Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Preparation of blocking ultraviolet mica composites using Nano-TiO2

Nano-TiO2를 이용한 자외선차단 마이카 복합체 제조

  • Yun, Ki Hoon (Department of Industrial Engineering Chemistry, Chungbuk National University) ;
  • Lee, Jaebok (Department of Industrial Plant Science & Technology, Chungbuk National University) ;
  • Moon, Young-Jin (Research Institude, Soleon Co., Ltd) ;
  • Go, Hee Kyoung (Research Institude, Soleon Co., Ltd) ;
  • Lee, Yi (Department of Industrial Plant Science & Technology, Chungbuk National University) ;
  • Lee, Dong-Kyu (Department of Industrial Engineering Chemistry, Chungbuk National University)
  • 윤기훈 (충북대학교 공과대학 공업화학과) ;
  • 이재복 (충북대학교 농업생명환경대학 특용식물학과) ;
  • 문영진 ((주)솔레온 기업부설연구소) ;
  • 고희경 ((주)솔레온 기업부설연구소) ;
  • 이이 (충북대학교 농업생명환경대학 특용식물학과) ;
  • 이동규 (충북대학교 공과대학 공업화학과)
  • Received : 2018.11.30
  • Accepted : 2018.12.21
  • Published : 2018.12.31
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Abstract

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.

자외선차단 화장품은 기능성 화장품 중의 하나로서, 유 무기 자외선차단물질이 함유되어 있다. 무기계 자외선차단제는 주로 산화아연, 이산화티탄 등이 있다. 무기계 자외선차단제는 입자의 지름이 60 ~ 100 nm로 자외선 A, B의 차단능이 좋은 것으로 알려져 있다. 또한자외선을 포함한 태양광선에 대해 비활성이 크고 안전성이 우수하다. 그리고 유기계 자외선차단제처럼 피부에 흡수 또는 축적되지 않으므로 피부자극이나 알레르기를 유발하지 않는다. 본 연구에서는 판상 무기안료인 마이카, 자외선차단 효과를 갖는 이산화티탄 나노입자, 소수성 실리카를 각각 계면활성제로 표면처리 하였고, 각 물질의 전하 차이에 따른 비화학적인 상호 인력 작용에 의해 마이카에 이산화티탄 나노입자, 실리카를 물리적으로 흡착시켰다. 이후, 소수성 표면처리제인 실란을 표면처리 하여 소수성을 갖는 자외선 차단 판상 마이카 복합체를 제조하였다. 자외선 차단 판상 마이카 복합체는 일반적인 나노입자 이산화티탄의 응집성을 개선하고 균일한 분산에 따른 자외선차단 효과가 증대되었으며, 소수성으로 표면처리를 하여 화장품 제형에서의 분산안정성을 크게 개선할 수 있었다. 안료의 표면전하는 제타전위로 평가하였으며, 제조된 자외선차단 마이카 복합체의 특성 평가는 FE-SEM, XRD, FT-IR, UV-VIS 등으로 확인하였다.

Keywords

HGOHBI_2018_v35n4_1197_f0001.png 이미지

Fig. 1. Synthesis procedure for Composite Mica.

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Fig. 2. Zeta potential of raw material and the material treated with different surfactants.

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Fig. 3. Particle size analysis of complex and two types of TiO2.

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Fig. 4. XRD graph of complex, mica and nano TiO2.

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Fig. 5. FT-IR absorbance spectra of Mica SF and nano TiO2..

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Fig. 6. Surface treatment results of FE-SEM of mica (a), F.I.B. of complex (b) and (c).

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Fig. 7. UV-VIS spectrophotometer analysis of raw material and complex.

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Fig. 8. Draw down of complex (a), nano TiO2 (b), micro TiO2 (c).

Table. 1. Zeta potential of raw material and surfactant concentration

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Table 2. Total transparency and haze meter parameter of raw material and complex.

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