Diglycidyl ether of bisphenol A/chitosan‐<i>graft</i>‐polyaniline composites with electromagnetic interference shielding properties: Synthesis, characterization, and curing kinetics

Aziz, Mohamed S. Abdel; Salama, H. S.; Saad, Gamal R.

doi:10.1002/pen.24933

Cited by 19 publications

(2 citation statements)

References 62 publications

(69 reference statements)

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“…Due to the film-forming properties of alginates, such as their hydrophilicity and biocompatibility, they are extensively used in the preparation of edible coatings [89,90]. However, alginates have also some drawbacks that have limited their usage in food preservation, such as low resistance to UV radiation, water barrier properties, and high sensitivity to microbial growth.…”

Section: Alginatementioning

confidence: 99%

Biodegradable Packaging Materials for Foods Preservation: Sources, Advantages, Limitations, and Future Perspectives

Panou¹,

Karabagias

2023

Coatings

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Biodegradable packaging materials generally comprise a solution to the environmental problem caused by the consecutive use of conventional packaging materials (petroleum-based materials) even though these have a high cost. The monomers resulting from the slow degradation of petroleum-based materials contribute to the pollution of the environment. Biodegradable packaging materials distinguished by high biodegradability and biocompatibility can successfully replace the aforementioned packaging materials and thus solve the environmental problems caused by their use or deposition. Although several of the biodegradable packaging materials present defective properties, mainly mechanical and barrier properties, these are reduced or even eliminated by the addition of various improving additives and by blending them with other biopolymers. Various natural preservatives such as essential oils or other phytochemical extracts can also be incorporated into the biopolymer network to increase its efficacy. This treatment is particularly beneficial since it contributes to the increasing of the shelf life and storability of packaged foods such as fruits, vegetables, dairy products, meat and its products, poultry, and fish. For all the above reasons, the preferences of consumers and the critical thinking/decisions of the food product manufacturing industries in favor of the potential use of biodegradable packaging materials in foods are increasing more and more. In this context, the present review article addresses the most recently used biodegradable packaging materials for foods preservation by presenting their sources, advantages, limitations, and future perspectives.

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Section: Alginatementioning

confidence: 99%

Biodegradable Packaging Materials for Foods Preservation: Sources, Advantages, Limitations, and Future Perspectives

Panou¹,

Karabagias

2023

Coatings

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“…Conducting polymers are widely used in electronics, batteries, supercapacitors, and electromagnetic interference (EMI) shields. [ 1–4 ] Polyaniline (PANI) and polypyrrole (PPy) are extensively used conducting polymers as they are easily prepared, have excellent electrical properties and chemical as well as environmental stability. [ 5–7 ] Contrastingly, the insoluble nature and lack of processability are the demerits of PANI and PPy.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, conductivity, and gas‐sensing performance of copolymer nanocomposites based on copper alumina and poly(aniline‐co‐pyrrole)

Sankar

Ramesan

2022

Polymer Engineering & Sci

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A series of copolymer nanocomposites based on poly(aniline-co-pyrrole) (PANI-co-PPy) with different contents of copper alumina (Cu-Al 2 O 3 ) nanoparticles were synthesized by benign in situ chemical oxidation polymerization. The structural, thermal transition, and morphological interpretations were carried out by Fourier-transform infrared spectroscopy (FTIR), x-ray diffraction (XRD), differential scanning calorimetry (DSC), and high-resolution transmission electron microscope (HR-TEM). The electrical properties such as alternating current (AC) conductivity and dielectric measurements were performed at room temperature to verify their application in developing new electronic devices. The presence of nanoparticles in the copolymer and the synergistic interaction in the copolymer matrix was confirmed by FTIR and XRD. HR-TEM indicates the nanosized uniform dispersion of nanofiller in the copolymer matrix. DSC revealed a reduction in the flexibility of polymer with an increase in glass transition temperature of copolymer composites. AC conductivity measurement manifested an increased hopping of charge carriers in nanocomposites when compared with pristine PANI-co-PPy. Dielectric properties were maximum for copolymer with 5 wt% Cu-Al 2 O 3 . Excellent gas sensing traits were observed for copolymer nanocomposites due to the electron transfers existing between PANI-co-PPy and ammonia gas. The maximum gassensing properties and electrical conductivity were observed for 5 wt% copolymer composites. The magnificent material properties make PANI-co-PPy/Cu-Al 2 O 3 nanocomposites, a promising contender for developing nano-electronic devices.

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High performance optical and electrical properties of zinc oxide reinforced poly(diphenylamine) nanocomposites for optoelectronic applications

Furhan

Ramesan

2022

Polymer Engineering & Sci

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Polymer nanocomposites with good optical, crystalline, morphological, thermal, dielectric, and electrical properties were synthesized using poly(diphenylamine) (PDPA) and zinc oxide (ZnO) nanoparticles. The redshift in the UV absorption edges of composites indicates that ZnO nanoparticles have been successfully incorporated into the PDPA matrix. The lowest optical bandgap energy and maximum refractive indices were observed in 7 wt% loadings. The narrowing of the avearge chain spacing detected by X-ray diffraction (XRD) proved that ZnO had an impact on the structure of PDPA. Scanning electron microscopy (SEM) images show homogeneous dispersion of spherically shaped ZnO nanoparticles at lower filler loadings. The glass transition temperature of the nanocomposites was greatly enhanced with the addition of nanoparticles analyzed by differential scanning calorimetry. The electrical and dielectric properties improved with temperature and nanoparticle loadings up to 7 wt%. The analysis of impedance spectra and the decreasing radius of semi-circular arcs in the Nyquist plot manifests the existence of temperature-dependent conductivity and relaxation phenomenon. The experimental values of DC conductivities were correlated with different theoretical conductivity models and the McCullough model was found to be the most promising one to explain the increased DC conductivity of the PDPA/ZnO nanocomposites.

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Diglycidyl ether of bisphenol A/chitosan‐graft‐polyaniline composites with electromagnetic interference shielding properties: Synthesis, characterization, and curing kinetics

Cited by 19 publications

References 62 publications

Biodegradable Packaging Materials for Foods Preservation: Sources, Advantages, Limitations, and Future Perspectives

Biodegradable Packaging Materials for Foods Preservation: Sources, Advantages, Limitations, and Future Perspectives

Synthesis, characterization, conductivity, and gas‐sensing performance of copolymer nanocomposites based on copper alumina and poly(aniline‐co‐pyrrole)

High performance optical and electrical properties of zinc oxide reinforced poly(diphenylamine) nanocomposites for optoelectronic applications

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