Nanostructured Glass-Ceramic Materials from Glass Waste with Antimicrobial Activity
Juliani P Caland1, João Baptista2, Gabrielle Caroline Peiter2
1Núcleo de Física Aplicada, Instituto de Física, Brasília, Universidade de Brasília-UnB, Brasilia 70910-900, DF, Brazil.
Molecules (Basel, Switzerland)
|July 13, 2024
Summary
Waste glass can be transformed into antimicrobial materials through simple thermal treatment. Flint glass, when heated to 720°C, demonstrates potent bactericidal effects against Escherichia coli.
Area of Science:
- Materials Science
- Environmental Science
- Nanotechnology
Background:
- Municipal waste glass poses environmental challenges due to inadequate recycling infrastructure.
- Flint and amber glass are abundant in waste streams and represent potential raw material sources.
- Developing effective recycling methods for glass waste is crucial for sustainability.
Purpose of the Study:
- To develop an affordable method for converting waste glass into antimicrobial materials.
- To investigate the antimicrobial properties of thermally treated glass waste.
- To characterize the resulting glass-ceramic materials and understand the mechanism of their bactericidal effect.
Main Methods:
- Waste glass (flint and amber) was subjected to thermal treatment at 720°C.
- Antimicrobial activity was tested against Escherichia coli.
- Laser-induced breakdown spectroscopy (LIBS) was used for elemental analysis.
- Transmission electron microscopy (TEM) characterized the material structure.
Main Results:
- Thermal treatment of waste glass induces crystallized nanoregions responsible for antimicrobial activity.
- Flint waste glass treated at 720°C exhibited superior antimicrobial activity compared to amber glass.
- Glass-ceramic derived from flint waste glass showed rapid antimicrobial action against Escherichia coli within 30 minutes.
- TEM confirmed the presence of nanocrystals within the glass matrix.
Conclusions:
- Waste glass can be repurposed into effective antimicrobial glass-ceramic materials via thermal treatment.
- The formation of nanoregions during thermal processing is key to the bactericidal properties.
- Flint glass offers a promising precursor for developing sustainable antimicrobial solutions.
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