厘米级盘形硅藻微粒单层密排研究  

Centimeter Level Monolayer Close-packed of Disk-Shaped Diatomite Particles

作　　者：张文强[1,2] 张锌[2] 

机构地区：[1]中国农业大学工学院,北京100083 [2]波士顿大学工学院,波士顿02215

出　　处：《无机材料学报》2015年第11期1208-1212,共5页Journal of Inorganic Materials

基　　金：国家自然科学基金青年项目(51305446);中央高校基本科研业务费专项基金(2013XJ005)~~

摘　　要：硅藻土较好的保持了天然硅藻的多级微纳孔阵列、大比表面积等特征,将其分选应用于硅藻研究具有低成本、大量、可重复等优势。本研究采用物理沉降结合机械筛选的方式从硅藻土中提取出盘形硅藻壳微粒,尺寸分布在40~80μm之间。借助空气–水界面颗粒漂浮自组装原理,探究疏水处理的硅藻土壳片快速大面积密排工艺可行性。结果显示通过控制硅藻壳微粒在水面的浓度以及微粒自身形态,可以获得厘米级单层密排结构,且实验制得最大硅藻壳微粒漂浮单层密排面积达到23.7 cm2,捞取干燥完整硅藻微粒单层密排面积达到5.0 cm2。Diatomite earth, preferably maintained the morphology and structure of nature diatom, with the characteristic of unique multi-level nanopores and large specific surface area. Diatom is a low-cost at large quantity through repeatable separation from diatomite earth, suitable for industrial application. In this study, the disk-shaped diatom shell particles, size distribution between 40–80 μm, were extracted out by physical settlement method and mechanical screening method. Then, according to the particles self-assembly close-packed principles at air-water interface, the fast close-packed feasibility of hydrophobic diatom shells in a large area was studied. The results showed that by controlling the concentration and forms of diatom shell particles, centimeter level close-packed monolayer can be obtained. The close-packed monolayer area of floating diatom shell particles was over 23.7 cm2, and on drying substrate was about 5.0 cm2.

关 键 词：硅藻土 盘形微粒 自组装 单层密排 

分 类 号：TQ50[化学工程]