Hybrid organic/inorganic TiO₂ composites for enhanced UV shielding, antioxidant and quenched photocatalytic properties

• 발행기관: 한국응용과학기술학회 (구.한국유화학회)
• 저자명: Hui Jun Leong Young Ho Kim Jae Min Yoon Jang yung Yoo Sun Young Kim Yu ji Hwang Seong Geun Oh
• 간행물 정보: 『한국유화학회 학술대회 논문집』2017년 추계학술대회, 39~39쪽, 전체 1쪽
• 주제분류: 공학 > 화학공학
• 파일형태: PDF
• 발행일자: 2017.11.02

영문 초록

Multifunctional TiO₂ composites were prepared by hybridization of inorganic TiO₂ using skin lightening materials with antioxidant properties. TiO₂ microspheres, as a supporting material in the composite were synthesized through surfactant assisted sol-gel method. Prior to the functionalization, carboxylation treatment using monochloroacetic acid was performed to introduce carboxyl chemical binders on the surface of TiO₂ substrate. Core shell structured phenylethyl resorcinol/TiO₂ and alpha-bisabolol/TiO₂ could be obtained through condensation esterification between carboxyl groups present on the TiO₂ surface and hydroxyl groups of skin lightening materials. The obtained composite demonstrated enhanced UV light absorption ability in UVA region while suppressing photocatalytic activity of TiO₂ core. This was attributed to the inhibition of photo-induced electron transfer process by deposited phenylethyl resorcinol and alpha-bisabolol layer. In order to apply in cosmetic and dermatology fields, particularly in anti-aging and hyperpigmentation treatment, the antioxidant properties of functionalized TiO₂ were accessed by scavenging activities of ABTS˙ and DPPH˙ free radicals. Both functionalized microspheres exhibited scavenging ability towards ABTS˙ and DPPH˙ radicals. Our studies revealed that the surface modification of TiO₂ with phenylethyl resorcinol and alpha-bisabolol successfully suppress the generation of reactive free radicals and reduce oxidative damage to human skin.

키워드

hybrid composites chemical binders skin lightening snti-oxidant activity cosmetics