Preparation of pH-Indicative and Flame-Retardant Nanocomposite Films for Smart Packaging Applications

Abu-Thabit, Nedal Y.; Hakeem, Abbas Saeed; Mezghani, Khaled; Ratemi, Elaref; Elzagheid, Mohamed I.; Umar, Yunusa; Primartomo, Adhi; Al‐Batty, Sirhan; Azad, Abdul Kalam; Anazi, Sami Al; Ahmad, Ayman

doi:10.3390/s20195462

Cited by 16 publications

(3 citation statements)

References 94 publications

(139 reference statements)

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“…For example, soybean straw nanocellulose/SPI film increased the TS by 47.54% (Martelli‐Tosi. et al., 2018) as ionic crosslinking hydrogen bonds are low in energy and can be removed, although, compared with covalent bonds, are flexible and do not make the film brittle (Abu‐Thabit et al., 2012, 2020). With further increases in indicator concentration, TS was reduced to 0.83 MPa at a 10 ml/100 ml film emulsion concentration.…”

Section: Resultsmentioning

confidence: 99%

Preparation of pH‐indicator films based on soy protein isolate/bromothymol blue and methyl red for monitoring fresh‐cut apple freshness

Ran

Wang

et al. 2021

Journal of Food Science

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Intelligent pH-indicator films based on soy protein isolate (SPI) were prepared using pH-sensitive dyes (bromothymol blue and methyl red). The addition of mixed indicators imparts pH-indicator films with an appreciable microstructure, acceptable water resistance, and favorable optical properties. The incorporation of the mixed indicators did not lead to significant improvement in the mechanical properties of films due to weak ionic cross-linking by hydrogen bonding between the SPI macromolecules and low-molecularweight indicators. Fourier-transform infrared spectroscopy indicated hydrogen bond-mediated intermolecular interactions, and scanning electron microscopy showed that BB/MR were well dispersed in the SPI film. The indicator addition hindered the sorption and passage of water molecules. The water vapor permeability, moisture sorption, moisture content, and total soluble matter were 4.32 to 6.12 ×10 -12 g⋅cm/cm 2 ⋅s⋅Pa, 36.70% to 73.33%, 25.28% to 44.11%, and 8.21% to 25.56%, respectively. Also, the addition of indicators reduced UV light transmittance with minimal effect on the transparency of the film. The presence of indicators enhanced the pH sensitivity, seen as a visible color reaction at different pHs (total color difference, ΔE > 5). When the pH-indicator film containing 8 ml/100 ml final film emulsions was used to monitor the fresh-cut apple freshness, a green color for fresh status was observed, which turned blue after 60 h. Collectively, our findings suggested that indicator-containing SPI films have the potential for monitoring the freshness of fruits.Practical Application: pH-indicator films can help consumers to identify the freshness of packaged food by a change in the color of the packaging material, which is easily visible to the unaided eye without the need for opening the packaging. This protects consumers' interests.

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Section: Resultsmentioning

confidence: 99%

Preparation of pH‐indicator films based on soy protein isolate/bromothymol blue and methyl red for monitoring fresh‐cut apple freshness

Ran

Wang

et al. 2021

Journal of Food Science

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“…In food packaging, the term “nanoparticle” refers to a wide variety of materials including (but not limited to) carbon materials [ 138 , 139 ], metals [ 140 , 141 ], metal oxides [ 142 , 143 ], mixed metal oxides [ 144 ], and nanolayers [ 145 , 146 , 147 ]. These materials are used as nanocomposites with characteristic physical, chemical, and biological properties [ 89 , 148 , 149 ].…”

Section: Functional Materials For Edible Films and Coatingsmentioning

confidence: 99%

A Comprehensive Review of Biodegradable Polymer-Based Films and Coatings and Their Food Packaging Applications

2022

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Food sectors are facing issues as a result of food scarcity, which is exacerbated by rising populations and demand for food. Food is ordinarily wrapped and packaged using petroleum-based plastics such as polyethylene, polyvinyl chloride, and others. However, the excessive use of these polymers has environmental and health risks. As a result, much research is currently focused on the use of bio-based materials for food packaging. Biodegradable polymers that are compatible with food products are used to make edible packaging materials. These can be ingested with food and provide consumers with additional health benefits. Recent research has shifted its focus to multilayer coatings and films-based food packaging, which can provide a material with additional distinct features. The aim of this review article is to investigate the properties and applications of several bio-based polymers in food packaging. The several types of edible film and coating production technologies are also covered separately. Furthermore, the use of edible films and coatings in the food industry has been examined, and their advantages over traditional materials are also discussed.

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“…Although buffer solutions can be used to keep constant pH, sometimes pH can change in different steps of the process. In the literature, several pH sensor types are reported, including optical fibre, mass-sensitive, metal oxide, nano-constructed cantilever, ion-selective field-effect transistor (ISFET), capacitive, colourimetric, and conducting polymer-based pH sensors [24][25][26][27][28][29]. The most popular and widely used pH sensor is a glass electrode that was first reported more than a century ago by Max Cremer [30].…”

Section: Introductionmentioning

confidence: 99%

A Sensor for Electrochemical pH Monitoring Based on Laser-Induced Graphene Modified with Polyfolate

Žutautas,

Trusovas,

Sartanavičius

et al. 2023

Chemosensors

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A laser-induced graphene (LIG) modified with chitosan (Chit) and conducting polymer polyfolate (PFA) was used as a base to develop a flat and flexible pH sensor. LIGs were formed using two different irradiation wavelengths of 355 nm and 532 nm. Depending on the wavelengths, the obtained electrodes were named LIG355 and LIG532. Microscopic imaging revealed that the bare LIG electrode surface had rough structures after laser treatment giving hydrophilic properties, and that PFA forms fibre-like structures on Chit coated LIG. Electrochemical investigation with the redox probe demonstrated that diffusion is a limiting process at the bare and modified LIG electrodes. A capacitive behaviour was observed from electrochemical impedance spectra at bare electrodes, showing a rather rough interface at LIG355 but a microporous one at LIG532. The developed flat and flexible electrode was sensitive to pH in the region from 6.0 to 9.0. In the studied pH range, the sensitivity was 27.86 ± 0.81 for PFA/Chit/LIG355 and 30.32 ± 0.50 mV/pH for PFA/Chit/LIG532 with moderate stability for a period of more than two months.

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Preparation of pH-Indicative and Flame-Retardant Nanocomposite Films for Smart Packaging Applications

Cited by 16 publications

References 94 publications

Preparation of pH‐indicator films based on soy protein isolate/bromothymol blue and methyl red for monitoring fresh‐cut apple freshness

Preparation of pH‐indicator films based on soy protein isolate/bromothymol blue and methyl red for monitoring fresh‐cut apple freshness

A Comprehensive Review of Biodegradable Polymer-Based Films and Coatings and Their Food Packaging Applications

A Sensor for Electrochemical pH Monitoring Based on Laser-Induced Graphene Modified with Polyfolate

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