聚乙烯醇模板合成链状纳米氢氧化钙机理研究  

Synthesis and formation mechanism of Ca(OH)_2 nano-chain with polyvinyl alcohol template

作　　者：许兢[1] 钱庆荣[1] 肖良建[1] 刘欣萍[1] 陈庆华[1] 

机构地区：[1]福建师范大学化学与材料学院,福建省改性塑料技术开发基地,福建福州350007

出　　处：《化学工程》2008年第11期50-54,共5页Chemical Engineering(China)

基　　金：福建师大扶苗基金资助项目(F024);教育部“新世纪优秀人才支持计划”(NCET-04-0614)

摘　　要：纳米材料的形貌与团聚控制正成为研究的热点。以聚乙烯醇(PVA124)作为模板、采用液相沉淀法在常温下控制合成了特殊的链状纳米氢氧化钙。通过透射电镜、粒度分析和红外光谱表征表明该链状纳米氢氧化钙能以相对稳定的聚焦态存在,且PVA124与所制备的氢氧化钙间存在较强的作用,而并非简单的吸咐;电导率、紫外可见光谱、TG-DSC等表征表明,钙离子与PVA侧链羟基间存在络合作用,并通过示意图模拟以PVA为模板聚集形成纳米链状沉淀的过程。The researches on the shape and aggregation control of nano-materials are emerged recently. The Ca（OH）2 nano-chain was obtained with PVA124 as template by liquid precipitation at room temperature. The results of TEM, particle size distribution curve, and IR spectra indicate that this nanometer Ca（OH） 2 is aggregated into chain stably. And the interaction between PVA124 and obtained Ca （OH）2 is more likely to be chemical coordination than physical adsorption. The mechanism was detected by the measurement of the conductivity, UV spectra, and TG-DSC. Due to the complexation between Ca^2＋ and PVA-OH, the Ca（OH）2 nano-chain can be formed by PVA template. Its formation process was shown in the schematic.

关 键 词：PVA模板 纳米 氢氧化钙 机理 

分 类 号：TB383.1[一般工业技术—材料科学与工程]