Title of article :
The development and characterization of a novel chitosan/carbonised yucca (Yucca flaccida) bio-composite
Author/Authors :
Krzesi?ska، نويسنده , , Marta and Majewska، نويسنده , , Justyna، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2010
Pages :
4
From page :
273
To page :
276
Abstract :
The aim of the study was to fabricate a biodegradable bio-composite using only natural biological precursors for both composite components, i.e., for a support and for a filler. Bio-composites of biomorphous structure were prepared using monolithic blocks of yucca (Yucca flaccida) carbonised at 550 °C as a stiff porous skeleton, and chitosan as a filler that coated the internal surface of the skeleton by a thin film. Highly porous supports and the resultant biomorphous composites were characterized by means of TGA, SEM, low-temperature physical adsorption of nitrogen, as well as electric and ultrasonic measurements. The resultant bio-composites were found to be very light materials with density of about 0.13 g/cm3 and very porous (over 90%). They were found to be hierarchically ordered anisotropic structures with a stiff skeleton of dynamic elastic moduli up to 0.8 GPa. The specific surface area was found to be 72 m2/g giving a surface area of chitosan film equal to about 12 m2 for a block sample of a volume of 2 cm3. Covering porous support by thin film of chitosan resulted in the increase of electrical conductivity of the resultant composite.
Keywords :
YUCCA , Scanning electron microscopy (SEM) , Porous structure , Bio-composite , Chitosan , ultrasonics
Journal title :
Materials Science and Engineering C
Serial Year :
2010
Journal title :
Materials Science and Engineering C
Record number :
2100740
Link To Document :
بازگشت