Innovative procedure for precise deposition of wrinkled hydrogel films using direct inkjet printing

Materials & Design

Mauricio A. Sarabia-Vallejos¹  Juan Rodriguez-Hernandez²  Fernando E. Rodriguez-Umanzor³  Enrique Martínez-Campos⁴  C.A. Terraza⁵  Carmen M. González-Henríquez⁵ 

[1] Corresponding author at: Facultad de Ciencias Naturales, Matemáticas y del Medio Ambiente, Departamento de Química, Universidad Tecnológica Metropolitana, Las Palmeras 3360, 7800003 Ñuñoa, Santiago, Chile.;Instituto de Ingeniería Biológica y Medica, Escuela de Ingeniería, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile;Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación, Universidad Tecnológica Metropolitana, Ignacio Valdivieso 2409, 8940577 San Joaquín, Santiago, Chile;Departamento de Ingeniería Estructural y Geotecnia, Escuela de Ingeniería, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile;Facultad de Ciencias Naturales, Matemáticas y del Medio Ambiente, Departamento de Química, Universidad Tecnológica Metropolitana, Las Palmeras 3360, 7800003 Ñuñoa, Santiago, Chile;

关键词: Inkjet printing;    Drop-on-demand deposition;    Wrinkled hydrogel films;    Hierarchical patterns;   

DOI  :  

来源: DOAJ

【 摘 要 】

This manuscript presents an inkjet-based strategy to fabricate wrinkled hydrogel surfaces with controlled characteristics (period and amplitude). For this purpose, a monomer mixture containing a crosslinking agent, a hydrophilic monomer, and a photoinitiator were deposited onto polycarbonate substrates. Upon UV irradiation and controlled drying under a vacuum atmosphere, either one-generation or hierarchical two-generation wrinkles were formed. More interestingly, the wrinkle characteristics depend on the crosslinking agent and monomer concentration in the solution so that larger wrinkles were observed in diluted solutions. Equally, the wrinkle period and amplitude also gradually grow by increasing the number of deposited layers. Atomic force microscopy was carried out to finely characterize the wrinkle dimensions as well as their eventual preferential orientation and distribution. Besides, hydrogel surfaces have been evaluated in terms of cytocompatibility, given their potential interest for biomedical applications.

【 授权许可】

Unknown