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• W1982966055 abstract "Hydroxyapatite (HA)/polysaccharide composites have been widely used in bone tissue engineering due to their chemical similarity to natural bone. Polymer matrix-mediated synthesis of nano-hydroxyapatite is one of the simplest models for biomimetic. In this article, the nano-hydroxyapatite/chitosan–pectin (nHCP) composites were prepared through in situ mineralization of hydroxyapatite in chitosan–pectin polyelectrolyte complex (PEC) network. The formation processes of nHCP were investigated by X-ray diffraction (XRD) analysis. The interactions between nHA crystal and chitosan–pectin PEC networks were studied using Fourier Transform Infrared Spectroscopy (FTIR) and Differential Scanning Calorimetry (DSC). The morphology and structure of nHA crystal were characterized by XRD and Transmission Electron Microscope (TEM). Results suggested that the interfacial interactions between nano-hydroxyapatite crystal and chitosan–pectin PEC network assist the site specific nucleation and growth of nHA nanoparticles. The nHA crystals grow along the c-axis. In this process, pH value is the main factor to control the nucleation and growth of nHA crystal in chitosan–pectin PEC networks, because both the interactions' strength between nHA crystal and chitosan–pectin and diffusion rate of inorganic ions depend on the pH value of the reaction system. Apart from the pH value, the chitosan/pectin ratio and [Ca2+] also take important effects on the formation of nHA crystal. An effective way to control the size of nHA crystal is to adjust the content of pectin and [Ca2+]. It is interesting that the Zeta potential of nHCP composites is about − 30 mV when the chitosan/pectin ratio ≦ 1:1, and the dispersion solution of nHCP composites has higher stability, which provides the possibility to prepare 3D porous scaffolds with nHCP for bone tissue engineering." @default.
• W1982966055 created "2016-06-24" @default.
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• W1982966055 date "2010-07-01" @default.
• W1982966055 modified "2023-10-15" @default.
• W1982966055 title "Formation of nano-hydroxyapatite crystal in situ in chitosan–pectin polyelectrolyte complex network" @default.
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• W1982966055 doi "https://doi.org/10.1016/j.msec.2010.03.011" @default.
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