Polymeric Shape-Memory Micro-Patterned Surface for Switching Wettability with Temperature

Polymers

Nuria Garc໚-Huete¹  José Mar໚ Cuevas³  José Manuel Laza²  José Luis Vilas¹  Luis Manuel León¹ 

[1] Basque Center for Materials, Applications and Nanostructures (BCMaterials), Parque Tecnológico de Bizkaia, Ed. 500, Derio 48160, Spain; E-Mails:;Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco/EHU, Apdo. 644, Bilbao E-48080, Spain; E-Mail:;Gaiker Technology Centre, Parque Tecnológico de Bizkaia, Ed. 202, Zamudio 48170, Spain; E-Mail:

关键词: shape memory polymer;    laser ablation;    wettability;    patterning;    water contact angle;    thermomechanical analysis;   

DOI  :  10.3390/polym7091477

来源: mdpi

【 摘 要 】

An innovative method to switch the wettability of a micropatterned polymeric surface by thermally induced shape memory effect is presented. For this purpose, first polycyclooctene (PCO) is crosslinked with dicumyl peroxide (DCP) and its melting temperature, which corresponds with the switching transition temperature (T_trans), is measured by Dynamic Mechanical Thermal Analysis (DMTA) in tension mode. Later, the shape memory behavior of the bulk material is analyzed under different experimental conditions employing a cyclic thermomechanical analysis (TMA). Finally, after creating shape memory micropillars by laser ablation of crosslinked thermo-active polycyclooctene (PCO), shape memory response and associated effect on water contact angle is analyzed. Thus, deformed micropillars cause lower contact angle on the surface from reduced roughness, but the original hydrophobicity is restored by thermally induced recovery of the original surface structure.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.