Freestanding flexible polypyrrole nanotube membrane for ammonia sensor

Li, Xiujuan; Cai, Ziqing; Fang, Dong; Chang, Wen-Shin; Zhang, Ruifang; Lü, Xingjie; Li, Yuguang; Xu, Weilin

doi:10.1049/mnl.2017.0319

Cited by 4 publications

(7 citation statements)

References 27 publications

(33 reference statements)

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“…Chemical sensors are commonly used for the detection of NH 3 [ 33 , 87 , 89 , 92 , 211 , 212 , 213 , 214 , 215 , 216 , 217 , 218 ], volatile organic compounds [ 31 , 106 , 219 , 220 , 221 ], variation in pH values [ 81 , 109 , 222 ] and others [ 223 , 224 , 225 , 226 , 227 , 228 ] (see Table 4 ).…”

Section: Application Of Ppy Nanomaterialsmentioning

confidence: 99%

Polypyrrole Nanomaterials: Structure, Preparation and Application

et al. 2022

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In the past decade, nanostructured polypyrrole (PPy) has been widely studied because of its many specific properties, which have obvious advantages over bulk-structured PPy. This review outlines the main structures, preparation methods, physicochemical properties, potential applications, and future prospects of PPy nanomaterials. The preparation approaches include the soft micellar template method, hard physical template method and templateless method. Due to their excellent electrical conductivity, biocompatibility, environmental stability and reversible redox properties, PPy nanomaterials have potential applications in the fields of energy storage, biomedicine, sensors, adsorption and impurity removal, electromagnetic shielding, and corrosion resistant. Finally, the current difficulties and future opportunities in this research area are discussed.

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Section: Application Of Ppy Nanomaterialsmentioning

confidence: 99%

Polypyrrole Nanomaterials: Structure, Preparation and Application

et al. 2022

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“…The properties that make ICPs interesting are electrical conductivity, low weight, processability, corrosion and chemical resistance, biocompatibility, and low cost . Thanks to these features, conductive polymers have found applications in various fields, such as light emitting diodes, solar cells, electronic paper, sensors, tissue engineering, drug delivery, electrochromic devices, and batteries . The most important ICPs are polypyrrole (PPy), polyaniline (PANI), polythiophene (PTh), and their derivatives.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of a novel polyurethane/polypyrrole‐p‐toluenesulfonate (PU/PPy‐pTS) electroactive nanofibrous bending actuator

Ebadi

Semnani

Fashandi

et al. 2019

Polymers for Advanced Techs

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Electroactive actuators based on conductive polymers currently have attracted a great deal of attention. In this study, a nanofibrous structure of polypyrrole (PPy) was used to fabricate an electroactive bending actuator. For this purpose, polyurethane/PPy (PU/PPy) nanofibrous bending actuator was fabricated through the combined use of electrospinning and in-situ chemical polymerization. The response surface methodology (RSM) was considered to find the optimal electrospinning conditions for producing PU nanofibers with the minimum diameter. The in-situ chemical polymerization method was then used to prepare a conductive layer of PPy on the surface of optimum electrospun nanofibers with p-toluenesulfonate (pTS) as the dopant. The coated nanofibers were used in the fabrication of PU/PPy-pTS nanofibrous bending actuator. The morphology and electrical, thermal, electrochemical, and electrochemomechanical properties of the fabricated actuator were investigated. By using optimum conditions of electrospinning, PU nanofibers were obtained with a diameter of 221 nm. The results showed that the produced PU/PPy-pTS nanofibers enjoy good thermal stability and have an electrical conductivity of about 276.34 S/cm. The obtained cyclic voltammetric and dynamo-voltammetric responses showed that the dominant mechanism of actuation in the fabricated PU/PPy-pTS nanofibrous actuator is the exchange of perchlorate anions with a partial exchange of lithium cations in 1M lithium perchlorate electrolyte solution. The fabricated actuator was capable of undergoing 141°r eversible angular displacement during a potential cycle. The results demonstrated that, given high porosity, large specific surface area, flexibility, and desirable electrical properties, PU/PPy nanofibrous electroactive actuator provides a lot of potential for developing artificial muscle applications.

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“…[157,158] Li et al demonstrated an NH 3 sensor using a freestanding PPY/ Na 5 V 12 O 32 fibers composite where they first synthesized Na 5 V 12 O 32 upon which PPY was polymerized. [158] Na 5 V 12 O 32 was prepared by mixing NH 4 VO 3 and NaCl to a molar ratio of 1:6 in deionized (DI) water and transferred to a stainless steel autoclave. Then a Ti foil was inserted and the hydrothermal reaction was carried out for one hour at 150 °C and naturally cooled to room temperature.…”

Section: Polypyrrole-based Ammonia Sensorsmentioning

confidence: 99%

Conducting Polymer Based Ammonia and Hydrogen Sulfide Chemical Sensors and Their Suitability for Detecting Food Spoilage

Preethichandra

Gholami

Izake

et al. 2022

Adv Materials Technologies

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health problems such as food poisoning. On the other hand, if non-spoiled food is thrown away as it passes the prespecified expiry date/time, then it is a waste of a valuable food resource. Annual food wastage accounts for one-third of the world's food production and in response to this problem, the Food and Agriculture Organization (FAO) of the United Nations has set one of the sustainable development goals (SDGs) to address it. SDG 12.3 has set the target of halving per capita global food waste at the retail and consumer levels and reducing food loss along both production and supply chains (including post-harvest losses) by 2030. [2] Therefore, a demand for novel food spoilage detection sensors for real-time monitoring of food quality is obvious. Food packaging processes are mainly performed at atmospheric conditions where air-carrying microorganisms may remain inside the sealed food packages. This provides a suitable environment for microorganisms to thrive within the package due to this air capture. Some types of microorganisms, such as Brochothrix thermosphacta, Carnobacterium spp., Lactobacillus spp., Lactococcus spp., Leuconostoc spp., Pediococcus spp., Stretococcus spp., Kurthia zopfii, and Weisella spp, [3] cause disintegration of the food and produce various gasses such as hydrogen sulfide (H 2 S), carbon dioxide (CO 2 ), ammonia (NH 3 ), methane (CH 4 ), and other volatile organic compounds (VOCs). [4][5][6][7][8] The CO 2 level in atmospheric air is around 415 ppm and therefore detecting a variation of CO 2 concentration inside a food package at the very early stages of food spoilage is quite challenging. However, there are other types of food packaging called modified atmospheric packaging (MAP), where the package is vacuum-sealed or filled with different gases such as nitrogen combined with an antimicrobial active gas, such as carbon dioxide, to provide a barrier against food spoilage and improve the shelf-lifetime of the product. [9] There are multiple methods which are proposed by various research groups either for detecting the food spoilage or monitoring the food quality at early stages. Various parameters such as O 2 /CO 2 /NH 3 /H 2 S/VOC concentrations, temperature, humidity, pH value, and any specific chemicals inside the food package can be detected using a wide range of measurement techniques. [9] Figure 1 illustrates the three most common food categories and the gases that are emitted by microorganisms Food security is critical for the sustainability of society. The spoilage of stocked food is an ongoing problem that causes significant losses to the global economy. Novel portable analytical platforms that provide timely information on the condition of food stock can support informed decisionmaking on the safety of food consumption as well as on maximization of food storage lifetime. Ammonia (NH 3 ) and hydrogen sulfide (H 2 S) are two of the major harmful gases that are produced due to bacteria activity during the food spoilage process. The timely detection of these gases in food stocks h...

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Freestanding flexible polypyrrole nanotube membrane for ammonia sensor

Cited by 4 publications

References 27 publications

Polypyrrole Nanomaterials: Structure, Preparation and Application

Polypyrrole Nanomaterials: Structure, Preparation and Application

Synthesis and characterization of a novel polyurethane/polypyrrole‐p‐toluenesulfonate (PU/PPy‐pTS) electroactive nanofibrous bending actuator

Conducting Polymer Based Ammonia and Hydrogen Sulfide Chemical Sensors and Their Suitability for Detecting Food Spoilage

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