Affiliation:
1. Southwest University of Science and Technology
Abstract
The fibri-form silica was successfully synthesized from the short chrysotile fibers by inorganic acid-leaching. X-ray fluorescence analysis (XRF), X-ray diffraction (XRD), thermogravimetry and differential thermal analysis (TG-DTA), scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FT-IR) and N2adsorption isotherms were used to characterize the products. The results indicate that the fibri-form silica is a kind of noncrystalline material, and the content of SiO2in the fibri-form silica is 98.30%. From 50°C to 1200°C, the structure of fibri-form silica is stable. The average diameter of single fiber range from 20 nm to 50nm and the lengths are 50nm to 3μm. The surface area and pore volume of fibri-form silica are 369.22m2/g and 0.43cc/g, respectively. And the size of pore diameters are different, is one of mesopore materials presenting high quality filler and catalyzer carrier.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference30 articles.
1. R. Kusiorowski, T. Zaremba, J. Piotrowski, A. Gerle, Thermal decomposition of asbestos-containing materials, J thermanal calorim. 7(2013)179-188.
2. F. Wypych, L.B. Adad, N. Mattoso, et al, Synthesis and characterization of disordered layered silica obtained by selective leaching of octahedral sheets from chrysotile and phlogopite structures, J colloid interf sci. 283 (2005)107-112.
3. G.W. Brindley, G. Brown, Crystal Structure of Clay Minerals and their X-Ray Identification, Mineralogical Society, London. (1980).
4. X. Wang, E. Yano, S. Lin, ITS. Yu, Lan Y, Cancer Mortality in Chinese Chrysotile Asbestos Miners: Exposure-Response Relationships, PLoS ONE. 08 (2013) 71899.
5. X.R. Wang, I.T.S. Yu, H. Qiu, et al, Cancer mortality among Chinesechrysotile asbestos textile workersLungCancer. 75 (2012)151-155.