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Dynamic mechanical properties and in vitro bioactivity of PHBHV/HA nanocomposite

Authorized Users Only
2007
Authors
Chen, D. Z.
Tang, C. Y.
Chan, K. C.
Tsui, C. P.
Yu, Peter H. F.
Leung, Mason C. P.
Uskoković, Petar
Article (Published version)
Metadata
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Abstract
Biopolymer composite materials for potential medical applications are of current research interest. In this study, a nanocomposite based on bioresorbable polymer-poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBHV) was prepared by the incorporation of nano-sized hydroxyapatite (nano-HA) using a solution casting method. Homogeneous distribution of nanoparticles in the polymer matrix was validated by the observation of field emission scanning electron microscope (FE-SEM). The dynamic mechanical properties, thermal properties, and bioactivity of the natiocomposite were examined by using varieties of techniques including dynamic mechanical analyser (DMA), differential scanning calorimeter (DSC), thermogravimetric analyzer (TGA), scanning electron microscope coupled with energy dispersive X-ray analysis detector (SEM + EDXA), Fourier transforms infra-red spectrometer (FT-IR) and thin-film X-ray diffractometer (TF-XRD). The results indicated that the storage modulus (E') of PHBHV was conside...rably improved with the introduction of nano-HA. For an instance of examination at I Hz, the PHBHV/HA (100/30) nanocomposite showed an increment of 41.2% at -50 degrees C and 99.1% at 75 degrees C in E' as compared with the polymer matrix. It was also found that higher testing frequencies used induce more elastic-like behavior. With the increase in the amount of nano-HA, both the glass transition temperature (T-g) and the activation energy (Delta E) for the glass transition increased, while the tangent of loss angle (tan delta) decreased due to the hindrance of the nanofillers to the mobility of the polymer segments. The thermal experiments revealed that, when incorporating HA nanoparticles, the decomposition of the polymer matrix was accelerated at the initial stage but postponed thereafter. The addition of nano-HA also resulted in a decrement in the melting enthalpy of PHBHV. The in vitro investigation indicated that the nanocomposite has an improved bioactivity over the conventional one.

Keywords:
polymer-matrix composites (PMCs) / nanostructures / mechanical properties / bioactivity
Source:
Composites Science and Technology, 2007, 67, 7-8, 1617-1626
Publisher:
  • Elsevier Sci Ltd, Oxford

DOI: 10.1016/j.compscitech.2006.07.034

ISSN: 0266-3538

WoS: 000246253200033

Scopus: 2-s2.0-33847793097
[ Google Scholar ]
124
104
URI
http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1099
Collections
  • Radovi istraživača / Researchers’ publications (TMF)
Institution/Community
Tehnološko-metalurški fakultet
TY  - JOUR
AU  - Chen, D. Z.
AU  - Tang, C. Y.
AU  - Chan, K. C.
AU  - Tsui, C. P.
AU  - Yu, Peter H. F.
AU  - Leung, Mason C. P.
AU  - Uskoković, Petar
PY  - 2007
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1099
AB  - Biopolymer composite materials for potential medical applications are of current research interest. In this study, a nanocomposite based on bioresorbable polymer-poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBHV) was prepared by the incorporation of nano-sized hydroxyapatite (nano-HA) using a solution casting method. Homogeneous distribution of nanoparticles in the polymer matrix was validated by the observation of field emission scanning electron microscope (FE-SEM). The dynamic mechanical properties, thermal properties, and bioactivity of the natiocomposite were examined by using varieties of techniques including dynamic mechanical analyser (DMA), differential scanning calorimeter (DSC), thermogravimetric analyzer (TGA), scanning electron microscope coupled with energy dispersive X-ray analysis detector (SEM + EDXA), Fourier transforms infra-red spectrometer (FT-IR) and thin-film X-ray diffractometer (TF-XRD). The results indicated that the storage modulus (E') of PHBHV was considerably improved with the introduction of nano-HA. For an instance of examination at I Hz, the PHBHV/HA (100/30) nanocomposite showed an increment of 41.2% at -50 degrees C and 99.1% at 75 degrees C in E' as compared with the polymer matrix. It was also found that higher testing frequencies used induce more elastic-like behavior. With the increase in the amount of nano-HA, both the glass transition temperature (T-g) and the activation energy (Delta E) for the glass transition increased, while the tangent of loss angle (tan delta) decreased due to the hindrance of the nanofillers to the mobility of the polymer segments. The thermal experiments revealed that, when incorporating HA nanoparticles, the decomposition of the polymer matrix was accelerated at the initial stage but postponed thereafter. The addition of nano-HA also resulted in a decrement in the melting enthalpy of PHBHV. The in vitro investigation indicated that the nanocomposite has an improved bioactivity over the conventional one.
PB  - Elsevier Sci Ltd, Oxford
T2  - Composites Science and Technology
T1  - Dynamic mechanical properties and in vitro bioactivity of PHBHV/HA nanocomposite
EP  - 1626
IS  - 7-8
SP  - 1617
VL  - 67
DO  - 10.1016/j.compscitech.2006.07.034
ER  - 
@article{
author = "Chen, D. Z. and Tang, C. Y. and Chan, K. C. and Tsui, C. P. and Yu, Peter H. F. and Leung, Mason C. P. and Uskoković, Petar",
year = "2007",
abstract = "Biopolymer composite materials for potential medical applications are of current research interest. In this study, a nanocomposite based on bioresorbable polymer-poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBHV) was prepared by the incorporation of nano-sized hydroxyapatite (nano-HA) using a solution casting method. Homogeneous distribution of nanoparticles in the polymer matrix was validated by the observation of field emission scanning electron microscope (FE-SEM). The dynamic mechanical properties, thermal properties, and bioactivity of the natiocomposite were examined by using varieties of techniques including dynamic mechanical analyser (DMA), differential scanning calorimeter (DSC), thermogravimetric analyzer (TGA), scanning electron microscope coupled with energy dispersive X-ray analysis detector (SEM + EDXA), Fourier transforms infra-red spectrometer (FT-IR) and thin-film X-ray diffractometer (TF-XRD). The results indicated that the storage modulus (E') of PHBHV was considerably improved with the introduction of nano-HA. For an instance of examination at I Hz, the PHBHV/HA (100/30) nanocomposite showed an increment of 41.2% at -50 degrees C and 99.1% at 75 degrees C in E' as compared with the polymer matrix. It was also found that higher testing frequencies used induce more elastic-like behavior. With the increase in the amount of nano-HA, both the glass transition temperature (T-g) and the activation energy (Delta E) for the glass transition increased, while the tangent of loss angle (tan delta) decreased due to the hindrance of the nanofillers to the mobility of the polymer segments. The thermal experiments revealed that, when incorporating HA nanoparticles, the decomposition of the polymer matrix was accelerated at the initial stage but postponed thereafter. The addition of nano-HA also resulted in a decrement in the melting enthalpy of PHBHV. The in vitro investigation indicated that the nanocomposite has an improved bioactivity over the conventional one.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Composites Science and Technology",
title = "Dynamic mechanical properties and in vitro bioactivity of PHBHV/HA nanocomposite",
pages = "1626-1617",
number = "7-8",
volume = "67",
doi = "10.1016/j.compscitech.2006.07.034"
}
Chen, D. Z., Tang, C. Y., Chan, K. C., Tsui, C. P., Yu, P. H. F., Leung, M. C. P.,& Uskoković, P.. (2007). Dynamic mechanical properties and in vitro bioactivity of PHBHV/HA nanocomposite. in Composites Science and Technology
Elsevier Sci Ltd, Oxford., 67(7-8), 1617-1626.
https://doi.org/10.1016/j.compscitech.2006.07.034
Chen DZ, Tang CY, Chan KC, Tsui CP, Yu PHF, Leung MCP, Uskoković P. Dynamic mechanical properties and in vitro bioactivity of PHBHV/HA nanocomposite. in Composites Science and Technology. 2007;67(7-8):1617-1626.
doi:10.1016/j.compscitech.2006.07.034 .
Chen, D. Z., Tang, C. Y., Chan, K. C., Tsui, C. P., Yu, Peter H. F., Leung, Mason C. P., Uskoković, Petar, "Dynamic mechanical properties and in vitro bioactivity of PHBHV/HA nanocomposite" in Composites Science and Technology, 67, no. 7-8 (2007):1617-1626,
https://doi.org/10.1016/j.compscitech.2006.07.034 . .

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