Crystallization of calcium carbonate in hydrogels in presence of meso-tetrakis (4-hydroxylphenyl) porphyrin  

作　　者：张凤菊 杨新国 庄钰 郭坤琨 王明军 魏文峰 

机构地区：[1]College of Materials Science and Engineering,Hunan University [2]State Key Laboratory of Silicon Materials(Zhejiang University)

出　　处：《Journal of Central South University》2012年第7期1802-1807,共6页中南大学学报（英文版）

基　　金：Project supported by the Fundamental Research Funds for the Central Universities of China;Project (50573019) supported by the National Natural Science Foundation of China;Project (SKL2009-5) supported by Open Research Program of State Key Lab of Silicon Material,Zhejiang University,China

摘　　要：Organic matrices play an important role in biomineralization process. In order to explore the effect of both meso-tetrakis (4-hydroxylphenyl) porphyrin (THPP) and hydrogels on calcium carbonate mineralization,and consequently synthesize functional materials based on porphyrin and calcium carbonate with tunable shapes and optical properties,a new kind of biomimetic mineralization system which combined THPP with three biopolymer hydrogels (gelatin,agarose and calcium alginate gels) was designed and investigated. A carbonate diffusion method based on the generation of CO2 by slow decomposition of ammonium hydrogen carbonate was adopted for calcium carbonate crystallization. The results show that both gelatin and alginate hydrogels exhibit the ability of stabilizing vaterite,while agarose only induces the formation of calcite. With participation of THPP in the mineralization environments,calcite is favored in all these hydrogels,while the crystal morphologies are greatly different from each other. These results indicate the perspective of THPP in regulating calcium carbonate crystallization and also provide a new strategy for fabricating advanced functional materials with controlled morphology and tunable optical properties based on calcium carbonate and THPP.Organic matrices play an important role in biomineralization process. In order to explore the effect of both meso-tetrakis （4-hydroxylphenyl） porphyrin （THPP） and hydrogels on calcium carbonate mineralization, and consequently synthesize functional materials based on porphyrin and calcium carbonate with tunable shapes and optical properties, a new kind of biomimetic mineralization system which combined THPP with three biopolymer hydrogels （gelatin, agarose and calcium alginate gels） was designed and investigated. A carbonate diffusion method based on the generation of CO2 by slow decomposition of ammonium hydrogen carbonate was adopted for calcium carbonate crystallization. The results show that both gelatin and alginate hydrogels exhibit the ability of stabilizing vaterite, while agarose only induces the formation of calcite. With participation of THPP in the mineralization environments, calcite is favored in all these hydrogels, while the crystal morphologies are greatly different from each other. These results indicate the perspective of THPP in regulating calcium carbonate crystallization and also provide a new strategy for fabricating advanced functional materials with controlled morphology and tunable optical properties based on calcium carbonate and THPP.

关 键 词：tetra-p-hydroxyphenyl porphyrin HYDROGEL calcium carbonate biomimetic mineralization 

分 类 号：O614.231[理学—无机化学]