Related Experiment Video
Updated: Oct 21, 2025
10:27
The Evolution of Silica Nanoparticle-polyester Coatings on Surfaces Exposed to Sunlight
Published on: October 11, 2016
9.7K
Colloidal dispersion of poly(ionic liquid)/Cu composite particles for protective surface coating against SAR-CoV-2
Atefeh Khorsand Kheirabad1, Xuefeng Pan2, Siwen Long3
1Department of Materials and Environmental Chemistry (MMK) Stockholm University Stockholm Sweden.
Nano Select : Open Access
|September 6, 2021
Summary
A novel waterproof coating using poly(ionic liquid)/copper nanoparticles effectively deactivates 90% of SARS-CoV-2. This spray-coated film offers durable, water-resistant antiviral protection for various surfaces.
Area of Science:
- Materials Science
- Nanotechnology
- Virology
Background:
- Developing effective antiviral surfaces is crucial for public health.
- Existing antiviral coatings may lack durability or water resistance.
- SARS-CoV-2 transmission via contaminated surfaces remains a concern.
Purpose of the Study:
- To create a waterproof, anti-SARS-CoV-2 protective film using a novel composite nanoparticle dispersion.
- To investigate the efficacy of poly(ionic liquid)/copper (PIL/Cu) nanoparticles in deactivating SARS-CoV-2.
- To establish a scalable method for producing antiviral surface coatings.
Main Methods:
- Synthesized poly(ionic liquid) (PIL) nanoparticles via suspension polymerization.
- Incorporated copper nanoparticles (Cu) onto PIL nanoparticles via in situ reduction.
- Applied the PIL/Cu nanoparticle dispersion as a waterproof coating via spray-coating.
- Quantified SARS-CoV-2 deactivation efficacy on the coated surface.
Main Results:
- A stable, waterproof coating of PIL/Cu composite nanoparticles was successfully prepared.
- The coating demonstrated significant deactivation of SARS-CoV-2 virions, achieving 90.0% reduction within 30 minutes.
- The PIL component ensured coating stability despite being waterborne.
Conclusions:
- The developed PIL/Cu nanoparticle coating provides effective and durable antiviral protection against SARS-CoV-2.
- Spray-coating of aqueous dispersions offers a versatile method for broad application of antiviral surfaces.
- This technology holds potential for preventing virus transmission on frequently touched surfaces in diverse environments.
Related Concept Videos
01:09Colloidal precipitates
1.3K
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
1.3K
01:06Coagulation
486
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
486
03:22Colloids
18.7K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
18.7K