Preparation and properties of polyacrylonitrile fibers with guanidine groups

Yang, Chengran; Wang, Biao; Zhang, Yumei; Wang, Huaping

doi:10.1007/s12221-015-4480-1

Cited by 18 publications

(7 citation statements)

References 54 publications

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“…C 1 s spectra for PAN-nfs can be deconvoluted into three components where C-C/C-H at 284.6 eV [48], C ---N at 286.1 eV and C--O at 288.4 eV respectively. From literature, the binding energies for C ---N was reported at 286.4, 285.9, 286.6 eV [49][50][51] and for C--O at 288.6, 288.5, 288.5 eV [52][53][54] where our results are in good agreement with those reported values. In the case of PAN-TiO 2 (Fig.…”

Section: Characterization Of Pan-nfs and Pan-tio2supporting

confidence: 92%

Photocatalytic and antifouling properties of electrospun TiO2 polyacrylonitrile composite nanofibers under visible light

Bode-Aluko

Pereao

Kyaw

et al. 2021

Materials Science and Engineering: B

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Polyacrylonitrile and its TiO 2 composites were electrospun into nanofibers in N, N'-dimethylformamide for photocatalysis and antifouling experiments. The resultants nanofibers were characterized using field emission scanning microscope, Fourier transform infrared spectroscopy, x-ray diffraction, x-ray photoelectron spectroscopy and contact angle analyses. Fourier transform infrared spectroscopy confirmed the formation of polyacrylonitrile-TiO 2 composite nanofibers with their diameter ranging from 10 to 340 nm. The x-ray photoelectron spectroscopy results indicate the formation of O-Ti-C bonds on polyacrylonitrile-TiO 2 matrix. polyacrylonitrile-TiO 2 and polyacrylonitrile nanofiber surfaces showed superhydrophobicity with water contact angle of 155 ± 1 and 154 ± 1, respectively at 120 s. The photocatalytic properties of polyacrylonitrile nanofibers and polyacrylonitrile-TiO 2 nanofibers were investigated under a simulated visible light source of 1000 W/m 2 using methylene blue. About 90% of methylene blue was degraded within 3 h of exposure using polyacrylonitrile-TiO 2 nanofibers while 55% methylene blue degradation was achieved for polyacrylonitrile nanofibers. Photoluminescence experiment conducted on both materials showed that polyacrylonitrile-TiO 2 could produce OH radicals 10-fold compared to polyacrylonitrile nanofibers. Antimicrobial tests were conducted using E. coli and Bacillus sp. The results showed that only polyacrylonitrile-TiO 2 under visible light hindered the growth of these bacteria with a greater effect on the Gram-positive bacterium, Bacillus sp. The photo-degradation and microbial growth inhibition properties of polyacrylonitrile-TiO 2 showed that the material could be used as an antifouling material under visible light.

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Section: Characterization Of Pan-nfs and Pan-tio2supporting

confidence: 92%

Photocatalytic and antifouling properties of electrospun TiO2 polyacrylonitrile composite nanofibers under visible light

Bode-Aluko

Pereao

Kyaw

et al. 2021

Materials Science and Engineering: B

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“…All obtained vibrational and stretching modes confirmed the successful formation of cobalt-imidazole complex in ZIF-67. [42,43] ZIF-67@PAN films exhibited C≡N stretching vibration at 2242 cm −1 , as was observed for PAN. C─H stretching vibration and skeleton vibration peaks of the imidazole ring at 3136 and 1581 cm −1 , respectively, attributed to the ZIF-67 organic ligand were also be noticed.…”

Section: Resultssupporting

confidence: 69%

High Roughness Induced Pearl Necklace‐Like ZIF‐67@PAN Fiber‐Based Triboelectric Nanogenerators for Mechanical Energy Harvesting

Rani,

Ghoreishian,

Ranjith

et al. 2023

Adv Materials Technologies

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Technological developments and innovations in the wearable device field have created huge consumer demand. Hence, designing energy harvesting devices are of utmost importance. Of the various types of energy harvesting devices, triboelectric nanogenerators (TENGs) have come to the fore, as it can efficiently harvest electrical energy from mechanical motions. To date, polymers and metals have dominated the triboelectric series, but there is a need to develop novel composite materials and 2D materials to enhance the performance of TENGs. In this study, electrospun polyacrylonitrile nanofibers are prepared and decorated with zeolitic imidazole framework‐67 (ZIF‐67@PAN) to form pearl‐necklace‐like fibers. ZIF‐67@PAN nanofibers are prepared by immersing PAN nanofibers for different hours (1, 5, 10, and 24 h) in ZIF‐67 solution, they provide more roughness, and efficient surface contact area. The immersion of PAN fibers in ZIF solution for longer times increases overall energy harvesting efficiency. Different amounts of MXene are deposited on PVDF; the inclusion of MXene improves the charge transfer properties of TENGs. PAN@ZIF‐67 is used as a positive tribolayer and PVDF@MXene as a negative tribolayer. The optimized TENG device has 305 V, 10.6 µA, and 10.9 W/m2 power and demonstrated promising energy harvesting characteristics and self‐powered sensing efficiency.

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“…Upon looking at the suggested structure of ZWβCDPs (Scheme ) we would expect four different chemical environments of carbon. The carbons of carboxylate anion, carboxylic acid, and ester (OCO) and carbons bound to nitrogens (CN/CN) are expected to have the highest binding energy. These results are due to directly bounding carbon of cationic GU group to three electron‐withdrawing nitrogen atoms and also bounding amide carbon to the carbon of cationic GU group.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Zwitterionic Poly(β-cyclodextrin-co -guanidinocitrate) Hydrogels for Ciprofloxacin Controlled Release

Heydari

Pardakhti

Sheibani

2017

Macromol. Mater. Eng.

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A facile, safe, and environmentally friendly approach to the preparation of poly(β‐cyclodextrin‐co‐guanidinocitrate) (ZWβCDP) via polymerization of β‐cyclodextrin (β‐CD) in the presence of guanidinocitrate as a novel cross‐linker is reported. Novel zwitterionic guanidinocitrate cross‐linker is synthesized by in situ reaction of melted guanidine and citric acid during polymerization. The structure of achieved hydrogels is characterized by attenuated total reflection‐Fourier‐transform infrared (ATR‐FTIR), X‐ray photoelectron spectroscopy, thermogravimetric analysis, differential thermogravimetric, differential scanning calorimetry (DSC), differential of DSC, and X‐ray diffraction analyses and also by Kjeldahl and colorimetric methods for elemental analyses. The swelling ratio of the anionic β‐CD polymer (ANβCDP) and ZWβCDPs is determined in water and simulated physiological media. Subsequently, the hydrogels/ciprofloxacin (CFX, as a model antibiotic drug) complexes are prepared to improve the thermal stability of CFX and define potential pharmaceutical applications of hydrogels. Solid‐state characterization of hydrogels/CFX complexes is investigated by ATR‐FTIR and DSC. The in vitro release behavior of CFX from hydrogels is investigated at simulated physiological media, which exhibit initial burst and then slow drug release. The CFX release from ZWβCDP is slower than ANβCDP.

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Preparation and properties of polyacrylonitrile fibers with guanidine groups

Cited by 18 publications

References 54 publications

Photocatalytic and antifouling properties of electrospun TiO2 polyacrylonitrile composite nanofibers under visible light

Photocatalytic and antifouling properties of electrospun TiO2 polyacrylonitrile composite nanofibers under visible light

High Roughness Induced Pearl Necklace‐Like ZIF‐67@PAN Fiber‐Based Triboelectric Nanogenerators for Mechanical Energy Harvesting

Preparation and Characterization of Zwitterionic Poly(β-cyclodextrin-co -guanidinocitrate) Hydrogels for Ciprofloxacin Controlled Release

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