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胶溶过程和热处理对介孔α-氧化铝膜溶胶-凝胶制备的影响。

Effect of the Peptization Process and Thermal Treatment on the Sol-Gel Preparation of Mesoporous α-Alumina Membranes.

作者信息

Naseer Danyal, Ha Jang-Hoon, Lee Jongman, Park Chanhyuk, Song In-Hyuck

机构信息

Ceramic Materials Division, Korea Institute of Materials Science (KIMS), 797 Changwon-daero, Changwon-si 51508, Korea.

Department of Advanced Materials Engineering, University of Science and Technology (UST), 217 Gajeong-ro, Daejeon 34113, Korea.

出版信息

Membranes (Basel). 2022 Mar 10;12(3):313. doi: 10.3390/membranes12030313.

DOI:10.3390/membranes12030313
PMID:35323788
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8955257/
Abstract

Compared to traditional membrane materials, alumina membranes are particularly beneficial for industrial wastewater treatment. However, the development of mesoporous α-alumina membranes for ultrafiltration applications is still a challenge due to uncontrolled pore size. In this study, we optimized the sol-gel method for the fabrication of a high-performance mesoporous α-alumina membrane. The peptization conditions (pH and peptization time) and phase transformation of boehmite were investigated to achieve better properties of the α-alumina membrane. The surface properties of the membrane were observed to be improved by reducing the system pH to 3.5 and increasing the peptization time to 24 h. The effect of sintering temperature on the phase transformation behavior, microstructures and performance of the membranes was also elucidated. An α-alumina ultrafiltration membrane with an average thickness of 2 μm was obtained after sintering at 1100 °C. The molecular weight cut-off of the α-alumina membrane, as obtained by the filtration of aqueous PEG solution, was approximately 163 kDa (12.5 nm). This is the smallest pore size ever reported for pure α-alumina membranes.

摘要

与传统膜材料相比，氧化铝膜对工业废水处理特别有益。然而，由于孔径难以控制，用于超滤应用的中孔α-氧化铝膜的开发仍然是一个挑战。在本研究中，我们优化了溶胶-凝胶法以制备高性能中孔α-氧化铝膜。研究了胶溶条件（pH值和胶溶时间）以及勃姆石的相变，以获得性能更好的α-氧化铝膜。通过将系统pH值降低到3.5并将胶溶时间增加到24小时，观察到膜的表面性能得到改善。还阐明了烧结温度对膜的相变行为、微观结构和性能的影响。在1100℃烧结后获得了平均厚度为2μm的α-氧化铝超滤膜。通过过滤聚乙二醇水溶液得到的α-氧化铝膜的截留分子量约为163 kDa（12.5 nm）。这是纯α-氧化铝膜迄今报道的最小孔径。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/33200642a0a1/membranes-12-00313-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/5ee84f9ee740/membranes-12-00313-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/00caacede35e/membranes-12-00313-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/c8b91ea4c5aa/membranes-12-00313-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/47bd3ce9bae2/membranes-12-00313-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/a7dd83065379/membranes-12-00313-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/6eaf674af2e7/membranes-12-00313-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/5037330d4736/membranes-12-00313-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/3e22eed62de0/membranes-12-00313-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/ebf21708a569/membranes-12-00313-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/4b72aed26285/membranes-12-00313-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/2ef6fc269d67/membranes-12-00313-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/33200642a0a1/membranes-12-00313-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/5ee84f9ee740/membranes-12-00313-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/00caacede35e/membranes-12-00313-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/c8b91ea4c5aa/membranes-12-00313-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/47bd3ce9bae2/membranes-12-00313-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/a7dd83065379/membranes-12-00313-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/6eaf674af2e7/membranes-12-00313-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/5037330d4736/membranes-12-00313-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/3e22eed62de0/membranes-12-00313-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/ebf21708a569/membranes-12-00313-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/4b72aed26285/membranes-12-00313-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/2ef6fc269d67/membranes-12-00313-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7906/8955257/33200642a0a1/membranes-12-00313-g012.jpg

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