Porous polyurethane films having biomimetic ordered open pores: Indentation properties

An, Suyeong; Kim, Byoung Soo; Lee, Jonghwi

doi:10.1016/j.jiec.2015.10.023

Cited by 8 publications

(1 citation statement)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…33 Porous polyurethane substrates have already been well characterized, 41 but unfortunately most porous polyurethanes do not possess an ordered pore structure and pore structure is present throughout the polyurethane matrix. 42,43 However, several methods have been studied to obtain ordered patterned polyurethane surfaces. Using an upside-down method, Cheng et al 44 prepared well-ordered porous polyurethane films using polystyrene microspheres, with pores sizes ranging from 1.53 mm to 3.12 mm.…”

Section: Methodsmentioning

confidence: 99%

Preparation of ordered mesoporous and macroporous thermoplastic polyurethane surfaces for potential medical applications

et al. 2018

View full text Add to dashboard Cite

Thermoplastic polyurethanes are widely used in medical devices. In order to limit some of their shortfalls, like microbial attachment, surfaces modifications can be required. In this work, a two-step replication method was used to create ordered macroporous and mesoporous thermoplastic polyurethane surfaces using anodic aluminum oxide as master template. The intermediate mould materials that were tested were polystyrene and a polyacrylate resin with inorganic filler. All obtained surfaces were characterized by scanning electron microscopy. The initial anodic aluminum oxide surfaces possessed macro or mesopores, function of anodization conditions. The intermediate mould structure correctly replicated the pattern, but the polystyrene surface structures (pillars) were less resistant than the polyacrylate resin ones. The thermoplastic polyurethane pattern possessed macropores or mesopores of about 130 nm or 46 nm diameter and of about 300 nm or 99 nm interpore distances, respectively, in accordance with the initial pattern. Thermoplastic polyurethanes pore depth was however less than initial anodic aluminum oxide pore depth, linked to an incomplete replication during intermediate mould preparation (60 to 90% depth replication). The correct replication of the original pattern confirms that this novel fabrication method is a promising route for surface patterning of thermoplastic polyurethanes that could be used for medical applications.

show abstract