Fabrication of hierarchical porous poly (l-lactide) (PLLA) fibrous membrane by electrospinning

Lu, Zihan; Zhang, Bowen; Gong, Rong; Li, Jiashen

doi:10.1016/j.polymer.2021.123797

Cited by 28 publications

(26 citation statements)

References 54 publications

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“…After the solvent in the solvent-rich phase evaporated, the porous structure of electrospun rPET fibers appeared. Compared with the similar mechanism study on poly(L-lactic acid), 9,19 the NMP-induced recrystallized PET fibers did not have a significant increase in crystallinity. Combining with the SEM images in Figure 4, it could be assumed that crystallization induced by NMP cannot penetrate deep into the fiber interior but only occurs on the fibers' surface.…”

Section: Residual Solvent Of Electrospun Rpet Fibersmentioning

confidence: 62%

“…Therefore, organic solvent system-induced recrystallization of macromolecules is an alternative to modify fiber’s hierarchical porous surface morphology after electrospinning. The recently published systematic research has successfully implemented this theory on PLLA fibers . rPET is a copolymer that can induce recrystallization by solvents .…”

Section: Introductionmentioning

confidence: 99%

“…The recently published systematic research has successfully implemented this theory on PLLA fibers. 19 rPET is a copolymer that can induce recrystallization by solvents. 20 In view of the dissolution characteristics of PET, the careful selection of solvent systems to swell polymers rather than dissolve them is the key to the successful fabrication of porous electrospun PET fibers.…”

Section: Introductionmentioning

confidence: 99%

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Hierarchical Porous Recycled PET Nanofibers for High-Efficiency Aerosols and Virus Capturing

Song

Zhao

Chen

et al. 2021

ACS Appl. Mater. Interfaces

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Plastic crisis, especially for poly(ethylene terephthalate) (PET) bottles, has been one of the greatest challenges for the earth and human beings. Processing recycled PET (rPET) into functional materials has the dual significance of both sustainable development and economy. Providing more possibilities for the engineered application of rPET, porous PET fibers can further enhance the high specific surface area of electrospun membranes. Here, we use a two-step strategy of electrospinning and postprocessing to successfully control the surface morphology of rPET fibers. Through a series of optical and thermal characterizations, the porous morphology formation mechanism and crystallinity induced by solvents of rPET fibers were discussed. Then, this work further investigated both PM2.5 air pollutants and protein filtration performance of rPET fibrous membrane. The high capture capability of rPET membrane demonstrated its potential application as an integrated high-efficiency aerosol filtering solution.

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Section: Residual Solvent Of Electrospun Rpet Fibersmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hierarchical Porous Recycled PET Nanofibers for High-Efficiency Aerosols and Virus Capturing

Song

Zhao

Chen

et al. 2021

ACS Appl. Mater. Interfaces

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“…When the PLA fibers furtherly dry and the ethanol completely evaporates, pores will be formed in the fibers. 39 In contrast, pore structure of the fibers cannot be achieved when ethanol concentration in the mixed solvent is less than 20 wt% owing to its volatility.…”

Section: Resultsmentioning

confidence: 99%

Construction of a ternary system: a strategy for the rapid formation of porous poly(lactic acid) fibers

et al. 2022

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“…Solvents with high volatility can volatilize within a very short electrospinning time and form a porous structure [ 53 ]. Selective removal of solvents by post−treatment can also leave pores on the surface and inside [ 54 , 55 ]. The results show that the pore−forming mechanisms of electrospun porous nanofibers mainly include breath figures (BFs) [ 56 , 57 , 58 ], vapor induced phase separation (VIPS) [ 59 , 60 ], non−solvent induced phase separation (NIPS) [ 61 , 62 ], thermally induced phase separation (TIPS) [ 63 , 64 ], and selective removal (SR) [ 65 , 66 ].…”

Section: Pore−forming Mechanism Of Electrospun Porous Nanofibersmentioning

confidence: 99%

Electrospun Porous Nanofibers: Pore−Forming Mechanisms and Applications for Photocatalytic Degradation of Organic Pollutants in Wastewater

et al. 2022

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Electrospun porous nanofibers have large specific surface areas and abundant active centers, which can effectively improve the properties of nanofibers. In the field of photocatalysis, electrospun porous nanofibers can increase the contact area of loaded photocatalytic particles with light, shorten the electron transfer path, and improve photocatalytic activity. In this paper, the main pore−forming mechanisms of electrospun porous nanofiber are summarized as breath figures, phase separation (vapor−induced phase separation, non−solvent−induced phase separation, and thermally induced phase separation) and post−processing (selective removal). Then, the application of electrospun porous nanofiber loading photocatalytic particles in the degradation of pollutants (such as organic, inorganic, and bacteria) in water is introduced, and its future development prospected. Although porous structures are beneficial in improving the photocatalytic performance of nanofibers, they reduce their mechanical properties. Therefore, strategies for improving the mechanical properties of electrospun porous nanofibers are also briefly discussed.

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Fabrication of hierarchical porous poly (l-lactide) (PLLA) fibrous membrane by electrospinning

Cited by 28 publications

References 54 publications

Hierarchical Porous Recycled PET Nanofibers for High-Efficiency Aerosols and Virus Capturing

Hierarchical Porous Recycled PET Nanofibers for High-Efficiency Aerosols and Virus Capturing

Construction of a ternary system: a strategy for the rapid formation of porous poly(lactic acid) fibers

Electrospun Porous Nanofibers: Pore−Forming Mechanisms and Applications for Photocatalytic Degradation of Organic Pollutants in Wastewater

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