TY - JOUR
T1 - Cellulose acetate and short curauá fibers biocomposites prepared by large scale processing
T2 - Reinforcing and thermal insulating properties
AU - Gutiérrez, Miguel Chávez
AU - De Paoli, Marco Aurelio
AU - Felisberti, Maria Isabel
N1 - Funding Information:
M. Chavez G. acknowledges a fellowship from CAPES – program PEC-PG. The authors acknowledge Prof. C.H. Collins for manuscript revision, FAPESP ( 2010/02098-0 and 2010/17804-7 ) for financial support and EMBRAPA-PA for donation of the fibers.
Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2014/1
Y1 - 2014/1
N2 - Biocomposites from renewable resource and based on cellulose acetate, dioctyl phthalate and short curauá fibers were prepared by large scale extrusion and injection molding and their mechanical, morphological and thermal properties were studied as a function of plasticizer (dioctyl phthalate) and fiber contents, as well as chemical treatment of the fibers: treatment with NaOH solution or extraction with acetone. The chemical treatments of the fibers play an important role on the mechanical and thermal properties, increasing the Young's modulus (up to 50%), the thermal dimensional stability and the thermal conductivity (ca. 100%) and decreasing the impact strength (ca. 50%) of the composites in comparison with plasticized cellulose acetate. Plasticizer and fibers influence the properties of the biocomposites in the opposite way. Thus the properties of complete and functional formulations of biocomposites of cellulose acetate, plasticizer and curauá fibers with potential of applications and produced by a conventional polymer processing such as extrusion and injection molding can be tailored by controlling the amount and the characteristics of the additives. Among semi-empirical models used to describe the mechanical properties, the Cox-Krenchel and ROM mathematical model showed to be more suitable to describe the Young's modulus of the biocomposites.
AB - Biocomposites from renewable resource and based on cellulose acetate, dioctyl phthalate and short curauá fibers were prepared by large scale extrusion and injection molding and their mechanical, morphological and thermal properties were studied as a function of plasticizer (dioctyl phthalate) and fiber contents, as well as chemical treatment of the fibers: treatment with NaOH solution or extraction with acetone. The chemical treatments of the fibers play an important role on the mechanical and thermal properties, increasing the Young's modulus (up to 50%), the thermal dimensional stability and the thermal conductivity (ca. 100%) and decreasing the impact strength (ca. 50%) of the composites in comparison with plasticized cellulose acetate. Plasticizer and fibers influence the properties of the biocomposites in the opposite way. Thus the properties of complete and functional formulations of biocomposites of cellulose acetate, plasticizer and curauá fibers with potential of applications and produced by a conventional polymer processing such as extrusion and injection molding can be tailored by controlling the amount and the characteristics of the additives. Among semi-empirical models used to describe the mechanical properties, the Cox-Krenchel and ROM mathematical model showed to be more suitable to describe the Young's modulus of the biocomposites.
KW - Cellulose acetate
KW - Extrusion
KW - Injection molding
KW - Lignocellulosic fibers
KW - Mechanical properties
KW - Thermal insulating properties
UR - http://www.scopus.com/inward/record.url?scp=84888812527&partnerID=8YFLogxK
U2 - 10.1016/j.indcrop.2013.10.054
DO - 10.1016/j.indcrop.2013.10.054
M3 - Artículo
AN - SCOPUS:84888812527
SN - 0926-6690
VL - 52
SP - 363
EP - 372
JO - Industrial Crops and Products
JF - Industrial Crops and Products
ER -