Journal
INTERNATIONAL JOURNAL OF POLYMERIC MATERIALS AND POLYMERIC BIOMATERIALS
Volume 68, Issue 7, Pages 411-416Publisher
TAYLOR & FRANCIS AS
DOI: 10.1080/00914037.2018.1452225
Keywords
Chitosan; cryogelation; hierarchical; macroporous; phase separation; scaffold
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Hierarchical porous chitosan cryogels were prepared by combination of cryogelation and phase separation techniques. n-Butanol was included as a non-solvent in the initial polymer solutions to enable phase separation. The internal morphology of the resulting cryogels revealed hierarchical porosity where larger pores of between 25-50 mu m were formed via cryogelation, whereas smaller pores of between 4-10 mu m were produced by phase separation. The control sample prepared without n-butanol exhibited monotype porosity. Any crack development was not observed when samples were compressed up to 80% strain. The results demonstrated hierarchical porous and tough scaffolds with potential use in tissue engineering. [GRAPHICS] .
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