Natural Antioxidants in Polymer Technology

A special issue of Antioxidants (ISSN 2076-3921). This special issue belongs to the section "Natural and Synthetic Antioxidants".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 2780

Special Issue Editor

Special Issue Information

Dear Colleagues

The journal Antioxidants is preparing a Special Issue entitled “Natural antioxidants in polymer technology”. Following the current pro-ecological trends and law regulations, research works associated with using natural raw materials in polymer technology are becoming more and more advanced. Formerly, they were mainly focused on the incorporation of natural materials as reinforcement into natural fiber composites. However, researchers are more often trying to exploit the additional properties of natural materials related, e.g., to their antioxidant activity. These works are often inspired by other fields of science, such as biology, botany, or food chemistry. Therefore, among the investigated natural antioxidants for polymers can be found carotenoids, flavonoids, or other natural phenolics. Nevertheless, considering the multitude and diversity of natural antioxidants, as well as types of industrially applied polymers, the richness of potential innovations and future developments seems hardly limited. Having in mind the environmental aspects, it is essential to investigate the use of natural antioxidants, which in future could replace their synthetic analogs and reduce the environmental impact of polymeric materials. The Editors are pleased to launch this Special Issue and invite researchers to contribute their original research papers and reviews on natural antioxidants' applications as auspicious additives in polymer technology.

Topics include the following issues related to the use of natural antioxidants in polymer technology:

  • application of natural extracts as antioxidants for polymer materials;
  • application of natural raw materials as fillers with antioxidant activity;
  • modifications of fillers aimed at enhancement of their antioxidant activity;
  • oxidative degradation of polymer materials;
  • accelerated aging of polymer materials;
  • mechanism of polymer oxidation inhibition by natural antioxidants; and others.

Dr. Aleksander Hejna
Guest Editor

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Antioxidants is an international peer-reviewed open access monthly journal published by MDPI.

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Keywords

  • antioxidants
  • polymers
  • polymer composites
  • polymer blends
  • natural fillers
  • filler modification
  • natural extracts
  • oxidative degradation
  • accelerated aging

Published Papers (1 paper)

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Research

17 pages, 2771 KiB  
Article
Stabilization of PE with Pomegranate Extract: Contradictions and Possible Mechanisms
by Dóra Tátraaljai, Yun Tang, Emese Pregi, Erika Vági, Viola Horváth and Béla Pukánszky
Antioxidants 2022, 11(2), 418; https://doi.org/10.3390/antiox11020418 - 18 Feb 2022
Cited by 5 | Viewed by 2021
Abstract
Dry pomegranate peel was extracted with acetone and the extract was added to a Phillips type polyethylene. The concentration of the extract was changed from 0 to 1000 ppm in six steps and stabilization efficiency was checked by the multiple extrusion of the [...] Read more.
Dry pomegranate peel was extracted with acetone and the extract was added to a Phillips type polyethylene. The concentration of the extract was changed from 0 to 1000 ppm in six steps and stabilization efficiency was checked by the multiple extrusion of the polymer followed by the characterization of chemical structure, processing, and residual stability. The results confirmed the excellent processing stabilization efficiency of the extract, but also the poor long-term stability of PE containing it in accordance with previously published results. The extract is amorphous and its solubility is relatively large in the polymer; thus, these factors cannot be the reason for the poor stabilization efficiency in an oxygen-rich environment. Chemical factors like the self-interaction of the polyphenol molecules, the stability of the radicals forming after hydrogen abstraction, and the lack of hydrogens with the necessary reactivity must be considered during the evaluation of the efficiency of the extract. These factors as well as the insufficient number of active hydrogens hinder the reaction of the additive molecules with oxygen-centered radicals, thus leading to inferior long-term stability. The extract can be used for the processing stabilization of polymers, but for applications requiring long-term stability, it must be combined with other natural antioxidants like flavonoids or Vitamin E. Full article
(This article belongs to the Special Issue Natural Antioxidants in Polymer Technology)
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