A green sol-gel route for the synthesis of structurally controlled silica particles from rice husk for dental composite filler
A green sol-gel route for the synthesis of structurally controlled silica particles from rice husk for dental composite filler
复制标题
DOI：
10.1016/j.ceramint.2012.11.052
复制
发表时间：
2013-05-01
影响因子：
5.2
通讯作者：
Husein, Adam
中科院分区：
文献类型：
--
作者：
Zulkifli, Noor Sheeraz Che;Ab Rahman, Ismail;Husein, Adam
采用绿色溶胶-凝胶法以稻壳为原料制备了结构可控的非晶二氧化硅颗粒。在最佳条件下，通过向稻壳水玻璃中加入磷酸，合成了比表面积约为364 m2 g-1，粒径为75 ~ 252 nm的无定形球形二氧化硅颗粒。该粉末是中孔的，具有类似于8 nm的孔径。观察到粉末的附聚程度高度依赖于硅酸钠前体浓度、pH和溶剂。采用TEM、SEM、N2吸附/脱附、XRD和FTIR等技术对SiO2粉体进行了表征。开发的路线简单环保，有助于解决污染问题。所生产的二氧化硅适合用作牙科修复复合材料中的填料。(C)2012 Elsevier Ltd和Techna Group S.r.l. All rights reserved.
A green sol-gel route for preparing structurally controlled non-crystalline silica particles from rice husk was developed. At optimal conditions, amorphous spherical silica particles with a surface area of similar to 364 m(2) g(-1) and particle sizes ranging from 75 to 252 nm were synthesised through the addition of phosphoric acid into sodium silicate derived from rice husk. The powder was mesoporous with a pore size of similar to 8 nm. It was observed that the degree of agglomeration of the powder was highly dependent on the sodium silicate precursor concentration, pH and solvent. TEM, SEM, N-2 adsorption/desorption, XRD and FTIR techniques were used to characterise the silica powder. The route developed is simple and environmental friendly and could help solve pollution problems. The silica produced is suitable for use as a filler in dental restoration composites. (C) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.