摘  要：膜材料是膜分离技术的核心，膜材料的开发是膜开发的基础。陶瓷膜凭借其良好的机械性能、热稳定性、化学稳定性以及易清洗性能在膜材料开发领域中备受关注。然而，高昂的制作成本一直是制约其发展的因素。因此本文采用“浸浆法”在管状多孔氧化铝支撑上制备了以天然凹土纳米纤维为分离层的多通道凹土陶瓷微滤膜，考察了涂膜时间对其孔径、膜厚、表面形貌、渗透性能以及在纤维素酶发酵液中分离性能的影响，结果表明，随着涂膜时间的增加，膜孔径越小，膜层厚度越厚，纤维层堆积越紧密，纯水通量越小，在纤维素酶发酵液微滤实验中的通量越大。多通道凹土陶瓷微滤膜的制备有效的降低了陶瓷膜的制作成本，为陶瓷膜种类的增加和应用的扩大提供了新的思路。72509

毕业论文关键词：膜材料，凹土纳米纤维，多通道凹土微滤膜，浸浆法 

Abstract: Membrane materials are the core of the membrane separation technology, the development of membrane materials is the basic for the development of membrane。 Ceramic membranes have receives increasing attention in the development of membrane materials due to remarkable advantages such as high mechanical strength, temperature resistance, chemical stability, easy cleaning performance etc。 However, high preparation cost is major constraint on the development of ceramic membranes, so a new multi-channels ceramic microfiltration membrane with a separation layer made of attapulgite nanofibers was fabricated by dip-coating method in this paper。 The effects of dip-coating time on membrane pore size, thickness, surface morphology, permeability and separating performance in cellulase fermentation broth clarification were investigated。 The results showed that the longer dipping time would increase the membrane thickness and the fiber layer accumulation density, thereby decreasing the pure water flux and increasing the flux in microfiltration cellulase fermentation broth。 The preparation of multi-channels attapulgite ceramic microfiltration membranes reduced the cost ceramic membranes, provided new ideas for expanding ceramic membrane varieties and applications。

Keyword: Membrane material, Attapulgite nano fiber, multichannel ceramic microfiltration membrane, Dip-coating method

目录

1 前言 4

1。1 凹凸棒石黏土结构 4

1。1。1 凹土的性能及应用 5

1。1。2 凹土纳米纤维提纯 5

1。2 膜分离技术 6

1。2。1 膜分离技术简介 6

1。2。2 膜分离法的优点 6

1。3 膜材料及膜材料的发展 6

1。3。1有机纤维膜及膜材料 6

1。3。2 有机-无机复合纳米纤维膜 7

1。3。3 无机纳米纤维膜及膜材料 7

1。3。4 新型分离膜及制备方法 9

1。3。5 无机陶瓷膜及其制备技术 9

1。4 陶瓷膜的共烧结制备技术 9

1。5 本文研究目的及主要内容 9

2 实验材料及方法 10

2。1 实验原料 10

2。2 仪器及设备 10

2。3 实验方法 11

2。3。1 涂膜液的制备