Research and Biostatistics for Nurses

Sudha, R

doi:10.5005/jp/books/13016

Cited by 4 publications

(6 citation statements)

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“…This is manifested by the shift of decomposition temperature of the main polymer blend from 350 • C (Figure 2A-pure hydrogel) to 370 • C. The percent weight loss also decreases with increasing MWCNT content, especially for the highest carbon loading ( Figure 2C). The higher resistance to heat in the presence of the MWCNT reinforced within the polyacrylamide/alginate network can be also related to weak chemical interactions between the MWCNT and the different reaction sites of both polymers [27,29]. For example, the latest study suggested that carboxyl groups present on the MWCNT surface can react with hydroxyl functionalities of alginate, resulting in hydrogen bridging [27].…”

Section: Structure and Thermal Stability: Effect Of Mwcnt Content On mentioning

confidence: 99%

“…Although hydrogels fabricated in this work demonstrated lower force resistance to elongation, the comparison with the referred literature can be only qualitative since the results strongly depend on the thickness and geometry of the sample [22], the size of mounting clamps, as well as on the quality of the clamp (e.g., clamps with a sharp, uneven edge cause the material to be cut through faster). Joddar and colleagues reported the MWCNT embedded in alginate hydrogel (without acrylamide) at a very low load content [29]. The resilience ranges from 103.5 kPa for the pure hydrogel, 79.5 kPa (1 mg mL −1 MWCNT), 62 (3 mg mL −1 MWCNT), and 18 kPa (5 mg mL −1 MWCNT), with the decrease of total strength and stretch modulus with increasing MWCNT content observed.…”

Section: Resilience-mechanical Analysismentioning

confidence: 99%

“…Hong et al [28] integrated single-walled CNTs in poly (dimethyl siloxane) and analyzed their electrical characteristics in various circuits, as well as under differing mechanical strain. Sudha et al [29] created an MWCNT-polyacrylamide hydrogel, exploring dehydration and rehydration properties, with a brief examination of their conductivities. Among other carbon allotropes, carbon nanotubes are particularly researched as they show several benefits when combined with various polymer electrolytes.…”

Section: Introductionmentioning

confidence: 99%

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Flexible Electrode Based on MWCNT Embedded in a Cross-Linked Acrylamide/Alginate Blend: Conductivity vs. Stretching

Thibodeau

Ignaszak

2020

Polymers

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A polyacrylamide-alginate hydrogel electrolyte, blended with Multi-Walled Carbon Nanotubes (MWCNT) as an electronically conductive fraction, allows for the creation of a flexible, durable, and resilient electrode. The MWCNT content is correlated with mechanical characteristics such as stretch modulus, tensile resistance, and electrical conductivity. The mechanical analysis demonstrates tensile strength that is comparable to similar hydrogels reported in the literature, with increasing strength for MWCNT-embedded hydrogels. The impedance spectroscopy reveals that the total resistance of electrodes decreases with increasing MWCNT content upon elongation and that bending and twisting do not obstruct their conductivity. The MWCNT-inserted hydrogels show mixed ionic and electronic conductivities, both within a range of 1-4 × 10 −2 S cm −1 in a steady state. In addition, the thermal stability of these materials increases with incrementing MWCNT content. This observation agrees with long-term charge-discharge cycling that shows enhanced electrochemical durability of the MWCNT-hydrogel hybrid when compared to pure hydrogel electrolyte. The hydrogel-carbon films demonstrate an increased interfacial double-layer current at a high MWCNT content (giving an area-specific capacitance of~30 mF cm −2 at 2.79 wt.% of MWCNT), which makes them promising candidates as printable and flexible electrodes for lightweight energy storage applications. The maximum content of MWCNT within the polymer electrolyte was estimated at 2.79 wt.%, giving a very elastic polymer electrode with good electrical characteristics.

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Section: Structure and Thermal Stability: Effect Of Mwcnt Content On mentioning

confidence: 99%

Section: Resilience-mechanical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Flexible Electrode Based on MWCNT Embedded in a Cross-Linked Acrylamide/Alginate Blend: Conductivity vs. Stretching

Thibodeau

Ignaszak

2020

Polymers

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“…First, for the PAM component, above the wavenumber 3000 cm −1 corresponds to the stretching vibration of the N−H group, near 1650 cm −1 is attributed to the stretching vibration of C� O, at 1450 cm −1 wavenumber is the in-plane shear vibration of the CH 2 group, and at 1420 cm −1 wavenumber is the stretching vibration of the primary amide CN; in addition, the absorption peak at 1120 cm −1 wavenumber originates from the in-plane oscillation of NH 2 . 15 The hydrogel with gelatin addition showed a more pronounced peak shape at 1580 cm −1 , mainly caused by the bending vibration of N−H and the stretching vibration of C−N in concert, and a small peak was added at 1220 cm −1 , attributed to the amide III band, which was the result of the combined effect of the wobbling vibration of the CH 2 group of the glycine backbone and proline side chain, the bending vibration of the NH bond, and the stretching vibration of the C−N bond. 16 The result may also be due to the interaction between the C-NH 2 in the PAM and the phenolic hydroxyl group on the PDA.…”

Section: Ft-ir Analysismentioning

confidence: 99%

Wearable and Flexible Hydrogels for Strain Sensing and Wound Electrical Stimulation

Zhang

Wang

et al. 2023

Ind. Eng. Chem. Res.

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Conductive hydrogels have attracted a great deal of interest in health testing and electrical stimulation therapy. To improve the inherent brittleness and stickiness of hydrogels, a multifunctional electronic skin mediated by dopamine-modified carbon nanotubes and gelatin was fabricated. In this work, a flexible, conductive, and biocompatible adhesive hydrogel was prepared directly without further processing by simply mixing dopamine-modified carbon nanotubes, gelatin, and acrylamide. Carbon nanotubes play a dominant role in the electromechanical and mechanical properties of the hydrogel. The polydopamine gives the hydrogel good and reproducible adhesion properties. At the same time, the hydrogels obtained have good sensing properties and can detect mechanically conducted signals of human motion. In addition, the hydrogels are able to act as conductive media to deliver electrical stimuli generated by poly(vinylidene fluoride-trifluoroethylene) piezoelectric membranes to accelerate wound healing. In conclusion, this work provides a feasible method to prepare hydrogel sensors with good biocompatibility, good mechanical properties, and good adhesion, which can be widely used in human motion detection, smart skin, and electrical stimulation therapy.

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“…Driving licenses are being distributed in electronic smart cards from the transport management office, Bagmati and there is a program of distributing electronic smart cards gradually from the other offices. According to Sudha & Sudha, (2017) it is quite common to hear reports of criminal activities amongst taxi operators in Nepal. In addition, most of the drivers are not qualified to drive in the urban area which is illegal, without proper registration, underage, etc.…”

Section: Introductionmentioning

confidence: 99%

Consumers’ Perception towards the Taxi Management in Kathmandu Valley: Awareness, Challenges, and Way-Forward

et al. 2021

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Taxi services are seen continuously growing throughout the globe. The service being able to cope with technological advancement has been benefitted to a greater extent. However, in Nepalese context taxi used in Kathmandu valley is still based on primitive technology and services still face several challenges. In this context, this research aims to examine consumers' perception of taxi management in Kathmandu valley. The study was carried out among 414 taxi users with the help of a structured questionnaire. The taxi users' awareness index is prepared to measure customers' awareness towards taxi management in Kathmandu valley. The data revealed that customers' awareness level regarding the taxi services in Kathmandu valley is moderate (43.5%) and still 21.8% of them are less aware. It is found that the majority (66.7%) have not faced any challenges while using taxi service and one-third (33.3%) have faced challenges - over price charge (93%), rude behaviors (89%), payment problem (64%), and communication problems are major ones. Such challenges are moderate and often occurred at night time and at office time. Respondents argued that taxi services can be managed by formulating proper rules and regulations by the government, online booking and payment systems, and the installation of GPS on taxis. These services would help to run the taxi service effectively in the valley.

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Research and Biostatistics for Nurses

Cited by 4 publications

References 0 publications

Flexible Electrode Based on MWCNT Embedded in a Cross-Linked Acrylamide/Alginate Blend: Conductivity vs. Stretching

Flexible Electrode Based on MWCNT Embedded in a Cross-Linked Acrylamide/Alginate Blend: Conductivity vs. Stretching

Wearable and Flexible Hydrogels for Strain Sensing and Wound Electrical Stimulation

Consumers’ Perception towards the Taxi Management in Kathmandu Valley: Awareness, Challenges, and Way-Forward

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