• Journal of the Korean Society of Clothing and Textiles
• /
• v.33 no.2
• /
• pp.256-265
• /
• 2009

The purpose of this study is to check color change, color fastness, increase wt., antibiosis, and UV-protection efficiency depending on gallnut concentrations and mordanting methods, when silk fabrics dye with gromwell according to pH. This results will contribute in developing of natural mordant with multi function. The results are as follows. ${\lambda}_{max}$ of Gallnut extracts was near 299 nm. When gallnut was used as a mordant, at all pH levels, pre-mordanted fabrics had red color and post-mordanted ones had red-purple color which was closed to natural color of gromwell. Brightness of post-mordanted fabrics was higher than that of pre-mordanted fabrics. In the case of chroma, pre-mordanted fabrics was higher than post-mordanted fabrics. There was no significant difference of color, brightness, and chroma depending on gallnut concentration. As mordanting concentration increased, fabric weight gradually went up and increase weight reached maximum $17{\sim}19%$. At all pH levels, color fastness improved by pre-mordanting and post-mordanting, and it showed the maximum $4{\sim}5$ grade of wet fastness and 5 grade of dry cleaning. Antibiosis of silk fabric was improved by gromwell dyeing and synthetic tannin mordanting. Antibiosis of gallnut extracts was excellent. The color fastness and antibiosis were preserved after 10 cycle dry cleaning. UV-protection efficiency was excellent by dyeing with gromwell and mordanting with gallnut.

• The Research Journal of the Costume Culture
• /
• v.18 no.2
• /
• pp.371-381
• /
• 2010

The pine needles can be used for four seasons in normal living and it can be taken friendly everywhere as it is distributed over 50% in Korea. The pine needles consist of vitamins, protein, minerals, essential oil and enzyme related to antimicrobial activity. It has effect like high blood pressure, neuralgia and hanged over by terpene, glucokinin, rutin, apigenic acid and tannin. Also the extract of them can be used for dyeing of fabrics. However, the extract components and effects of them are not well known yet. Therefore, the purpose of this study was to investigate the volatile components of the pine needles extract and functionality. The pine needles extract was dyed into various fabrics(nylon, silk, wool and soybean) and mordanted with Al, Cu, Cr, Fe and Sn. The extracted aroma compounds were compared by gas chromatography-mass spectrometry. The major volatile compounds of pine needles verified by using SPME were alpha-pinene, beta-pinene, beta-phellandrene, caryophyllene, ethanon, benzen. A total of 15 compounds were identified by using the SPME fibers. In the UV-visible spectra, the maximum absorption of wavelength of the pine needles ethanol extract appeared at 460, 630nm for chlorophyll component and at 237, 281nm for tannin component with the pine needles distilled water extract. Most of sample showed high antibacterial effect in none mordant but wool fabric showed high antibacterial effect in mordants. The result of UV block test showed a superior ability of blocking ultraviolet ray infiltration in all sample.

• Journal of the Society of Cosmetic Scientists of Korea
• /
• v.49 no.3
• /
• pp.247-258
• /
• 2023

This study aims to investigate the enhancement of water resistance and improvement in adhesion to the skin by combining dextrin palmitate and isopropyl titanium triisostearate coating materials with titanium dioxide. Due to the recent increase in consumers who enjoy outdoor activities, the demand for sunscreen with excellent water resistance is increasing. Prior research was conducted with O/W, Pickering, and W/O/W multiple formulations, but there was a limit to water resistance. The purpose of this study is to develop a complex inorganic powder that can improve water resistance and increase adhesion to the skin to solve this problem. First, we combined dextrin palmitate and isopropyl titanium triisostearate coating materials to form a composite with titanium dioxide. The coating of the inorganic powder was confirmed using FE-SEM and FT-IR analysis. The composite exhibited significantly higher in vitro water resistance compared to other formulations. The hydrophobicity of the coated inorganic powder was compared by measuring the contact angles. When the coated inorganic powder was applied to the W/O sunscreen formulation and the non-coated inorganic powder was applied to the W/O sunscreen formulation as a control, the SPF of the sunscreen containing the coated inorganic powder was higher. These results were the same when observed with a UV camera. Finally the adhesion of the coated inorganic powder to the skin was assessed by applying it to a foundation product. In vivo study, it was observed that the product formulated with the coated powder exhibited less smudging compared to the foundation product formulated with the non-coated powder. The developed inorganic powder in this study demonstrated excellent adhesion to the skin, providing a superior sensory experience, as well as enhanced hydrophobicity and remarkable water resistance effects. In the future, the result of this study is expected to help develop various sunscreen products to improve water resistance.

• Proceedings of the Korean Vacuum Society Conference
• /
• 2015.08a
• /
• pp.124.2-124.2
• /
• 2015

최근 에너지 효율을 향상시키고 감성과 기능성을 동시에 만족시킬 수 있는 스마트 윈도우 (Smart Window) 기술이 큰 주목을 받고 있다. 신개념의 하이브리드형 열선차단 코팅기술로 고투명, 고단열 등 복합기능을 가지고 있음. 4계절 변화가 뚜렷한 대한민국 실정에 가장 적합하여 건축물의 냉 난방 에너지를 최소화하는데 크게 기여할 것으로 기대된다. 단열필름 제조 방식에는 보급형 필름으로 염료 방식, 금속 방식 등이 있고 고성능 필름에는 나노 세라믹 방식과 스퍼터 방식+세라믹 방식을 융합한 필름(스퍼터 IR 필름)이 있다. 본 연구에서는 DC pulse sputter를 이용하여 고굴절율 물질인 TiO2와 저굴절률 물질인 SiO2를 적층으로 성장시켜 단열 스마트필름을 제작해 보았다. 높은 가시광 투과율과 IR 차페 성능을 확인하였고, 제작한 스마트필름을 또다른 윈도우 기술에 적용하는 연구를 진행하였다.

• Proceedings of the Korean Fiber Society Conference
• /
• 2007.11a
• /
• pp.277-278
• /
• 2007

• Journal of the Korean Applied Science and Technology
• /
• v.29 no.2
• /
• pp.286-294
• /
• 2012

This study is a review paper on powders for makeup cosmetics. They play the roles of the camouflage of skin defect, UV screening, skin adhesion, makeup sustainability, and skin protection. This function is endowed on the powders by shape control, surface treatment, and encapsulation. The future powders are expected to be evolved into the smart model responding to the environmental change.

• Proceedings of the Korean Vacuum Society Conference
• /
• 2014.02a
• /
• pp.341.2-341.2
• /
• 2014

산화물 반도체는 가시광선 영역인 380~780 nm 부근에서의 투과율이 80% 이상이고, 3.2 eV 이상의 band gap과 높은 mobility를 가지는 물질로서 투명한 스마트 창호필름이나 디스플레이에 유망한 물질로 연구되고 있다. 본 연구에서는 스마트 윈도우에 적용되는 높은 가시광 투과율과 적외선 차단을 위한 필름개발을 목적으로 산화물 반도체인 $TiO_2$ 물질을 RF Sputter를 이용하여 상온에서 박막성장을 하였다. Glass와 PET 위에 동시에 성장시켜 각각의 기판에 성장된 $TiO_2$ 박막의 물리적인 성질 등을 조사하였다. 측정은 Ellipsometry를 이용하여 광학적인 두께와 굴절률을 조사하였고 UV visible spectrometer를 통해 광학적인 투과도를 확인하였다. 100Watt 부터 RF power를 높여가며 Working Pressure 변화변 주었을 때 낮은 RF power와 Working Pressure에서 높은 가시광 투과율을 확인 할 수 있었다.

• Proceedings of the Korean Vacuum Society Conference
• /
• 2011.08a
• /
• pp.233-233
• /
• 2011

건물 내부의 에너지 효율을 높이기 위해 창호의 단열 효율을 높이는 연구가 최근 큰 주목을 받고 있다. 특히 고굴절률과 저굴절률의 소재를 이용한 다층 박막 구조를 형성하여 높은 광투과율을 유지하면서도 적외선 에너지를 선택적으로 차단하는 창호의 연구가 이루어지고 있다. 본 연구에서는 고굴절률 특성을 가진 TiO2박막을 이종 금속 이온을 sol-gel법을 이용해 첨가 복합화한 후 유리 기판에 스핀 코팅후 열처리하여 성막하였다. 생성된 막은 atomic force microscopy (AFM), 전계 방출 전자현미경, UV-vis를 이용해 각각의 금속 이온에 대한 박막 표면의 형상 변화와 광학적 특성 변화를 확인하였다.

• Proceedings of the SCSK Conference
• /
• 1992.09a
• /
• pp.46-68
• /
• 1992

To investigate the effect on the antimicrobial activity against S.aureus ATCC 6538, E.coli KCTC 1039 and cell toxic level against transformed mouse fibroblast L929 in formula added with various concentrations of UVB blockers commonly used in cosmetic products, these experiments were carried out by preservative efficacy testing methods and in vitro cytotoxicity methods. The results obtained were as follow ; 1) Octyl Dimethyl PABA had a broad antibacterial spectrum against the Gram (+) and the Gram(-) bacteria at 5.84 % concentration, but not Octyl Methoxycinnamate. 2) Antibacterial activity was decreased in a combined UVB blocker system of squalane base. Especially, Octyl Dimethyl PABA was inactivated by Octyl Methoxycinnamate at 5.84% concentration to a large extents , but not 4-Methylbenzylidene Camphor. 3) Within in vitro cytotoxicity by use of mouse fibroblast L929 on UV-B blockers, NR assay was more excellent than MTT assay on quantitative

• Proceedings of the Korean Institute of Surface Engineering Conference
• /
• 2007.11a
• /
• pp.33-34
• /
• 2007

DLC를 포함한 탄소 박막은 우수한 특성으로 인해 세계적으로 많은 연구들이 진행 되고 있다. 본 연구에서는 탄소 박막의 산소 및 수분 차단 특성 및 광투과율의 특성과 플라즈마 변수와의 상관관계를 규명 하고자 하였으며, 이러한 상관관계를 Langmuir probe, UV-spectroscopy, MOCON 의 분석기구를 통하여 플라즈마 변수와 박막의 특성을 분석 하였으며, 수분 투과도는 4g/m$^2$/day까지 감소하는 결과를 얻었다.