Ionic release behavior of polymer-coated and uncoated metal nanoparticles (MNPs) in various conditions: effects of particle shape, size, and natural media reactivity

• Published in: Colloid and polymer science Vol. 295; no. 10; pp. 1961 - 1971
• Main Authors: Jahan, Shanaz, Alias, Yatimah Binti, Abu Bakar, Ahmad Farid Bin, Yusoff, Ismail Bin
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.10.2017; Springer Nature B.V
• Subjects: Biocompatibility; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Coating effects; Complex Fluids and Microfluidics; Dissolution; Food Science; Gold; Nanoparticles; Nanotechnology and Microengineering; Original Contribution; Particle shape; Physical Chemistry; Polyetherimides; Polyethylene glycol; Polyethylenes; Polymer coatings; Polymer Sciences; Silver; Soft and Granular Matter; Surgical implants; Titanium oxides; Toxicity; Zinc coatings; Zinc oxide; Metal nanoparticles; Ionic release behavior; Retention; River water; Porous medium
• ISSN: 0303-402X; 1435-1536
• DOI: 10.1007/s00396-017-4155-0

Metal nanoparticles (MNPs), due to its increasingly wide applications in consumer products, raises its concern towards ecotoxicology. Once released into the environment, the zero-valent metal (M°) readily oxidized to ionic metal (M + ) which is reported as the main source of toxicity related to MNPs. The current study investigated the oxidative dissolution and M + release profiles, from polymer-coated and uncoated MNPs. The polyethylene imine coated silver nanoparticles (PEI@AgNPs), polyethylene glycol coated zinc oxide micro-rods (PEG@ZnOMRs), and uncoated titanium dioxide nanoparticles (TiO 2 NPs) were synthesized with different size, shape, and surface functionalities, and M + flow behavior was investigated through column transport experiment. The results obtained revealed that the ionic dissolution and M + loss was 1.6–3.3% for PEI@AgNPs, 8.3–12.6% for TiO 2 NPs, and 13.6–19.0% for PEG@ZnOMRs. These results suggested that PEI surface coating greatly inhibit the M + release and maximum column retention occurs in order of PEI@AgNPs ˃ TiO 2 NPs ˃ PEG@ZnOMRs.