Sensor Applications of Polyimides

Paşahan, Aziz

doi:10.5772/53456

Cited by 9 publications

(4 citation statements)

References 43 publications

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“…Ecoflex ® was selected for its easy preparation and application and for the resulting mechanical characteristics, such as elasticity (although other materials could have been used with different results in terms of elasticity and adhesion to the textile and the sensor) [36]. Polyimide is a moisture-absorbing material [17], so embedding it in elastomer also confers protection by stabilizing the material properties.…”

Section: Textile Integrationmentioning

confidence: 99%

“…Polyimide-based (PI, also known as Kapton ® ) sensors, in particular, have been employed by directly using flexible strips (containing sensing regions) as threads, with or without textile coverings [10][11][12][13][14][15][16]. Polyimide is a polymer compatible with the microfabrication of thin-film sensors [17], such as tactile, pressure [18], and moisture sensors, either with capacitive [19] or resistive [20] transduction. The degree of biocompatibility and skin compliance [21] is also an advantage.…”

Section: Introductionmentioning

confidence: 99%

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Flexible Pressure and Temperature Microsensors for Textile-Integrated Wearables

dos Santos,

Queiroz,

Garcia

et al. 2024

Actuators

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Environmental factors, such as pressure and temperature, are known to contribute to the formation of ulcers that seriously affect bedridden individuals. Researchers have proposed several technologies to achieve the long-term monitoring of those parameters, usually relying on sensing mats, which poses difficulties in correlating the measurements with specific parts of the body. In this work, we aim to develop microsensors to be integrated into patient clothing. They should be highly flexible, thin with a small footprint, and can be achieved by taking advantage of the microfabrication on polyimide (PI) thin-film substrates (total device thicknesses below 30 µm). Both resistive and capacitance transduction mechanisms were explored, targeting operation ranges of 1 to 40 kPa and 24 to 42 °C. The sensors were integrated into textiles using silicone elastomers and electrical connections based on conductive silver yarn. The experimental characterization showed a nominal capacitance of 21 pF, a sensitivity of −8.44 fF/kPa for the pressure sensors, and a 0.0021 Ω/Ω°C sensitivity of the temperature sensor (with resistance of 29 kΩ at 22 °C). The proposed approach can potentially be implemented not only in wearable devices but also in many other applications for health monitoring or human–machine interfaces.

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Section: Textile Integrationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flexible Pressure and Temperature Microsensors for Textile-Integrated Wearables

dos Santos,

Queiroz,

Garcia

et al. 2024

Actuators

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“…Aromatic polyimides are the most common because of their superior degree of physical and mechanical qualities and capacity to operate over a wide temperature range. 14 Thus, the temperature of the beginning of their active thermal destruction reaches 430 °C, which makes such materials one of the most heat-resistant polymers. Polyimides are used for making structural and tribotechnical parts that can work at temperatures up to 300 °C.…”

Section: Literary Reviewmentioning

confidence: 99%

“…Polyimides are used for making structural and tribotechnical parts that can work at temperatures up to 300 °C. 14…”

Section: Literary Reviewmentioning

confidence: 99%

Polymer composites based on aromatic polyamide and fillers of spherical and layered structure for friction units of high-performance equipment

Каbаt

Girin

Heti

2023

Proceedings of the Institution of Mechanical Engineers, Part L:

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Without the employment of new equipment, with units functioning at high levels of weights, sliding speeds and temperatures, the current growth of the sector is all but impossible. High levels of labour intensity have a detrimental impact on the dependability and durability of the product. Moving joints, which comprise friction units, frequently fail at the same time. It is vital to increase their dependability and durability. This can be accomplished by substituting more recent materials with higher-quality qualities for the friction pair materials. To create such materials, the researchers created an aromatic polyamide polymer that was filled with silicon- (silica gel, bentonite) and carbon-containing (technical carbon, graphite) components. It was determined that depending on their nature, structure and content in the polymer matrix, the addition of these fillers enables the reduction of the coefficient of friction and wear of the produced polymer composites by 1.5–2.5 and 20–40 times, respectively, during frictional interaction with steel. It was found that 10–15% by weight of the examined fillers in aromatic polyamide is the ideal concentration. It has been proven that polymer composites filled with layered materials (bentonite, graphite) perform better in terms of tribological qualities when in contact with steel than those filled with spherical elements (technical carbon, silica gel). The improvement of the tribological properties of the developed polymer composites in comparison to the original polymer was determined based on the microphotographs of steel surfaces and the study of their morphological (roughness) and physical (microhardness) properties. It was determined that the change in the friction nature was due to the creation of an antifriction coating on the metal friction surface from the products of tribochemical reactions occurring during friction.

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High‐performance polyimide film based hybrid nanostructures: Synthesis, characterization, and properties investigation

2016

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In this research work, multihybrid nanostructures (carbon nanotube-graphene oxide-zinc oxide) based highperformance polyimide (PI) nanocomposites were prepared via in situ polymerization and their properties (morphological, electrical, and viscous behaviors) were investigated. PI of industrial and laboratory grades was used to study their thermal imidization step after addition of various loadings of multihybrid nanostructures. The use of optimum amount of multihybrid nanostructures seems to be useful to overcome the use of higher amount of different conductive fillers to prepare PIbased high-performance nanocomposites for various applications. This study also provides a facile and promising strategy to fabricate multihybrid nanostructured high-performance PI nanocomposites, which can be used as coating materials in various harsh conditions. POLYM. COMPOS., 00:000-000, 2016. FIG. 7. (a) TEM micrographs and (b) schematic view of CNT-graphene oxide/ZnO hybrid nanostructured composites. (Reprinted with permission of [92]) [Color figure can be viewed at wileyonlinelibrary.com]

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Sensor Applications of Polyimides

Cited by 9 publications

References 43 publications

Flexible Pressure and Temperature Microsensors for Textile-Integrated Wearables

Flexible Pressure and Temperature Microsensors for Textile-Integrated Wearables

Polymer composites based on aromatic polyamide and fillers of spherical and layered structure for friction units of high-performance equipment

High‐performance polyimide film based hybrid nanostructures: Synthesis, characterization, and properties investigation

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