Synthetic and natural magnesium silicates have similar application potentials due to similarities in their structures. In the literature, there have been many studies on the synthesis of magnesium silicates. Methods to control the physicochemical properties and morphology of magnesium silicates have also been examined, including the effects of surface modification the effects of additives during synthesis, including nonionic surfactants, and sodium hydroxide, as well as the effects of pH on synthesis and adsorption capacity. Compared with the polycrystalline structure of natural magnesium silicate minerals, synthetic magnesium silicates commercially available are often amorphous and porous, potentially resulting in more significant dissociation in a liquid dispersion system. For example, in acidic solutions, Mg2+ ions can be leached out, i.e., dissociate from the silicate ion pairs, known as “acid leaching” of silicates. Reaction of the free Mg2+ ions with other species in the solution can generate magnesium complexes that may alter product integrity and physical properties upon storage. Several studies have shown changes in magnesium silicate properties and morphology upon the addition of surfactants and ionic compounds or as an effect of pH. However, to the best of our knowledge, studies on synthetic magnesium silicate stability under these conditions are lacking. Consequently, there is a need to determine the stability of synthetic magnesium silicate in various solutions and monitor possible changes in morphology.
Talc powder has physicochemical properties such as lubrication, softness, anti-adhesion, good gloss, flow aid, hydrophobicity, good hiding power, strong adsorption force, fire resistance, insulation, acid resistance, etc. Widely used in cosmetics, pharmaceuticals, food, coatings, paper, plastics, rubber, cables, ceramics, textiles and other manufacturing industries; At the same time, talcum powder has the characteristics of heat removal, moisture permeability, and phlegm, and is often used to treat diseases such as heat and polydipsia, urination, water diarrhea, phlegm, gonorrhea, jaundice, edema, blood stasis.
Magnesium silicate is also used to absorb moisture, prevent caking, and to improve the feel of a product. In the pharmaceutical companies, it is used as a dietary supplement, as part of the formulation ingredients in drug production, in antacid and antiulcer preparations, as a component of antiepileptic drugs, in antifungal topical agents and in the treatment of acne and as a facial moisturizer. When complexed with arginine, magnesium silicate can be used as an antiatherosclerosis agent and to promote bone and cartilage formation in mammals