South Korea's KAIST has developed a biodegradable PBAT mask filter membrane
Recently, Il-Doo Kim of the Korea Institute of Science and Technology (KAIST) developed a functional and biodegradable polymer filtration membrane.
1) The polymer filter membrane is composed of polybutylene terephthalate (PBAT) matrix mixed with cetyltrimethylammonium bromide (CTAB) and montmorillonite (MMT) clay, whose surface properties have been passed The cation exchange reaction was modified for good miscibility with PBAT in organic solvents. In particular, the spontaneous evolution of a partial core-shell structure (i.e., the PBAT core surrounded by a CTAB-MMT shell) during electrospinning amplifies the triboelectric effect as well as the antibacterial/antiviral activity, which was not observed in pristine PBAT .
2) Unlike traditional mask filters that rely on electrostatic adsorption mechanisms that degrade over time and/or due to external environmental factors, filters based on PBAT CTA B-MMT nanofiber membrane (NFM) due to CTAB - Triboelectric effect of MMT to continuously retain static charge on the surface. Therefore, the PBAT CTA B-MMT NFM-based filter showed high filtration efficiency (98.3%, PM0.3) even at a low differential pressure of 40 Pa or less during its service life.
In conclusion, this study not only proposes an effective and practical solution to enhance the performance of filter membranes while minimizing their environmental footprint, but also provides insight into the synergistic functionality of organic-inorganic hybrid materials in applications beyond filter membranes. Provides valuable insights.
