Electrical Conductivity Improvement of Polyvinyl Alcohol Nanofiber by Solvent Vapour Treatment

Chotimah,; Rianjanu, Aditya; Winardianto, Bimo; Munir, Misbachul; Kartini, Indriana; Triyana, Kuwat

doi:10.18517/ijaseit.6.5.1055

Cited by 16 publications

(10 citation statements)

References 27 publications

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“…The mechanical properties of cross-linked nanofiber mats after treatment can be correlated with the SEM image shown in Fig. 3 , where the gradual increase in modulus and tensile property of the mats is associated with solvent-induced fusion at nanofiber junction points [ 29 , 32 ]; the condensation of vapor during post-treatment resulted in fusion between inter–fiber contacts in the mats. With an increase in exposure time, the amount of vapor that can induce nanofiber junctions is also increased, and when a greater number of nanofiber junctions are induced by the solvent vapor their mechanical properties increase.…”

Section: Resultsmentioning

confidence: 74%

“…Another effect of solvent vapor treatment is to improve the electrical conductivity of the thin-film; this process is known as polar solvent vapor annealing (PVSA) treatment [32] . The most commonly used solvents in PVSA treatment include dimethyl sulfoxide (DMSO), ethylene glycol (EG), N-methyl-2-pyrrolidone (NMP), N,N-dimethyl formamide (DMF), and methanol [ 33 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

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Solvent vapor treatment improves mechanical strength of electrospun polyvinyl alcohol nanofibers

Rianjanu

Kusumaatmaja

Suyono

et al. 2018

Heliyon

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Electrospun nanofibers of polyvinyl alcohol (PVA) have poor mechanical strength. As such their use has often been avoided, particularly in applications that require high mechanical properties. The objective of this study is to increase the mechanical properties of PVA nanofiber mats via physical crosslinking with solvent vapor treatment using organic solvents, dimethyl sulfoxide (DMSO), N, N-dimethyl formamide (DMF), and methanol. The effect of solvent vapor treatment on PVA nanofibers is clearly observed by scanning electron microscope (SEM). The tensile strength increased by over 60%, 90%, and 115% after solvent vapor treatment with DMF at a temperature of 40 °C for 2 h, 4 h, and 8 h, respectively, compared to untreated PVA nanofibers. In addition, Young's modulus of PVA nanofiber mats also increased after DMF treatment. As a comparison, DMSO and methanol were also used in solvent vapor treatment because of differences in their polymer-solvent affinity. Results showed that the highest improvement (100%) in mechanical strength was obtained using DMF. This study shows that solvent vapor treatment offers a simple and inexpensive method that provides excellent results and is a promising alternative treatment for use in increasing the mechanical properties of electrospun nanofibers.

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Section: Resultsmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Solvent vapor treatment improves mechanical strength of electrospun polyvinyl alcohol nanofibers

Rianjanu

Kusumaatmaja

Suyono

et al. 2018

Heliyon

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“…Several methods have been developed to coat the QCM substrate with polymer thin film, including drop casting [14], electrospinning [15,16], and self-assembled monolayer (SAM) methods [17]. A vapor-sensing system fabricated via the SAM method is physically more robust than those fabricated by other methods.…”

Section: Introductionmentioning

confidence: 99%

Chitosan-Based Quartz Crystal Microbalance for Alcohol Sensing

et al. 2018

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Short-chain alcohols are a group of volatile organic compounds (VOCs) that are often found in workplaces and laboratories, as well as medical, pharmaceutical, and food industries. Real-time monitoring of alcohol vapors is essential because exposure to alcohol vapors with concentrations of 0.15–0.30 mg·L−1 may be harmful to human health. This study aims to improve the detection capabilities of quartz crystal microbalance (QCM)-based sensors for the analysis of alcohol vapors. The active layer of chitosan was immobilized onto the QCM substrate through a self-assembled monolayer of L-cysteine using glutaraldehyde as a cross-linking agent. Before alcohol analysis, the QCM sensing chip was exposed to humidity because water vapor significantly interferes with QCM gas sensing. The prepared QCM sensor chip was tested for the detection of four different alcohols: n-propanol, ethanol, isoamyl alcohol, and n-amyl alcohol. For comparison, a non-alcohol of acetone was also tested. The prepared QCM sensing chip is selective to alcohols because of hydrogen bond formation between the hydroxyl groups of chitosan and the analyte. The highest response was achieved when the QCM sensing chip was exposed to n-amyl alcohol vapor, with a sensitivity of about 4.4 Hz·mg−1·L. Generally, the sensitivity of the QCM sensing chip is dependent on the molecular weight of alcohol. Moreover, the developed QCM sensing chips are stable after 10 days of repeated measurements, with a rapid response time of only 26 s. The QCM sensing chip provides an alternative method to established analytical methods such as gas chromatography for the detection of short-chain alcohol vapors.

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“…When these parameters are maintained, the electrospinning method will produce a controllable nanofiber with high reproducibility. A nanofiber structure possesses a high surface area, which is beneficial to its utilization as a humidity sensor (Ding et al, 2009). Thus, the use of PEDOT-PSS mixed with polyvinyl alcohol (PEDOT-PSS/PVA)-nanofiber-coated QCM chips to develop a humidity sensor has considerable potential.…”

Section: Introductionmentioning

confidence: 99%

Quartz crystal microbalance coated with PEDOT–PSS/PVA nanofiber for a high-performance humidity sensor

Julian

Rianjanu

Hidayat

et al. 2019

J. Sens. Sens. Syst.

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Abstract. Quartz crystal microbalance (QCM) coated with poly(3,4-ethylenedioxythiophene) and polystyrene sulfonate mixed with polyvinyl alcohol (PEDOT–PSS/PVA) nanofiber has been fabricated as a humidity sensor using the electrospinning method. Three types of PEDOT–PSS/PVA nanofiber sensors are fabricated with different needle-to-collector electrospinning distances. The scanning electron microscope images confirm the presence of beads in the nanofiber structure. The results show that the sensor mass deposition increased with the decrease in needle-to-collector distance. The best sensor performance is exhibited by the sample with medium needle-to-collector distance (QCM NF 2). The QCM NF 2 nanofiber sensor shows excellent sensitivity of up to 33.56 Hz per percentage point of relative humidity, with rapid response (5.6 s) and recovery (3.5 s) times, good linearity, excellent repeatability, low hysteresis, and long-term stability and response. The QCM PEDOT–PSS/PVA nanofiber sensor provides a simple method to fabricate high-performance humidity sensors.

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Electrical Conductivity Improvement of Polyvinyl Alcohol Nanofiber by Solvent Vapour Treatment

Cited by 16 publications

References 27 publications

Solvent vapor treatment improves mechanical strength of electrospun polyvinyl alcohol nanofibers

Solvent vapor treatment improves mechanical strength of electrospun polyvinyl alcohol nanofibers

Chitosan-Based Quartz Crystal Microbalance for Alcohol Sensing

Quartz crystal microbalance coated with PEDOT–PSS/PVA nanofiber for a high-performance humidity sensor

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