TY - JOUR
T1 - Biocomposites based on cellulose acetate and short curauá fibers
T2 - Effect of plasticizers and chemical treatments of the fibers
AU - Gutiérrez, Miguel Chávez
AU - De Paoli, Marco Aurelio
AU - Felisberti, Maria Isabel
N1 - Funding Information:
M. Chavez acknowledges a fellowship from the CAPES PEC-PG program. The authors acknowledge Prof. C.H. Collins for manuscript revision, FAPESP (2010/17804-7 and 2010/2098-0) and PETROBRAS (Process No. 11 P-06662-2008) for financial support and EMBRAPA-PA for donation of fibers.
Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2012/8
Y1 - 2012/8
N2 - Biocomposites based on cellulose acetate and short curauá fibers were prepared by extrusion on a laboratory scale. The influence on the mechanical and thermal properties of the biocomposites caused by three different plasticizers, dioctyl phthalate (DOP), triethyl acetate (TEC) and glycerol triacetate (GTA), and the chemical treatment of the fibers was evaluated. The fibers were mercerized or extracted with acetone. The efficiency of the plasticizers was determined by their molecular features, however, for some applications DOP can be replaced by less hazardous plasticizers, such as TEC and GTA. The biocomposites presented morphology of fibrils uniformly dispersed in the polymer matrices and higher Young's modulus, higher thermal dimensional stability and lower thermal conductivity in comparison with the properties of the corresponding plasticized polymer matrices. Moreover, these biocomposites combine mechanical and dimensional properties of dense materials with thermal conductivities of porous and thermally insulating polymers.
AB - Biocomposites based on cellulose acetate and short curauá fibers were prepared by extrusion on a laboratory scale. The influence on the mechanical and thermal properties of the biocomposites caused by three different plasticizers, dioctyl phthalate (DOP), triethyl acetate (TEC) and glycerol triacetate (GTA), and the chemical treatment of the fibers was evaluated. The fibers were mercerized or extracted with acetone. The efficiency of the plasticizers was determined by their molecular features, however, for some applications DOP can be replaced by less hazardous plasticizers, such as TEC and GTA. The biocomposites presented morphology of fibrils uniformly dispersed in the polymer matrices and higher Young's modulus, higher thermal dimensional stability and lower thermal conductivity in comparison with the properties of the corresponding plasticized polymer matrices. Moreover, these biocomposites combine mechanical and dimensional properties of dense materials with thermal conductivities of porous and thermally insulating polymers.
KW - A. Polymer-matrix composites (PMCs)
KW - A. Vegetal fibres
KW - B. Mechanical properties
KW - B. Thermal properties
UR - http://www.scopus.com/inward/record.url?scp=84861332758&partnerID=8YFLogxK
U2 - 10.1016/j.compositesa.2012.03.006
DO - 10.1016/j.compositesa.2012.03.006
M3 - Artículo
AN - SCOPUS:84861332758
SN - 1359-835X
VL - 43
SP - 1338
EP - 1346
JO - Composites Part A: Applied Science and Manufacturing
JF - Composites Part A: Applied Science and Manufacturing
IS - 8
ER -