Nafion film temperature/humidity sensing based on optical fiber Fabry-Perot interference

Liu, Shuangqiang; Ji, Yanda; Yang, Jun; Sun, Weimin; Li, Hanyang

doi:10.1016/j.sna.2017.11.034

Cited by 58 publications

(30 citation statements)

References 32 publications

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“…Despite the lower protonic conductivity of the PSBMA/BNC film in comparison with, for instance, the benchmark Nafion™ ionomer (conductivity of ca. 100 mS cm −1 (94 °C, 98% RH) and water-uptake of 54% [56]) that was recently used as a humidity sensor [57], the attained values are in tune with the zwitterionic nature of the cross-linked PSBMA. For example, Guo et al [58] stated that the anchoring of SBMA to ZIF-8 (zeolitic imidazolate framework) originated a composite membrane with a protonic conductivity of 17.2 mS cm −1 at 65 °C.…”

Section: Resultsmentioning

confidence: 99%

Antimicrobial and Conductive Nanocellulose-Based Films for Active and Intelligent Food Packaging

et al. 2019

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Bacterial nanocellulose (BNC) is becoming an important substrate for engineering multifunctional nanomaterials with singular and tunable properties for application in several domains. Here, antimicrobial conductive nanocomposites composed of poly(sulfobetaine methacrylate) (PSBMA) and BNC were fabricated as freestanding films for application in food packaging. The nanocomposite films were prepared through the one-pot polymerization of sulfobetaine methacrylate (SBMA) inside the BNC nanofibrous network and in the presence of poly(ethylene glycol) diacrylate as cross-linking agent. The ensuing films are macroscopically homogeneous, more transparent than pristine BNC, and present thermal stability up to 265 °C in a nitrogen atmosphere. Furthermore, the films have good mechanical performance (Young’s modulus ≥ 3.1 GPa), high water-uptake capacity (450–559%) and UV-blocking properties. The zwitterion film with 62 wt.% cross-linked PSBMA showed bactericidal activity against Staphylococcus aureus (4.3–log CFU mL−1 reduction) and Escherichia coli (1.1–log CFU mL−1 reduction), and proton conductivity ranging between 1.5 × 10−4 mS cm−1 (40 °C, 60% relative humidity (RH)) and 1.5 mS cm−1 (94 °C, 98% RH). Considering the current set of properties, PSBMA/BNC nanocomposites disclose potential as films for active food packaging, due to their UV-barrier properties, moisture scavenging ability, and antimicrobial activity towards pathogenic microorganisms responsible for food spoilage and foodborne illness; and also for intelligent food packaging, due to the proton motion relevant for protonic-conduction humidity sensors that monitor food humidity levels.

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Section: Resultsmentioning

confidence: 99%

Antimicrobial and Conductive Nanocellulose-Based Films for Active and Intelligent Food Packaging

et al. 2019

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“…Sensors with different structures usually have a transmission spectrum at a specific wavelength and can measure the RH changes in a dynamic range. For example, Nafion film temperature/humidity sensing based on optical fiber Fabry–Perot interference shows a relative humidity sensitivity of 3.78 nm/%RH for the range of 30–85% RH [11], but, the system structure of the proposed sensor is difficult to fabricate. The sensitivity of the PEG/PVA-coated LPFG is higher than that for most of the other configurations like Mach–Zehnder interferometer, side-polished fiber, U-shaped microfiber interferometer, polymer microfiber rings, etc.…”

Section: Resultsmentioning

confidence: 99%

“…Firstly, the amplitude-based techniques detect the change of the optical intensity [3,4,5]. Secondly, the wavelength shift technique is immune to power fluctuation noise, when compared with the optical intensity technique [6,7,8,9,10,11,12,13]. The other techniques [14,15,16] are not used very often and are different from the usual methods, such as detecting phase shift of the light [14] or measuring the strain on the fiber [15].…”

Section: Introductionmentioning

confidence: 99%

“…As for wavelength-based techniques, the transmission spectrum can be used to monitor the RH change of the environment. Several structures, such as cladding-etched optical fiber [6], side-polished fiber [7], fiber Bragg grating [8,9,10], Fabry–Perot interference [11], and long-period fiber grating (LPFG) [12,13] have been proposed. These structures usually have a transmission dip at a specific wavelength, which could be used to measure the surrounding refractive index (SRI).…”

Section: Introductionmentioning

confidence: 99%

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Humidity Sensor Based on a Long-Period Fiber Grating Coated with Polymer Composite Film

Wang

Liu

Zou

et al. 2019

Sensors

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We demonstrate a simple and highly sensitive optical fiber relative humidity (RH) sensor based on a long-period fiber grating (LPFG) coated with polyethylene glycol (PEG)/polyvinyl alcohol (PVA) composite films. The resonance wavelength of the LPFG is sensitive to environmental humidity due to the change in effective refractive index caused by the strong surface absorption and desorption of the porous PEG/PVA coatings. The sensor is sensitive in a wide range from 50% to 95% RH, with a highest sensitivity of 2.485 nm/%RH in the range 50–75% RH. The proposed RH sensor has the advantages of compact size, good reversibility, and stability, which makes it attractive for high-humidity environments.

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“…It has a more compact structure for developing high-performance temperature microprobes. Femtosecond laser [31] or ion beam etching technology [32], as well as high-precision fiber-splicing technology [36,37], can improve its temperature detection limit to as high as 1200 °C, making it suitable for extreme high temperature environments; furthermore, sol coating [35] or temperature-sensitive polymer encapsulation technology [39] can be used for enhance normal temperature microprobes, which will be a promising candidate for implantable microsensors for health or environmental monitoring under 200 °C.…”

Section: Discussionmentioning

confidence: 99%

A High Sensitivity Temperature Sensing Probe Based on Microfiber Fabry-Perot Interference

Zhang

Ren

et al. 2019

Sensors

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In this paper, a miniature Fabry-Perot temperature probe was designed by using polydimethylsiloxane (PDMS) to encapsulate a microfiber in one cut of hollow core fiber (HCF). The microfiber tip and a common single mode fiber (SMF) end were used as the two reflectors of the Fabry-Perot interferometer. The temperature sensing performance was experimentally demonstrated with a sensitivity of 11.86 nm/°C and an excellent linear fitting in the range of 43–50 °C. This high sensitivity depends on the large thermal-expansion coefficient of PDMS. This temperature sensor can operate no higher than 200 °C limiting by the physicochemical properties of PDMS. The low cost, fast fabrication process, compact structure and outstanding resolution of less than 10−4 °C enable it being as a promising candidate for exploring the temperature monitor or controller with ultra-high sensitivity and precision.

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Nafion film temperature/humidity sensing based on optical fiber Fabry-Perot interference

Cited by 58 publications

References 32 publications

Antimicrobial and Conductive Nanocellulose-Based Films for Active and Intelligent Food Packaging

Antimicrobial and Conductive Nanocellulose-Based Films for Active and Intelligent Food Packaging

Humidity Sensor Based on a Long-Period Fiber Grating Coated with Polymer Composite Film

A High Sensitivity Temperature Sensing Probe Based on Microfiber Fabry-Perot Interference

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