MECHANICAL AND STRUCTURAL PROPERTIES OF POLYLACTIDE/CHITOSAN SCAFFOLDS REINFORCED WITH NANO-CALCIUM PHOSPHATE

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JAFARKHANI MAHBOUBEH; FAZLALI ALIREZA; MOZTARZADEH FATHOLLAH; MOZAFARI MASOUD

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Journal: Iranian Polymer Journal Year:2012 | Volume:21 | Issue:10 Page(s): 713-720

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Title

MECHANICAL AND STRUCTURAL PROPERTIES OF POLYLACTIDE/CHITOSAN SCAFFOLDS REINFORCED WITH NANO-CALCIUM PHOSPHATE

Author(s)

JAFARKHANI MAHBOUBEH | FAZLALI ALIREZA | MOZTARZADEH FATHOLLAH | MOZAFARI MASOUD

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Abstract

In this study, chitosan/polylactide scaffolds reinforced with nano-calcium phosphate (average crystallite size of 16.5 nm) (CP) were fabricated to create a material with excellent properties for bone tissue engineering applications via freeze-casting method. The structural and mechanical properties of nano composite scaffolds were studied by increasing amount of chitosan/poly lactide ratio and nano-CP content in both dry and hydrate states, which reflected the exact status of scaffolds in a real biomechanical environment. The morphologies of the nano composite scaffolds were viewed using scanning electron microscopy (SEM) and all the scaffolds exhibited a high porosity (up to 92 %) with open pores of 38–387 μm average diameters, which decreased with increased chitosan/polylactide ratio and nano-CP content. Also, SEM photograph of the cross-sectional area of the scaffold showed nano-CP was dispersed all over the polymer matrix thoroughly. The results of mechanical tests showed that the compressive modulus (E) and compressive stress (s) enhanced, when chitosan and nano-CP increased. X-ray diffraction analysis indicated typical chitosan, polylactic acid and nano-CP peaks and showed that the increase in nano-CP weight percentage increased its peak intensities. In addition, the effect of pore-size distributions of the scaffolds with the same composition was studied in relation to mechanical properties. The results showed substantial differences in the pore-size distributions of scaffolds with the same composition prepared, which have no effect on their dry states.

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APA: Copy

JAFARKHANI, MAHBOUBEH, FAZLALI, ALIREZA, MOZTARZADEH, FATHOLLAH, & MOZAFARI, MASOUD. (2012). MECHANICAL AND STRUCTURAL PROPERTIES OF POLYLACTIDE/CHITOSAN SCAFFOLDS REINFORCED WITH NANO-CALCIUM PHOSPHATE. IRANIAN POLYMER JOURNAL (ENGLISH), 21(10), 713-720. SID. https://sid.ir/paper/634306/en

Vancouver: Copy

JAFARKHANI MAHBOUBEH, FAZLALI ALIREZA, MOZTARZADEH FATHOLLAH, MOZAFARI MASOUD. MECHANICAL AND STRUCTURAL PROPERTIES OF POLYLACTIDE/CHITOSAN SCAFFOLDS REINFORCED WITH NANO-CALCIUM PHOSPHATE. IRANIAN POLYMER JOURNAL (ENGLISH)[Internet]. 2012;21(10):713-720. Available from: https://sid.ir/paper/634306/en

IEEE: Copy

MAHBOUBEH JAFARKHANI, ALIREZA FAZLALI, FATHOLLAH MOZTARZADEH, and MASOUD MOZAFARI, “MECHANICAL AND STRUCTURAL PROPERTIES OF POLYLACTIDE/CHITOSAN SCAFFOLDS REINFORCED WITH NANO-CALCIUM PHOSPHATE,” IRANIAN POLYMER JOURNAL (ENGLISH), vol. 21, no. 10, pp. 713–720, 2012, [Online]. Available: https://sid.ir/paper/634306/en

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