Preparation and Properties of Liquid Crystal Humectant Emulsion

• Main Authors: Chi Tsai, 蔡琦
• Other Authors: Chang-Chin Kwan
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/97wg6x

博士 === 靜宜大學 === 應用化學研究所 === 97 === The first part of this study is based on liquid crystal moisturizer main direction for the study is based on different formulas, add the oil phase of raw materials in different scales, different temperature comparative study of liquid crystal patterns and structure, based on O / W type emulsion liquid security wet emulsion and O / W type liquid crystal microemulsifying moisturizer and W/O / W type liquid crystal multi-phase emulsion moisturizer for the result of the study for the nematic liquid crystal layer (Smectic liquid crystals) to ceteareth-22, palmeth-2, polyglyceryl-3 two kinds of methyl glucose distearate different emulsifier combination and with the experimental conditions (water temperature at 70 ℃; oil temperature in the 70 ℃) and appropriate time and in order to obtain homogeneous emulsion system finished plan in 1200 under a polarizing microscope times can clearly observed emulsified liquid crystal phase diagram. The second part of this study was to use an appropriate amount of surfactants formed by liquid crystal emulsion with whitening ingredients - vitamin C sodium salt (Sodium Ascorbyl phosphate) combined with each other through the change of whitening agents and emulsion antioxidants (Red wine polyphenol) the proportion of different, to explore changes in the concentration on the emulsion is a polarizing microscope (Optical microscopy) to observe patterns and emulsified liquid crystal emulsion stability. In the emulsion process needs a number of factors into consideration, including the emulsifier in the ratio of surfactant, oil-water emulsion phase temperature, liquid crystal molecular structure whitening emulsion to Fourier transform infrared spectroscopy - weakened ATR ( Fourier transform infrared spectroscopy - attenuated total reflection, FTIR-ATR) analysis confirmed. The third part is the use of seaweed polysaccharides, Lithospermi Radix extract, ellagic acid, vitamin C sodium salt, Five different formulations of red wine polyphenols liquid crystal moisturizer, more hands, the face of the degree of moisture. The The experimental results showed that liquid in the amount of cosmetics, will affect the infiltration of the skin moisturizing Effect. Shear stress on the shear rate diagram, emulsion of the flow curve for a straight line, but after all the original Points show that only micro-emulsion can be caused by external force of its flow, the experiment proved to be more than 6% emulsion are Newtonian fluids, 4 percent and 2 percent for non-Newtonian fluids. With the increased concentration of viscosity decrease in the concentration of 6% when the highest viscosity value; multiple-phase emulsion (W / O / W type) is the oil add the water and then another water phase, in the past, literature is the second emulsion (two-step eulsification) this study the most Major contribution is to use an emulsified way (one-step eulsification) to obtain multi-phase emulsion to ceteareth-22, palmeth-2, polyglyceryl -2 diisostearate, polyglyceryl-3 methyl - Glucose distearate, emulsifier combination of three different and better cope with the experimental conditions (water temperature at 70 ℃; oil temperature in the 40 ℃) and appropriate time to achieve homogeneous multiple-phase emulsion system finished plan in 2000 under a polarizing microscope times can be clearly observed that the multi-phase emulsion map, homogeneous time and add the order of prescription and under shear stress affects the key to success in this study to add the active ingredient Purple grass is red, in the polarizing microscope, the more easily observed. Interfacial potential, surface tension, Fourier transform infrared spectroscopy - weakened ATR (Fourier transform infrared spectroscopy - attenuated total reflection, FTIR-ATR), contact angle and fluorescence spectrometry and other equipment to test different concentrations to explore the proportion of differences in the nature of the interface, and polarizing microscope, scanning electron microscopy, transmission electron microscopy, to explore detector liquid crystal moisturizer identification of patterns and structures. The fourth part of liquid seaweed polysaccharides moisturizer contact angle test, the smallest value in the concentration of 0.1% 60.67 ∘, said that such a concentration of seaweed polysaccharides have better wettability. When the tests of surface tension, the seaweed polysaccharide smallest value in the concentration of 0.1% 52.3 (dyne / cm), said that the concentrations of seaweed polysaccharides its surfactants better shear stress on the shear rate diagram, emulsion, and the like curve for a straight line, and all through the origin indicating that these micro-emulsion of external force can only cause of its flow, the experiment may permit more than 6% emulsion are Newtonian fluids, 4 percent and 2 percent for non-Newtonian fluids, With the increasing degree of concentration and reduce the concentration of 6% when the highest viscosity. The fifth part of liquid crystal Lithospermi Radix extract moisturizer by the experimental results show that surface tension of water will form micelles oil, when the concentration increased to 1 percent, the surfactant added to cosmetics, the better for them. The concentration of surface tension in the 25 ~ 30 dyne / cm and the contact angle of the perspective in 20 ∘ ~ 50 ∘, better surface activity and humid effect fluorescence spectrometry used indicator for the hydrophilicity of Rose Red B, fluorescent more Strong Hydrophilic the better, and add the application of skin care products in the makeup of them. Point of contact angle <90 ˚ said wettability as possible, on the contrary, the perspective of the contact angle> 90 ˚ said wettability worse, from the contact angle of the data maps to see the perspective of the smaller the better wettability, and in 1%, tend to be more contact with the perspective of 20 ∘, the better its surfactants. Fluorescence intensity of the energy released the more intense and add 0.1g Lithospermi Radix extract when a higher intensity, and that the more a polar environment, the better surfactants. Shear stress on the shear rate diagram, emulsion of the flow curve for a straight line, and all through the origin of these micro-emulsion of external force can only cause of its flow, the experiment may permit more than 8 percent emulsion are Newtonian fluids , 6% and 4% and 2% for non-Newtonian fluids. With the increased concentration of viscosity reduction in the concentration of 8% when the highest viscosity. The sixth part of ellagic acid by liquid crystal moisturizer by the experimental results showed that: the surface tension of the NaCl concentration of 0.5wt% (1 hour) of its value (16dyne/cm), when the contact angle for that at this time of the liquid more stable and better surfactants; and contact angle in the NaCl concentration of 0.35wt% when the concentration of the formation of micelles, and its value is 77.18 ° <90 °, said its wettability is better, and more hydrophilic; in fluorescent test, we Hydrophilicity Rose Red B reagents, by adding different concentrations of NaCl to test the nature of ellagic acid interface micro-cellular changes, the results show and will not affect the fluorescence intensity and hydrophilicity