|本期目录/Table of Contents|

[1]李晓晨,张华,金江.气-固分离低密度陶瓷材料的表面修饰[J].南京工业大学学报(自然科学版),2014,36(06):16-22.[doi:10.3969/j.issn.1671-7627.2014.06.004]
 LI Xiaochen,ZHANG Hua,JIN Jiang.Surface modification of low-density ceramic for gas-solid separation[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2014,36(06):16-22.[doi:10.3969/j.issn.1671-7627.2014.06.004]
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气-固分离低密度陶瓷材料的表面修饰()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
36
期数:
2014年06期
页码:
16-22
栏目:
出版日期:
2014-11-21

文章信息/Info

Title:
Surface modification of low-density ceramic for gas-solid separation
文章编号:
1671-7627(2014)06-0016-07
作者:
李晓晨张华金江
南京工业大学 材料科学与工程学院,江苏 南京 210009
Author(s):
LI XiaochenZHANG HuaJIN Jiang
College of Materials Science and Engineering,Nanjing Tech University,Nanjing 210009,China
关键词:
SiO2涂层 表面修饰 溶胶-凝胶 气-固分离 除尘
Keywords:
SiO2 coating surface modification sol-gel gas-solid separation dust removal
分类号:
TQ174
DOI:
10.3969/j.issn.1671-7627.2014.06.004
文献标志码:
A
摘要:
采用溶胶-凝胶法制备SiO2溶胶,对气-固分离低密度陶瓷进行表面修饰,研究修饰前后滤材过滤阻力、过滤效率和循环再生性能。对溶胶陈化时间和可镀膜时间的影响因素进行考察,并采用正交试验优化工艺参数。采用扫描电子显微镜(SEM)表征修饰表面的微观结构。模拟工业环境,研究滤材的循环再生性能。结果表明:酸含量为可镀膜时间最重要的影响因素,可镀膜时间在酸酯摩尔比为0.09左右时达到最大值。采用最佳参数制备的溶胶对低密度陶瓷表面修饰后,滤材过滤效率均大幅提高,其中FNA滤材对粒径≥0.3 μm粉尘的过滤效率达到99.78%。且循环再生性能大幅提升,经200次循环再生使用后,滤材的过滤阻力低于133 Pa。
Abstract:
The surface of low-density ceramic was modified by silica sol using sol-gel process to improve the filtration efficiency and regeneration performance of the filters with a low filtration resistance.The factors influencing the aging time and the coating time of sol were investigated.The optimal preparation conditions of sol for coating were obtained by orthogonal experimental design.The coating morphology was characterized by scanning electron microscopy(SEM).The recycling performances of the samples were studied in the simulating industrial environment.Results demonstrated that the acid content was the most important factor,and the coating time reached the maximum when the mole ratio of HCl and tetraethyl orthosilicate(TEOS)maintained around 0.09.With the optimal conditions,the prepared silica sol could improve the filtration efficiency of low-density ceramic filters, and the filtration efficiency of FNA filters reached 99.78% for the particle diameter of 0.3 μm.The regeneration performance of the low-density ceramic was improved by the surface modification.The filtration resistance of FNA filters was less than 133 Pa after 200 recycling times.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2013-12-22
基金项目:江苏省连云港市科技工业攻关项目(CG1113)
作者简介:李晓晨(1989—),女,江苏连云港人,硕士,主要研究方向为无机气-固分离材料; 张华(联系人),教授,E-mail:huazhang@njtech.edu.cn..
更新日期/Last Update: 2014-11-20