کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
230848 1427400 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Towards superhydrophobic coatings made by non-fluorinated polymers sprayed from a supercritical solution
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Towards superhydrophobic coatings made by non-fluorinated polymers sprayed from a supercritical solution
چکیده انگلیسی

The objective of this study was to create a superhydrophobic surface using polymers that are non-fluorinated and applying them to a surface via rapid expansion of a supercritical solution (RESS). Solubility studies of poly(ɛ-caprolactone) (PCL) and a statistical copolymer of vinyl acetate and vinyl pivalate (P(VAc-VPi))in supercritical carbon dioxide (scCO2) were carried out using an extraction procedure. It was found that the most suitable process parameters for spraying these polymers using the RESS technique were 30 MPa, 40 °C and 10% (v/v) acetone as a co-solvent. The surfaces produced were characterized in terms of their morphology and hydrophobic properties by scanning electron microscopy and contact angle measurements, respectively. The most hydrophobic surfaces were obtained by spraying the P(VAc-VPi) copolymers, giving advancing water contact angles in the range of 120–155° due to the hydrophobic character of the polymer and the microstructure formed with the RESS technique. These results show great promise for the creation of superhydrophobic surfaces using non-fluorinated polymers applied to surfaces via RESS technique.

Figure optionsDownload as PowerPoint slideHighlights
► RESS was used to create surface coatings by spraying non-fluorinated polymers.
► High contact angles (120–156°) were obtained by spraying an amorphous copolymer.
► Melt and solution casting gave reference surfaces with much lower contact angles.
► Spraying from RESS gave surface morphologies with superhydrophobic properties.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Supercritical Fluids - Volume 77, May 2013, Pages 134–141
نویسندگان
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