Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 587, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.memsci.2019.117172
Keywords
Electrostatic deposition; Phenolic membranes; Gradient nanopores; Ultrahigh permeance; Dye rejection
Categories
Funding
- National Basic Research Program of China [2015CB655301]
- National Natural Science Foundation of China [21825803]
- Jiangsu Natural Science Foundations [BK20150063]
- Program of Excellent Innovation Teams of Jiangsu Higher Education Institutions
- Project of Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
Ask authors/readers for more resources
Ultrafiltration membranes with relatively small pores are highly expected in various separation cases. As a flexible manner to efficiently tighten the pores, post modification provides a robust platform for preparing the desired membranes. However, the endeavor to pursue high permselectivity of the membranes has been made by paying close attention to the modification layers while the effects of the substrate membranes are generally overlooked. In this work, tight membranes with ultrahigh permeance were produced by coating polyethylenimine (PEI) on gradient nanoporous phenolic substrates. Cationic PEI was tightly deposited on the negatively charged phenolics via electrostatic deposition, thus reducing the effective pore sizes to similar to 2.6 nm through a single-step coating. The gradient porous nanostructures still remained after PEI coating in the phenolic membranes. The coated membranes exhibited similar to 4-45 times higher permeance than counterparts with similar rejections. As the cationic PEI was distributed on the membrane surface and pore wall after coating, the positively charged membranes thus produced were able to efficiently separate cationic dyes from water.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available