.I. Reactive blue 4(B-4) on silk fabric was found in this experiment. Initial dyeing rates were increased and the amount of dye on the fabric at equilibrium was decreased with temperature like other ordinary dyeing processes. Activation entropy(ΔS*) was decreased because of loose bonding between dyestufffs and fiber molecules at transition state. It can be clarified that the entire reaction is exothermic and becomes unstable from the increase and decrease in activation free energy(ΔG*) and enthalpy(ΔH*) with temperature, respectively.
도성국,박찬헌 東亞大學校 大學院 2002 大學院論文集 Vol.27 No.-
Seven kinds of neutral salts with different cations and anions, LiCl, NaCl, KCl, CsCl, NaF, NaBr, and Nal, were added to the dye bath to accurately understand the effect of electrolytes on the reactive dyeing rate of silk with C.I. Reactive Black 5. The cations of salts added lowered the negative surface potential of the silk, improving equilibrium adsorption and the accessibility of the dyestuff to the fiber geatly and speeding up the dyeing rate in the order of Li^+>Na^+>K^+>Cs^+. The sodium cation lowered the negative surface potential of the silk and increased the dye-uptake on the fabric. However, because of the discrepancy in the anions' inhibition power form sodium lowering the surface negative potential the amount of the dye on the silk fiber was different from each other in the order of F> Cl >Br > I. For cations, the activation energy(E_a) of the dyeing was in the order of Li^+>Na^+>K^+>Cs^+but the activation free energy(ΔG^*), or the real energy barrier for the reaction, was in the order of Li^+>Na^+>K^+>Cs^+ because the degree of the contribution of E_a to the activation entropy(ΔS^*) was Li^+>Na^+>K^+>Cs^+. it was found form this result that LiCl had the strongest lowering effect on the negative surface potential of silk. The decrease in ΔS^* should be attributed to the loosely bonded activated complex of dyestufffs, cations and fiber molecules at transition state. For anions, the activation energy(E_a) of the dyeing was in the order of F>Cl >Br>I but the dye-uptake on the fabric and the activation free energy(ΔG^*) were in the order of F<Cl<Br<I because the strength of the interaction of the anions with sodium cations was the same as the order of the latter. In other words F exerted the weakest eletrostatic force on Na^+ force on Na^+ and competed with the dyestuff anions least of all. It was clarified from the Bro¨nsted equation that electrolytes had the ionic strength effect and the specific salt effect on the reactive dyeing.
C.I. Reactivre Orange 16의 견직물에 대한 염색속도
최진협,도성국 東亞大學校生命資源科學大學附設 農業資原硏究所 1996 農業生命資援硏究 Vol.5 No.1
Dyeing kinetics of C. I. Reactive Orange 16 on silk fabric was found in this experiment. Initial dyeing rates were increased and the amount of dye on the fabric at equilibrium was decreased with temperature likewise other ordinary dyeing processes. Activation entropy(ΔS*) was decreased because of loose bonding between dyestufffs and fiber molecules at transition state. It can be clarified that the entire reaction is exothermic and becomes unstable form the increase and decrease in activation free energy(ΔG*) and enthalpy(ΔH*) with temperature, respectively.
綿布에 대한 N-methylolacrylamide 處理의 效果에 관한 硏究
朴燦憲,都成國 東亞大學校附設基礎科學硏究所 1985 基礎科學硏究論文集 Vol.2 No.1
In order to improve the crease recovery and dyeing property of the cotton fabric, it was treated with Ν-methylolacrylamide (NMA). Several treating conditions, which include the concentration of NMA, curing temperature, curing time and concentration of catalyst(NH₄Cl), were varied. The acrylamidomethylated cellulose(AMC) fabrics treated with conditions above were dyed with acid dye(C.I. Acid Yellow99) containing nucleophilic group in alkaline bath. The crease recovery, handle value, color-difference and amount of dye of of dayd AMC were investigated. 1. The crease recoverry, handle value, amount of dye on the fabric and color difference are increased with increasing the concentration of NMA. 2. With the increase of curing temperature, the color-difference is increased, the maximum value of crease recovery is found at 140℃, and the handale value is decreased. 3. In accordance with the lapse of curing time, the crease recovery and the color-difference, however slightly over 6 minites, are increased, and the handle value is decreased. 4. The crease recovery, handle value, and color-differdnce are not varied remarkably by increasing the concentration of catalyst in aqueous NMA solution.