• 한국농촌생활과학회지
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• 제10권1호
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• pp.1-6
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• 1999

Dyeing and discoloration effects on the fabrics of cotton, silk and rayon with unriped persimmon juice were investigated. Color of dyed fabrics treated with persimmon juice only, added 3% tartaric acid or 3% aluminium sulfate was not different each other. Dyeing assistants such as tartaric acid or aluminium sulfate were effective on the prevention from discoloration of dyed fabrics and ultraviolet rays. Discoloration were supposed to derive from tannin in unriped persimmon, ultraviolet rays, oxygen, enzyme and so on, ultraviolet rays at wavelength of 253.7nm was the most active the chromatophores and discoloration. The fabrics could be dyed, when unriped persimmon juice was store at low temperature or freezing.

• 한국염색가공학회지
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• 제4권3호
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• pp.82-90
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• 1992

To optimize the foam dyeing procedures for polyester and polyester/nylon blended non-woven fabrics, the effects of organic solvents and surfactants were investigated by measuring the foam heights and surface tensions of the foam dyeing solution. The results of the experiments can be summarized as follows: 1) Organic solvents and surfactants (sodium lauryl sulphate: SLS) solution lower the surface tension (ST) of the water, but ST lowering rate of SLS solution is greater than that of solvents. For a 0.25% SLS solution, the minimum surface tension was 30.3 dyne/cm, which is nearly the same value for organic solvents. 2) For 0.25% SLS solutions, additional adding of a 4.0% organic solvent makes the foam height (FH) be its maximum. 3) At 0.6 g/ι dye concentration, incorporation of 0.4% SLS makes the surface tension of the foam solution be its minimum. The foam height did not show any trend due to the dye type. 4) The effect of foam stabilizers (sodium alginate (Alg-Na) and hydroxy ethyl cellulose (HEC)) were also investigated. The foam height of the foaming solution with HEC was greater than that with Alg-Na. The foam stability of the foaming solution with Alg-Na was better than that with HEC.

• Korean Chemical Engineering Research
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• 제49권1호
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• pp.56-61
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• 2011

Methyl vinyl ether, propyl vinyl ether, isopropyl vinyl ether, butyl vinyl ether 그리고 isobutyl vinyl ether 등의 alkyl vinyl ether는 화학 및 의약산업에서 용매와 합성중간체로 널리 사용된다. 최근 들어 alkyl vinyl ether는 고분자 전해질막 연료 전지에 대한 원료와 셀룰로오스의 염색가공에 선호되나, 공정 및 운전변수의 최적화를 위한 alkyl vinyl ether계의 혼합물성은 극히 일부가 보고되고 있고, propyl vinyl ether(PVE)에 대한 상평형과 물성 데이터는 거의 알려진 바가 없다. 따라서 본 연구는 {PVE + ethanol + benzene} 삼성분계 333.15 K에서 기액평형을 headspace gas chromatography (HSGC)을 이용하여 측정하였고 Wilson, NRTL 및 UNIQUAC 식에 상관시켰다. 또한 삼성분계를 구성하는 혼합물성으로써 {PVE + ethanol}, {ethanol + benzene} 그리고 {PVE + benzene}계에 대한 과잉부피($V^E$) 및 굴절율 편차(${\Delta}R$)를 303.15 K에서 측정하였다. 측정된 이성분계 혼합물성은 Redlich-Kister 다항식을 이용하여 매개변수를 상관시켰으며, 이를 이용하여 Radojkovi 식으로 삼성분계 혼합물성을 예측하였다.