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| Preparation technology of modified camellia oil for cosmetics |
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| DOI：10.12166/j.zgyz.1003-7969/2020.06.009 |
| KeyWord:modified camellia oil cosmetics camellia oil hydrolyzate esterification |
| FundProject:福建省科技厅产学研项目（2017N5007）；福建省科技厅公益性项目(2019R1009-8)；福建省林业厅项目(闽林科（2017）3号) |
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| Abstract: |
| The modified camellia oil was prepared by esterification reaction at high temperature using camellia oil hydrolyzate and polyethylene glycol 600(PEG600) as raw materials. The effects of catalyst type and dosage, reaction temperature, feed ratio and reaction time on the esterification reaction were investigated. According to the single factor experiment, the optimal conditions for preparing modified camellia oil were obtained as follows: preheating tempreture 80 ℃,preheating time 5 min, 4 molecular sieve as catalyst, dosage 0.4%, reaction temperature 160 ℃, feed ratio(molar ratio of PEG600 to camellia oil hydrolyzate) 1∶ 1.2, reaction time 6.5 h. Under these conditions, the esterification rate was 93.16%, and the obtained product could be mutually soluble in water at any ratio. After separating and purifying the product, qualitative tests, infrared spectrum and ultra high performance liquid chromatography-mass spectrometry (UPLC-MS) analysis showed that the main components of the modified camellia oil were polyethylene glycol mono-esters and glycol di-esters. The properties of the product were tested and the water content was 0.67%, the saponification value was 110.2 mgKOH/g, the peroxide value was 4.6 mmol/kg, and the critical micelle concentration was 1.5 g/L(with the surface tension 32.01 mN/m), the HLB value was 14, and the maximum water separating time of emulsification was 9.8 min. |
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