The steady growth of surfactants in the world provides a good external environment for the development and growth of the cosmetics industry, and the requirements for product structure, variety, performance and technology are getting higher and higher. Therefore, it is necessary to systematically develop surfactants that are safe, mild, easily biodegradable and have special effects to provide a theoretical basis for the development and application of new products. It is necessary to focus on the development of glycoside surfactants, and a variety of polyols and alcohol surfactants can be developed; systematic research and development of soybean phospholipid surfactants; development of sucrose fatty acid ester series products, strengthening research on compounding technology, and developing existing Product application scope.

The phenomenon of uniformly emulsifying non-water-soluble substances in water to form an emulsion is called emulsification. Emulsifiers are mainly used in cosmetics to produce pastes and lotions. Common powdery creams and Zhongxing creams are O/W emulsions, which can be emulsified with the anionic emulsifier fatty acid soap (soap). It is easier to use soap emulsification to prepare an emulsion with less oil content, and the gelling effect of soap can Make it have greater viscosity. For cold creams containing a large amount of oil phase, the emulsion is mostly W/O type, and natural lanolin with large water absorption and high viscosity can be used for emulsification. The most widely used emulsifiers at present are nonionic emulsifiers because they are safe and have low irritation. to

The phenomenon of increasing the solubility of slightly soluble or insoluble substances is called solubilization. When surfactant is added to water, the surface tension of the water begins to decrease sharply, and micelles are formed in which the surfactant molecules aggregate. The concentration of surfactant used to form micelles is called the critical micelle concentration. When the concentration of surfactant reaches the critical micelle concentration, the micelle can absorb oil or solid particles at one end of the lipophilic group, thereby increasing the solubility of slightly soluble or insoluble substances. to

In cosmetics, solubilizers are mainly used in the production of lotions, hair growth oils, and hair growth and hair nourishing agents. Oily ingredients in cosmetics, such as spices, oils and oil-soluble vitamins, have different solubilization formations due to differences in structure and polarity. Therefore, appropriate surfactants must be selected as solubilizers. For example, the solubilizing objects of lotion are spices, oils and pharmaceuticals, so alkyl polyoxyethylene ethers can be used to solubilize them.

Although alkylphenol polyoxyethylene ethers (OP type, TX type) have strong solubilizing ability, they are irritating to the eyes and are generally not used. In addition, castor oil-based amphoteric derivatives have excellent solubility in fragrance oils and vegetable oils, and these surfactants are non-irritating to the eyes and are suitable for the preparation of non-irritating shampoos and other cosmetics.

Source: Surfactant Network