Multi-level structured polylactic acid electrospun fiber membrane based on green solvents for high-performance air filtration

Ge, Jing; Lv, Xujin; Zhou, Jianwei; Lv, Yarong; Sun, Jingyi; Guo, Han; Wang, Ce; Hu, Ping; Spitalsky, Zdenko; Liu, Yong

doi:10.1016/j.seppur.2023.125659

Cited by 25 publications

(2 citation statements)

References 50 publications

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“…Among the various biodegradable polymers, biobased thermoplastic polylactic acid (PLA) stands out as one of the most promising candidates, as evidenced by its wide application in biomedical, packaging, and textile fields, due to the remarkable renewability, biocompatibility, and ease of processing. − PLA can be melt extruded, melt blown, and electrospun into fibrous membranes, and can replace olefin-based filtering materials widely used in facemasks and respirators. − Chemically functionalized PLA-based membrane filters have been studied by many researchers. − Nevertheless, PLA fibers are inherently brittle, lack of flexibility and stretchability, and slow to degrade biologically in the environment, which present significant challenges in meeting the requirements of biodegradable and comfortable performances for sustainable facemasks. , …”

Section: Introductionmentioning

confidence: 99%

Biobased Triesters as Plasticizers for Improved Mechanical and Biodegradable Performance of Polylactic Acid Fibrous Membranes as Facemask Materials

Sun,

Eckstein,

Niu

et al. 2024

ACS Sustainable Chem. Eng.

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The COVID-19 pandemic has incredibly escalated the use of petroleum-based disposable facemasks, posing a significant environmental burden. In response, polylactide acid (PLA), a biobased and biodegradable aliphatic polymer, has been considered a potential alternative. However, applications of PLA in facemask materials are hindered by its inherent brittleness, poor toughness, and slow degradation rate in the environment. Addressing these challenges, this study explored the use of two biobased triesters as green plasticizers to improve PLA fibrous membranes with desired mechanical properties and biodegradability. PLA and the plasticizers were mixed and electrospun into the fibrous membranes. The influence of two plasticizers in varied contents on the filtration efficiency, morphology, thermal behavior, mechanical properties, and degradation rate of the PLA membranes is systematically investigated. The findings reveal that the proper addition of these plasticizers (7% content) not only effectively lowered the glass transition and cold crystallization temperatures of PLA membranes from 65 to 52 °C and from 78 to 70 °C, respectively, without compromising the filtration performance but also significantly enhanced the material’s toughness, as evidenced by the increased tensile strength from 0.44 to 1.08 MPa and the elongation at break from 1.32% to 12.53%. Furthermore, the plasticized PLA membranes exhibited an enzymatic degradation rate of 34.18% at 50 °C after 96 h, a more than 2-fold increase compared to that of pure PLA. These advancements in this work contribute to the development of high-performance and eco-friendly filtration materials, offering a sustainable solution to the environmental challenges posed by conventional facemasks.

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Section: Introductionmentioning

confidence: 99%

Biobased Triesters as Plasticizers for Improved Mechanical and Biodegradable Performance of Polylactic Acid Fibrous Membranes as Facemask Materials

Sun,

Eckstein,

Niu

et al. 2024

ACS Sustainable Chem. Eng.

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“…The membrane is the central component of an air filter. Many researchers Polymers 2024, 16, 889 2 of 14 have developed filtration materials that are highly filtration efficient [8,9], reduce pressure drop [10,11], and enhance functionality [12,13]. Therefore, the design and development of high-quality filtration membranes are critical for the prevention and control of PM2.5.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Poly(Lactic Acid)@TiO2 Electrospun Membrane Decorated with Metal–Organic Frameworks for Efficient Air Filtration and Bacteriostasis

Lin,

Shen,

Qian

et al. 2024

Polymers

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The development of high-performance filtration materials is essential for the effective removal of airborne particles, and metal–organic frameworks (MOFs) anchored to organic polymer matrices are considered to be one of the most promising porous adsorbents for air pollutants. Nowadays, most air filters are generally based on synthetic fiber polymers derived from petroleum residues and have limited functionality, so the use of MOFs in combination with nanofiber air filters has received a lot of attention. Here, a conjugated electrostatic spinning method is demonstrated for the one-step preparation of poly(lactic acid) (PLA) nanofibrous membranes with a bimodal diameter distribution and the anchoring of Zeolitic Imidazolate Framework-8 (ZIF-8) by the introduction of TiO2 and in situ generation to construct favorable multiscale fibers and rough structures. The prepared PLA/TZ maintained a good PM2.5 capture efficiency of 99.97%, a filtration efficiency of 96.43% for PM0.3, and a pressure drop of 96.0 Pa, with the highest quality factor being 0.08449 Pa−1. Additionally, ZIF-8 was uniformly generated on the surface of PLA and TiO2 nanofibers, obtaining a roughened structure and a larger specific surface area. An enhanced filtration retention effect and electrostatic interactions, as well as active free radicals, can be generated for the deep inactivation of bacteria. Compared with the unmodified membrane, PLA/TZ prepared antibacterial characteristics induced by photocatalysis and Zn2+ release, with excellent bactericidal effects against S. aureus and E. coli. Overall, this work may provide a promising approach for the development of efficient biomass-based filtration materials with antimicrobial properties.

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A facile strategy to fabricate stretchable, low hysteresis and adhesive zwitterionic elastomers by concentration-induced polymerization for wound healing

Luo,

Shen,

Jian

et al. 2024

Chemical Engineering Journal

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Multi-level structured polylactic acid electrospun fiber membrane based on green solvents for high-performance air filtration

Cited by 25 publications

References 50 publications

Biobased Triesters as Plasticizers for Improved Mechanical and Biodegradable Performance of Polylactic Acid Fibrous Membranes as Facemask Materials

Biobased Triesters as Plasticizers for Improved Mechanical and Biodegradable Performance of Polylactic Acid Fibrous Membranes as Facemask Materials

Fabrication of Poly(Lactic Acid)@TiO2 Electrospun Membrane Decorated with Metal–Organic Frameworks for Efficient Air Filtration and Bacteriostasis

A facile strategy to fabricate stretchable, low hysteresis and adhesive zwitterionic elastomers by concentration-induced polymerization for wound healing

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