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Preparation and characterization of plasticized starch/halloysite porous nanocomposites possibly suitable for biomedical applications
Author(s) -
Schmitt Helene,
Creton Nicolas,
Prashantha Kalappa,
Soulestin Jeremie,
Lacrampe MarieFrance,
Krawczak Patricia
Publication year - 2015
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.41341
Subject(s) - halloysite , materials science , porosity , extrusion , starch , blowing agent , nanocomposite , composite material , chemical engineering , glycerol , chemistry , polyurethane , organic chemistry , engineering
Novel porous bionanocomposites based on halloysite nanotubes as nanofillers and plasticized starch as polymeric matrix were successfully prepared by melt‐extrusion. Foaming was obtained by adding water as natural blowing agent, and by increasing the die temperature. Both the expansion ratio and the porosity increase with increasing die temperature. Addition of high water content allows reducing the foaming temperature. Moreover, the introduction of halloysite has double benefits: these fillers act both as a nucleating agent increasing the porosity and as a barrier agent increasing the proportion of small cells. Foams based on plasticized starch with a blend of glycerol and sorbitol loaded with 6 wt % of halloysite, extruded at 117°C, present the cellular structure and the mechanical properties required for scaffold applications. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41341.