硅藻土/竹炭复合材料的制备及孔结构表征  

Preparation and Characterization on Pore Structure of Diatomite & Bamboo Charcoal Composite Material

作　　者：杨慧敏[1] 钟哲科[1] 刘胜辉[1] 翟志忠[1] 邵琼[1] 何莉莉[1] 

机构地区：[1]国家林业局竹子研究开发中心,浙江杭州310012

出　　处：《中国非金属矿工业导刊》2012年第2期37-39,共3页China Non-Metallic Minerals industry

基　　金：浙江省自然科学基金(Y3090695)

摘　　要：本研究以竹炭为主要原料,添加硅藻土,以硅铝复合物为粘结剂,经粘结造粒、表面包覆改性、高温煅烧等工艺,制备了一种新型硅藻土/竹炭复合材料。采用氮吸附法对其孔结构进行表征,结果表明,BET比表面积为142.563m2/g,总孔容为0.156cm3/g,相比竹炭,比表面积有所降低,但总孔容却提高了43.12%,意味着吸附容量增大了;孔隙分布也较合理,微孔率、介孔率和大孔率分别为44.23%、32.05%和23.72%,克服了硅藻土和竹炭孔径分布过窄的缺点。由此表明在竹炭中添加硅藻土制备介孔率高、孔径分布均匀、吸附容量大的吸附材料是一种可行的方法。In this research, bamboo charcoal as the main raw material, adding diatomite and silicon ＆ aluminum complex as the adhesive, after the processing of bond granulation, surface coating modification and high temperature calcinations, etc., a new type of diatomite ＆ bamboo charcoal composite material was prepared. Characteristics of its pore structure of were studied using N2 adsorption method. The results show its BET specific surface area is 142.563m2/g and the total pore volume is 0.156cm3/g, compared with bamboo charcoal, specific surface area decreased, but the total pore volume increased by 43.12%, which means its adsorption capacity has increased. Micropore porosity, mesopore porosity and macropore porosity were 44.23%, 32.05% and 23.72%, so the pore size distribution is more reasonable than diatomite and bamboo charcoal whose distribution scope is too narrow. All indicates that adding diatomite into bamboo charcoal to prepare high mesopore porosity, well-distributed in pore size and big adsorption capacity adsorption material is a feasible method.

关 键 词：竹炭 硅藻土 复合材料 比表面积 孔径分布 

分 类 号：P619.265[天文地球—矿床学] TB332[天文地球—地质学]