Abstract
In this experiment, ZnO/brucite composite powder was prepared through the mechanochemical method; further, the properties, particle morphology, and structure of the composite powder were characterized. The results show that mechanical grinding action can promote the production of a large number of surface ions with unsaturated coordination number on the surface of brucite and ZnO particles, thereby promoting hydroxylation of the particle surfaces. The addition of NaOH to the composite system can also aid the further activation of the surface of the brucite and ZnO particles and the formation of more associated hydroxyl groups. Finally, a core–shell composite powder is formed with weak forces such as hydrogen bonds and van der Waals forces as the connecting bonds.
Highlights
Zinc oxide is an important functional inorganic material in the rubber, ceramics, and coatings industries (Mahla et al, 2021; Kayış et al, 2021)
Panels (a) and (b) of Figure 1 present the scanning electron microscopy (SEM) image and energy spectrum of ZnO/brucite composite powder, respectively, while panels (c) and (d) are the SEM image and energy spectrum of ZnO/brucite composite powder prepared with 3% NaOH, respectively
As seen in the SEM images, the brucite particles in both samples are coated with many small particles
Summary
Zinc oxide is an important functional inorganic material in the rubber, ceramics, and coatings industries (Mahla et al, 2021; Kayış et al, 2021). The results show that the amount of ZnO on the brucite particles increases after adding NaOH, and the composite effect is enhanced, indicating that NaOH can promote the preparation of the ZnO/brucite core–shell composite powder to a certain extent.
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