Fabrication and humidity sensing property of UV/ozone treated PANI/PMMA electrospun fibers

Vu, Duy Linh; Li, Yiying; Lin, Ting‐Han; Wu, Ming‐Chung

doi:10.1016/j.jtice.2019.03.006

Cited by 16 publications

(12 citation statements)

References 36 publications

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“…The absorbance band at 2930 cm −1 is that of an aromatic C-H stretch, whereas the peak at 3280 cm −1 corresponds to the N-H stretching mode of an aromatic amine. Most of the distinctive peaks at 825, 1026, 1197, 1332, 1508, and 1610 cm −1 exhibited and confirmed the successful synthesis of PANI nanofibers [34][35][36]. Furthermore, both the morphological and chemical formation of PANI were fairly matched and occurred after 2 h of reaction.…”

Section: Subsection Effect Of Reaction Time On Pani Morphologysupporting

confidence: 60%

3D Hierarchical Polyaniline–Metal Hybrid Nanopillars: Morphological Control and Its Antibacterial Application

et al. 2021

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Effective and reliable antibacterial surfaces are in high demand in modern society. Although recent works have shown excellent antibacterial performance by combining unique hierarchical nanotopological structures with functional polymer coating, determining the antibacterial performance arising from morphological changes is necessary. In this work, three-dimensional (3D) hierarchical polyaniline–gold (PANI/Au) hybrid nanopillars were successfully fabricated via chemical polymerization (i.e., dilute method). The morphology and structures of the PANI/Au nanopillars were controlled by the reaction time (10 min to 60 h) and the molar concentrations of the monomer (0.01, 0.1, and 1 M aniline), oxidant (0.002, 0.0067, 0.01, and 0.02 M ammonium persulfate), and acid (0.01, 0.1, 1, and 2 M perchloric acid). These complex combinations allow controlling the hierarchical micro- to nanostructure of PANI on a nanopillar array (NPA). Furthermore, the surface of the 3D PANI/Au hierarchical nanostructure can be chemically treated while maintaining the structure using initiated chemical vapor deposition. Moreover, the excellent antibacterial performance of the 3D PANI/Au hierarchical nanostructure (HNS) exceeds 99% after functional polymer coating. The excellent antibacterial performance of the obtained 3D PANI/Au HNS is mainly because of the complex topological and physicochemical surface modification. Thus, these 3D PANI/Au hierarchical nanostructures are promising high-performance antibacterial materials.

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Section: Subsection Effect Of Reaction Time On Pani Morphologysupporting

confidence: 60%

3D Hierarchical Polyaniline–Metal Hybrid Nanopillars: Morphological Control and Its Antibacterial Application

et al. 2021

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“…The related average diameter of the fibers is about 500 nm. The rough surface of the blending fibers was observed owing to the manufacturing process of the electrospinning system [30]. However, with the UV/ozone treatment, the surface of the fibers become smooth (Figure 3b-e).…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, the response of the sensing process is defined by the extinction change, which converted from the transmission signal. The extinction at 620 nm is calculated by Equation (1) [30]:…”

Section: Voc Detectionmentioning

confidence: 99%

“…In addition, the electrospinning technique can easily control the morphology of free-standing films, such as fiber diameter, shape, and thickness of the film. Poly(methyl methacrylate) (PMMA) is used as the matrix of the sensing material because of its transparent and good mechanical properties [27][28][29][30]. Therefore, we designed PANI/P3TI/PMMA fibers to improve the detection of VOCs.…”

Section: Introductionmentioning

confidence: 99%

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Highly-Sensitive Detection of Volatile Organic Compound Vapors by Electrospun PANI/P3TI/PMMA Fibers

Lin

et al. 2020

Polymers

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Detection of volatile organic compounds (VOCs) is one of the essential concerns for human health protection and environmental monitoring. In this study, the blending fibers using a donor-acceptor copolymer were fabricated by electrospinning technique and subsequent UV/ozone treatment. The donor-acceptor polymers were polyaniline, P3TI, and poly(methyl methacrylate) (PANI/P3TI/PMMA) fibers with a cylindrical structure and uniform morphology. VOCs were directly adsorbed by the copolymer materials assembled onto a glass surface or metal framework scaffold. Under optimal conditions, the PANI/P3TI/PMMA fibers exhibit rapid response and high selectivity to VOC vapors within 30 min of UV/ozone treatment. Additionally, the optical transmittance changes of the freestanding fibers show significant improvement of more than 10 times to those fibers on glass substrates. It is speculated that the presence of P3TI leads to the formation of a heterojunction and increases the electron reception behavior. The modification of the electronic structure as exposed to VOC vapors tend to significantly alter the optical absorbance of the fibers, leading to the excellent sensing at low VOC concentration.

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“…Hence, the sensitivity enhancement of these sensing materials towards humidity is challenging [ 6 ]. Very recently, doping of nanomaterials such as metal oxides (i.e., TiO 2 , ZnO, SnO 2 , Al 2 O 3 , CuO) [ 7 , 8 ], carbon-based materials (i.e., carbon nanotubes (CNTs) and graphene) [ 9 ] and hydrophilic polymers (i.e., polyethyleneimine (PEI) [ 10 ], polyethylene oxide (PEO) [ 11 ], polyvinyl alcohol (PVA) [ 12 ] and polyaniline (PANI) [ 13 ]) have been utilized as composite sensors to obtain an improved sensitivity and response time.…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Humidity Sensors Based on Polyethylene Oxide/CuO/Multi Walled Carbon Nanotubes Composite Nanofibers

et al. 2021

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Polymer composites are favorite materials for sensing applications due to their low cost and easy fabrication. In the current study, composite nanofibers consisting of polyethylene oxide (PEO), oxidized multi-walled carbon nanotubes (MWCNT) and copper oxide (CuO) nanoparticles with 1% and 3% of fillers (i.e., PEO–CuO–MWCNT: 1%, and PEO–CuO–MWCNT: 3%) were successfully developed through electrospinning for humidity sensing applications. The composite nanofibers were characterized by FTIR, XRD, SEM and EDX analysis. Firstly, they were loaded on an interdigitated electrode (IDE), and then the humidity sensing efficiency was investigated through a digital LCR meter (E4980) at different frequencies (100 Hz–1MHz), as well as the percentage of relative humidity (RH). The results indicated that the composite nanofibers containing 1% and 3% MWCNT, combined with CuO in PEO polymer matrix, showed potent resistive and capacitive response along with high sensitivity to humidity at room temperature in an RH range of 30–90%. More specifically, the PEO–CuO–MWCNT: 1% nanocomposite displayed a resistive rapid response time within 3 s and a long recovery time of 22 s, while the PEO–CuO–MWCNT: 3% one exhibited 20 s and 11 s between the same RH range, respectively.

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Fabrication and humidity sensing property of UV/ozone treated PANI/PMMA electrospun fibers

Cited by 16 publications

References 36 publications

3D Hierarchical Polyaniline–Metal Hybrid Nanopillars: Morphological Control and Its Antibacterial Application

3D Hierarchical Polyaniline–Metal Hybrid Nanopillars: Morphological Control and Its Antibacterial Application

Highly-Sensitive Detection of Volatile Organic Compound Vapors by Electrospun PANI/P3TI/PMMA Fibers

Highly Sensitive Humidity Sensors Based on Polyethylene Oxide/CuO/Multi Walled Carbon Nanotubes Composite Nanofibers

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