Optimization of UV-photografting factors in preparation of polyacrylic-polyethersulfone forward osmosis membrane using response surface methodology
Commercial nanofiltration polyethersulfone (NF2) membrane was modified via ultraviolet (UV) photografting to prepare a high-performance forward osmosis (FO) membrane. The optimized condition of grafting parameters was obtained using central composite design (CCD) and response surface methodology (RS...
| Autores: | , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/129632 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/129632 |
| Access Level: | acceso abierto |
| Palabra clave: | 66.067 620.1 UV-photografting Forward osmosis Central composite design Water flux Reverse salt diffusion Ciencias Materiales 2210.19 Fenómenos de Membrana 33 Ciencias Tecnológicas |
| Sumario: | Commercial nanofiltration polyethersulfone (NF2) membrane was modified via ultraviolet (UV) photografting to prepare a high-performance forward osmosis (FO) membrane. The optimized condition of grafting parameters was obtained using central composite design (CCD) and response surface methodology (RSM). UV-photografting time and acrylic acid (AA) monomer concentration were the considered variables, while the two RSM responses were water permeate flux and reverse salt diffusion flux (RSD). Quadratic models were established between the responses and the independent parameters using analysis of variance (ANOVA). The membranes were characterized with functional group, morphology and surface roughness. The obtained optimum conditions were 2.81 min grafting time and 27.85 g/L AA monomer concentration. Under these conditions, a maximum water permeate flux of 1.52 +/- 0.04 L/m(2)center dot h was achieved with an RSD value of 10.09 +/- 0.36 g/m(2)center dot h. The optimized membrane exhibited a higher water flux compared to the unmodified NF2 membrane without any significant change of the RSD value. |
|---|