Application of ultrasonic equipment in cosmetics

Ultrasound-assisted preparation of nanoemulsions in cosmetics

With the continuous development of science and technology, more and more new technologies are being used in the cosmetics industry, among which ultrasonic technology has attracted much attention due to its unique physical effects. This article will explore the application of ultrasound-assisted preparation of nanoemulsions in cosmetics and their preparation principles.

Introduction to Nanoemulsion

Nanoemulsion is a milky object formed by fine oil droplets dispersed in an aqueous phase. Compared with traditional emulsions, the diameter of its oil droplets is usually between 100-500 nanometers. The smaller particle size makes nanoemulsions have better stability and permeability. Therefore, nanoemulsions are widely used in cosmetics, such as skin care products, makeup, etc.

Application of ultrasound in nanoemulsion preparation

Ultrasonic technology is widely used in cosmetic preparation due to its high efficiency, speed and environmental protection. The application of ultrasound in the preparation process of nanoemulsion can improve the emulsification effect, shorten the emulsification time, and avoid some shortcomings of traditional methods.

1. Ultrasonic emulsification

Ultrasonic waves cause the liquid to undergo a violent compression and expansion cycle through high-frequency vibration, forming micro-triggered bubbles with high energy. These micro-triggered bubbles collapse rapidly during their expansion phase, generating localized high temperatures and pressures, as well as large amounts of liquid kinetic energy. This micro-triggered bubble collapse process causes severe shear force and pressure changes in the liquid, thereby achieving an emulsification effect and making the nanoparticles better dispersed in the water phase.

2. Advantages of ultrasound-assisted emulsification

Compared with traditional emulsification methods, ultrasound-assisted emulsification has the following advantages:

(1) Efficient and fast: Under the action of ultrasonic waves, it can accelerate the interaction between the oil phase and the water phase, improve the emulsification effect, and reduce the emulsification time.

(2) Uniform dispersion: Ultrasonic waves can solve the problem of uneven dispersion that easily occurs in traditional emulsification methods and make the nanoparticles in the nanoemulsion liquid evenly distributed.

(3) Enhanced stability: Due to the large shear force experienced during the ultrasonic emulsification process, the combination of surfactant molecules and the surface of nanoparticles can be promoted, thereby enhancing the stability of nanoemulsions.