Molecular structure of an alkyl-side-chain polymer-water interface: origins of contact angle hysteresis

Langmuir : the ACS Journal of Surfaces and Colloids
Hasnain RangwallaAli Dhinojwala

Abstract

A new and direct approach to verify surface heterogeneity as the microscopic origin of contact-angle hysteresis is demonstrated. IR-visible sum-frequency-generation spectroscopy (SFG) was used to selectively probe the molecules at the interface of an alkyl-side-chain polymer [poly(vinyl n-octadecyl carbamate-co-vinyl acetate)] with water. The spectra indicate that in contact with water, the polymer surface is heterogeneous (having areas of differing surface energies). This evidence of surface heterogeneity supports the hysteresis observed in the advancing and receding contact angles of the polymer surface with water. The same measurements made for the chemically and structurally similar surface of an octadecyltrichlorosilane self-assembled monolayer indicates a homogeneous surface at the water interface. In this case, contact-angle hysteresis measurements implicate surface roughness as the cause of hysteresis. Atomic force microscopy measurements of roughness for these surfaces further support our conclusions. The polymer-water interface was probed using SFG at above-ambient temperatures, and an order-to-disorder transition (ODT) of alkyl side chains at the interface was observed, which closely follows the melting of crystallin...Continue Reading

References

Feb 9, 1989·Nature·D J CaponJ E Groopman
Oct 21, 2000·Physical Review Letters·K S GautamM S Yeganeh
Apr 17, 2002·Physical Review Letters·K S Gautam, A Dhinojwala
Jun 6, 2003·Physical Review Letters·Keshav S GautamAli Dhinojwala
May 6, 1994·Science·W R Hammer, W J Hickerson

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Citations

Jul 3, 2013·Journal of the American Chemical Society·Atsuomi ShundoKeiji Tanaka
Jul 17, 2012·Journal of Agricultural and Food Chemistry·Fang TianJulie M Goddard
Jan 22, 2009·The Journal of Chemical Physics·Kumar NanjundiahAli Dhinojwala
Mar 26, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Chihiro UrataAtsushi Hozumi
Aug 19, 2014·Physical Chemistry Chemical Physics : PCCP·Jeanne M HankettZhan Chen
Apr 17, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Motoyasu KobayashiAtsushi Takahara
Oct 16, 2010·Journal of Colloid and Interface Science·Cornelius B KristalynZhan Chen
Jan 20, 2009·Journal of Colloid and Interface Science·Jorge AmimPaulo B Miranda
Oct 27, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Jing ZhouAli Dhinojwala
Feb 19, 2008·Advances in Colloid and Interface Science·M A Rodríguez-ValverdeM A Cabrerizo-Vilchez
Jun 1, 2007·Advances in Colloid and Interface Science·H TavanaA W Neumann
May 27, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·He Zhu, Ali Dhinojwala
Jun 18, 2016·ACS Applied Materials & Interfaces·Yu ZhangAli Dhinojwala
Oct 26, 2005·Physical Review Letters·Kumar Nanjundiah, Ali Dhinojwala
Aug 27, 2009·The Journal of Physical Chemistry. B·Guifeng LiMohsen S Yeganeh
May 15, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Cornelius B KristalynZhan Chen
Aug 15, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Haris RetsosCostantino Creton
Mar 6, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Adrian P DefanteAli Dhinojwala
Jan 5, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Eun-Ho SohnJong-Chan Lee
Feb 11, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Adrian P DefanteAli Dhinojwala
Sep 1, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Young Gil MaDai-Soo Lee
Jul 26, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Chun ZhangDouglas E Hirt
Jun 28, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Lichao Gao, Thomas J McCarthy

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