materials-logo

Journal Browser

Journal Browser

Sustainable Reactive Processing of Raw Materials and Polymer Compounds

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

Deadline for manuscript submissions: closed (31 July 2021) | Viewed by 5928

Special Issue Editor


E-Mail Website
Guest Editor
Technische Universität Dresden, Dresden, Germany
Interests: reactive electron treatment; fibre reinforced polymers

Special Issue Information

Dear Colleagues,

Global warming and increased environmental pollution have stimulated the use of renewable polymers and sustainable processing methods for the preparation of environmentally friendly, high-performance polymer compounds with tailored functionality. Reactive compounding, which combines the physical and chemical modification of polymers, is used for reactive blending, functionalisation, long chain branching, grafting and dynamic vulcanisation. In state-of-the-art reactive compounding, the use of thermally sensitive reaction initiators limits the environmental compatibility of the process. Consequently, there is a need for alternative reaction initiators. This Special Issue aims to present a collection of the latest research on sustainable reactive processes for the chemical modification of raw materials (fibres, fillers), polymers and polymer compounds by biological (e.g., enzymes) and physical (e.g., electromagnetic fields, electron and plasma treatment, laser, microwaves) methods. Contributions on recent experimental and theoretical aspects aiming to understand the reaction mechanisms and effects on the interface/interphase and chemical, mechanical, physical and thermal properties of compound components are welcome. Reports of research studies on biomaterial-based polymer compounds prepared by sustainable processes and on the challenges of green chemistry are also of interest.

Dr. Uwe Gohs
Guest Editor

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

  • green reactive processing
  • polymers
  • fibers, fillers
  • enzyme modification
  • electromagnetic treatment
  • electron treatment
  • laser treatment
  • microwave treatment
  • plasma treatment

Benefits of Publishing in a Special Issue

  • Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • e-Book format: Special Issues with more than 10 articles can be published as dedicated e-books, ensuring wide and rapid dissemination.

Further information on MDPI's Special Issue polices can be found here.

Published Papers (2 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Research

14 pages, 4557 KiB  
Article
Laccase-Enzyme Treated Flax Fibre for Use in Natural Fibre Epoxy Composites
by Hanna M. Brodowsky, Anne Hennig, Michael Thomas Müller, Anett Werner, Serge Zhandarov and Uwe Gohs
Materials 2020, 13(20), 4529; https://doi.org/10.3390/ma13204529 - 13 Oct 2020
Cited by 11 | Viewed by 2403
Abstract
Natural fibres have a high potential as reinforcement of polymer matrices, as they combine a high specific strength and modulus with sustainable production and reasonable prices. Modifying the fibre surface is a common method to increase the adhesion and thereby enhance the mechanical [...] Read more.
Natural fibres have a high potential as reinforcement of polymer matrices, as they combine a high specific strength and modulus with sustainable production and reasonable prices. Modifying the fibre surface is a common method to increase the adhesion and thereby enhance the mechanical properties of composites. In this study, a novel sustainable surface treatment is presented: the fungal enzyme laccase was utilised with the aim of covalently binding the coupling agent dopamine to flax fibre surfaces. The goal is to improve the interfacial strength towards an epoxy matrix. SEM and AFM micrographs showed that the modification changes the surface morphology, indicating a deposition of dopamine on the surface. Fibre tensile tests, which were performed to check whether the fibre structure was damaged during the treatment, showed that no decrease in tensile strength or modulus occurred. Single fibre pullout tests showed a 30% increase in interfacial shear strength (IFSS) due to the laccase-mediated bonding of the coupling agent dopamine. These results demonstrate that a laccase + dopamine treatment modifies flax fibres sustainably and increases the interfacial strength towards epoxy. Full article
Show Figures

Figure 1

17 pages, 3310 KiB  
Article
New Materials Based on Ethylene Propylene Diene Terpolymer and Hemp Fibers Obtained by Green Reactive Processing
by Maria Daniela Stelescu, Elena Manaila, Mihai Georgescu and Mihaela Nituica
Materials 2020, 13(9), 2067; https://doi.org/10.3390/ma13092067 - 30 Apr 2020
Cited by 15 | Viewed by 3061
Abstract
The paper presents the obtaining of new green polymeric composites using a sustainable reactive processing method, namely electron beam irradiation. EPDM rubber mixtures were reinforced with different amounts of short hemp fibers, which were then irradiated at doses between 75 and 600 kGy. [...] Read more.
The paper presents the obtaining of new green polymeric composites using a sustainable reactive processing method, namely electron beam irradiation. EPDM rubber mixtures were reinforced with different amounts of short hemp fibers, which were then irradiated at doses between 75 and 600 kGy. The samples were analyzed by determination of physical–mechanical properties, sol–gel analysis, crosslink density (using the well-known modified Flory–Rehner equation for tetra functional networks), determination of rubber–fiber interactions (using the Kraus equation), water uptake test and FTIR analysis. The obtained results indicate an improvement of the hardness, the tensile and tear strength as the quantity of hemp fibers increases. As the irradiation dose increases, there is an increase in the degree of crosslinking and the gel fraction. Analyzing the behavior of the irradiation samples using the Charlesby–Pinner equation, it is observed that all the samples tend to crosslink by irradiation, the share of degradation reactions being low. For these reasons, the new materials can be used in the food, pharmaceutical or medical field, because the obtained products are sterile and can be easily resterilized by irradiation. They have high elasticity values and can be used to make packaging, seals and other consumer goods. Full article
Show Figures

Figure 1

Back to TopTop