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Related Concept Videos

Waterproofing and Anti-Bacterial Admixtures in Concrete01:22

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Concrete's susceptibility to water absorption is due to the capillary action within the pores of its hydrated cement paste. This action draws water in, creating the need for waterproofing admixtures to prevent such penetration. The efficacy of these admixtures is contingent upon the water pressure, with variations arising from different conditions such as rain, capillary rise, or hydrostatic pressure in structures intended to hold water.
Waterproofing admixtures render concrete hydrophobic,...
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Antibacterial Nanocomposite Ceramic Coating for Liquid Filtration Application.

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Innovative zirconia and silver nanocluster coatings on membranes effectively purify water by inhibiting bacterial growth. This eco-friendly method offers a sustainable solution for safe water filtration, reducing microbial contamination significantly.

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Area of Science:

  • Materials Science
  • Environmental Science
  • Nanotechnology

Background:

  • Microbial water contamination is a growing global issue driven by urbanization and industrialization.
  • Developing eco-friendly and human-safe water purification methods is crucial.
  • Existing methods often fall short in effectively addressing diverse microbial threats.

Purpose of the Study:

  • To develop and evaluate novel antibacterial nanocomposite coatings for water filtration.
  • To assess the efficacy of zirconia and silver nanocluster coatings on polymeric membranes.
  • To explore a sustainable and scalable approach for water purification.

Main Methods:

  • Fabrication of nanocomposite coatings using eco-friendly co-sputtering physical vapor deposition (PVD).
  • Deposition of zirconia (ZrO2) and silver (Ag) nanoclusters onto electrospun polycaprolactone (PCL) and polyacrylonitrile-polycaprolactone (PAN-PCL) membranes.
  • Characterization using XRD, UV-Vis spectroscopy, wettability tests, and antibacterial/filtration assays.

Main Results:

  • Confirmed homogeneous deposition of amorphous ZrO2 embedding Ag nanoclusters on polymeric fibers.
  • Coated membranes exhibited increased hydrophobicity, enhancing filtration performance, especially for PCL.
  • Demonstrated strong antibacterial activity against Staphylococcus epidermidis and significant reduction of Bacillus subtilis and Listeria monocytogenes in filtration tests.

Conclusions:

  • ZrO2/Ag nanocomposite coatings are effective in controlling microbial contamination in water.
  • The eco-friendly PVD method provides a scalable strategy for producing advanced water filtration membranes.
  • These findings highlight a promising approach for sustainable and safe water purification systems.