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Continuous polymer nanocoating on silica nanoparticles
Dengyue Chen1, Dhananjay Singh, Kamalesh K Sirkar
1Otto York Department of Chemical, Biological and Pharmaceutical Engineering, New Jersey Institute of Technology , University Heights, Newark, New Jersey 07102, United States.
Langmuir : the ACS Journal of Surfaces and Colloids
|June 7, 2014
Summary
A new continuous polymer coating technique uniformly coats nanoparticles. This method, using solid hollow fiber cooling crystallization (SHFCC), is scalable and applicable to various nanoparticles for diverse industrial applications.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Engineering
Background:
- Continuous polymer coating of nanoparticles is crucial for pharmaceuticals, cosmetics, food, and electronics.
- Existing methods often lack uniformity, controllability, or scalability for nanosize coatings.
Purpose of the Study:
- To introduce a novel, continuous polymer coating/precipitation technique for uniform nanosize polymer coatings on nanoparticles.
- To demonstrate the technique's utility by coating Aerosil silica nanoparticles (SNPs) with Eudragit RL 100.
Main Methods:
- The solid hollow fiber cooling crystallization (SHFCC) technique was employed.
- Nanoparticle suspensions were pumped through hollow fibers with controlled cooling to induce polymer precipitation and coating.
- Characterization included STEM-EELS, TGA, and DLS to analyze coating uniformity, morphology, and particle size distribution.
Main Results:
- Uniformly polymer-coated SNPs were successfully obtained using the SHFCC technique.
- Both hydrophilic and hydrophobic SNPs were effectively coated.
- The technique demonstrated control over nanocoating thickness and morphology.
Conclusions:
- The SHFCC technique provides a scalable and controllable method for continuous polymer coating of nanoparticles.
- This method holds significant potential for industrial applications requiring precisely coated nanomaterials.
