Effect of the relative humidity on the fibre morphology of polyamide 4.6 and polyamide 6.9 nanofibres
| Autor: | Tebello Nyokong, Bert De Schoenmaker, Philippe Westbroek, Paul Kiekens, Lien Van der Schueren, Ruphino Zugle, Karen De Clerck, Annelies Goethals |
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| Rok vydání: | 2012 |
| Předmět: |
chemistry.chemical_classification
Materials science Morphology (linguistics) Scanning electron microscope Mechanical Engineering Polymer Electrospinning Solvent Differential scanning calorimetry chemistry Mechanics of Materials Polyamide General Materials Science Relative humidity Composite material |
| Zdroj: | Journal of Materials Science. 48:1746-1754 |
| ISSN: | 1573-4803 0022-2461 |
| DOI: | 10.1007/s10853-012-6934-9 |
| Popis: | To obtain uniform and reproducible nanofibres, it is important to understand the effect of the different electrospinning parameters on the nanofibre morphology. Even though a lot of literature is available on the electrospinning of nanofibres, only minor research has been performed on the effect of the relative humidity (RH). This paper investigates the influence of this parameter on the electrospinning process and fibre morphology of the hydrophilic polyamide 4.6 and the less hydrophilic polyamide 6.9. First, the electrospinning process and deposition area of the nanofibres is examined at 10, 50 and 70 % RH. Subsequently, the effect of the polyamide concentration and solvent ratio on the fibre morphology is investigated using scanning electron microscopy and differential scanning calorimetry. It was found that the nanofibre diameter decreased with increasing RH. This resulted in less stable crystals for polyamide 4.6 while electrospinning of polyamide 6.9 at higher RH led to slightly more stable crystals. In conclusion, the water affinity of a polymer is an important factor in predicting the nanofibre morphology at different humidities. |
| Databáze: | OpenAIRE |
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