Breath figures makes porous the “so-called” skin layer obtained in polymer foams prepared by supercritical CO2 treatments
作者： Alberto Gallardo , Juan Rodriguez-Hernandez , Carlos Elvira , Raúl Sanz-Horta , Enrique Martinez-Campos
DOI: 10.1016/J.SUPFLU.2020.105051
关键词: Methacrylate 、 Foaming agent 、 Scanning electron microscope 、 Polymer 、 Supercritical fluid 、 Porosity 、 Biocompatibility 、 Materials science 、 Layer (electronics) 、 Composite material
摘要: Abstract In this article, the preparation of porous polymeric scaffolds synthetic poly (isopropylideneglycerol methacrylate) (PIPGMA) is described combining two complementary techniques. Supercritical CO2 (SCCO2), has been used as foaming agent to obtain internal porosity by varying parameters such pressure and depressurization time. However, disadvantage SCCO2 technology formation a non-porous skin layer in majority samples. This was modified breath figures technique (BF), providing superficial sample. The result using both techniques subsequently showed network throughout samples with inner outer pores interconnected, characterized scanning electron microscopy (SEM), micro X-ray computerized tomography (micro CT), processing those images Image J. Finally, preliminary biological evaluation carried out order evaluate biocompatibility cellular viability these scaffolds.
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