Contact Angle Hysteresis on Polymer Substrates Established with Various Experimental Techniques, Its Interpretation, and Quantitative Characterization

详细信息    查看全文

• 作者：Edward Bormashenko ; Yelena Bormashenko ; Gene Whyman ; Roman Pogreb ; Albina Musin ; Rachel Jager ; Zahava Barkay
• 刊名：Langmuir
• 出版年：2008
• 出版时间：April 15, 2008
• 年：2008
• 卷：24
• 期：8
• 页码：4020 - 4025
• 全文大小：198K
• 年卷期：v.24,no.8(April 15, 2008)
• ISSN：1520-5827

文摘

The effect of contact angle hysteresis (CAH) was studied on various polymer substrates with traditional and newexperimental techniques. The new experimental technique presented in the article is based on the slow deformationof the droplet, thus CAH is studied under the constant volume of the drop in contrast to existing techniques whenthe volume of the drop is changed under the measurement. The energy of hysteresis was calculated in the frameworkof the improved Extrand approach. The advancing contact angle established with a new technique is in a goodagreement with that measured with the needle-syringe method. The receding angles measured with three experimentaltechniques demonstrated a very significant discrepancy. The force pinning the triple line responsible for hysteresiswas calculated.