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Trends in Functionalization of Natural Polymers by Ionizing and Non-ionizing...
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Trends in Functionalization of Natural Polymers by Ionizing and Non-ionizing Radiation Processing

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Polymeric Materials".

Deadline for manuscript submissions: closed (20 October 2023) | Viewed by 2110

Special Issue Editors

Dr. Monica Nemtanu

E-Mail Website1 Website2
Guest Editor
National Institute for Laser, Plasma and Radiation Physics, 409 Atomiştilor St., P.O. Box MG-36, 077125 Bucharest-Măgurele, Romania
Interests: natural polymeric materials; polysaccharides; radiation and cold plasma-based processing of (bio)materials; techno-functional properties; rheology; spectroscopy and spectro(photo)colorimetry; modeling of "treatment-effect" relationships, including the identification of evolution patterns; optimization
Prof. Dr. Terezinha de Jesus Andreoli Pinto

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Guest Editor
Department of Pharmacy, Faculty of Pharmaceutical Sciences, University of São Paulo, Av. Prof. Lineu Prestes, 05508-000 São Paulo, Brazil
Interests: medicinal and pharmacetical chemistry; biomaterials; pharmaceutical development; microbiology; environment
Dr. Kappat Valiyapeediyekkal Sunooj

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Guest Editor
Department of Food Science and Technology, School of Life Sciences, Pondicherry University, Puducherry 605014, India
Interests: food material science; biopolymers; cold plasma; food irradiation
Dr. Mirela Braşoveanu

E-Mail Website
Guest Editor
Electron Accelerators Laboratory, National Institute for Laser, Plasma and Radiation Physics, 409 Atomiştilor St., P.O. Box MG-36, 077125 Magurele, Romania
Interests: organic materials; biopolymers; interaction radiation-matter; spectroscopy; heat transfer in irradiated materials; “treatment-effect” modeling with evolution pattern identification

Special Issue Information

Dear Colleagues,

Materials based on natural polymers are increasingly desired and promoted in both food and non-food applications. In this way, there is a continuous need to functionalize and upgrade the processing of bio-based materials by using emerging and non-polluting techniques. Recent trends of (bio)polymer modification explore various approaches of using radiation-based techniques for both single and dual modification in order to improve the technological and functional properties of natural polymer materials (i.e., starch, cellulose, pectins, alginates, chitosan, gums). The methods based on ionizing radiation, such as gamma rays and electron beams, or non-ionizing radiation, such as radio-waves, microwaves, ultraviolet rays, and even cold plasma for processing bio-based materials, are environmentally friendly and quick, involving no use of pollutants, no production of waste, and no penetration of toxic substances into the treated materials.

This Special Issue on Trends in Functionalization of Natural Polymers by Ionizing and Non-Ionizing Radiation Processing aims to highlight recent progress in the development of ionizing and non-ionizing radiation uses in modern and non-conventional methods for bio-based material processing. Thus, this Special Issue invites contributions (full papers, communications, and reviews) related to natural polymeric materials processing by radiation-based methods and their characterization, properties, and applications.

Dr. Monica R. Nemţanu
Prof. Dr. Terezinha de Jesus Andreoli Pinto
Dr. Kappat Valiyapeediyekkal Sunooj
Dr. Mirela Braşoveanu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

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. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • interaction of radiation with polymers
  • single and dual modifications of biopolymers
  • cold plasma modification of biopolymers
  • degradation
  • cross-linking
  • grafting
  • novel modified polymeric biomolecules
  • properties and mechanisms
  • modelling
  • optimization
  • new applications

Published Papers (2 papers)

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Research

18 pages, 5393 KiB  
Article
Poly(Acrylic Acid)-Sodium Alginate Superabsorbent Hydrogels Synthesized by Electron Beam Irradiation Part I: Impact of Initiator Concentration and Irradiation Dose on Structure, Network Parameters and Swelling Properties
by Gabriela Craciun, Ion Cosmin Calina, Maria Demeter, Anca Scarisoreanu, Marius Dumitru and Elena Manaila
Materials 2023, 16(13), 4552; https://doi.org/10.3390/ma16134552 - 23 Jun 2023
Viewed by 1197
Abstract
In the present paper, hydrogels based on acrylic acid (20%), sodium alginate (0.5%) and poly(ethylene oxide) (0.1%) were obtained by electron beam irradiation at room temperature with doses between 5 and 20 kGy, using potassium persulfate in concentrations up to 0.3% as a [...] Read more.
In the present paper, hydrogels based on acrylic acid (20%), sodium alginate (0.5%) and poly(ethylene oxide) (0.1%) were obtained by electron beam irradiation at room temperature with doses between 5 and 20 kGy, using potassium persulfate in concentrations up to 0.3% as a reaction initiator. The influence of initiator concentration and irradiation dose on hydrogel network parameters, swelling and deswelling behavior, gelation and degradation points, structure and morphology were investigated. Cross-link density increased with the irradiation dose and initiator addition, except at 20 kGy. The gel fraction was over 87.0% in all cases. Swelling experiments in distilled water showed swelling degrees of 40,000% at an irradiation dose of 5 kGy when a concentration of 0.1% initiator was added. A relationship between the swelling degree and irradiation dose, cross-linking degree (that increases from 0.044 × 102 to 0.995 × 102 mol/cm3) and mesh size (that decreases from about 220 nm to 26 nm) was observed. The addition of only 0.1% of PP led to the obtaining of hydrogels with a swelling degree of 42,954% (about 430 g/g) at an irradiation dose of 5 kGy and of 7206% (about 62 g/g) at 20 kGy, which are higher percentages than those obtained in the same irradiation conditions but without PP. Full article
(This article belongs to the Special Issue Trends in Functionalization of Natural Polymers by Ionizing and Non-ionizing Radiation Processing)
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20 pages, 3400 KiB  
Article
Synthesis of Natural-Inspired Materials by Irradiation: Data Mining from the Perspective of Their Functional Properties in Wastewater Treatment
by Mirela Braşoveanu, Hassan Sabbaghi and Monica R. Nemţanu
Materials 2023, 16(7), 2686; https://doi.org/10.3390/ma16072686 - 28 Mar 2023
Cited by 2 | Viewed by 1187
Abstract
The present study is focused on assessing the interrelation of variables involved in the synthesis of natural-inspired copolymers by electron beam grafting while taking the functionality of the resulting materials into account. In this respect, copolymers of starch-graft-polyacrylamide (St-g-PAM) were synthesized [...] Read more.
The present study is focused on assessing the interrelation of variables involved in the synthesis of natural-inspired copolymers by electron beam grafting while taking the functionality of the resulting materials into account. In this respect, copolymers of starch-graft-polyacrylamide (St-g-PAM) were synthesized by irradiation, and their flocculation efficiency regarding the total suspended solids (TSS), chemical oxygen demand (COD), and fatty matters (FM) was tested in coagulation–flocculation experiments at laboratory scale on wastewater from the oil industry. Data mining involved approaches related to the association (correlation and dimensionality reduction with principal component analysis (PCA)), clustering by agglomerative hierarchical clustering (AHC), classifying by classification and regression tree (CART), and prediction (decision tree prediction, multiple linear regression (MLR), and principal component regression (PCR)) of treatments applied with the variation of the monomer concentration, irradiation dose, and dose rate. The relationship mining proved that the level of COD was significantly affected by the irradiation dose and monomer concentration, and FM was mainly affected by the dose rate (significance level = 0.05). TSS showed the highest negative correlation with the tested variables. Moreover, the consequences of MLR demonstrated an acceptable accuracy (mean absolute percentage error < 5%) for COD and FM; meanwhile, linear modeling together with the consequences of PCA in the structure of PCR could help to simplify and improve the prediction accuracy of equations. Full article
(This article belongs to the Special Issue Trends in Functionalization of Natural Polymers by Ionizing and Non-ionizing Radiation Processing)
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