Flexible Strip Research Articles

Experimental analysis of the bond-slip characteristics between CFRP and natural stone masonry units

Purpose Although the reinforcement of concrete and brick masonry with fiber-reinforced polymer (FRP) has been extensively researched, its application and impact on natural stone, especially in historic preservation, have received less attention. This study aims to examine the bond-slip characteristics of carbon fiber-reinforced polymer (CFRP) with two types of natural stone masonry, aiming to enhance their effectiveness in reinforcing historic structures. The stones studied include one from the Chouf-Lekdad region (A) and another from a historic structure in Sétif City (B). Both stones were strengthened using CFRP and carbon fiber fabric (CFF) through near-surface mount (NSM) and external bonding (EBR) techniques. Design/methodology/approach The interaction was assessed during the pull-out test by analyzing the stress transfer mechanisms, adhesion and deformation. This study also examines the effects of the following parameters on the bond between CFRP and stone: type of stone (A and B), type of reinforcement (plat CFRP and CFF), various notch shapes and sizes (bp, tp and Lb), and reinforcement techniques (NSM and EBR). Findings This study demonstrated the practicality and effectiveness of enhancing natural stone masonry of old buildings by integrating NSM and EBR techniques with CFRP. With a bond length of 30 mm, the pull-out force correlates with the strength of the stone. This indicates the importance of stone strength in obtaining better adhesion. The CFF–resin interface is more cohesive than the CFRP plate–resin interface because the resin penetrates the flexible CFF strip, ensuring better adhesion. In contrast, the CFRP plate interface is rigid and smooth. The results suggest that natural stone–CFRP adhesion is more effective than CFRP bonded to concrete and brick masonry due to the stone's strong resistance. Originality/value This experimental investigation provides new study into the bond-slip behavior of CFRP-reinforced natural stone masonry, filling the gap in existing research. The findings offer useful direction for creating FRP strengthening solutions that are specifically adapted to the properties of natural stone used in historic constructions. This study helps to improve preservation procedures by guiding the selection of reinforcing techniques, such as NSM versus EBR, and finding ideal bond lengths. This work's novelty stems from its ability to improve the structural integrity of culturally significant buildings while preserving their historical authenticity.

Flexible electrospun test strips functionalized with a graphene oxide/doxorubicin complex for dopamine detection

A novel flexible test strip has been developed for the selective and sensitive detection of dopamine (DA) using an electrospun polyacrylonitrile nanofiber membrane as a substrate and doxorubicin (DOX)-functionalized graphene oxide (GO) as a fluorescent ligand. Employing the Langmuir-Blodgett technique, the fluorescent probe of GO/DOX was controllably and flatly applied onto the surface of nanofiber membranes. The adsorption behavior of DA and DOX on GO in solution and on the surface of solid test strips has been investigated, respectively. The results showed that DA exhibited a higher affinity for GO, both in solution and on the surface of test strips, compared to DOX. Due to the competitive adsorption of DOX and DA onto GO, the addition of DA to the GO/DOX complex led to a significant fluorescence enhancement, attributed to the replacement of the GO-supported DOX with DA of a higher adsorption affinity to GO, enabling the detection of DA. This nanofiber-based method proves to be simple, sensitive, selective, and effectively minimizes interference from common biomolecules and small molecules in serum. Thus, this portable, cost-effective, and selective nanofiber strip holds great promise for early diagnosis of neurodegenerative diseases by measuring DA levels.

Cu@MOF core-shell aerogel: High enzyme-like activity for ultratrace colorimetric detection of Hg2+ ions

Achieving highly sensitive and selective detection of trace-level heavy metals while maintaining high portability and simplicity remains an intractable challenge. Herein, we report an efficient nanozyme-based colorimetric assay for Hg2+ ion analysis based on a facile design of Cu-based metal@MOF core-shell (Cu@MOF) aerogel. The Cu@MOF aerogel exhibits both aerogel properties (i.e., high porosity and large surface area) and core-shell features (i.e., metal-MOF interfaces). These features largely improve its peroxidase-like activity with a catalytic constant (Kcat) of 4.29×106 s−1, far surpassing the efficiency of both pure Cu aerogel and Cu-MOFs. The superior structure facilitates Hg-triggered amalgam at the metal-MOF interfaces upon exposure to Hg2+ ions, which readily improves the peroxidase-like activity. Consequently, a highly sensitive and selective colorimetric assay has been developed for Hg2+ analysis with a detection range of 10–3000 ng·L−1 and a detection limit as low as 9.33 ng·L−1. Furthermore, high portability and simplicity has been achieved by translating this assay into a flexible and affordable test strip by depositing the as-obtained Cu@MOF aerogel on filter paper. This work not only enables an accurate and convenient analysis of heavy metal ions, but also offers a novel direction for the development of cost-effective nanozyme assays.

Comparative Analysis of Peltier Devices and Flexible Heater Strips for Enhancing Bandwidth in Thermo-Active Soft Actuators

Soft actuators are a new generation of robotic actuators designed for safer and more adaptable physical human-robot interaction, that can be triggered by various stimulating mechanisms, including pneumatic, electric, electromagnetic, light, magnetic, and thermal sources. Among the different types of soft actuators, thermoresponsive ones that utilize heat as the stimulus show great potential due to their ability to deliver a relatively high force-to-size ratio without the need for external air pumps, tethers, high voltage sources, or complex designs. However, a major drawback of such actuators is their limited bandwidth. Traditional methods rely on Joule heating for actuation, with the actuator deflating when the heat source is turned off and ambient temperature takes over. Recently, the Peltier mechanism has been introduced as an alternative approach for active heating and cooling. This research paper presents a comparative analysis of the Peltier and flexible heater mechanisms in terms of the bandwidth and energy consumption of phase-change thermo-active soft actuators. The study aims to assess the potential of Peltier-based actuation in addressing the bandwidth limitations observed in traditional soft actuators. The findings reveal that Peltier-based actuation can significantly improve actuation speed in thermoresponsive soft actuators. However, it is important to note that the performance of Peltier-based actuators decreases after a few cycles unless additional measures, such as the use of an external fan, are implemented. This increase in performance comes at the cost of higher energy consumption, which should be carefully considered in practical applications.

Characterization of Magnetorheological Impact Foams in Compression.

This study focuses on the development and compressive characteristics of magnetorheological elastomeric foam (MREF) as an adaptive cushioning material designed to protect payloads from a broader spectrum of impact loads. The MREF exhibits softness and flexibility under light compressive loads and low strains, yet it becomes rigid in response to higher impact loads and elevated strains. The synthesis of MREF involved suspending micron-sized carbonyl Fe particles in an uncured silicone elastomeric foam. A catalyzed addition crosslinking reaction, facilitated by platinum compounds, was employed to create the rapidly setting silicone foam at room temperature, simplifying the synthesis process. Isotropic MREF samples with varying Fe particle volume fractions (0%, 2.5%, 5%, 7.5%, and 10%) were prepared to assess the effect of particle concentrations. Quasi-static and dynamic compressive stress tests on the MREF samples placed between two multipole flexible strip magnets were conducted using an Instron servo-hydraulic test machine. The tests provided measurements of magnetic field-sensitive compressive properties, including compression stress, energy absorption capability, complex modulus, and equivalent viscous damping. Furthermore, the experimental investigation also explored the influence of magnet placement directions (0° and 90°) on the compressive properties of the MREFs.

Scalable Crystalline Silicon Photovoltaic Fibers for Electronic Textile Applications

AbstractThis study presents a novel method to fabricate scalable photovoltaic fibers (PVFs) by leveraging crystalline silicon (c‐Si) solar cell technology, known for its high‐power conversion efficiency (PCE), stable performance, and low cost. The c‐Si PVF is built on a flexible circuit strip as narrow as 400 µm, and c‐Si cells as small as 0.35 mm2 are surface‐mounted on the strip. The cells are diced from an interdigitated back‐contact c‐Si solar cell (≈153 cm2). A c‐Si PVF including a 1 mm2 cell reaches PCE up to 9.6% and 11.0% under simulated AM 1.5G illumination without and with encapsulation, respectively, the highest reported for c‐Si PVFs, while a 1.5 ft‐long fiber produces ≈37 mW m−1. Additionally, the PVF can tolerate bending fatigue with no sign of performance loss after 8000 bending cycles. To demonstrate practical applicability, the c‐Si PVFs are also woven into textile swatches. They deliver ≈10 mW cm−2 under a halogen lamp and successfully power a light‐emitting‐diode. This PVF technology is scalable with regards to both achieving thin fibers and its compatibility with roll‐to‐roll fabrication processes. The fiber concept presented here can also be extended to any chip‐scale surface mountable devices, enabling cell‐agnostic fiber technologies for multifunctional electronic textiles.

Оптимизация эксплуатации газобаллонного оборудования технологического транспорта АК «АЛРОСА», использующего компримированный природный газ в качестве моторного топлива в условиях Якутии

The paper justifies the relevance of using compressed natural gas as the motor fuel for utility vehicles in conditions of the high north and the Republic of Yakutia. Natural gas as an alternative energy carrier is stated to have a number of advantages over diesel fuel, however, its use in extremely low temperatures, in particular, in Yakutia, is associated with some challenges. A number of technical solutions are proposed to maintain a constant temperature of compressed natural gas contained in the gas cylinders onboard of the utility vehicles. The paper provides a detailed description of the methods to maintain the required temperature of the compressed natural gas in the gas cylinders using heat from the exhaust gases of the combustion engine, as well as by means of flexible electric strip heaters. One of the possible ways to separate heavy hydrocarbons (C5-C7) that negatively affect the performance characteristics of the combustion engines and the operation efficiency of the gas cylinder equipment is described for production of the compressed natural gas for utility vehicles. Technical requirements are determined for rubber products of the gas cylinder equipment that operate at low ambient temperatures. The article suggests the optimal quality characteristics of the frost-resistant rubbers and sealing materials that are most suitable for application in conditions of Yakutia.

Rapid and Visual Detection of Volatile Amines Based on Their Gas-Solid Reaction with Tetrachloro-p-Benzoquinone.

The detection of volatile amines is necessary due to the serious toxicity hazards they pose to human skin, respiratory systems, and nervous systems. However, traditional amines detection methods require bulky equipment, high costs, and complex measurements. Herein, we report a new simple, rapid, convenient, and visual method for the detection of volatile amines based on the gas-solid reactions of tetrachloro-p-benzoquinone (TCBQ) and volatile amines. The gas-solid reactions of TCBQ with a variety of volatile amines showed a visually distinct color in a time-dependent manner. Moreover, TCBQ can be easily fabricated into simple and flexible rapid test strips for detecting and distinguishing n-propylamine from other volatile amines, including ethylamine, n-butyamine, n-pentamine, n-butyamine and dimethylamine, in less than 3 s without any equipment assistance.

Intraoperative ECoG in bottom-of-the-sulcus syndrome using a novel flexible strip electrode.

The recording of epileptiform discharges from bottom-of-sulcus focal cortical dysplasia (BOSD) is often difficult during intraoperative electrocorticography (ECoG) due to the deep localization. We describe the use in this scenario of a new-generation electrode strip with high flexibility, easily adapted to cortical gyri and sulci. A right-handed 20-year-old male with drug-resistant focal epilepsy due to BOSD of the inferior frontal gyrus and daily focal aware seizures was evaluated for epilepsy surgery. Based on electroclinical and neuroimaging results, a focal cortectomy guided by ECoG was proposed. ECoG recordings were performed with new-generation cortical strips (Wise Cortical Strip; WCS®) and standard cortical strips. ECoG, performed on the convexity of the frontal cortical surface, recorded only sporadic spikes with both types of strips. Then, after microsurgical trans-sulcal dissection, WCS was molded along the sulcal surface of the suspected BOSD based on 3D-imaging reconstruction, showing continuous/subcontinuous 3-4-Hz rhythmic spike activity from the deepest electrode. Registration after resection of the BOSD did not show any epileptiform activity. Pathology showed dysmorphic neurons and gliosis. No surgical complications occurred. The patient is seizure-free after 12 months. This single case experience shows that highly flexible electrode strips with adaptability to cortical gyrations can identify IEDs originating from deep location and could therefore be useful in cases of bottom of the sulcus dysplasia.

A reliable, battery-free and implantable magnetic sensing system for wireless monitoring of spinal motion in rats and humans

Continuous monitoring of spinal and joint motions in patients allows surgeons to optimize patient rehabilitation. However, the current monitoring approaches are achieved via tethered devices, which are inconvenient and associated with a risk of infections. In this study, we developed and validated a new type of reliable wireless, battery-free, and implantable sensing system (RWBS) for the real-time monitoring of physiological bending of spines and joints. The RWBS exploits the unique movement-sensing capabilities of an implantable flexible magnetic strip, the signals from which are detected with an external receiver. We implanted this magnetic strip beneath the skins of Sprague Dawley rats and human cadavers and demonstrated that in combination with the receiver, the magnetic strip enabled real-time in vivo and wireless monitoring of motions in both rats (anesthetized/awake) and human cadavers. The adaptability of RWBS in other human bones has been verified by sensing the motions of elbow joints and knee joints. The simple design of the RWBS allowed it to continue functioning in vivo after the magnetic strip had been broken into two or more pieces, indicating its high reliability. Thus, the RWBS is biocompatible, exhibits excellent functionalities, and can be conveniently implemented in both rats and humans. This device will help to facilitate the post-surgery monitoring of spinal and joint movements of human patients.

Nano-modified screen-printed electrode-based electrochemical immunosensors for oral cancer biomarker detection in undiluted human serum and saliva samples.

This proposed work reports the development of in-house made conductive ink-based screen-printed electrodes (SPEs) for label-free detection of oral cancer biomarkers. Carbon ink synthesis includes graphite powder, gum arabic, and water. The selectivity test of the fabricated SPE involves immobilizing antibodies specific to biomarkers and challenges with redox-active interference, other serum molecules, and non-target biomarkers. Three different biomarkers, cytokeratin-19 fragment (CYFRA 21-1), interleukin 8 (IL-8), and tumor protein p53 (TP-53), act as target entities for the detection of oral cancer in patients' samples (serum, N = 28, and saliva, N = 16) at an early stage. The standard technique enzyme-linked immunosorbent assay (ELISA) was employed to estimate the concentration of the biomarkers in serum and saliva samples. SPEs contain amine (-NH2) functional groups involved in covalent bonding with the carboxyl (-COOH) groups of antibody molecules. These immunosensors exhibited remarkably lower detection limits of 829.5 pg mL-1, 0.543 pg mL-1, and 1.165 pg mL-1, and excellent sensitivity of 0.935 μA mL pg-1 cm-1, 0.039 μA mL pg-1 cm-1, and 0.008 μA mL pg-1 cm-1 for CYFRA 21-1, IL-8, and TP-53 biomarkers, respectively. This sensing platform does not require any functionalization for biomolecule immobilization. Thus, it is a cost-effective, disposable, flexible, miniaturized, and sensitive strip to detect oral cancer biomarkers.

Flexible non-enzymatic glucose strip for direct non-invasive diabetic management

Daily glucose measurements represent the routine practice for monitoring and managing diabetes. Current glucose/sugar analysis is dominated by intrusive finger-prick blood-based methods, which hinder the diabetic community in practical implementations. Nonenzymatic glucose sensors based on transition metals have shown robust glucose analysis performance in non-invasive biofluids. However, transition metals-based nonenzymatic glucose sensors are usually operated in an alkalic medium, thus strictly prohibiting further translational developments. To resolve this issue, we propose a facile strategy to construct flexible nonenzymatic glucose strips (NEGS) for practical, non-invasive glucose analysis. The processed alkaline hydrogel patch was loaded onto the NGS to mimic the electrolyte medium for glucose reaction. The assembled hydrogel patch NEGS could detect glucose levels down to 1 µM, with an excellent linearity response from 10 µM to 3 mM and negligible current responses toward the excessive additions of potential interferences. As a proof of concept, these prepared devices were used for the glucose analysis of real sweat and saliva samples. Additionally, non-invasive biofluids of both healthy and diabetic subjects were synchronously compared, offering new insights into precision diabetic management by directly measuring the glucose levels in the non-invasive biofluidic samples without being cumbersomely correlated to blood glucose.

Photo‐activated shape memory polymer with chiral twisting based on anisotropic bilayer thin sheets

AbstractThe remotely controlled shape memory behaviors of a two‐dimensional (2D) sheet to controlled helix structure upon external stimuli is of great significance in the field of smart materials. Herein, we devise a strategy to fabricate a series of shape memory polycaprolactone/W18O49 nanowire film via highly efficient UV‐triggered thiol‐acrylate click chemistry. The resultant polymer composites exhibited desirable photothermal transfer efficiency and can enable rapid temperature increase over the melting temperature of polymeric matrix, thus remotely actuating shape transformation within 8 s. Owing to the well‐defined architecture of the polymer network, the fabricated elastic composite film exhibited a high degree of crystallinity and showed excellent shape memory properties with Rf of 93.12% and Rr of 95.32%. Remarkably, under a 160 mW/cm2 simulated sunlight illumination, the transformation of flat 2D film into 3D chiral actuators is driven by designing anisotropic bilayer thin sheet, and it yields right‐ and left‐handed helix. This work will pave the way for designing biomimetic flexible actuators toward multifunctional shape‐shifting devices.Highlights Shape memory polycaprolactone/W18O49 nanowires composite film is fabricated via UV‐triggered thiol‐ene click chemistry. Polymer composites exhibit light‐activated shape memory behaviors. The composite films show excellent shape fixity and shape recovery ratio based on the well‐defined network. The shape morphing behaviors of a flexible 2D bilayer strip into 3D chiral actuators are achieved.

Smartphone-Assisted Flexible Electrochemical Sensor Platform by a Homology DNA Nanomanager Tailored for Multiple Cancer Markers Field Inspection.

In this work, an ingenious sensor technology was established by integrating the EBFCs on a flexible paper strip carrier (PE) that was used for simultaneous detection of tumor markers in complex samples. Adopting high performance ultrathin graphdiyne (U-GDY) as the substrate can increase the enzyme load, accelerate the electron transfer rate, and significantly enhance the detection sensitivity. A homologous DNA nanomanager strategy cleverly uses signal switches to recycle and amplify target miRNAs, while the smartphone receives real-time instantaneous current values to realize multivariate detection. Electrochemical data show that the detection limits (LODs) of miRNA-21 and miRNA-155 are 0.09 and 0.15 fM in the wide concentration range. The results confirm that the tailored sensor platform provides a strategy for the early cancer diagnosis and lays the foundation for the construction of a flexible wearable platform.

Flexible and sustainable printed sensor strips for on-site, fast decentralized self-testing of urinary biomarkers integrated with a portable wireless analyzer

Flexible and sustainable electronic devices may fulfill the requirements of Sustainable Development Goals (SDGs) contained in Agenda 2030 from United Nations, however, the use of degradable and eco-friendly devices for rapid, selective and on-site decentralized monitoring of patient health status with portable systems toward diagnosis, fast decision and medical interventions is relatively new. Herein, we introduce flexible and sustainable substrates/support of degradable bio-based PLA films from renewable resources produced by casting method as a sustainable alternative to conventional petroleum-based plastics toward portable electronic devices and sensing applications. The flexible devices containing full electrochemical sensing system were built with screen-printing process on PLA sustainable substrates for on-site, rapid decentralized monitoring of molecular biomarkers in non-invasive sample. Reliable urinary dopamine and uric acid analysis with limit of detections of 0.138 µM and 0.595 µM could be performed with low-cost sustainable devices (<US$ 0.08 per unit) in undiluted human urine using a flexible sensor strip coupled with a Sensit BT portable analyzer connected via Bluetooth to a smartphone, laptop or tablet. The flexible eco-friendly sensor was highly robust against severe bending strains, reproducible and selective without interference from other compounds in human urine. The sustainable sensor response was fast within 3 min with an analytical performance comparable to the gold standard method.

Novel Hybrid Electrode Coatings Based on Conjugated Polyacid Ternary Nanocomposites for Supercapacitor Applications.

Electrochemical behavior of novel electrode materials based on polydiphenylamine-2-carboxylic acid (PDPAC) binary and ternary nanocomposite coatings was studied for the first time. Nanocomposite materials were obtained in acidic or alkaline media using oxidative polymerization of diphenylamine-2-carboxylic acid (DPAC) in the presence of activated IR-pyrolyzed polyacrylonitrile (IR-PAN-a) only or IR-PAN-a and single-walled carbon nanotubes (SWCNT). Hybrid electrodes are electroactive layers of stable suspensions of IR-PAN-a/PDPAC and IR-PAN-a/SWCNT/PDPAC nanocomposites in formic acid (FA) formed on the flexible strips of anodized graphite foil (AGF). Specific capacitances of electrodes depend on the method for the production of electroactive coatings. Electrodes specific surface capacitances Cs reach 0.129 and 0.161 F∙cm-2 for AGF/IR-PAN-a/PDPACac and AGF/IR-PAN-a/SWCNT/PDPACac, while for AGF/IR-PAN-a/PDPACalk and AGF/IR-PAN-a/SWCNT/PDPACalk Cs amount to 0.135 and 0.151 F∙cm-2. Specific weight capacitances Cw of electrodes with ternary coatings reach 394, 283, 180 F∙g-1 (AGF/IR-PAN-a/SWCNT/PDPACac) and 361, 239, 142 F∙g-1 (AGF/IR-PAN-a/SWCNT/PDPACalk) at 0.5, 1.5, 3.0 mA·cm-2 in an aprotic electrolyte. Such hybrid electrodes with electroactive nanocomposite coatings are promising as a cathode material for SCs.

An Easy-to-Use Magnetic Dynamometer for Teaching Newton’s Third Law

The study of Newtonian mechanics gives students the first chance to question their commonsense assumptions and replace them with a more comprehensive worldview. Newtonian mechanics is a cornerstone of contemporary science. Furthermore, despite its essential significance, multiple studies demonstrate how challenging it is to properly comprehend the key elements of Newton’s equations. Any initiatives to increase their teaching options are therefore encouraged. In order to help instructors in particular applications of Newton’s third rule of action-reaction, we provide an experimental instrument. Our method consists of two flexible plastic strip dynamometers that have miniature neodymium magnetic disks connected to them. The amount of force being transferred using a magnetic field is shown by the plastic strip’s radial distance. This very affordable arrangement is simple to assemble, efficient, and appropriate for many programs that call for many trial kits.

Numerical study of submerged bending vegetation under unidirectional flow

Submerged vegetation commonly grows and plays a vital role in aquatic ecosystems, but it is also regarded as a barrier to the passing flow. Numerical simulations of flow through and over submerged vegetation were carried out to investigate the effect of vegetation density on flow field. Numerical simulations were computationally set up to replicate flume experiments, in which vegetation was mimicked with flexible plastic strips. The fluid–structure interaction between flow and flexible vegetation was solved by coupling the two modules of the COMSOL packages. Two cases with different vegetation densities were simulated, and the results were successfully validated against the experimental data. The contours of the simulated time-averaged streamwise velocity and Reynolds stress were extracted to highlight the differences in mean and turbulent flow statistics. The turbulence intensity was found to be more sensitive to vegetation density than the time-averaged velocity. The developing length increased with the spacing between plants. The snapshots of the bending vegetation under instantaneous velocity and vorticity revealed that flexible vegetation responded to the effects of eddies in the shear layer by swaying periodically. The first two rows of vegetation suffered stronger approaching flow and were prone to more streamlined postures. In addition, the origin of tip vortices was investigated via the distribution of vorticity. The results reveal the variation of flow properties with bending submerged vegetation and provide useful reference for optimization of restoration projects.

Vacuum Thermoforming for Packaging Flexible Electronics and Sensors in E-Textiles

Packaging of flexible electronics is essential for e-textile applications to reduce degradation of the performance caused by mechanical stress, environmental effects and to have increased durability. Conformal coatings for packaging have the advantage of reducing rigidity and can be seamlessly integrated into fabrics. Vacuum forming is a technique for packaging electronic devices with thermoplastic films of various thicknesses providing uniform coating. Polyurethane is a widely used thermoplastic material in e-textile and can be easily processed by vacuum forming for packaging. In this paper, a detailed explanation of the working of Formech 450DT vacuum former is discussed for packaging small electronic chip for e-textile application with thermoplastic polyurethane (TPU). Two types of flexible circuits were packaged; a Carbon monoxide gas sensor and a series of resistors on flexible PCB. The packaged CO flexible sensor and series resistors endured 5.3 times and 1.7 times respectively, more bending cycles than unpackaged flexible electronic filament samples. For the washing cycles, the packaged flexible strips with CO sensor and series resistors endured 1.5 times.

Advanced Electrode Coatings Based on Poly-N-Phenylanthranilic Acid Composites with Reduced Graphene Oxide for Supercapacitors.

The electrochemical behavior of new electrode materials based on poly-N-phenylanthranilic acid (P-N-PAA) composites with reduced graphene oxide (RGO) was studied for the first time. Two methods of obtaining RGO/P-N-PAA composites were suggested. Hybrid materials were synthesized via in situ oxidative polymerization of N-phenylanthranilic acid (N-PAA) in the presence of graphene oxide (GO) (RGO/P-N-PAA-1), as well as from a P-N-PAA solution in DMF containing GO (RGO/P-N-PAA-2). GO post-reduction in the RGO/P-N-PAA composites was carried out under IR heating. Hybrid electrodes are electroactive layers of RGO/P-N-PAA composites stable suspensions in formic acid (FA) deposited on the glassy carbon (GC) and anodized graphite foil (AGF) surfaces. The roughened surface of the AGF flexible strips provides good adhesion of the electroactive coatings. Specific electrochemical capacitances of AGF-based electrodes depend on the method for the production of electroactive coatings and reach 268, 184, 111 F∙g-1 (RGO/P-N-PAA-1) and 407, 321, 255 F∙g-1 (RGO/P-N-PAA-2.1) at 0.5, 1.5, 3.0 mA·cm-2 in an aprotic electrolyte. Specific weight capacitance values of IR-heated composite coatings decrease as compared to capacitance values of primer coatings and amount to 216, 145, 78 F∙g-1 (RGO/P-N-PAA-1IR) and 377, 291, 200 F∙g-1 (RGO/P-N-PAA-2.1IR). With a decrease in the weight of the applied coating, the specific electrochemical capacitance of the electrodes increases to 752, 524, 329 F∙g-1 (AGF/RGO/P-N-PAA-2.1) and 691, 455, 255 F∙g-1 (AGF/RGO/P-N-PAA-1IR).