Oxygen detection using UV-activated electrospun poly(ethylene oxide) fibers encapsulated with TiO2 nanoparticles

Mihindukulasuriya, Suramya D. F.; Lim, Loong‐Tak

doi:10.1007/s10853-013-7343-4

Cited by 34 publications

(15 citation statements)

References 20 publications

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“…The sensor, in the form of 70 µm thick film, was produced by extrusion and changed from dark blue to grey when exposed to UV light. Similar sensors have been reported with variations of sensor components: sacrificial donors (glycerol, DL-threitol, tartaric acid, triethanolamine), photocatalyst (micro- or nanoparticulated TiO 2 ), supporting polymer (zein, cellulose, LDPE), dye (methylene blue, thionine) [8,9,10,11,12,13,14,15,16]. A scheme of the functioning process of the sensor is described in Section 3.2.…”

Section: Introductionsupporting

confidence: 62%

“…All the formulations tested in the optimization of the sensor turned to the original blue colour in less than 1 h, as can be seen in Figure 4, confirming their reversibility. Earlier reports on colour recovery of MB-based sensors showed slower [7,8,11] or similar recovery times [9,14,15], although in all cases the sensing element were directly exposed to air and not as part of a fully developed packaging structure. After verifying that the sensors worked, the minimum amount of oxygen present capable of producing the white to blue change was assessed.…”

Section: Resultsmentioning

confidence: 99%

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Chromatic Sensor to Determine Oxygen Presence for Applications in Intelligent Packaging

López‐Carballo

Muriel-Galet

Hernández‐Muñoz

et al. 2019

Sensors

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A chromatic sensor has been designed for the detection of oxygen in package headspace. The sensor is based on the redox change of methylene blue (MB) to its leuco form. Its formulation includes the pigment, glycerol, as a sacrificial electron donor, TiO2, as a photocatalyst and ethylene-vinyl alcohol copolymer (EVOH), as a structural polymer matrix. The final sensor design that allows its manufacture by conventional printing and laminating technologies consists of the sensing polymer matrix (MB-EVOH) sandwiched in a suitable transparent multilayer structure. The outer layers protect the sensor from the external atmosphere and allow visualization of the colour. The inner layer is sufficiently opaque to facilitate sensor reading from the outside, is thick enough to avoid direct contact with food (functional barrier), and is oxygen-permeable to expose the sensing material to the internal package atmosphere. In the absence of oxygen, the sensor becomes white by irradiation with halogen lamps in less than 60 s. All components are substances permitted for food contact except the pigment, but specific migration analysis showed no trace of migration thanks to the functional barrier included in the design.

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Section: Introductionsupporting

confidence: 62%

Section: Resultsmentioning

confidence: 99%

Chromatic Sensor to Determine Oxygen Presence for Applications in Intelligent Packaging

López‐Carballo

Muriel-Galet

Hernández‐Muñoz

et al. 2019

Sensors

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“…Upon exposure to UV-B light, indicator gets bleached and photoreduction of dye takes place by SnO 2 nanoparticles. Another study done by Mihindukulasuriya and Lim ( 2013 ) generated UV based activated O 2 indicator membrane through electrospinning method. Encapsulating of the active components viz .…”

Section: O 2 Sensorsmentioning

confidence: 99%

Nanotechnology: An Untapped Resource for Food Packaging

Dhiman²,

et al. 2017

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Food commodities are packaged and hygienically transported to protect and preserve them from any un-acceptable alteration in quality, before reaching the end-consumer. Food packaging continues to evolve along-with the innovations in material science and technology, as well as in light of consumer's demand. Presently, the modern consumers of competitive economies demands for food with natural quality, assured safety, minimal processing, extended shelf-life and ready-to-eat concept. Innovative packaging systems, not only ascertains transit preservation and effective distribution, but also facilitates communication at the consumer levels. The technological advances in the domain of food packaging in twenty-first century are mainly chaired by nanotechnology, the science of nano-materials. Nanotechnology manipulates and creates nanometer scale materials, of commercial and scientific relevance. Introduction of nanotechnology in food packaging sector has significantly addressed the food quality, safety and stability concerns. Besides, nanotechnology based packaging intimate's consumers about the real time quality of food product. Additionally, nanotechnology has been explored for controlled release of preservatives/antimicrobials, extending the product shelf life within the package. The promising reports for nanotechnology interventions in food packaging have established this as an independent priority research area. Nanoparticles based food packages offer improved barrier and mechanical properties, along with food preservation and have gained welcoming response from market and end users. In contrary, recent advances and up-liftment in this area have raised various ethical, environmental and safety concerns. Policies and regulation regarding nanoparticles incorporation in food packaging are being reviewed. This review presents the existing knowledge, recent advances, concerns and future applications of nanotechnology in food packaging sector.

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“…Such oxygen indicators have received great attention especially in food packaging because oxygen is closely related to the management of food quality and safety [3]. In particular, UV-activated colorimetric oxygen indicators have the significant advantages of in-pack activation and irreversibility [4,5]. In addition, they proved to be stable for over 1 year in the dark under otherwise ambient conditions and thus have a long shelf-life under ambient conditions in marked contrast to other conventional oxygen indicators (e.g., Ageless Eye ® ) to require storage under anaerobic conditions [6].…”

Section: Introductionmentioning

confidence: 99%

Self-adhesive graphene oxide-wrapped TiO2 nanoparticles for UV-activated colorimetric oxygen detection

Son

Lee

et al. 2015

Sensors and Actuators B: Chemical

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Oxygen detection using UV-activated electrospun poly(ethylene oxide) fibers encapsulated with TiO2 nanoparticles

Cited by 34 publications

References 20 publications

Chromatic Sensor to Determine Oxygen Presence for Applications in Intelligent Packaging

Chromatic Sensor to Determine Oxygen Presence for Applications in Intelligent Packaging

Nanotechnology: An Untapped Resource for Food Packaging

Self-adhesive graphene oxide-wrapped TiO2 nanoparticles for UV-activated colorimetric oxygen detection

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