Status : Verified
| Personal Name | Tajanlangit, Gianina Martha, A. |
|---|---|
| Resource Title | Fabrication of montmorillonite/polycaprolactone nanofiber mebrane via electrospinning method |
| Date Issued | 30 July 2016 |
| Abstract | Iron-modified montmorillonite-filled polycaprolactone nanofiber mats were produced via electrospinning using a fabricated set-up with varying applied voltage, flow rate, needle-tip-to-collector distance, and needle diameter. The voltage output of the fabricated high voltage (HV) generators was found to be 18.83 ± 0.06 kV and 11.86 ± 0.06 kV for the 19-kV and 12-kV HV generators, respectively. The effects of varying process parameters on various fibre characteristics were evaluated using a two-level fractional factorial experimental design. The fibre diameters showed wide distribution ranging from 40-2700 nm for all runs. The effect of voltage on fiber diameter differed with varying flow rate. At 32 ml/hr, the average fibre diameter decreased from 518.38 nm ± 289.37 nm to 466.43 nm ± 312.36 nm when the voltage is increased. At 42 ml/hr, the average fibre diameter decreased from 490.16 nm ± 325.10 nm to 419.81 nm ± 236.62 nm when the voltage was changed from 19 kV to 12 kV. The average fibre diameter was also found to decrease with flow rate when the tip-to-collector distance is 15 cm while the reverse occurred at 10 cm tip-to-collector distance. Bead formation was observed for all runs with more beads being formed at 12 kV applied voltage and 15 cm tip-to-collector distance. Larger beads were also observed at low voltage when the tip-to-collector distance is smaller. Electrospinning at 12 kV and 15 cm tip-to-collector distance resulted to mat weight of 2.28 mg/cm2 while a mat weight of 9.15 mg/cm2 was measured when 19 kV and 10 cm tip-to-collector distance was used. Increasing the needle diameter resulted to a wider but thinner mat. The effect of tip-to-collector distance on mat properties varied with voltage. The hydrophobicity of the mat was confirmed when the water contact angle was determined to be 133.23° ± 4.95°. The surface area was found to be 230.373 m2/g using the Barrett-Joyner-Halenda (BDH) method and the predominant pore size is 1.686 nm. |
| Degree Course | MS Materials Science and Engineering |
| Language | English |
| Keyword | electrospinning, nanofibers, composites |
| Material Type | Thesis/Dissertation |
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