Special Issue "Advances in Natural Polymers: Extraction Methods and Applications"

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Applications".

Deadline for manuscript submissions: 25 October 2022 | Viewed by 2206

Special Issue Editors

Prof. Dr. Cornelia Vasile
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Guest Editor
Romanian Academy, “P.Poni” Institute of Macromolecular Chemistry, Physical Chemistry of Polymers Department, 41A Gr. Ghica Voda Alley, 700487 Iasi, Romania
Interests: polymer physical chemistry; responsive polymers; nanocoatings; radiation-assisted polymer modification; natural/degradable polymers; synthetic/natural polymer blends; composite and nanocomposites; polymer degradation; (bio)degradability; biocompatibility; wound dressing; controlled and targeting drug release; nanomaterials; polymer surface physical chemistry
Special Issues, Collections and Topics in MDPI journals
Dr. Gabriel Aguirre-Álvarez
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Guest Editor
Department of Food, Instituto de Ciencias Agropecuarias, Universidad Autónoma del Estado de Hidalgo, Av. Universidad Km 1, Rancho Universitario, C.P. 43600 Tulancingo, Hidalgo, Mexico
Interests: extraction methods of natural polymers; tissue engineering; films; enzymatic hydrolysis; antioxidant activity; biodisponibility; regenerative materials; bioactive peptides; skin; scaffolds for skin repair; wound healing; nutraceutical beverages; food supplement; hydration of the skin and anti-inflamatory properties
Dr. Xiao-Feng Sun
E-Mail Website
Guest Editor
School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi’an, China
Interests: natural polymers; polymer composites and nanocomposites
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Natural polymers normally occur in nature and can be obtained from a wide variety of sources including plants, animals, and microorganisms. They are classified mainly into three groups: polysaccharides (cellulose, pectin, dextran, pullulan, starch, chitin, alginate, chitosan, hyaluronic acid, xanthan, and guar gum), peptides (collagen, gelatin, casein and albumin) and polynucleotides (DNA and RNA). Natural polymers are gaining interest among the research community as an attractive ingredient for skin repair and regeneration of the skin, bone tissue engineering, water holding agent, greater cellular attachment and matrix deposition, mechanical stability, drug carriers in anticancer therapy, lack of toxicity, low cost, nanocarriers, antitumor activity, anti-inflammatory,  high compatibility with the extra cellular matrix, high biocompatibility, safety, antimicrobial activity, antioxidant activity, film formation, nutraceutical beverages, hydration of the skin, and food supplements.

This Special Issue welcomes submissions of original articles or reviews from an extensive range of expertise in the field of natural polymers with its wide variety of subject matter. The aim is to advance in the understanding of fundamental and technological aspects of extraction of natural products and their applications.

Prof. Dr. Cornelia Vasile
Dr. Gabriel Aguirre-Álvarez
Dr. Xiao-Feng Sun
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. Polymers 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 2400 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

  • natural polymers
  • collagen
  • gelatin
  • hyaluronic acid
  • starch
  • cellulose
  • pectin
  • dextran
  • pullulan
  • chitin
  • chitosan
  • alginate
  • guar gum
  • xanthan
  • casein
  • albumin

Published Papers (3 papers)

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Research

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Article
Green Synthesis of Silver Nanoparticles for Preparation of Gelatin Films with Antimicrobial Activity
Polymers 2022, 14(17), 3453; https://doi.org/10.3390/polym14173453 - 24 Aug 2022
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Abstract
Silver nanoparticles were successfully synthesized using Thuja orientalis aqueous extract and AgNO3 as a precursor. UV–Vis showed a distinct absorption peak at 424 nm attributed to silver nanoparticles due to their surface plasmon resonance. Atomic absorption analysis reflected an increase in the [...] Read more.
Silver nanoparticles were successfully synthesized using Thuja orientalis aqueous extract and AgNO3 as a precursor. UV–Vis showed a distinct absorption peak at 424 nm attributed to silver nanoparticles due to their surface plasmon resonance. Atomic absorption analysis reflected an increase in the concentration of nanoparticles in relation to the progress of the synthesis, obtaining a peak concentration value of 15.7 mg/L at 50 min. The FTIR spectra revealed the characteristic functional groups of phytomolecules involved in the silver–ion binding process, such as R–O–H (3335 cm−1) O=C–OH (2314 cm−1) and C—C=C (1450 cm−1). At 50 min, zeta potential showed the stability of the nanoparticles with the value of −21.73 mV. TEM micrographs revealed the formation of spherical nanoparticles with an average size of about 85.77 nm. Furthermore, films incorporated with nanoparticles exhibited a Tg from 66.42 °C to 73.71 °C and Tm at 103.31 °C. Films from the G22 formulation presented excellent antibacterial properties inhibiting the growth of Staphylococcus aureus. Thuja orientalis aqueous extract could be a low-cost, eco-friendly, and efficient reducing and capping agent for the synthesis of nanometric-sized Ag particles. Gelatin films with nanoparticles are expected to have high potential as an active food packaging system. Full article
(This article belongs to the Special Issue Advances in Natural Polymers: Extraction Methods and Applications)
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Review

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Review
Advances in the Utilization of Tea Polysaccharides: Preparation, Physicochemical Properties, and Health Benefits
Polymers 2022, 14(14), 2775; https://doi.org/10.3390/polym14142775 - 06 Jul 2022
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Abstract
Tea polysaccharide (TPS) is the second most abundant ingredient in tea following tea polyphenols. As a complex polysaccharide, TPS has a complex chemical structure and a variety of bioactivities, such as anti-oxidation, hypoglycemia, hypolipidemic, immune regulation, and anti-tumor. Additionally, it shows excellent development [...] Read more.
Tea polysaccharide (TPS) is the second most abundant ingredient in tea following tea polyphenols. As a complex polysaccharide, TPS has a complex chemical structure and a variety of bioactivities, such as anti-oxidation, hypoglycemia, hypolipidemic, immune regulation, and anti-tumor. Additionally, it shows excellent development and application prospects in food, cosmetics, and medical and health care products. However, numerous studies have shown that the bioactivity of TPS is closely related to its sources, processing methods, and extraction methods. Therefore, the authors of this paper reviewed the relevant recent research and conducted a comprehensive and systematic review of the extraction methods, physicochemical properties, and bioactivities of TPS to strengthen the understanding and exploration of the bioactivities of TPS. This review provides a reference for preparing and developing functional TPS products. Full article
(This article belongs to the Special Issue Advances in Natural Polymers: Extraction Methods and Applications)
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Review
Milk Whey Hydrolysates as High Value-Added Natural Polymers: Functional Properties and Applications
Polymers 2022, 14(6), 1258; https://doi.org/10.3390/polym14061258 - 21 Mar 2022
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Abstract
There are two types of milk whey obtained from cheese manufacture: sweet and acid. It retains around 55% of the nutrients of the milk. Milk whey is considered as a waste, creating a critical pollution problem, because 9 L of whey are produced [...] Read more.
There are two types of milk whey obtained from cheese manufacture: sweet and acid. It retains around 55% of the nutrients of the milk. Milk whey is considered as a waste, creating a critical pollution problem, because 9 L of whey are produced from every 10 L of milk. Some treatments such as hydrolysis by chemical, fermentation process, enzymatic action, and green technologies (ultrasound and thermal treatment) are successful in obtaining peptides from protein whey. Milk whey peptides possess excellent functional properties such as antihypertensive, antiviral, anticancer, immunity, and antioxidant, with benefits in the cardiovascular, digestive, endocrine, immune, and nervous system. This review presents an update of the applications of milk whey hydrolysates as a high value-added peptide based on their functional properties. Full article
(This article belongs to the Special Issue Advances in Natural Polymers: Extraction Methods and Applications)
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