Discussion Overview
The discussion revolves around the challenges of dispersing nano TiO2 in water for the purpose of creating nanocomposites. Participants explore the solubility and dispersion of TiO2, as well as methods to achieve stable suspensions.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
- Mathematical reasoning
Main Points Raised
- One participant expresses difficulty in dissolving nano TiO2 in water, despite claims in literature suggesting it can dissolve.
- Another participant asserts that TiO2 is insoluble in water and suggests that the literature may be incorrect or that a specific procedure is required.
- A different viewpoint suggests that "dissolve" may be used interchangeably with "disperse," recommending the use of a dispersant to achieve a stable dispersion of the nanopowder.
- A participant questions how to remove a solvent after dispersion, noting concerns about water evaporation and the need for a homogeneous composite.
- It is noted that while TiO2 does not dissolve into free ions in water, stable colloidal suspensions can be achieved with small particles and appropriate dispersants. However, achieving homogeneity on the nanoscale may require additional methods such as sol-gel or polymerized complex techniques.
Areas of Agreement / Disagreement
Participants do not reach a consensus on the solubility of TiO2 in water, with some asserting it is insoluble while others suggest that dispersion is possible with the right techniques. The discussion remains unresolved regarding the best methods for achieving a homogeneous composite.
Contextual Notes
There are limitations regarding the definitions of "dissolve" and "disperse," as well as the effectiveness of different methods for achieving homogeneity in nanocomposites. The discussion also highlights the potential need for specialized literature on the subject.
