Preparation of Thin-Film Composite Nanofiltration Membranes Doped with N- and Cl-Functionalized Graphene Oxide for Water Desalination
| Autor: | Gustavo A. Fimbres-Weihs, Balter Trujillo-Navarrete, Sergio Pérez-Sicairos, Moisés Israel Salazar-Gastélum, Francisco J. García-Picazo, Shui W. Lin |
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| Rok vydání: | 2021 |
| Předmět: |
Thermogravimetric analysis
Materials science Polymers and Plastics Organic chemistry 02 engineering and technology 010402 general chemistry 01 natural sciences Article law.invention chemistry.chemical_compound QD241-441 X-ray photoelectron spectroscopy Acyl chloride Thin-film composite membrane law Graphene technology industry and agriculture thin-film nanocomposite membrane General Chemistry 021001 nanoscience & nanotechnology Interfacial polymerization 0104 chemical sciences Membrane interfacial polymerization Chemical engineering chemistry nanofiltration Polyamide graphene oxide N- and Cl-functionalized graphene oxide 0210 nano-technology |
| Zdroj: | Polymers Polymers, Vol 13, Iss 1637, p 1637 (2021) Volume 13 Issue 10 |
| ISSN: | 2073-4360 |
| Popis: | In the present work, chemically modified graphene oxide (GO) was incorporated as a crosslinking agent into thin-film composite (TFC) nanofiltration (NF) membranes for water desalination applications, which were prepared by the interfacial polymerization (IP) method, where the monomers were piperazine (PIP) and trimesoyl chloride (TMC). GO was functionalized with monomer-containing groups to promote covalent interactions with the polymeric film. The composite GO/polyamide (PA) was prepared by incorporating amine and acyl chloride groups into the structure of GO and then adding these chemical modified nanomaterial during IP. The effect of functionalized GO on membrane properties and performance was investigated. Chemical composition and surface morphology of the prepared GO and membranes were analyzed by thermogravimetric analysis (TGA), Raman spectroscopy, FTIR spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), and transmission electron microscopy (TEM). The fabricated composite membranes exhibited a significant increase in permeance (from 1.12 to 1.93 L m−2 h−1 bar−1) and salt rejection for Na2SO4 (from 95.9 to 98.9%) and NaCl (from 46.2 to 61.7%) at 2000 ppm, when compared to non-modified membranes. The amine- and acyl chloride-functionalized GO showed improved dispersibility in the respective phase. |
| Databáze: | OpenAIRE |
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