1. Effects of ZIF-L Morphology on PI@PDA@PEI/ZIF-L Composite Membrane's Adsorption and Separation Properties for Heavy Metal Ions.
- Author
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Cao, Hui, Jiang, Ziyue, Tang, Jing, and Zhou, Qiong
- Subjects
METAL ions ,HEAVY metals ,COMPOSITE membranes (Chemistry) ,MEMBRANE separation ,ADSORPTION (Chemistry) ,MEMBRANE permeability (Biology) - Abstract
Composite polymolecular separation membranes were prepared by combining multi-branched ZIF-L with high-porosity electrospinning nanofibers PI. Meanwhile, PDA and PEI were introduced into the membrane in order to improve its adhesion. The new membrane is called the "PI@PDA@PEI/ZIF-L-4" composite membrane. Compared with the PI@PDA@PEI/ZIF-8 composite membrane, the new membrane's filtration rates for heavy metal ions such as Cd
2+ , Cr3+ , and Pb2+ were increased by 7.0%, 6.6%, and 9.3%, respectively. Furthermore, the new membrane has a permeability of up to 1140.0 L·m−2 ·h−1 ·bar−1 , and displayed a very stable performance after four repeated uses. The separation mechanism of the PI@PDA@PEI/ZIF-L composite membrane was analyzed further in order to provide a basis to support the production of separation membranes with a high barrier rate and high flux. [ABSTRACT FROM AUTHOR]- Published
- 2023
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