• 한국의류산업학회지
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• 제19권4호
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• pp.515-522
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• 2017

The natural dyeing industry has been faced with increasing demands of constant needs for environmentally and body friendly clothing products among modern consumers. Natural dyeing has attracted attention as a next-generation technology in green textiles. Dyestuffs need to be diversified for technological development activation in order to meet the increasing demands for natural dyeing. This study extracted dyeing solutions from the leaves of the Rose of Sharon (the national flower of South Korea) and investigated its dyeing properties for the development of various natural dyestuffs. This study investigates the dyeability of silk fabrics with Rose of Sharon leaves extract. Optimal conditions for dyeing of silk fabrics with the extract of Rose of Sharon were $40^{\circ}C/80min$ and $90^{\circ}C/60min$ with 100% concentration. Looking at the results, it showed the best K/S value at pH3, Sn pre-mordanting and Fe post-mordanting. Color fastness to washing, dry cleaning, rubbing and perspiration was good at grade 4-5 or 4. However, light fastness was observed in grade 2. In aspect of functional property, it showed an excellent result of 90% deodorization rate. In addition, its proven functionalities (deodorant properties) will help to produce high value added environment-friendly products. Those findings demonstrate the possibilities of the Rose of Sharon as an environment-friendly dye.

• 대한화학회지
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• 제40권3호
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• pp.209-215
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• 1996

Fluorane계 색소는 감압 감열 기록용 색소로서 광범위하게 사용되고 있다. Bamberger 반응에 의해 중간체를 손쉽게 합성할 수 있는 법을 개발했으며 이를 이용해 Fluorane 색소를 고수율료 합성할 수 있었다. 또한 이들 Fluorane계 색소의 전기 변색특성에 관해서도 조사했다. ODBⅠ, Ⅱ는 전압 인가에 의해 각각 흑색과 적색의 색상을 나타냈으며 전압 off에 의해 재빨리 무색상태로 소색됨을 알 수 있었다. 합성한 ODBⅠ, Ⅱ의 소색반응은 1차 반응에 따르고 있으며 소색속도에 있어서는 빠른 소색속도 상수 $k_1$과 늦은 소색속도 상수 $k_2$가 관찰되었다.

• 한국잠사곤충학회지
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• 제26권2호
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• pp.26-31
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• 1984

In general, acid dyes been used for silk dyeing, but acid dyed silk shows weakness in color fastess, To improve this defect, the silk dyed with Acid Mordant Blue 13 was treated with chromes salts solution. Some mechanical properties and dyeing behaviors of the chrome mordant with dyed silk fabric were tested in this work. The tensile strength of silk fabric treated with chrome salts solution was decreased as the duration of treatment was increased. The mean rate constant (K) of photo-degradation was 1.019, and 1.047 after treated with Cr (III) and Cr (Ⅵ), respectively, whereas it was 1.304 in untreatment. The washing fastness of silk fabric also was improved by treatment with mordant and it was 3rd-4th grade and 4th grade when silk was treated with Cr (III) and Cr (Ⅵ), respectively, while untreatment gave 1st grade. The colour of dyed silk fabric was 2.5RP.3/10, but it was 5PB.4/3 and 5PB. 4/4 when the silk fabric was treated with Cr (III) for two hours and with Cr (Ⅵ) for one hour at 90$^{\circ}C$, respectively.

• 한국산학기술학회논문지
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• 제21권12호
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• pp.23-32
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• 2020

본 연구는 PTT에 vat 염료의 염색성을 살펴보고, vat 염료로 염색된 PTT의 취화거동 및 퇴색거동을 연구하였다. PTT 소재에 vat 염료의 염착을 개선하기 위하여 pad-steam 법을 응용하였으며, 염색 중에 산 처리 효과를 살펴보았다. 염색 과정에서 산 처리는 vat 염료의 입자 크기를 작게 만들어 소재 내부 침투를 용이하게 하고 염료의 과환원을 방지하여 염색성을 향상시켰다. 여기에 pad-steam 염색법은 일반적인 침염법보다 염료의낯 고착성을 증가시켜 균염을 개선하였다. Vat 염료로 염색된 PTT의 취화와 퇴색거동은 열과 자외선에 일정시간 동안 노출시킨 후 인장강도와 K/S 값으로 분석하였다. 열과 자외선의 온도가 올라갈수록, 또 노출 시간이 증가할수록 시료의 인장강도 저하되었으나, 이러한 취화 속도는 산화방지제와 함께 분산염료로 염색된 시료보다 더 느리게 나타나서 향상된 거동을 보였다. 퇴색거동 역시 vat 염료로 염색된 시료가 자외선흡수제가 포함되고 분산염료로 염색된 시료보다 훨씬 뛰어난 특징을 나타냈다. 결과적으로 vat 염료는 pad-steam 법으로 PTT 소재에 효과적으로 적용시킬 수 있으며, 이때의 내열성과 내광성은 우수하게 나타났다.

• 한국염색가공학회지
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• 제8권3호
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• pp.36-51
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• 1996

In order to investigate the degradation behavior of PET fabrics, sodium diethylene glycolate (SDEG)-diethylene glycol (DEG) solutions were prepared and PET fabrics were treated in the solution. The dissolution rate constant and apparent activation energy of the PET fabrics were calculated by Eyring's and Arrhenius's equation respectively and measured dyeing properties, moisture and antistatic properties. Then compared SDEG-treated fabrics with NaOH-treated. The results were as follows; 1. PET fabrics decreased their weight in SDEG-DEG solution, and the decreasing rate showed a linear relationship to the treating time at constant temperature and concentration of SDEG-DEG solution. 2. The dissolution rate constant showed a linear relationship to the concentration of SDEGDEG solution and an exponential relationship to treating temperature. 3. Apparent activation energy of dissolution was 23.45 kcal/mol. 4. The K/S values and the ΔL values of fabrics treated with SDEG-DEG solution are higher and lower respectively than fabrics treated with NaOH. 5. SDEG-DEG solution treatment improved fabric's moisture regain and it reached almost maximum at about 40% weight loss. 6. In the both reagent the light, wet and sublimation fastness of fabrics are similar. 7. SDEG-DEG solution gave more electrical discharge effect to the fabrics than that of NaOH. 8. NaOH treated PET microfiber have crater-like surface, while SDEG-DEG solution give bathochromic effect to the PET microfiber because which has wrinkles on the surface.

• 한국염색가공학회지
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• 제13권6호
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• pp.33-33
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• 2001

The physical properties and the dyeability of the easily dyeable polyester yarn(EDY) were investigated and compared with those of regular polyester (REG-PET). The EDY, copolymerized with small amount of polyethylene glycol(PEG), showed higher intensity of aliphatic CH peak in IR spectrum, lower density and lower compactness than those of the REG-PET from the analysis of IR, density gradient column and XRD respectively. In the physical properties, the EDY has lowers $T_g,\;T_m$, specific stress and initial modulus, and also has higher strain than that of the REG-PET. The EDY can be dyed under atmospheric pressure and its dyeing rate was faster than REG-PET due to low $T_d$, and this seems to be caused by the increased flexibility of Polymer chain in amorphous region of the EDY due to the copolymerization of PEG.ns being within the experimental error, the average values of lifetim.
$\tau$(t) are taken for further calculations. Rate constants such as Stern-Volmer quenching constants K$_{sv}$, quenching rate parameters k$_q$ and k''$_q$, static quenching constant V and kinetic distance r are determined using the modified Stern-Volmer eq.
tion and sphere of action static quenching model. In order to see whether the reactions are diffusion limited, equations k$_q$ = e$^{-Eq/RT}$ and k''$_q$ = e$^{-Eq/RT}$ are used to determine the values of E$_q$ and E''$_q$, the activati.
energies for collisional quenching and the values of E$_q$ are 14.53, 17.28 and 16.20 kJ mole$^{-1}$ for MPNO1, MPNO2 and 2-PI respectively and the values of E''$_q$ are 14.62 and 17.73 for MPNO1 and MPNO2 respectively. From the magnitudes of various quantities it has.
een concluded that the reactions are diffusion limited and the observed positive deviations in the S-V plot are due to static and dynamic quenching.