Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 644, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.memsci.2021.120172
Keywords
Hypercrosslinked polymer; Organic solvent nanofiltration; PIM-EA-TB; PDMS; Physical aging
Categories
Funding
- National Natural Science Foundation of China [42174091, 41964003]
- JiangxiProvincial Natural Science Foundation [20202BAB201013]
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Hypercrosslinked polymer additives were incorporated into two polymer matrices to form thin-film nanocomposite membranes for organic solvent nanofiltration. The results showed that these additives increased the permeances of alcohol molecules and improved the nanofiltration performance.
Hypercrosslinked polymer (HCP) additives were successfully incorporated into two polymer matrices: glassy polymer with intrinsic microporosity comprising ethanoanthracene and Tro center dot ger's base (PIM-EA-TB) as well as rubbery polydimethylsiloxane (PDMS), forming thin-film nanocomposite (TFN) membranes for organic solvent nanofiltration (OSN) applications. The thermal stability and surface morphology of TFN membranes were characterized by TGA and SEM. OSN results showed that HCP additives increased the alcohol permeances for both kinds of membranes as it provided extra pathways for alcohol molecules to transport through the membranes. Particularly, the PIM-EA-TB membrane gained above 32% improvement on methanol and ethanol permeances after loading of 5 wt% HCP, whilst maintaining a rejection of 92% for Rose Bengal. Moreover, the physical aging of PIM-EA-TB membrane was retarded by HCP additives and the swelling of the PDMS membrane in non-polar solvents was reduced. In small quantities, the HCP nanoparticles proved to be effective additives to improve the OSN performances for both glassy and rubbery polymer membranes.
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