Humidity nanosensors for smart manufacturing

Patel, Gautam M.; Shah, Vraj; Bhatt, Gaurang J.; Deota, Pradeep T.

doi:10.1016/b978-0-12-823358-0.00026-5

Cited by 14 publications

(5 citation statements)

References 83 publications

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“…Aniline (density = 1.02 g/cm 3 ) was an ACS reagent grade (99.5%) and chitosan flakes (medium molecular weight) with a deacetylation degree of 80% and a bulk density of 0.7 g/cm 3 were obtained from Sigma-Aldrich, Oakville, ON, Canada. Microcrystalline cellulose powder (D50 particle diameter 20 μm) with [31−38], [47], [48] refs: [43] a bulk density of 0.5 g/cm 3 was procured from Sigma-Aldrich, Oakville, ON, Canada. Carbon nanofibers from Pyrograf, Inc., Cedarville, OH, USA, were submitted to a high heat treatment (up to 1500 °C) with high electrical conductivity, and bulk density of 0.04 g/cm 3 .…”

Section: Shorthand Notationsmentioning

confidence: 99%

“…The results reported herein represent the first example of a systematic study that details such types of ternary PANI-based composites, where renewable biopolymer platforms were used to prepare hybrid biocomposite materials. In comparison with conventional ceramic sensors, − ,, the hybrid biopolymer composites reported herein possess several advantages as sustainable humidity sensor materials, ,− according to selected sustainability metrics that are summarized in Table .…”

Section: Introductionmentioning

confidence: 99%

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Renewable Hybrid Biopolymer/Polyaniline Composites for Humidity Sensing

Anisimov

Evitts

Cree

et al. 2022

ACS Appl. Polym. Mater.

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The current study was focused on electrically conductive polyaniline (PANI)-based polymer composites and their films, which contain poly(vinyl alcohol) (PVA). The goal of this research was to evaluate PANI composites that contain biopolymer platforms (chitosan or cellulose micro-powder) as materials for humidity sensing, which were compared against composites that contain carbon nanofibers in lieu of the biopolymer. Ternary film materials were prepared by a two-step method: (1) in situ polymerization of PANI onto the biopolymer or carbon support to yield a binary composite, and (2) physical blending of the resulting binary composite with PVA to yield a ternary composite in a film form. The following mechanical properties were estimated: (a) elastic (Young’s) modulus and stiffness, (b) ductility and toughness, and (c) yield and tensile strength. The Young’s modulus improved as the chitosan fraction increased, which indicates that chitosan can be used as a mechanical reinforcement additive for PANI-based composites. The electrical properties were characterized by plots of electrical conductivity versus relative humidity, whereas mechanical properties were evaluated using tensile testing. Overall, chitosan-based films showed good mechanical properties, moderate electrical conductivity, and favorable high humidity response and moisture uptake. Cellulose- and carbon-based composites were generally inferior to chitosan for most properties, except for higher conductivity. Due to the high brittleness of carbon-based composites, the practical utility of carbon nanofibers for humidity sensing is limited in the case of pristine carbon materials. This work reveals that ternary PANI-based composites are potential candidates for humidity sensor materials, where moderate PANI-to-chitosan/cellulose/carbon ratios enable good moisture uptake and electromechanical properties of composites. PANI/biopolymer composites are a promising class of sustainable materials due to the ability to tailor their structure and properties, in contrast to conventional ceramic humidity sensor materials.

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Section: Shorthand Notationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Renewable Hybrid Biopolymer/Polyaniline Composites for Humidity Sensing

Anisimov

Evitts

Cree

et al. 2022

ACS Appl. Polym. Mater.

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“…The in situ polymerization process has many benefits, including the use of cost‐effective materials, ease of automation, and the ability to combine with a variety of heating and curing techniques. However, certain disadvantages of this preparation technique are composed of a limited supply of available materials, less time to complete the reaction process, and the need for costly equipment 44–47 …”

Section: Different Types Of Polymeric Nanocomposite and Their Synthesismentioning

confidence: 99%

“…However, certain disadvantages of this preparation technique are composed of a limited supply of available materials, less time to complete the reaction process, and the need for costly equipment. [44][45][46][47] Tommasini et.al, and the group had produced polymethylmethacrylate (PMMA)-silicon carbide (SiC) NC through in-situ polymerization. In this method, PMMA was selected as a polymer while SiC was selected as filler for the incorporation into the polymer.…”

Section: In Situ Polymerizationmentioning

confidence: 99%

Advances in polymeric nanocomposites for automotive applications: A review

Shah

Bhaliya

Patel³

et al. 2022

Polymers for Advanced Techs

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The relevance of polymer nanocomposites (PNCs) in the automobile industry has been booming for the last few decades because this kind of material can fulfill the need for lightweight vehicles, and that leads to low gasoline intake and drain gas emission. This review covers the fundamental aspects of polymer-based nanocomposites and their application in the automotive sector. Following an introduction that comprises the need for PNCs and their rewards over traditional materials for instance, excellent thermal and mechanical strength, eco-friendliness, affordable corrosion resistance, low density, and so on. In addition, the review also covers how these composites can be useful in automotive sector applications. Apart from this, the second section covers the different synthetic approaches (solution casting, melt blending, electrodeposition, electrospinning, in-situ polymerization, and others) for the manufacturing of PNCs and their characterizations using scanning electron microscopy, transmission electron microscopy, Fourier transform electron microscopy, X-ray diffraction spectroscopy, energy dispersive X-ray analysis, and other techniques. Afterward, the applications of PNCs in different parts of vehicles such as automotive coatings, tires, glasses, and inner parts of the vehicles, extra will be discussed. Finally, discussions related to key areas of PNCs and future perspectives are explained.

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“…These sensors make processes more efficient and improve our everyday life. Developing durable, highly responsive, and affordable humidity sensors remains a challenging task [9,10]. Even though materials like ceramics [11], semiconductors [12], and polymers [13] are typically used in sensor fabrication, the potential of biomaterials is largely untapped.…”

Section: Introductionmentioning

confidence: 99%

Eco-Friendly, High-Performance Humidity Sensor Using Purple Sweet-Potato Peel for Multipurpose Applications

et al. 2023

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Biomaterials offer great potential for enhancing the performance of humidity sensors, which play a critical role in controlling moisture levels across different applications. By utilizing environmentally friendly, sustainable, and cost-effective biomaterials, we can improve the manufacturing process of these sensors while reducing our environmental impact. In this study, we present a high-performance humidity sensor that utilizes purple sweet potato peel (PSPP) as both the substrate and sensing layer. The PSPP is chosen for its polar hydrophilic functional groups, as well as its environmentally friendly nature, sustainability, and cost-effectiveness. Remarkably, this humidity sensor does not require an external substrate. It exhibits a wide detection range of 0 to 85% relative humidity at various operating frequencies (100 Hz, 1 kHz, and 10 kHz) in ambient temperature, demonstrating its effectiveness in responding to different humidity levels. The sensor achieves a high sensitivity value of 183.23 pF/%RH and minimal hysteresis of only 5% at 10 kHz under ambient conditions. It also boasts rapid response and recovery times of 1 and 2 s, respectively, making it suitable for use in high-end electronic devices. Moreover, the sensor’s applications extend beyond environmental monitoring. It has proven effective in monitoring mouth and nasal breathing, indicating its potential for respiratory monitoring and noncontact proximity response. These findings suggest that sweet potato peel material holds great promise as a highly stable, non-toxic, biodegradable, cost-effective, and environmentally friendly option for various domains, including healthcare monitoring.

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Humidity nanosensors for smart manufacturing

Cited by 14 publications

References 83 publications

Renewable Hybrid Biopolymer/Polyaniline Composites for Humidity Sensing

Renewable Hybrid Biopolymer/Polyaniline Composites for Humidity Sensing

Advances in polymeric nanocomposites for automotive applications: A review

Eco-Friendly, High-Performance Humidity Sensor Using Purple Sweet-Potato Peel for Multipurpose Applications

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