New Approach for the Synthesis of Nanozirconia Fortified Microcapsules
| Autor: | Jia-Wei Chen, Shinn-Jen Chang, Dzu-How Yu, Chia-Chen Li |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Vinyl alcohol
Materials science Single process Composite number Nanotechnology 02 engineering and technology 010402 general chemistry 01 natural sciences chemistry.chemical_compound Ultimate tensile strength Electrochemistry General Materials Science Cubic zirconia Ceramic Spectroscopy Surfaces and Interfaces 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Membrane Polymerization Chemical engineering chemistry visual_art visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Langmuir. 33:5843-5851 |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/acs.langmuir.7b01066 |
| Popis: | Robust poly(urea-formaldehyde) (PUF) microcapsules with composite shells comprising zirconia (ZrO2) nanopowder incorporated in PUF were fabricated via a novel and facile one-pot synthesis. ZrO2 nanopowder was chosen because it owns one of the highest mechanical strengths among ceramics. The nanopowder was predispersed in the core material to combine encapsulation and fortification into a single process. In the core, the well-dispersed nanopowder migrated to the interface, where PUF polymerization took place. The mechanical strength of the microcapsule with nano-ZrO2 incorporated in the shell (42% by weight) is three times greater than that of the microcapsule without ZrO2. In a preliminary application wherein the microcapsules were embedded in a model of poly(vinyl alcohol) (PVA) membrane, the PVA specimen exhibited a higher ultimate tensile strength when fortified microcapsules were embedded than when unfortified microcapsules were used. |
| Databáze: | OpenAIRE |
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