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The surface modification and characterization of SiO2 nanoparticles for higher foam stability
Mansoo Choi1, Wang-Kyu Choi2, Chong-Hun Jung2
1Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, Daejeon, 305-353, Korea. teracms@kaeri.re.kr.
Scientific Reports
|November 11, 2020
Summary
Surface modification of silica nanoparticles (SiO2) with 3-isocyanatopropyltriethoxy-silane (ICP) enhanced their surface activity. This modification significantly improved foam stability, offering new possibilities for colloidal nanoparticle applications.
Area of Science:
- Materials Science
- Colloid and Surface Chemistry
Background:
- Surfactants and colloidal nanoparticles are crucial in complex mixture applications.
- Hydrophilic silica nanoparticles (SiO2) exhibit limited surface activity at liquid/air interfaces.
Purpose of the Study:
- To investigate the impact of surface modification on SiO2 nanoparticle behavior.
- To evaluate the effect of 3-isocyanatopropyltriethoxy-silane (ICP) on foam stability.
Main Methods:
- Surface modification of SiO2 nanoparticles using ICP.
- Analysis of physical properties via X-ray Diffraction (XRD), Thermogravimetric Analysis (TGA), Fourier-Transform Infrared Spectroscopy (FT-IR), and Scanning Electron Microscopy (SEM).
- Contact angle measurements to assess surface hydrophobicity.
Main Results:
- Surface modification increased the contact angle of SiO2 nanoparticles from 62° to 82° with increasing ICP concentration.
- ICP-modified SiO2 nanoparticles demonstrated enhanced foam stability compared to unmodified nanoparticles.
- Optimal ICP concentration was identified for improved foam stability.
Conclusions:
- Surface modification of SiO2 nanoparticles with ICP effectively enhances their surface activity.
- ICP-modified SiO2 nanoparticles significantly improve foam stability.
- This study provides a method for optimizing nanoparticle properties for enhanced foam applications.
