Self-Charging, Breathable, and Antibacterial Poly(lactic acid) Nanofibrous Air Filters by Surface Engineering of Ultrasmall Electroactive Nanohybrids

Liang, Chenyu; Li, Jiaqi; Chen, Yuyang; Ke, Lv; Zhu, Jintuo; Zheng, Lina; Li, Xiao-Peng; Zhang, Shenghui; Li, Heguo; Zhong, Gan-Ji; Xu, Huan

doi:10.1021/acsami.3c13825

Cited by 3 publications

(3 citation statements)

References 66 publications

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“…Breathable membranes, with selective air permeability, emerge as a promising solution for addressing these challenges. These membranes can serve multiple roles, not only in air purification systems to separate and filter out contaminants like PM 2.5 and harmful pathogens [ 21 , 129 , 130 , 131 ], but also in water treatment processes [ 132 , 133 , 134 ]. The ability to selectively allow certain molecules to pass through while blocking others makes them highly effective in improving air quality, safeguarding public health, and ensuring environmental protection.…”

Section: Applications Of Breathable Membranesmentioning

confidence: 99%

Progress in the Preparation and Application of Breathable Membranes

Luo,

Farooq,

Weng

et al. 2024

Polymers

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Breathable membranes with micropores enable the transfer of gas molecules while blocking liquids and solids, and have a wide range of applications in medical, industrial, environmental, and energy fields. Breathability is highly influenced by the nature of a material, pore size, and pore structure. Preparation methods and the incorporation of functional materials are responsible for the variety of physical properties and applications of breathable membranes. In this review, the preparation methods of breathable membranes, including blown film extrusion, cast film extrusion, phase separation, and electrospinning, are discussed. According to the antibacterial, hydrophobic, thermal insulation, conductive, and adsorption properties, the application of breathable membranes in the fields of electronics, medicine, textiles, packaging, energy, and the environment are summarized. Perspectives on the development trends and challenges of breathable membranes are discussed.

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Section: Applications Of Breathable Membranesmentioning

confidence: 99%

Progress in the Preparation and Application of Breathable Membranes

Luo,

Farooq,

Weng

et al. 2024

Polymers

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“…The electrospun fibers have also been shown to enable the fabrication of advanced masks due to their ultrahigh specific surface area, and can be used to functionalize filters through compositional modification and multilevel nanostructure. , However, during use of the mask, the charge attached to the filter is easily reduced by friction and the influence of hot and humid vapors, resulting in a significant reduction in the electrostatic adsorption of ultrafine particles and a gradual loss of the mask’s protective ability. , Many attempts have been made to solve the problem of insufficiently long-lasting protection of air filters, including improving electret materials, incorporating inorganic materials into fibers, , adjusting processes to reduce fiber diameter, and using biomimetic fiber structures, self-powered filters, − and multistage structured fibers. , For conventional technologies, it remains a challenge to keep filters attached to electrostatic charges continuously and maintain a high level of protection for a longer period.…”

Section: Introductionmentioning

confidence: 99%

Fiber-in-Tube Electrifiable Structure for Virus Filtration Self-Generated Static Electricity by Vibration/Sound

Tang,

Wang,

Sun

et al. 2024

ACS Appl. Mater. Interfaces

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Fiber has been considered as an ideal material for virus insulation due to the readily available electrostatic adsorption. However, restricted by the electrostatic attenuation and filtration performance decline, their long-lasting applications are unable to satisfy the requirements of medical protective equipment for major medical and health emergencies such as global epidemics, which results in both a waste of resources and environmental pollution. We overcame these issues by constructing a fiber-in-tube structure, achieving the robust reusability of fibrous membranes. Core fibers within the hollow could form generators with tube walls of shell fibers to provide persistent, renewable static electricity via piezoelectricity and triboelectricity. The PM 0.3 insulation efficiency achieved 98% even after 72 h of humidity and heat aging, through beating and acoustic waves, which is greatly improved compared with that of traditional nonwoven fabric (∼10% insulation). A mask spun with our fiber also has a low breathing resistance (differential pressure <24.4 Pa/cm 2 ). We offer an approach to enrich multifunctional fiber for developing electrifiable filters, which make the fiber-in-tube filtration membrane able to durably maintain a higher level of protective performance to reduce the replacement and provide a new train of thought for the preparation of other high-performance protective products.

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“…Currently, protective fibrous materials function mainly as a physical shield [28]. However, when infected with harmful microbes during and after use, such as viruses, these materials are vulnerable to secondary contamination and transmission [29,30]. As the most often used personal protective equipment, respirators with antibacterial qualities are essential in various situations [31,32].…”

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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Self-Charging, Breathable, and Antibacterial Poly(lactic acid) Nanofibrous Air Filters by Surface Engineering of Ultrasmall Electroactive Nanohybrids

Cited by 3 publications

References 66 publications

Progress in the Preparation and Application of Breathable Membranes

Progress in the Preparation and Application of Breathable Membranes

Fiber-in-Tube Electrifiable Structure for Virus Filtration Self-Generated Static Electricity by Vibration/Sound

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

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