Preparation of Solution Blown Polyamic Acid Nanofibers and Their Imidization into Polyimide Nanofiber Mats

Li, Jing; Song, Guocheng; Yu, Junrong; Wang, Yan; Zhu, Jing; Hu, Zuming

doi:10.3390/nano7110395

Cited by 31 publications

(29 citation statements)

References 35 publications

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“…It can be seen from Figure 3b that the characteristic absorption peak representing the chemical structure of the PI molecule, which is the absorption peak of the imide ring, such as 1770, 1720, and 720 cm − 1 , appears in the spectrum of pure PI fiber. The absorption peak at 1360 cm − 1 corresponds to the C–N stretching in the imide ring [1,38]. After combining the PI and the PVDF by side-by-side electrospinning, the combined characteristic peaks of PI and PVDF can be found in the FTIR of bicomponent fiber membrane (Figure 3c).…”

Section: Resultsmentioning

confidence: 99%

Efficient Synthesis of PVDF/PI Side-by-Side Bicomponent Nanofiber Membrane with Enhanced Mechanical Strength and Good Thermal Stability

Cai

Zhang

et al. 2018

Nanomaterials

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Bicomponent composite fibers, due to their unique versatility, have attracted great attention in many fields, such as filtration, energy, and bioengineering. Herein, we efficiently fabricated polyvinylidene fluoride/polyimide (PVDF/PI) side-by-side bicomponent nanofibers based on electrospinning, which resulted in the synergism between PVDF and PI, and eventually obtained the effect of 1 + 1 > 2. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) were used to characterize the morphology and chemical structure of nanofibers, indicating that a large number of side-by-side nanofibers were successfully prepared. Further, the thermal stability, mechanical strength, and filtration properties of PVDF/PI were carefully investigated. The results revealed that the bicomponent nanofibers possessed both good mechanical strength and remarkable thermal stability. Moreover, the mechanical properties of PVDF/ PI were strengthened by more than twice after the heat treatment (7.28 MPa at 25 °C, 15.49 MPa at 230 °C). Simultaneously, after the heat treatment at 230 °C for 30 min, the filtration efficiency of PVDF/PI membrane was maintained at about 95.45 ± 1.09%, and the pressure drop was relatively low. Therefore, the prepared PVDF/PI side-by-side bicomponent nanofibers have a favorable prospect of application in the field of medium- and high-temperature filtration, which further expands the application range of electrospun fiber membranes.

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Section: Resultsmentioning

confidence: 99%

Efficient Synthesis of PVDF/PI Side-by-Side Bicomponent Nanofiber Membrane with Enhanced Mechanical Strength and Good Thermal Stability

Cai

Zhang

et al. 2018

Nanomaterials

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“…Interactions between polymer and solvent can be associated with fiber formation mechanism. Despite the higher viscosity of the PS/orange oil solutions, nanofibers with smaller diameters were obtained as compared to toluene (Table ) because the lower orange oil evaporation rate overcomes the viscoelastic forces ( G ′ and G ″) allowing fibers to stretch even further across the working distance and thus reducing their diameters …”

Section: Resultsmentioning

confidence: 99%

Polystyrene bioactive nanofibers using orange oil as an ecofriendly solvent

Miranda

Mattoso

Bresolin

et al. 2018

J of Applied Polymer Sci

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Solution blow spun polystyrene (PS) nanofibers were produced from 20 to 30 wt % PS solutions using toluene (industrial solvent) and orange oil (green solvent). The latter being composed of D-limonene (97.06%) as determined by gas chromatography-mass spectroscopy. The rheological behavior and volatility of the solvents and polymer solutions were correlated with fiber morphology, accessed by scanning electron microscopy. Thermal analysis was used to determine the thermal behavior of fibers. The antimicrobial activity of orange oil was tested for potential applications of the spun mats in active food packaging. Results showed that the nanofibers spun from orange oil solutions had average diameters of 306 AE 74 nm as opposed to 441 AE 110 nm for toluene. Moreover, when compared with fiber spun from toluene solutions, orange oil yielded more flexible fibers with slightly lower contact angles and better antimicrobial properties due to the presence of residual oil confirmed by Fourier-transform infrared spectroscopy.

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“…Air flow is generally of the order of 150-200 m/s at 3-5 bar of pressure. The accelerated gas jet stretches the core polymer jet, which after passing through a brief~1 mm straight part, with massive diameter reduction experiences substantial bending instability with stretching, more like flapping in the surrounding air [78][79][80][81]. Meanwhile, the solvent evaporates and the polymer jet solidifies in the form of fiber and gets collected on a solid grid or drum collector.…”

Section: Solution Blowingmentioning

confidence: 99%

A Review on Biopolymer-Based Fibers via Electrospinning and Solution Blowing and Their Applications

Kakoria

Sinha-Ray

2018

Fibers

127

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Electrospinning, for the last few decades, has been extensively acknowledged for its ability to manufacture a macro/nanofibrous architecture from biopolymers, which is otherwise difficult to obtain, in a cost effective and user-friendly technique. Such biopolymer nanofibers can be tailored to meet applications such as drug delivery, tissue engineering, filtration, fuel cell, and food packaging etc. Due to their structural uniqueness, chemical and mechanical stability, functionality, super-high surface area-to-volume ratio, and one-dimensional orientation, electrospun biopolymer nanofibers have been proven to be extremely beneficial. A parallel method in nonwoven methodologies called "Solution Blowing" has also become a potential candidate to fabricate a similar type of architecture from biopolymer fibers, and is gaining popularity among researchers, despite its recent advent in early 2000's. This review chiefly focuses on the fabrication of biopolymer macro/nanofibers via electrospinning and solution blowing, and several applications of such fiber architectures. Biopolymers include plant-and animal-derived biopolymers, such as cellulose, lignin, chitin, and chitosan, as well as proteins and their derivatives. The fabrication of biopolymer fibers from these biopolymers alone or as blends, predominantly with biodegradable polymers like Polyvinyl alcohol (PVA), Polyethylene Oxide (PEO), Polyethylene glycol (PEG), poly (lactide-co-glycolide) (PLGA) etc., or non-biodegradable polymers like polyamide, Polyacrylonitrile (PAN) etc., will be discussed in detail, along with the applications of several composites of such sort.

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Preparation of Solution Blown Polyamic Acid Nanofibers and Their Imidization into Polyimide Nanofiber Mats

Cited by 31 publications

References 35 publications

Efficient Synthesis of PVDF/PI Side-by-Side Bicomponent Nanofiber Membrane with Enhanced Mechanical Strength and Good Thermal Stability

Efficient Synthesis of PVDF/PI Side-by-Side Bicomponent Nanofiber Membrane with Enhanced Mechanical Strength and Good Thermal Stability

Polystyrene bioactive nanofibers using orange oil as an ecofriendly solvent

A Review on Biopolymer-Based Fibers via Electrospinning and Solution Blowing and Their Applications

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