A Conductive Composite Nanomaterial with Biocompatible Matrix and Multilayer Carbon Nanotubes

Ичкитидзе, Л. П.; Podgaetsky, Vitaly M.; Prihodko, A. S.; Putra, B. M.; Blagov, E. V.; Павлов, А. А.; Galperin, V. A.; Kitsyuk, E. P.; Shaman, Yu. P.

doi:10.1007/s10527-013-9337-6

Cited by 8 publications

(4 citation statements)

References 7 publications

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“…It should be mentioned that the biological application and biocompatibility of BSA and MCC polymers were confirmed in a previous study [ 26 ]. Previous studies also confirmed that CNT is one of the most optimal nanofillers when used with polymer matrices in biological applications [ 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 ]. In addition to using the enhanced IPMC with BSA-CNT and MCC-CNT electrodes, we also used the IPMC with common electrodes (platinum and gold) for data validation and comparing the efficiency of enhanced IPMCs and common IPMCs.…”

Section: Methodsmentioning

confidence: 63%

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Enhanced Ionic Polymer–Metal Composites with Nanocomposite Electrodes for Restoring Eyelid Movement of Patients with Ptosis

et al. 2023

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The present study aims to use enhanced ionic polymer–metal composites (IPMC) as an artificial muscle (a soft-active actuator) to restore eyelid movement of patients with ptosis. The previous eyelid movement mechanisms contained drawbacks, specifically in the lower eyelid. We used finite element analysis (FEA) to find the optimal mechanism among two different models (A and B). In addition to common electrodes of IPMC (gold and platinum), the bovine serum albumin (BSA) and microcrystalline cellulose (MCC) polymers, with optimal weight percentages of carbon nanotube (CNT) nanofiller, were also utilized as non-metallic electrodes to improve the efficiency of the IPMC actuator. In both models, IPMC with nanocomposite electrodes had higher efficiency as compared to the metallic electrodes. In model A, which moved eyelids indirectly, IPMC with MCC-CNT electrode generated a higher force (25.4%) and less stress (5.9 times) as compared to IPMC with BSA-CNT electrode. However, the use of model A (even with IPMCs) with nanocomposite electrodes can have limitations such as possible malposition issues in the eyelids (especially lower). IPMC with MCC-CNT nanocomposite electrode under model B, which moved eyelids directly, was the most efficient option to restore eyelid movement. It led to higher displacements and lower mechanical stress damage as compared to the BSA-CNT. This finding may provide surgeons with valuable data to open a window in the treatment of patients with ptosis.

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Section: Methodsmentioning

confidence: 63%

“…The constant values for Ɛ,

(Faraday constant), and

(initial cation concentration) were defined 2 m·F/m, 96485.34 s·A/mol, and 1200 mol/m 3 , respectively [ 40 ]. Material properties of the IPMC substructures are listed in Table 1 [ 26 , 27 , 28 , 29 , 30 , 41 , 42 , 43 ].…”

Section: Methodsmentioning

confidence: 99%

Enhanced Ionic Polymer–Metal Composites with Nanocomposite Electrodes for Restoring Eyelid Movement of Patients with Ptosis

et al. 2023

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“…Laser exposure has been used to improve electrical performance and sensitivity due to the previously demonstrated effect of forming strong MWCNT networks with an increased electrical conductivity of the material [ 39 , 40 , 46 ]. This includes the proven effect of the enhanced electrical conductivity in various polymer and biopolymer matrices [ 31 , 32 , 33 , 34 , 41 , 42 ]. This approach allows for the use of low MWCNT concentrations (3 wt%) without the loss of sensitivity at large strains.…”

Section: Methodsmentioning

confidence: 99%

“…Laser exposure is a universal and inexpensive method for modifying and assembling polymer composites [ 31 , 32 , 33 , 34 , 35 ]. Laser exposure of composites with CNT can significantly increase electrical conductivity by increasing the concentration of the carbon filler until the electrical conductivity percolation threshold is reached [ 36 ].…”

Section: Introductionmentioning

confidence: 99%

Laser-Formed Sensors with Electrically Conductive MWCNT Networks for Gesture Recognition Applications

et al. 2023

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Currently, an urgent need in the field of wearable electronics is the development of flexible sensors that can be attached to the human body to monitor various physiological indicators and movements. In this work, we propose a method for forming an electrically conductive network of multi-walled carbon nanotubes (MWCNT) in a matrix of silicone elastomer to make stretchable sensors sensitive to mechanical strain. The electrical conductivity and sensitivity characteristics of the sensor were improved by using laser exposure, through the effect of forming strong carbon nanotube (CNT) networks. The initial electrical resistance of the sensors obtained using laser technology was ~3 kOhm (in the absence of deformation) at a low concentration of nanotubes of 3 wt% in composition. For comparison, in a similar manufacturing process, but without laser exposure, the active material had significantly higher values of electrical resistance, which was ~19 kOhm in this case. The laser-fabricated sensors have a high tensile sensitivity (gauge factor ~10), linearity of >0.97, a low hysteresis of 2.4%, tensile strength of 963 kPa, and a fast strain response of 1 ms. The low Young’s modulus values of ~47 kPa and the high electrical and sensitivity characteristics of the sensors made it possible to fabricate a smart gesture recognition sensor system based on them, with a recognition accuracy of ~94%. Data reading and visualization were performed using the developed electronic unit based on the ATXMEGA8E5-AU microcontroller and software. The obtained results open great prospects for the application of flexible CNT sensors in intelligent wearable devices (IWDs) for medical and industrial applications.

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Layers of Composite Nanomaterials as Prototype of a Tensoresistor Sensor

Ичкитидзе

Gerasimenko

Telyshev

et al. 2019

Springer Proceedings in Physics

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A Conductive Composite Nanomaterial with Biocompatible Matrix and Multilayer Carbon Nanotubes

Cited by 8 publications

References 7 publications

Enhanced Ionic Polymer–Metal Composites with Nanocomposite Electrodes for Restoring Eyelid Movement of Patients with Ptosis

Enhanced Ionic Polymer–Metal Composites with Nanocomposite Electrodes for Restoring Eyelid Movement of Patients with Ptosis

Laser-Formed Sensors with Electrically Conductive MWCNT Networks for Gesture Recognition Applications

Layers of Composite Nanomaterials as Prototype of a Tensoresistor Sensor

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