Hollow latex particles functionalized with chitosan for the removal of formaldehyde from indoor air
| Autor: | Pakorn Opaprakasit, Pramuan Tangboriboonrat, Sukanya Nuasaen |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Vinyl Compounds
Polymers and Plastics Latex Formaldehyde engineering.material Chitosan chemistry.chemical_compound Adsorption Coating Polymer chemistry Materials Chemistry Polyethyleneimine Polymethyl Methacrylate Fourier transform infrared spectroscopy Amines Air Pollutants Schiff base Nucleophilic addition Organic Chemistry chemistry Chemical bond Acrylates Air Pollution Indoor engineering Nuclear chemistry |
| Zdroj: | Carbohydrate polymers. 101 |
| ISSN: | 1879-1344 |
| Popis: | Chitosan and polyethyleneimine (PEI) functionalized hollow latex (HL) particles were conveniently fabricated by coating poly(methyl methacrylate-co-divinyl benzene-co-acrylic acid) (P(MMA/DVB/AA)) HL particles with 5 wt% chitosan or 14 wt% PEI. The materials were used as formaldehyde adsorbent, where their adsorbent activity was examined by Fourier Transform Infrared (FTIR) spectroscopy. The nucleophilic addition of amines to carbonyls generated a carbinolamine intermediate with a characteristic band at 1,020 cm(-1) and Schiff base product at 1650 cm(-1), whose intensity increased with prolonged formaldehyde exposure times. The major products observed in HL-chitosan were carbinolamine and Schiff base, whereas a small amount of Schiff base was obtained in HL-PEI particles, confirming a chemical bond formation without re-emission of formaldehyde. Compared to HL-PEI, HL-chitosan possesses higher formaldehyde adsorption efficiency. Besides providing opacity and whiteness, the multilayer HL-chitosan particles can effectively remove indoor air pollutants, i.e., formaldehyde gas, and, hence, would be useful in special coating applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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