Microwave‐assisted rapid fabrication of antibacterial polyacrylonitrile microfibers/nanofibers via nitrile click chemistry and electrospinning

Wang, Wenxiang; Wang, Yuxue; Liu, Ye; Jiang, Linlin; Bai, Liangjiu; Chen, Hou; Cheng, Zhenping

doi:10.1002/app.45490

Cited by 9 publications

(4 citation statements)

References 36 publications

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“…There is a good concordance between the results of the study of the UV-Vis spectra and the X-ray diffraction patterns. These results are in good agreement with the results of many references 29,[78][79][80][81] .…”

Section: Physical Characterizationssupporting

confidence: 92%

“…29 The reason behind all the changes in the absorption peaks related to the polymeric matrix was due to the complex formation between the functional groups in the polymeric matrix and the metalized agent. 79 It was evident from Figure S1(c) that, as the amount of MA NPs, there was a progressive increasing in the intensity of the SPR band. There were no additional bands around the visible region, indicating the obstruction of the agglomerated shapes of the metallic agent particles by diffusion on the outer surface and in the inner surface of the polymeric matrix, and the absence of silver oxide formation of these particles This, in turn, increased the characteristic absorption band width of the MA NPs.…”

Section: Resultsmentioning

confidence: 88%

“…Interface/interphase interactions occur between the polymeric component and the inorganic component via van-der Waals and strengthen of the hydrogen bonding between adjacent polymer molecules. 56,95 Many surveys represented by Li, 96 Tham 8 Cao 95 and Wang, 79 physico-chemical crosslinking affects the prominent change in the intensities and shapes of the IR-bands, and the stability of final fibril structure. In the 0AgPAN sample, the functional groups in the naphtyridine ring, 87,91 as the main modified structure of the polymeric matrix after the cyclization reaction, tend to create a suitable environment for the formation of physical cross-links 8,96 between the chains of the polymeric matrix, resulting in a rather weak cross-linked fibrous structure of the 0AgPAN sample.…”

Section: Resultsmentioning

confidence: 99%

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A comparative investigation of the synergistic correlation (mechanical-hydrophobicity/hydrophilicity vs. structural behaviors) of a series of surface-metalized polyacrylonitrile fibers by silver nanoparticles (AgPAN): An in-situ surface metallization protocol

Kara

Esmaeili

Kehtari

et al. 2022

Journal of Industrial Textiles

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Research problem The demand for polymeric materials is increasing day by day, provided that they have excellent virtues to meet desired needs. The best way to obtain high-quality polymeric materials was surface treatment in multiple methods. All the methods that have been used were expensive, multi-stage, harmful to the environment, and other shortages. Therefore, we sought in our paper to invent and develop a surface metallization protocol under green and safe conditions, based on integrating two safe methods for preparing nanomaterials (electrospinning/ultrasound) in one-pot. Aim of this work The main objective of this work is to answer a question that has been neglected in other papers: how does in-situ metallization affect the crystalline behavior of the semi-crystalline phase of the PAN matrix depending on different amounts of MA NPs and their synergy for the rest of the properties (morphological and structural) is presented, in first degree. In the second degree, an explanation of the synergy mechanism between the mechanical/hydrophilic properties and the modified structural properties of metalized fibers has explained. Results Here, an unaccustomed and green methodology to metalize the polyacrylonitrile, PAN, surface is reported with the intention of fashioning of a stable fibrous structure and the best specifications. The in-situ metallization process is essentially based on a loading of various amount of silver nanoparticles, as MA NPs “MA NPs”, (1 wt%, 4 wt%, 7 wt% and 10 wt%), which prepared by ultrasound irradiation assisted with a little amount of a reducer system (hydrazine/NaOH), on the PAN surface. The physiochemical characterization of as-synthesized fibrous samples was consisted of two parts: (i) characterization of sample nature (utilizing of XRD and UV-Vis. techniques), (ii) the chemical structure/morphological characterization (utilizing FESEM, TEM and AFM techniques) with performing all relevant measurements. From crystalline and UV-Vis. assessments, the observed shift in the diffraction peaks towards lower angles and slight shifts in the absorption bands of PAN (1 0 0) in the 1AgPAN and 4AgPAN samples, containing smaller-sized nanoparticles, are overt results of an improvement in the crystalline traits of the parent matrix. The FT-IR data revealed the intensification and overlapping of the IR-bands “C= N, C≡ N, N-H, C=O and O-H” without band shifting for fibrous samples with low content of MA NPs (1AgPAN and 4AgPAN samples). The intercalation of the MA NPs between the chains of the molecular matrix and the strong interconnection/hydrogen bonds between both components explain not only the change of the crystalline properties of the crystalline matrix but also the homogeneous distribution and creation of a stable layer of the MA NPs on the 0AgPAN surface, confirmed by the FESEM and TEM images. The results of the study of mechanical properties showed that the loading of small spherical particles onto the polymeric matric, in particular 1AgPAN and 4AgPAN samples, was positively reflected on the improvement of the mechanical performances and the related values, not in the 7AgPAN and 10AgPAN samples. Because the MA NPs have a hydrophobic character, loading them onto the bare polymeric fiber surface made the metalized fibers a stronger hydrophobic than that of hydrophilic character, which is consistent with differences in surface roughness (increasing Ra values). The main focus of this paper was to study the synergy of structural properties with each other. So, the results of the synergistic relationship study showed that the low amount of the MA NPs led to a comprehensive and positive correlation between all structural properties and in turn affected the mechanical properties-hydrophobic/hydrophilic properties. Noting that the fibers of the 1AgPAN and 4AgPAN samples had the best structural stability, compared to the fibers of the 0AgPAN, 7AgPAN and 10AgPAN samples, when they were: decreasing in Z value, increasing fiber diameter/particle size “P.S.”, increasing RCR and C.D. values and decreasing D.D, alteration in values obtained of the mechanical behavior and the increasing of contact angle “CA” values for water “H2O” droplets and decreasing for ethylene glycol “EG”. As a final result, the changes observed in the aforementioned measurements were reasonably regular and gradual for fibers with low MA NPs content, while the same measurements were significantly deteriorated in the case of fibers with higher MA NPs contents.

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Section: Physical Characterizationssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

A comparative investigation of the synergistic correlation (mechanical-hydrophobicity/hydrophilicity vs. structural behaviors) of a series of surface-metalized polyacrylonitrile fibers by silver nanoparticles (AgPAN): An in-situ surface metallization protocol

Kara

Esmaeili

Kehtari

et al. 2022

Journal of Industrial Textiles

View full text Add to dashboard Cite

show abstract

“…The click reaction with sodium azide and zinc chloride was utilized to modify acrylonitrile polymers (Tsarevsky, Bernaerts, Dufour, Du Prez, & Matyjaszewski, 2004). Therefore, polyacrylonitrile (PAN) is completely suitable for nitrile-click chemistry (W. Wang et al, 2017).…”

Section: Other Click Reactionsmentioning

confidence: 99%