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KMID : 0604520190450020105
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Journal of the Society of Cosmetic Scientists of Korea
2019 Volume.45 No. 2 p.105 ~ p.116
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A Method to Determine Amount of Adsorbed Oil in Hair Washing Using Absorption Spectroscopy
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Song Sang-Hoon
Kim Hyun-Young
Son Seong-Kil
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Abstract
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Oil adsorption during hair or body washing is responsible for the hair conditioning. In this study, we established a method to extract oil from a substrate, and to determine amount of adsorbed oil upon substrate using a conventional absorption spectroscopy. We controlled the mole fraction of a surfactant in a mixture of anionic and amphoteric surfactants because that it induces the coacervate that regulates amount of adsorbed oil through the alteration of oil viscosity. Based on this, we established the optimized condition for adsorption and extraction for oil. UV absorbance were employed to estimate the amount of adsorbed oil using optical absorbance after extraction via adsorption. The estimation was confirmed by comparing with a mass analysis in HPLC and an adhesive energy in AFM. It has been proved that this method can be applied to all cases of oil adsorption from the results with various cationic polymers and a complex system of the polymers which regulate the oil adsorption.
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KEYWORD
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oil delivery, adsorption, UV absorption
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