Thermomechanical properties of poly(lactic acid) films reinforced with hydroxyapatite and regenerated cellulose microfibers

ABSTRACT Novel composite films constituted of poly(lactic acid) (PLA), hydroxyapatite (HAp), and two types of regenerated cellulose fillers—particulate and fibrous type—were produced by melt extrusion in a twin‐screw micro‐compounder. The effect of the film composition on the tensile and dynamic mec...

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Bibliographic Details
Published in:Journal of applied polymer science 2014-10, Vol.131 (20), p.np-n/a
Main Authors: Mahboubi Soufiani, Arman, Salehi, Masoud, Skrifvars, Mikael, Persson, Maria, Cho, Sung-Woo
Format: Article
Language:English
Subjects:
Applied sciences
biodegradable composite
Biological and medical sciences
biomaterials
Biomedical materials
Bones
Cellulose
cellulose and other wood products
Composites
Exact sciences and technology
Extrusion
Forms of application and semi-finished materials
Hydroxyapatite
Materials science
Mechanical properties
Medical sciences
Particulate composites
polylactic acid
Polymer industry, paints, wood
Polymers
Resource Recovery
Resursåtervinning
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Surgical implants
Technology of polymers
Technology. Biomaterials. Equipments
thermal properties
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Summary:ABSTRACT Novel composite films constituted of poly(lactic acid) (PLA), hydroxyapatite (HAp), and two types of regenerated cellulose fillers—particulate and fibrous type—were produced by melt extrusion in a twin‐screw micro‐compounder. The effect of the film composition on the tensile and dynamic mechanical behavior and the HAp dispersion in the PLA matrix were investigated thoroughly. Appearance of crazed regions and prevention of HAp aggregation in the PLA matrix were elucidated in the composites with up to 15 wt % particulate cellulose content, which was the main reason for only slight reduction in the tensile properties, and consequently trivial degradation of their pre‐failure energy absorption as compared to neat PLA films. Superior dynamical energy storage capacities were obtained for the particulate cellulose modified composites, while their fibrous counterparts had not as good properties. Additionally, the anisotropic mechanical behavior obtained for the extruded composites should be favorable for use as biomaterials aimed at bone tissue engineering applications. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40911.
ISSN:0021-8995
1097-4628
1097-4628
DOI:10.1002/app.40911