title: [Biomimetic mineralization of rod-like cellulose nano-whiskers and spectrum analysis].
abstract: 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.
authors: College of Material Science and Technology, Beijing Forestry University, Beijing, China. quqinghappy@163.com
authors: Ping
authors: P
authors: Qu
authors: Xuan
authors: X
authors: Wang
authors: Xiao-xia
authors: XX
authors: Cui
authors: Li-ping
authors: LP
authors: Zhang
mesh_terms: D032701:Biomimetics; D002482:Cellulose / Q000737:chemistry*; D017886:Durapatite / Q000737:chemistry*; D049329:Nanostructures; D056951:Photoelectron Spectroscopy; D014961:X-Ray Diffraction
chemical_list: D002482:Cellulose; D017886:Durapatite