Study on Preparation and Properties of Ceramic Membrane Support Bodies with Low Cost

无机陶瓷膜具有耐高温、化学稳定性好、机械强度高、孔径可控、污染小和使用寿命长等有机聚合物膜所不具有的优点，在产品分离、提纯，废气、废液处理等领域已日益受到关注。目前，国内外已商品化的多孔陶瓷膜，存在诸多的问题，如成本高、材质种类少、制备困难，严重制约着陶瓷膜的大规模工业应用。本论文从陶瓷分离膜的低成本化出发，研究了低成本多孔陶瓷支撑体的制备和性能表征，制备出若干具有一定实用价值的低成本多孔陶瓷支撑体。文章内容主要包括如下几个方面： 1.管状多孔堇青石陶瓷膜支撑体的制备与性能研究 作为经典陶瓷材料的堇青石(2MgO•2Al2O3•5SiO2)有诸多优点，低的热膨胀系...Inorganic ceramic membranes exhibit more merits than polymer counterparts, such as high temperature resistance, good chemical stability, high structural stability, pore size controllable, low pollution and long endurance time. Inorganic membranes attract increasing attention, because of their brilliant performances in product separation and purification, dealing with exhaust gas and waste water, e...学位：理学硕士院系专业：材料学院材料科学与工程系_高分子化学与物理学号：2072008115056

粗细粉混用法制备堇青石膜支撑体

将粒径分别为1.5和25μm的堇青石粉体按一定比例球磨混匀,添加适当的粘结剂和造孔剂,经捏合、陈腐、挤出成型及烘坯处理后,程序升温至一定温度烧结2h制备膜支撑体。结果表明,细粉含量20%(质量分数)、1400℃烧结所得的支撑体综合性能较好:纯水通量为10.3m3/(m2·h);爆破压力为2.21MPa。其浸渍于5%(质量分数)NaOH中、置于100℃烘箱36h后,爆破压力仍为1.85MPa,表明其还具有良好的耐碱性能,适合碱性条件下的工业应用

Fabrication of mullite-corundum porous ceramic membrane support

通讯作者：何旭敏 作者简介：韩火年(1983-)，男，江西鹰潭人，在读硕士，师承蓝伟光教授，从事陶瓷膜材料研究。[中文摘要]通过沉淀法制备碳酸铝铵超细粉体均匀包裹的氧化铝粉体,煅烧后,继令其与纳米二氧化硅按一定比例球磨混合,预烧,添加适当的粘结剂和造孔剂,再经捏合、陈腐、挤出成型、烘坯、烧结,制备膜支撑体。结果表明,二氧化硅加入量为12%(质量分数)、1550℃烧结所得的膜支撑体综合性能较好:纯水通量为22.2m3/(m2·h);爆破压力为3.40MPa,开孔率为40.21%;经10%(质量分数)H2SO4或5%(质量分数)NaOH于100℃下浸渍36h后,爆破压力仍分别为2.67和2.89MPa,表明它还具有良好的耐酸碱性能。[英文摘要]Prepared by precipitation method with aluminium nitrate and ammonium acid carbonate,after calcining,superfine powder coated alumina was ball-mill mixed with nano-silica in a certain proportion,then pre-sintered,an appropriate amount binder and pore-forming agent were added.After kneading,aging、extrusion molding and drying,the membrane supports were temperature-programming sintered to certain temperature and held for 2h.It is shown that support body with 12wt% SiO2 and sintered at 1550℃ has much better comprehensive functions:water flux is 22.21 m3／(m2·h），the bursting strength is 3.40MPa,and open porosity is 40.21%．After dipping in 10wｔ% H2SO4 or 5 wt％ NaOH for 36 hat 100℃ respectively,the membrane support still has ａ bursting high up to 2.67 MPa and 2.89 MPa,it indicates that the acid resistance and alkaline resistance property of the membrane support is excellent