As a high-performance lightweight inorganic non-metallic material, hollow glass beads have demonstrated significant advantages in the application of coatings, resins and other industrial fields. However, despite their good wetting dispersibility and flowability, uneven dispersion may still be encountered during practical application, which is mainly affected by a variety of factors.

Dispersibility challenges

Uneven particle size distribution: Hollow glass beads have a wide range of particle sizes, and different particle sizes of beads may be mixed due to differences in gravity leading to delamination, which affects the uniformity of dispersion.

Surface tension: There may be residual charge or chemical groups on the surface of the beads, leading to mutual attraction or repulsion between the beads and affecting their dispersion state in the medium.

Viscosity of the medium: when the viscosity of the coating or resin is too high, the dispersion of the microbeads becomes more difficult, which may lead to the phenomenon of agglomeration.

Stirring method: Improper stirring speed, time and method may also lead to uneven dispersion of microbeads.

Response strategy

Optimize the selection of particle size: Select the appropriate range of particle size according to the specific application scenario, and try to reduce the range of particle size distribution to reduce the phenomenon of delamination.

Surface modification: Improve the wettability and dispersibility of the surface of the beads through surface modification techniques, such as silanization treatment, coupling agent treatment, etc., to reduce surface tension and promote uniform dispersion of the beads in the medium.

Adjustment of medium viscosity: According to the dispersion demand of microbeads, adjust the viscosity of coating or resin appropriately, in order to facilitate the uniform dispersion of microbeads.

Improve the mixing process: adopt efficient mixing equipment and reasonable mixing methods, such as high-speed disperser, ultrasonic dispersion, etc., to ensure that the microbeads are fully mixed and dispersed in the medium.

Add dispersant: add appropriate amount of dispersant in the coating or resin to improve the compatibility between the microbeads and the medium and promote the uniform dispersion of the microbeads.

In summary, although hollow glass beads have good dispersibility in most cases, it is still necessary to pay attention to the above challenges and adopt corresponding coping strategies in practical applications to ensure that their performance is given full play.