Method for preparing W/O type arbutin lacquer wax based microemulsion
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A technology of arbutin and microemulsion, applied in the field of nanomaterials, can solve the problems of underutilization of lacquer wax resources and the like
Inactive Publication Date: 2019-03-22
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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Abstract
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Problems solved by technology
[0002] Lacquer wax is one of the characteristic resources in our country, but in the long histo
Method used
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Embodiment 1
[0007] According to compound formula HLB 0 = HLB A W A +HLB B W B , to prepare mixed surfactants with different HLB values. Stir the mixed surfactant and co-surfactant at a ratio of 2:1 and use it as a mixed emulsifier, which is recorded as M 1 ; With lacquer isopropyl ester as the oil phase, the quality is recorded as M 2 , M 1 : M 2 Add according to the ratio of 1:9, 2:8, 3:7, 4:6, 5:5, 6:4, 7:3, 8:2, 9:1. After stirring evenly, place it on a magnetic stirrer, add purified water drop by drop, and record the amount of water added when the system changes phase, which is M 3 . According to the phase transition point, the contents of oil, emulsifier and water are used to draw the pseudo-ternary phase diagram. According to the size of the microemulsion area, the best HLB value was screened out.
Embodiment 2
[0009] Select different co-surfactants, isopropanol, propylene glycol and ethanol, and stir the mixed surfactant and co-surfactant with the best ratio at 2:1, and use it as a mixed emulsifier, which is recorded as M 1 ; With lacquer isopropyl ester as the oil phase, the quality is recorded as M 2 ,M 1 : M 2 Add according to the ratio of 1:9, 2:8, 3:7, 4:6, 5:5, 6:4, 7:3, 8:2, 9:1. After stirring evenly, place it on a magnetic stirrer, add purified water drop by drop, and record the amount of water added when the system changes phase, which is M 3 . According to the phase transition point, the contents of oil, emulsifier and water are used to draw the pseudo-ternary phase diagram. Ethanol was selected as the best co-surfactant according to the area size and toxicity of the microemulsion.
Embodiment 3
[0011] Prepare the mixed surfactant and the co-surfactant according to the ratio of 1:1, 2:1, and 1:2 respectively, stir evenly, and use it as a mixed emulsifier, and record it as M 1 ; With lacquer isopropyl ester as the oil phase, the quality is recorded as M 2 ,M 1 : M 2 Add according to the ratio of 1:9, 2:8, 3:7, 4:6, 5:5, 6:4, 7:3, 8:2, 9:1. After stirring evenly, place it on a magnetic stirrer, add purified water drop by drop, and record the amount of water added when the system changes phase, which is M 3 . According to the phase transition point, the contents of oil, emulsifier and water are used to draw the pseudo-ternary phase diagram. The pseudo ternary phase diagram was drawn, and 2:1 was selected as the best mixed emulsifier ratio according to the size of the microemulsion area and the toxicity.
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Abstract
The invention discloses a method for preparing a W/O type arbutin lacquer wax based microemulsion. The method comprises the steps of: preparing mixed surfactants of different HLB values, and uniformlymixing the mixed surfactants with different cosurfactants proportionally, so as to obtain mixed emulsifiers marked as M1; weighing a certain amount of lacquer wax based isopropyl ester marked as M2,preparing the mixed emulsifiers and the lacquer wax based isopropyl ester in accordance with that M1: M2 is equal to (1: 9) to (9: 1), putting M1 and M2 into a beaker, and carrying out uniform stirring; placing the beaker on a magnetic stirrer, dropwise adding purified water under the condition that the revolution rate is 100r/min, and recording added water volume marked as M3 during phase change;screening out the mixed surfactant with the optimal HLB value and the cosurfactant with the optimal HLB value and a ratio of the surfactant to the cosurfactant by adopting a pseudo-ternary phase diagram method, and determining experimental parameters when a microemulsion area is maximum; preparing arbutin aqueous solutions of different concentrations, selecting an appropriate formula according toan optimized ternary phase diagram, and preparing the W/O type arbutin microemulsion. According to the method disclosed by the invention, the operation is simple, ambient conditions such as high shear and high temperatures are not required, and the W/O type arbutin microemulsion with stable properties can be spontaneously produced.
Description
technical field [0001] The invention relates to the technical field of nanometer materials, and relates to a preparation method of a W / O type arbutin paint wax-based microemulsion. Background technique [0002] Lacquer wax is one of the characteristic resources in my country, but in the long history of application of lacquer tree, the resource of lacquer wax has not been effectively utilized. The lacquer-based isopropyl ester synthesized from lacquer wax contains a large amount of isopropyl palmitate, isopropyl oleate and other fatty acid isopropyl esters. This type of isopropyl ester has remarkable ester-like properties and good dispersibility , easy to penetrate the skin, and has good moisturizing and water-retaining properties. Arbutin is a natural active substance isolated from plants, which is unstable and easily hydrolyzed under acidic conditions. At present, the most research and application of arbutin is its ability to remove melanin. It mainly inhibits tyrosinase,...
Claims
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Application Information
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