Related Experiment Video
Updated: Apr 4, 2026
10:27
Microfluidic Buffer Exchange for Interference-free Micro/Nanoparticle Cell Engineering
Published on: July 10, 2016
9.7K
Towards high throughput screening of nanoparticle flotation collectors
Carla Abarca1, Songtao Yang1, Robert H Pelton1
1Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L8, Canada.
Journal of Colloid and Interface Science
|August 31, 2015
Summary
Developing effective polymeric nanoparticles for mineral processing requires balancing surface properties. Researchers found that measuring nanoparticle colloidal stability and surface hydrophobicity can efficiently screen out ineffective flotation collectors, like the hydrophilic ones tested.
Area of Science:
- Materials Science
- Chemical Engineering
- Mineral Processing
Background:
- Polymeric nanoparticles are explored as flotation collectors in mineral processing.
- Effective collectors need specific surface properties for mineral deposition, colloidal stability in alkaline, high ionic strength media, and hydrophobicity for flotation.
- Combinatorial nanoparticle surface modification and high-throughput screening are key for developing new collectors.
Purpose of the Study:
- To develop efficient screening assays for identifying effective polymeric nanoparticle flotation collectors.
- To evaluate critical coagulation concentrations and contact angles as indicators of nanoparticle performance.
- To assess a library of poly(ethylene glycol) methyl ether methacrylate (PEG-methacrylate) nanoparticles as flotation collectors.
Main Methods:
- Determining critical coagulation concentrations (CCC) using sodium carbonate.
- Measuring advancing water contact angles on nanoparticle-coated glass surfaces.
- Screening a library of PEG-methacrylate based nanoparticles.
Main Results:
- A combination of CCC and contact angle measurements can effectively screen ineffective nanoparticles.
- None of the tested PEG-methacrylate nanoparticles functioned as effective flotation collectors.
- The tested nanoparticles were too hydrophilic to promote efficient flotation.
Conclusions:
- Critical coagulation concentration and contact angle measurements provide a viable, rapid screening method for nanoparticle flotation collectors.
- Hydrophilicity is a critical factor limiting the effectiveness of the tested PEG-methacrylate nanoparticles.
- Further research should focus on developing more hydrophobic nanoparticle formulations for mineral processing applications.
