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Special Issue "Functional Polymeric Materials and Green Chemistry"

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Department of Bio-Fibers and Materials Science, Kyungpook National University, Daegu 41566, Republic of Korea
Interests: functional surfaces and interfaces of polymer and nanomaterials; polymer nanocomposite; sustainable materials
Special Issues, Collections and Topics in MDPI journals

Dr. Kyeongwoon Chung

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Guest Editor

Department of Biofibers and Biomaterials Science, Kyungpook National University, Daegu 41566, Republic of Korea
Interests: materials design and synthesis; functional polymers; stimuli-responsive materials; additive manufacturing; biomedical; energy; sensors
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue will highlight recent advances in functional polymeric materials and green chemistry that have been developed in various fields of science and industry, including material design, chemistry and synthesis, material characteristics, processing, and applications.

The main topics include but are not limited to:

Smart and high-performance polymeric materials;
Green chemistry for functional polymeric materials;
Sustainable, bio-based polymeric materials;
Polymeric materials for additive manufacturing.

It is my pleasure to invite you to submit a manuscript to this Special Issue of Materials. Submissions of communications, full papers, and reviews are all welcome.

Dr. Jaehyeung Park
Dr. Kyeongwoon Chung
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 2300 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

sustainability
bio-based polymer
functional polymers and organic molecules
stimuli-responsive materials
gels
additive manufacturing

Published Papers (2 papers)

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Research

Open AccessArticle

Influence of Reactive Amine-Based Catalysts on Cryogenic Properties of Rigid Polyurethane Foams for Space and On-Ground Applications

and

Materials 2023, 16(7), 2798; https://doi.org/10.3390/ma16072798 - 31 Mar 2023

Viewed by 587

Abstract

Rigid polyurethane (PUR) foams have outstanding properties, and some of them are successfully used even today as cryogenic insulation. The fourth-generation blowing agent Solstice^® LBA and commercial polyols were used for the production of a low-density cryogenic PUR foam composition. A lab-scale pouring method for PUR foam preparation and up-scaling of the processes using an industrial spraying machine are described in this article. For the determination of the foam properties at cryogenic temperature, original methods, devices, and appliances were used. The properties at room and cryogenic temperatures of the developed PUR foams using a low-toxicity, bismuth-based, and low-emission amine catalyst were compared with a reference foam with a conventional tin-based additive amine catalyst. It was found that the values of important cryogenic characteristics such as adhesion strength after cryoshock and the safety coefficient of the PUR foams formed with new reactive-type amine-based catalysts and with the blowing agent Solstice^® LBA were higher than those of the foam with conventional catalysts. Full article

(This article belongs to the Special Issue Functional Polymeric Materials and Green Chemistry)

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Open AccessArticle

Preparation and Characterization of Poly(Acrylic Acid)-Based Self-Healing Hydrogel for 3D Shape Fabrication via Extrusion-Based 3D Printing

Woohyeon Shin

and

Kyeongwoon Chung

Materials 2023, 16(5), 2085; https://doi.org/10.3390/ma16052085 - 03 Mar 2023

Viewed by 663

Abstract

The three-dimensional (3D) printing of hydrogel is an issue of interest in various applications to build optimized 3D structured devices beyond 2D-shaped conventional structures such as film or mesh. The materials design for the hydrogel, as well as the resulting rheological properties, largely affect its applicability in extrusion-based 3D printing. Here, we prepared a new poly(acrylic acid)-based self-healing hydrogel by controlling the hydrogel design factors based on a defined material design window in terms of rheological properties for application in extrusion-based 3D printing. The hydrogel is designed with a poly(acrylic acid) main chain with a 1.0 mol% covalent crosslinker and 2.0 mol% dynamic crosslinker, and is successfully prepared based on radical polymerization utilizing ammonium persulfate as a thermal initiator. With the prepared poly(acrylic acid)-based hydrogel, self-healing characteristics, rheological characteristics, and 3D printing applicability are deeply investigated. The hydrogel spontaneously heals mechanical damage within 30 min and exhibits appropriate rheological characteristics, including G′~1075 Pa and tan δ~0.12, for extrusion-based 3D printing. Upon application in 3D printing, various 3D structures of hydrogel were successfully fabricated without showing structural deformation during the 3D printing process. Furthermore, the 3D-printed hydrogel structures exhibited excellent dimensional accuracy of the printed shape compared to the designed 3D structure. Full article

(This article belongs to the Special Issue Functional Polymeric Materials and Green Chemistry)

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Special Issue "Functional Polymeric Materials and Green Chemistry"

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