Surface geometry based hydrophobicity of the PDMS for microfluidic devices

Autor:	Rommel G. Bacabac, Renante Violanda, Unofre Pili, J C Pelayo, J Castañares, R A Badiola
Rok vydání:	2015
Předmět:	Contact angle Materials science Microfluidics technology industry and agriculture Analytical chemistry Surface roughness Surface geometry macromolecular substances Composite material Elastomer Curing (chemistry)
Zdroj:	IOP Conference Series: Materials Science and Engineering. 79:012027
ISSN:	1757-899X 1757-8981
DOI:	10.1088/1757-899x/79/1/012027
Popis:	In this report, the surface hydrophobicity of PDMS was investigated using two methods of preparations. The first method was performed by changing the surface roughness through the use of different molds. The second method was performed by varying the reconstitution ratio (volume of elastomer base to volume of elastomer curing) of the PDMS. Variation in the hydrophobicity of the PDMS was characterized by measuring the contact angle of a liquid droplet against the surface of the PDMS. The results showed that both the surface roughness and the reconstitution ratio of the PDMS positively correlated with the contact angle measured regardless of the liquid used. The maximum and minimum contact angle obtained were θr = (138 ± 3)° and θr = (99 ± 3)°, respectively. The results demonstrate a straightforward way of fabricating microfluidic devices using PDMS with controlled hydrophobicity.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::79887fed98d92607e9bcb0d52d42bf9f https://doi.org/10.1088/1757-899x/79/1/012027 Zobrazit plný text záznamu