Spectroscopy and Spectral Analysis, Volume. 32, Issue 5, 1418(2012)
Biomimetic Mineralization of Rod-Like Cellulose Nano-Whiskers and Spectrum Analysis
Cellulose nano-whiskers/nano-hydroxyapatite composite was prepared with biomimetic mineralization using rod-like cellulose nano-whiskers as template. The cellulose nano-whiskers and cellulose nano-whiskers /nano-hydroxyapatite composite were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscope-energy dispersive analysis of X-rays (SEM-EDXA). Variation and distribution of carbon, oxygen, calcium, and phosphorus in the composites were studied. The morphologies and growth mechanism of nano-hydroxyapatite were analyzed. The results showed that nano-hydroxyapatite was formed on the surface of cellulose nano-whiskers; the carbon-oxygen ratio of cellulose nano-whiskers and cellulose nano-whiskers/nano-hydroxyapatite composite was 1.81 and 1.54, respectively; the calcium-phosphorus ratio of the composite was 1.70. The nucleation of nano-hydroxyapatite was around the hydroxyl groups of cellulose nano-whiskers. It is suggested that there is coordination between the hydroxyl groups of cellulose nano-whiskers and calcium ions of nano-hydroxyapatite. The nano-hydroxyapatite can distribute in the matrix of cellulose nano-whiskers. From the atomic force microscope (AFM) images, we can see that the diameter of the spherical nano-hydroxyapatite particles was about 20 nm.
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QU Ping, WANG Xuan, CUI Xiao-xia, ZHANG Li-ping. Biomimetic Mineralization of Rod-Like Cellulose Nano-Whiskers and Spectrum Analysis[J]. Spectroscopy and Spectral Analysis, 2012, 32(5): 1418
Received: Sep. 26, 2011
Accepted: --
Published Online: Jun. 14, 2012
The Author Email: Ping QU (qupinghappy@163.com)