Polyvinyl alcohol modified magnesium hydroxide: the secret of morphology optimization and dispersibility improvement
Magnesium hydroxide (Mg(OH)₂), as a multifunctional inorganic material, plays an important role in industrial applications. However, its dispersion and morphology control during application have been technical challenges. Polyvinyl alcohol (PVA), as a modifier, has been proven to be effective in improving the morphology and dispersion of magnesium hydroxide. This article will explore the effect of polyvinyl alcohol on the morphology and dispersion of magnesium hydroxide, as well as the effect of modified magnesium hydroxide in practical applications.
Morphological analysis
Through SEM and TEM observations, the surface of the modified magnesium hydroxide powder is smoother, there is no obvious agglomeration, and the dispersion is significantly improved. The modified powder has a uniform particle size distribution and regular morphology, showing a spherical or flaky shape, which is beneficial to improving its dispersion and compatibility in the base material.
Ingredient analysis
XRD analysis shows that the main diffraction peaks of the modified magnesium hydroxide powder are consistent with those of standard magnesium hydroxide, and there are no other impurity peaks, indicating that the powder is of high purity. The EDX analysis results showed that the presence of PVA was detected on the surface of the modified magnesium hydroxide powder, confirming the success of the modification.
Specific surface area analysis
BET test results show that the modified magnesium hydroxide powder has a slightly increased specific surface area and improved adsorption performance. This improves the application performance of modified magnesium hydroxide in catalysis, adsorption and other fields.
Thermal stability
TGA and DSC test results show that the thermal stability of the modified magnesium hydroxide powder at high temperatures is slightly improved, the thermal decomposition temperature increases from 340°C to 350°C, and the thermal decomposition process is more stable.
Application examples
1. Flame retardant: A plastic products factory uses modified magnesium hydroxide as a flame retardant and adds it to the plastic substrate. The dispersion and compatibility of modified magnesium hydroxide in plastic substrates are significantly improved, and the flame retardant performance reaches V-0 level, meeting customer requirements.
2. Catalyst: A chemical plant uses modified magnesium hydroxide as a catalyst carrier to load active components. The modified magnesium hydroxide has a high specific surface area and good thermal stability, which significantly improves the activity and stability of the catalyst and meets production requirements.
The modification of magnesium hydroxide with polyvinyl alcohol significantly improves the application performance of magnesium hydroxide by improving its morphology and dispersion. Modified magnesium hydroxide shows excellent performance in flame retardants, catalysts and other fields to meet the needs of different industrial applications. In the future, with the continuous advancement of modification technology, the application fields of magnesium hydroxide will be further expanded, making greater contributions to the realization of high-performance materials and sustainable development.