Complex of polyethyleneimine and anionic surfactant with functional chain: a versatile surface modifier applicable to various particles, solvents, and surface modification processes
| Autor: | Junichi Tatami, Motoyuki Iijima, Takaya Tsutsumi, Momoko Kataoka |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
technology industry and agriculture Nanoparticle macromolecular substances 02 engineering and technology Polyethylene glycol 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Toluene 0104 chemical sciences chemistry.chemical_compound Colloid and Surface Chemistry Adsorption chemistry Chemical engineering Pulmonary surfactant Surface modification 0210 nano-technology Dissolution Alkyl |
| Zdroj: | Colloids and Surfaces A: Physicochemical and Engineering Aspects. 545:110-116 |
| ISSN: | 0927-7757 |
| DOI: | 10.1016/j.colsurfa.2018.02.050 |
| Popis: | An anionic surfactant (AS) comprising a phosphate ester head group and a functional organic chain branched into a hydrophilic polyethylene glycol-based chain and a hydrophobic alkyl-based chain was complexed with polyethyleneimine (PEI) and applied as universal surface modifier for the fabrication of nanoparticles dispersible in various solvents. The complex formation could be achieved by simply mixing PEI with the AS in solvents such as toluene. While PEI was insoluble in toluene due to its hydrophilic nature, addition of the AS assisted its dissolution due to complex formation between the amine group of PEI and the phosphate group of the AS. The designed PEI-AS complex effectively adsorbed on numerous particles including metal oxides (Al2O3, Y2O3, and SiO2), metal nitrides (AlN), and metal species (Si and Ni), and was applicable to various surface modification processes. For simultaneous bead milling pulverization and surface modification of gas-phase synthesized SiO2 nanoparticles with 2.6 mg/m2 of PEI-AS, the number-based size distribution of the SiO2 nanoparticles reduced to several tens of nanometers after milling, and the resultant pulverized/surface-modified nanoparticles were dispersible in a wide range of organic solvents such as methanol, MEK, IPA, THF, MMA, EtOAc, and toluene. The ligand-exchange process of oleylamine-capped Ag nanoparticles in toluene with 2.0 mg/m2 of PEI-AS was also effective in dispersing Ag nanoparticles in various organic solvents without forming severe aggregation. |
| Databáze: | OpenAIRE |
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