• Journal of the Society of Cosmetic Scientists of Korea
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• v.36 no.1
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• pp.47-55
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• 2010

UV-screening agents have some adverse effects that raise consumers' concern. The organic agents often cause irritation and may penetrate into human body while the inorganic agents raise aesthetic issues because they often turn opaque. Organic agents with high molecular weights and nano-sized inorganic agents have been developed respectively to minimize transdermal intrusion into human body and suppress turning opaque. Recently, we reported preparation of powdery UV-screening agents made of polysilsesquioxane, an organic-inorganic hybrid material. Powders would not penetrate into epidermis and organic-inorganic hybrid nature would suppress the opaqueness problem. In this study, we continued our research on this powdery polysilsesquioxane UV-screening agent, SESQUV, regarding its chemical composition, its synergic UV-screening effects when mixed with other organic agents, and its applicability in practical formulation. Results showed SESQUV was promising UV-screening agents useful in sunscreen formulation.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.10a
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• pp.187-188
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• 2000

최근 자외선 차단제의 사용이 증가하면서 자외선 차단제 도포로 인한 자극성 피부염, 접촉 피부염, 광알레르기성 또는 광독성 피부염 등의 보고가 증가하고 있어 피부에 자극이나 알레르기 반응, 독성을 나타내지 않는 적절한 천연소재 자외선 차단제의 개발에 대한 필요성이 증대되고 있다. 이에 본 연구에서는 새로운 자외선 차단제 개발을 위한 기초 자료를 확보하기 위하여, 국내산 해조류 중의 자외선 흡수 물질의 분포를 조사하였다. (중략)

• 건강소식
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• v.37 no.5
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• pp.34-35
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• 2013

계절의 여왕 오월을 맞아 들로 산으로 바깥나들이를 계획하는 사람들이 늘어나고 있다. 화사한 봄기운을 받으며 예쁜 꽃구경을 하는 것도 좋지만 문제는 자외선. 특히 요즘처럼 햇살이 점점 따가워지는 때일수록 피부를 위해 자외선차단제만큼은 절대 빼놓지 말아야 한다. 여기에서 드는 의문 하나, 외출할 때 필수품 자외선차단제 과연 얼마나 발라야할까?

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.1
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• pp.559-564
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• 2011

The UV blocking type pressure-sensitive adhesive sheet was developed by mixing UV blocking reagent with adhesive material, instead of conventional method in which the reagent was mixed with PVC substrate. The blocking performance of the sheet was evaluated by measuring the absorbance in 280-400 nm region. Both organic and inorganic type blocking reagents were examined. The blocking ability of the former is better than that of the later. Only 1% addition of blocking reagents is effective to block UV light without affecting to visibility and tackiness of adhesive tapes.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.43 no.4
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• pp.321-327
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• 2017

This study was carried out to develop a stable plant-derived natural sunscreen (BHC-S) that replaces the artificially synthesized organic sunscreen agents. The natural sunscreen (BHC-S), which is composed of peanut extract, Centella asiatica extract, and Ecklonia stolonifera extract, has the same level of ultraviolet shielding effect as PARSOL MCX-XR (OMC), which is a synthetic sunscreen. and has safety against skin. MultiFunctional effect such as and anti-wrinkle improvement. Thus, it can be used as raw material for natural cosmetics for ultraviolet ray blocking, and anti-aging.

• Journal of the Korean Applied Science and Technology
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• v.35 no.4
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• pp.1197-1205
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• 2018

UV protection cosmetics belong to functional cosmetics and contain organic or inorganic UV blocking pigments. The inorganic UV blocking pigments are mainly zinc oxide and titanium dioxide. It is known that inorganic UV blocking pigment has a diameter of 60 to 100 nm and has good blocking ability of UVA and UVB. Also, it has high inactivity against sunlight including UV and is excellent in safety. In addition, it is not absorbed or accumulated on the skin like organic pigments and does not cause skin irritation or allergy. In this study, mica, a plate-shaped inorganic pigment, nanosized titanium dioxide, an UV blocking material, and hydrophobic silica were surface-treated with surfactants. And then, titanium dioxide nanoparticles and silica were physically adsorbed on the mica by non-chemical mutual attraction due to differences in charge. Thereafter, the mica complex was surface-treated with silane to prepare a hydrophobic UV blocking pigment complex. The plate-shaped UV blocking composite improves the cohesiveness of a general nanoparticle material titanium dioxide, enhances UV blocking effect due to uniform dispersion, and can greatly improve dispersion stability in cosmetic formulations by surface treatment with hydrophobic property. The surface charge of the pigment was evaluated by zeta potential. The properties of the UV blocking pigment complex were evaluated by FE-SEM, XRD, FT-IR and UV-VIS.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.22 no.1
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• pp.70-83
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• 1996

자외선 차단제는 화장품 원료 중 주요 자극원의 하나이다. 그러나 자오선 차단제를 고분자로 만들 경우 피부에 도포 되었을 때 경피흡수가 불가능 하여 피부 자극 문제를 해결할 수 있다. 이에 본 연구에서는 PVBC와 alkylhydroxycinnamate를 반응시켜 고분자 자외선 차단제를 합성하였다, PVBC는 benzylic chloride를 가지고 있는 고분자로서 이 작용기는 친핵성 치환반응이 용이하므로 side chain modification이 가능하다. PVBC와 alkyl hydroxycinnamate의 반응에서 반응성은 alkyl hydroxycinnamate의 크기와 반응에 첨가된 촉매의 종류에 영향을 받는다. 효율이 낮은 촉매를 사용할 경우에는 alkyl hydroxycinnamate의 크기가 작을수록 반응수율이 높았으며, 높은 효율을 갖는 촉매를 사용할 경우에는 alkyl hydroxycinnamate의 종류에 관계없이 반응수율은 100%였다. 실험에 사용한 PVBC는 평균 분자량이 55,000이었으며, 고분자의 구조와 분자량은 NMR과 GPC로 확인하였다. 고분자 자외선 차단제의 자외선 흡수 능력은 OMC에 비해 65 - 94% 였으며, caprylic/capric triglyceride에 좋은 용해도를 보여주었다.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.49 no.4
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• pp.349-354
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• 2023

Sunscreen is a product that protects against ultraviolet rays by blocking and scattering ultraviolet rays, and has now become a daily necessity beyond cosmetics. Applying sunscreen is a common and easy way to prevent skin damage caused by ultraviolet rays. Due to its significance, the evaluation of sunscreen has evolved since its regulation by the FDA in 1978, progressing to standardized methods established by ISO. Additionally, to assess the loss of sunscreen due to activities such as water exposure or sweating, the Ministry of Food and Drug Safety in Korea and ISO have established protocols for evaluating the water-resistant sun protection factor (SPF). However, existing evaluations of water resistance have been mainly confined to test methods involving plain water, and methods accounting for the impact of seawater during activities like beach leisure, sports, and recreation are yet to be established. Based on the existing guidelines for testing the water-resistant UV protection index, this study compared the water-resistant UV protection index in water, artificial seawater (salt water) and natural seawater (sea water) to evaluate the UV protection index in real-world situations such as marine leisure, sports, and leisure activities. Through these results, we were able to compare the differences between water resistance sun protection index tests in ordinary water, artificial seawater, and natural seawater, and suggest a method for water resistance sun protection index tests using natural seawater.

• Journal of the Korean Applied Science and Technology
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• v.41 no.2
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• pp.472-483
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• 2024

This study evaluated the attitudes of the Korean population towards sunscreen use through the Health Belief Model (HBM) construct and investigated the psychological factors that influence sunscreen use. For this purpose, an online survey was conducted from 1 November 2023 to 1 January 2024, and a total of 303 participants were collected. The collected data were analysed using SPSS v. 25.0 programme using Cronbach's 𝛼, frequency analysis, descriptive statistics, correlation analysis, independent samples t-test, one way ANOVA, Scheffe's test, and multiple regression analysis. The results of the study showed that the mean score of sunscreen use was 3.26±1.384 out of 5, and there was a significant correlation between the variables of the health belief model and sunscreen use (p<.01). Gender, age, and skin colour were also associated with each variable, with women, the elderly, and those with lighter skin tending to be more proactive in sun protection. Multiple regression analyses revealed that self-efficacy (𝛽=.629, p<.001) and perceived vulnerability (𝛽=.139, p<.001), sub-factors of the Health Belief Model, had a statistically significant positive effect on sunscreen use, while perceived barriers (𝛽=-.261, p<.001) had a statistically significant negative effect on sunscreen use. These results may have important theoretical implications for the development and implementation of educational programmes to promote sunscreen use by providing insight into the psychosocial factors that influence sun protection.

• Proceedings of the KAIS Fall Conference
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• 2012.05a
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• pp.232-234
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• 2012

높은 투명성과 우수한 자외선 차단성을 갖는 금속산화물 나노입자와 유기계 자외선 차단제 및 폴리머와의 하이브리드화를 통한 고기능 입자를 합성하기 위하여 산화티탄(TiO2)에 유기 자외선차단제를 도입 하였다. 그 결과 UVB영역과 UVA영역을 동시에 차단할 수 있는 유무기 하이브리드화 자외선차단제를 제조하였다.