造孔剂羧甲基纤维素对粉煤灰基陶瓷膜支撑体性能的影响及其覆膜研究

doi:10.11896/cldb.20120080

材料导报

2022, Vol. 36

Issue (24): 20120080-6 https://doi.org/10.11896/cldb.20120080

无机非金属及其复合材料

造孔剂羧甲基纤维素对粉煤灰基陶瓷膜支撑体性能的影响及其覆膜研究

同帜^1,*, 李岩¹, 闫笑¹, 董琪², 邹愈², 纪昊江¹

1 西安工程大学环境与化学工程学院,西安 710048
2 陕西科控技术产业研究院有限公司,西安 710048

Effect of Pore Former CMC on Support of Fly Ash-based Ceramic Membrane and Analysis of Coating

TONG Zhi^1,*, LI Yan¹, YAN Xiao¹, DONG Qi², ZOU Yu², JI Haojiang¹

1 School of Environmental and Chemical Engineering, Xi'an Polytechnic University, Xi'an 710048, China
2 Shanxi Science and Technology Industrial Research Institute Co., Ltd., Xi'an 710048, China

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摘要本工作以工业固废粉煤灰为原料、羧甲基纤维素(CMC)为造孔剂制备了无机陶瓷膜支撑体,研究了CMC添加量对支撑体性能的影响;以HNO₃为胶溶剂、甲基纤维素(MC)为分散剂,制备Al₂O₃溶胶,并采用浸渍提拉法对支撑体进行覆膜,分析了膜液稳定性及支撑体覆膜过程稳定性的主要影响因素。结果表明,随CMC由0%增加至7%(质量分数),支撑体孔隙率由32%提高至47%,抗折强度由50.76 MPa降至30.79 MPa,酸碱质量损失率减小,最低分别为0.47%/0.36%。当pH值为2～4,MC添加量为20%,可制得粘度为1.68 MPa·s、稳定且无色透明的Al₂O₃溶胶;当溶胶粘度控制在1.6～2.2 MPa·s,浸渍时间为30 s,涂膜三次可得分布均匀、连续且高致密性的薄膜。

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关键词: 陶瓷支撑体造孔剂粉煤灰凝胶膜

Abstract: In order to effectively reuse industrial waste, a fly ash-based porous ceramic membrane carrier added with carboxymethyl cellulose (CMC) was prepared. The effect of the addition of CMC on the performance of the support was studied. Al₂O₃ sol was prepared added with dispersant HNO₃ and peptizer methyl cellulose (MC), used immersion pulling method and solid particle sintering method for coating. The main influencing factors of the stability of the membrane liquid and the coating process were analyzed. The results showed that as the CMC increased from 0% to 7%, the porosity of the support increased from 32% to 47%, the flexural strength decreased from 50.76 MPa to 30.79 MPa, and the acid-base mass loss rate decreased, with a minimum of 0.47/0.36%. When the pH was 2—4 and the MC addition was 20%, a stable, colorless and transparent Al₂O₃ sol was obtained with a viscosity of 1.68 mPa·s. When the sol viscosity was 1.6—2.2 mPa·s, the immersion time was 30 s, and the film is coated 3 times, a uniform, continuous and high-density film was obtained.

Key words: ceramic support pore forming agent fly ash gel membrane

发布日期: 2023-01-03

ZTFLH:

X703

基金资助: 陕西省科技厅重点研发项目(2018ZDXM-SF-094;2020GY-325;2020SF-410)

通讯作者: 1018915428@qq.com

作者简介: 同帜,西安工程大学环境与化学工程学院教授级高级工程师、硕士研究生导师。1987年毕业于西北纺织工学院,在环境与化学工程学院环工系任教至今。多年来研究废水处理与环保材料的开发,从事环境微生物、污染控制化学、环境化学、水污染控制、环保新材料、水资源环境调查等的教学和科研。现担任国家生态环境部西部督查中心专家,陕西省环保厅、西安市环保局评估中心环保专家,中国纺织业联合会环保专家等,主持和参与了众多科研项目,包括国家自然科学资金、陕西省科技厅、西安市科技局、陕西省教育厅及企业委托等。在国内外学术期刊上发表论文100余篇。

引用本文:

同帜, 李岩, 闫笑, 董琪, 邹愈, 纪昊江. 造孔剂羧甲基纤维素对粉煤灰基陶瓷膜支撑体性能的影响及其覆膜研究[J]. 材料导报, 2022, 36(24): 20120080-6.
TONG Zhi, LI Yan, YAN Xiao, DONG Qi, ZOU Yu, JI Haojiang. Effect of Pore Former CMC on Support of Fly Ash-based Ceramic Membrane and Analysis of Coating. Materials Reports, 2022, 36(24): 20120080-6.

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http://www.mater-rep.com/CN/10.11896/cldb.20120080 或 http://www.mater-rep.com/CN/Y2022/V36/I24/20120080

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