Highly porous and chemical resistive P(TFEMA–DVB) monolith with tunable morphology for rapid oil/water separation
| Autor: | Yongkang Wang, Jian Chen, Xiaozheng Wan, Anhou Xu, Umair Azhar, Shuxiang Zhang, Bing Geng |
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| Rok vydání: | 2018 |
| Předmět: |
geography
Materials science geography.geographical_feature_category General Chemical Engineering Environmental pollution 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Contact angle chemistry.chemical_compound Adsorption Pulmonary surfactant Chemical engineering chemistry Fluoropolymer Monolith 0210 nano-technology Saturation (chemistry) Porosity |
| Zdroj: | RSC Advances. 8:8355-8364 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c8ra00501j |
| Popis: | A facile preparation for a series of porous poly(2,2,2-trifluoroethylmethacrylate-divinylbenzene) P(TFEMA-DVB) foams is discussed in this paper. The foams have adjustable morphology utilizing a suitable commercial surfactant, Hypermer B246, as stabilizer, and were compared with traditional organic surfactants or macromolecular block-polymers. Combining the porous properties and advantages of fluorine atoms, this type of fluoropolymer exhibited superb chemical stability and hydrophobicity performances with high porosity. These porous fluoro-monoliths preserved their regular porous structure without any degradation after immersion into strong acidic or basic solution for three days, hence demonstrating an excellent potential to deal with environmental pollution caused by oil spillages in severe environments. The tunable morphology (open and closed pores) and pore sizes were achieved by investigating various parameters like surfactant concentration, amount of external crosslinker, and aqueous phase volume. Droplet sizes of HIPEs were characterized using an optical microscope under different experimental conditions. The influence of pore structure and surface properties of polyHIPE on water contact angle and oil adsorption capacity was also explored. The results indicated that the porous material has an excellent oleophilicity and hydrophobicity, with water contact angles (WCA) up to 146.4°. Additionally, the results presented a noticeable adsorption with a very fast rate towards organic oils from either a water surface or bottom with adsorption saturation achieved in about 120 s. The prepared polyHIPEs showed a good recycling ability; even after 10 adsorption-centrifugation experiments, the adsorption capacity was still more than 85%. |
| Databáze: | OpenAIRE |
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