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Polymers
Special Issues
Advanced Polyureas
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Advanced Polyureas

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

Deadline for manuscript submissions: closed (31 May 2022) | Viewed by 9915

Special Issue Editors

Prof. Dr. Vasco D. B. Bonifácio

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Guest Editor
IBB—Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisbon, Portugal
Interests: polyurea dendrimers; synthetic mimics of antimicrobial peptides; nanotherapeutics; cancer theranostics; cancer radiotheranostics; regenerative nanomedicine; green chemistry; mechanochemistry; sonochemistry; non-traditional intrinsic luminescence
Special Issues, Collections and Topics in MDPI journals
Dr. Rita F. Pires

E-Mail Website
Guest Editor
Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
Interests: polyurea dendrimers; organic synthesis; polymer synthesis; nanomedicine
Dr. Nuno Martinho

E-Mail Website
Guest Editor
Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, 1649-004 Lisbon, Portugal
Interests: dendrimers; molecular modeling; polymer synthesis; nanomedicine; green chemistry

Special Issue Information

Dear Colleagues,

Polyureas are amazing polymers that have emerged as advanced materials in the last few years. Applications of polyurea-based materials range from nanomedicine to nanotechnology, and many efforts have been made to optimize their synthesis, especially using green methodologies, and fully explore their potential by the rational design of novel functional architectures.

This Special Issue is concerned both with molecular dynamic simulation studies and the synthesis and functionalization of polyureas that enable the development of novel nanomaterials, and will help to compile the current state-of-the-art and to highlight their range of applications, namely, in therapeutics, nanocatalysis, and regenerative medicine. Both original contributions and reviews are welcome.

Dr. Vasco D.B. Bonifácio
Dr. Rita F. Pires
Dr. Nuno Martinho
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 2700 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

  • Polyureas
  • Hyperbranched polyureas
  • Polyurea dendrimers
  • Polyurea composites
  • Green chemistry
  • Drug delivery
  • Gene delivery
  • Nanomedicine
  • Regenerative medicine
  • Nanocatalysis
  • Molecular modeling

Published Papers (2 papers)

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Research

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20 pages, 5784 KiB  
Article
Achievement of Both Mechanical Properties and Intrinsic Self-Healing under Body Temperature in Polyurethane Elastomers: A Synthesis Strategy from Waterborne Polymers
by Liangdong Zhang, Teng Qiu, Xiting Sun, Longhai Guo, Lifan He, Jun Ye and Xiaoyu Li
Polymers 2020, 12(4), 989; https://doi.org/10.3390/polym12040989 - 24 Apr 2020
Cited by 32 | Viewed by 4274
Abstract
Inspired by the growing demand for smart and environmentally friendly polymer materials, we employed 2,2′-disulfanediyldianiline (22DTDA) as a chain extender to synthesize a waterborne polyurethane (WPUR). Due to the ortho-substituted structure of the aromatic disulfide, the urea moieties formed a unique microphase structure [...] Read more.
Inspired by the growing demand for smart and environmentally friendly polymer materials, we employed 2,2′-disulfanediyldianiline (22DTDA) as a chain extender to synthesize a waterborne polyurethane (WPUR). Due to the ortho-substituted structure of the aromatic disulfide, the urea moieties formed a unique microphase structure in the WPUR, its mechanical strength was enhanced more 180 times relative to that of the material prepared without 22DTDA, and excellent self-healing abilities at body temperature in air or under ultrasound in water were obtained. If the self-healing process was carried out at 37 °C, 50 °C or under ultrasound, the ultimate tensile strength and elongation at break of the healed film could reach 13.8 MPa and 1150%, 15.4 MPa and 1215%, or 16 MPa and 1056%, respectively. Moreover, the WPUR films could be re-healed at the same fracture location over three cutting–healing cycles, and the recovery rates of the tensile strength and elongation at break remained almost constant throughout these cycles. Full article
(This article belongs to the Special Issue Advanced Polyureas)
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Review

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44 pages, 14759 KiB  
Review
Polyureas Versatile Polymers for New Academic and Technological Applications
by Jeferson Santos Santana, Elisangela Silvana Cardoso, Eduardo Rezende Triboni and Mário José Politi
Polymers 2021, 13(24), 4393; https://doi.org/10.3390/polym13244393 - 15 Dec 2021
Cited by 21 | Viewed by 4875
Abstract
Polyureas (PURs) are a competitive polymer to their analogs, polyurethanes (PUs). Whereas PUs’ main functional group is carbamate (urethane), PURs contain urea. In this revision, a comprehensive overview of PUR properties, from synthesis to technical applications, is displayed. Preparative routes that can be [...] Read more.
Polyureas (PURs) are a competitive polymer to their analogs, polyurethanes (PUs). Whereas PUs’ main functional group is carbamate (urethane), PURs contain urea. In this revision, a comprehensive overview of PUR properties, from synthesis to technical applications, is displayed. Preparative routes that can be used to obtain PURs using diisocianates or harmless reagents such as CO2 and NH3 are explained, and aterials, urea monomers and PURs are discussed; PUR copolymers are included in this discussion as well. Bulk to soft components of PUR, as well as porous materials and meso, micro or nanomaterials are evaluated. Topics of this paper include the general properties of aliphatic and aromatic PUR, followed by practical synthetic pathways, catalyst uses, aggregation, sol–gel formation and mechanical aspects. Full article
(This article belongs to the Special Issue Advanced Polyureas)
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