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제124회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Role of fluorescent Waste Tea Residue -Carbon Dots (WTR-CDs) hybrid thin films on blocking the Ultra-violet radiations as direct application

2019년 8월 13일 11시 29분 37초
POLY.P-5 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 18일 (금요일) 11:00~12:30
Polymer Chemistry
저자 및
Govind Kolekar, Daewon Sohn1,*
Chemistry, Hanyang University, Korea
1Department of Chemistry, Hanyang University, Korea

Everyone is exposed to UV radiation from the sun and increasing number of people are exposed to artificial sources used in industry. Emissions from the sun includes visible light, heat and UV radiation. UV radiation is beneficial for the production of vitamin D which helps the body absorb calcium and phosphorus from the food and bone development. However, in environmental abundance, UV is the most risk factor for skin cancer and many other environmentally influenced skin disorders. Overexposure to UV radiation can cause cancer which is common in the united states. The two most common types of skin cancer are basal cell cancer and squamous cell cancer. Typically, they form on the head, face, neck, hands and arms because these body parts are the most exposed to UV radiation. Most cases of melanoma, the deadliest kind of skin cancer are caused by exposure to UV radiation. Therefore, the world health organization (WHO) recommends 5 to 15 minutes of sun exposure 2 to 3 times in a week. Herein we have fabricated the waste tea residue carbon dots (WTR-CDs) as a hybrid thin films used for UV blocking agents. The incorporated fluorescent WTR-CDs impart fluorescence to the whole film and films are capable to not only block the UV region but also reemit absorbed UV light into the visible region. We achieved the maximum percent of UV blocking by Polyvinylalcohol (PVA) -WTR-CDs-5 film by controlling the transparency and thickness. By the successive addition of UV blocking agent, there was no extreme changes were observed in the intrinsic mechanical as well as tensile properties of PVA films. The multidynamic properties of prepared PVA/WTR-CDs hybrid films can prove its applicability for pharmaceutical storage, packaging, wrapping and coating in diverse fields.