Biomaterial & Sustainable Solution -Antibacterial Shell Powder
The Magical Transformation of Oyster Shells: A Journey of Wonder
Oysters are a key economic resource along the western coast of Taiwan. However, discarded oyster shells pile up, causing environmental problems. These piles attract mosquitoes and emit bad odours, affecting the local scenery. Taiwan produces nearly 120,000 tons of oyster shell waste annually. Recycling these shells through special treatments not only reduces pollution but also transforms them into substances with antibacterial properties.
Knowledge of Calcined Oyster Shell Powder
"Calcination" involves heating raw materials to cause chemical and physical changes. Under a scanning electron microscope, we see that raw oyster shell powder is lamellar, but after high-temperature calcination, it becomes porous. This increases its surface area from 182 m²/g to 248 m²/g and refines the particle size. Calcined oyster shell powder also shows improved adsorption capacity for low molecular weight substances and has demonstrated antibacterial and antifungal properties against various bacteria and fungi.
Advantages of Compounding Discarded Oyster Shell Powder into PE and PP Plastic Chips
- Antibacterial Properties:
The calcined oyster shell powder has been shown to inhibit harmful bacteria and fungi, enhancing the hygiene of plastic products.
- Environmental Benefit:
Recycling discarded oyster shells reduces environmental pollution and contributes to a zero-waste approach.
- Improved Material Properties:
The calcination process increases the surface area and adsorption capacity of the powder, potentially enhancing the material properties of the plastic.
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- Wide Range of Applications:
These antibacterial plastics can be used in various fields, such as food packaging and medical equipment, where hygiene is crucial.
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- Sustainable Resource Utilization:
Utilizing a waste product as a valuable resource supports sustainable development and reduces the reliance on virgin materials.
