About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Characterization of Minerals, Metals and Materials
|
Presentation Title |
K-55: Characterization of STP Effects on Encapsulation Process and How to Attenuate it
to Produce PLA, PLA/MMT.K and PLA/O-MMT.K Microcapsules |
Author(s) |
Bianca Bottega Michel, Francisco Rolando Valenzuela-Diáz, Maria das Graças Silva-Valenzuela, Wang Shu Hui, Jessica Arjona |
On-Site Speaker (Planned) |
Bianca Bottega Michel |
Abstract Scope |
In general, controlled release system involves encapsulation of organic substances. Is there any side effects on encapsulating process efficiency of inorganic substances? This work aims to identify morphologic and dimension modifications of PLA, PLA/MMT.K and PLA/O-MMT.K microcapsules encapsulated with sodium tripolyphosphate (STP), and how methodological adaptations can mitigate possible effects. Nanocomposites and microcapsules were synthetized by solvent diffusion and solvent emulsification-diffusion methods. Characterization was performed by SEM, XRD, and TGA. Results by XRD and TGA corroborate that PLA/MMT.K form and intercalated nanostructure. SEM images suggested that a significant increase in encapsulated microcapsules average diameter and appearance of non-spheroid shapes. Increase of dispersant concentration attenuates these effects: low surface change, average diameter, and standard deviation reduction of at least 30%. Inorganic component encapsulation process may structurally affect the capsules intended to contain it, but it is possible to perform adaptations so there is no loss of quality of final product. |
Proceedings Inclusion? |
Planned: |