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Developing Polymers/Composites/Coatings for Space/Satellite Applications

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: closed (31 August 2020) | Viewed by 9937

Special Issue Editor


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Guest Editor
Bristol Composites Institute (ACCIS), University of Bristol, Bristol, UK
Interests: high performance polymers; composites; nanomaterials

Special Issue Information

Internationally recognized authority in the field of high-performance polymers and composites. Total research income of £12,119,007 (personal attribution £5,174,200). Currently holds a £1M+ EPSRC grant (EP/P027393/1: High Performance Discontinuous Fiber Composites—a sustainable route to the next generation of composites). Web of Science: 209 publications, 3 edited books, 2516 citations in 2074 articles; average of 100.96 citations/year (18.96 citations/publication) h-index of 25. Google Scholar: 4674 citations (1854 since 2013), h-index of 33, i10-index of 95. Research Gate RG 42.69. 8 patent applications as a co-inventor.

Interests: high performance polymers; high temperature materials; radiation resistance; cyanate esters; bismaleimides; epoxy resins; polyimides; thermoset polymers; engineering thermoplastics; vitrimers; covalent adaptive networks; polymer composites; nanomaterials; wind turbines; satellites; automotive composites; aerospace engineering; flame retardants; monomer synthesis; polymer blends; circular economy; composite recycling; polymer degradation mechanisms; artists’ pigments; historical artefacts

Dear Colleagues,

Advanced composite materials are promising candidates to replace metals in space applications, particularly those involving deployable structures, mirror structures, booms, protective coatings, and spacecraft components, because of their high specific strength resulting from their light weight. The high vacuum, vacuum ultraviolet (VUV) radiation, extreme thermal cycling, and risk of atomic oxygen (AO) erosion, make the space environment a highly aggressive one, severely limiting the durability of composite materials.  When employed in low Earth orbit (LEO), satellites are particularly prone to AO exposure, which plays a major role in the degradation of polymer-based composite materials. Several in orbit tests have been performed by various bodies, such as the European Space Agency (ESA), JAXA, and NASA, in order to understand the resistance of various materials to AO and VUV.
Typically, the composite must display high glass transition temperatures and thermal stability, but must be combined with a good impact resistance in the event of high-speed impact from space debris or microcracking during thermal excursions. Epoxy resins, cyanate esters, and polyimides are the most commonly used composite matrices in this application, with a number of space-qualified resins now commercially available, but extensive research is being undertaken to develop the next generation of polymers. Nanocomposites (which incorporate carbon nanotubes, graphene, or nanosilica) have been shown to improve the performance of polymers in these extreme conditions, and to extend their functional lifetime.
This Special Issue aims to cover the recent progress and trends in the development of new materials (as polymer coatings, composite matrices, or functional nanocomposites) for use in space applications. Submissions are welcome covering, but not limited to, the topics listed below. Types of contributions to this Special Issue can be full research articles, short communications, and reviews focusing on the development of polymers and composites for space applications.

  • Measurement of mechanical properties (strength/modulus) of composites for space;
  • Development of protective coatings for satellite components;
  • Effects of outgassing on polymer properties;
  • Examination of degradation mechanisms for space polymers;
  • Synthesis of new monomers and polymers (e.g., resins and polymers);
  • Production of carbon fiber reinforced light-weight composite materials;
  • Multifunctional composites with electrical static discharge properties;
  • Multifunctional composites with enhanced thermal conductivity;
  • Production of graphene for use in supercapacitors for energy storage.

Prof. Ian Hamerton
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. Molecules 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

  • Space materials
  • Chemical characterization
  • Chemical modification
  • Polymerization
  • Polymer degradation
  • Atomic oxygen
  • UV exposure
  • Polyimides
  • Cyanate ester resins
  • Epoxy resins
  • Benzoxazine resins
  • Fluoropolymers
  • Synthesis
  • Resins
  • Polymers
  • Carbon fibers
  • Composites
  • Graphene
  • Polysilsesquioxanes (POSS)
  • Nanocomposites
  • Mechanical properties

Published Papers (3 papers)

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Research

16 pages, 1907 KiB  
Article
Structure and Performance of Benzoxazine Composites for Space Radiation Shielding
by Scott Winroth, Chris Scott and Hatsuo Ishida
Molecules 2020, 25(18), 4346; https://doi.org/10.3390/molecules25184346 - 22 Sep 2020
Cited by 21 | Viewed by 3222
Abstract
Innovative multifunctional materials that combine structural functionality with other spacecraft subsystem functions have been identified as a key enabling technology for future deep space missions. In this work, we report the structure and performance of multifunctional polymer matrix composites developed for aerospace applications [...] Read more.
Innovative multifunctional materials that combine structural functionality with other spacecraft subsystem functions have been identified as a key enabling technology for future deep space missions. In this work, we report the structure and performance of multifunctional polymer matrix composites developed for aerospace applications that require both structural functionality and space radiation shielding. Composites comprised of ultra-high molecular weight polyethylene (UHMWPE) fiber reinforcement and a hydrogen-rich polybenzoxazine matrix are prepared using a low-pressure vacuum bagging process. The polybenzoxazine matrix is derived from a novel benzoxazine resin that possesses a unique combination of attributes: high hydrogen concentration for shielding against galactic cosmic rays (GCR), low polymerization temperature to prevent damage to UHMWPE fibers during composite fabrication, long shelf-life, and low viscosity to improve flow during molding. Dynamic mechanical analysis (DMA) is used to study rheological and thermomechanical properties. Composite mechanical properties, obtained using several standardized tests, are reported. Improvement in composite stiffness, through the addition of carbon fiber skin layers, is investigated. Radiation shielding performance is evaluated using computer-based simulations. The composites demonstrate clear advantages over benchmark materials in terms of combined structural and radiation shielding performance. Full article
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19 pages, 2313 KiB  
Article
The Effect of POSS Type on the Shape Memory Properties of Epoxy-Based Nanocomposites
by Avraham I. Bram, Irina Gouzman, Asaf Bolker, Noam Eliaz and Ronen Verker
Molecules 2020, 25(18), 4203; https://doi.org/10.3390/molecules25184203 - 14 Sep 2020
Cited by 7 | Viewed by 2253
Abstract
Thermally activated shape memory polymers (SMPs) can memorize a temporary shape at low temperature and return to their permanent shape at higher temperature. These materials can be used for light and compact space deployment mechanisms. The control of transition temperature and thermomechanical properties [...] Read more.
Thermally activated shape memory polymers (SMPs) can memorize a temporary shape at low temperature and return to their permanent shape at higher temperature. These materials can be used for light and compact space deployment mechanisms. The control of transition temperature and thermomechanical properties of epoxy-based SMPs can be done using functionalized polyhedral oligomeric silsesquioxane (POSS) additives, which are also known to improve the durability to atomic oxygen in the space environment. In this study, the influence of varying amounts of two types of POSS added to epoxy-based SMPs on the shape memory effect (SME) were studied. The first type contained amine groups, whereas the second type contained epoxide groups. The curing conditions were defined using differential scanning calorimetry and glass transition temperature (Tg) measurements. Thermomechanical and SME properties were characterized using dynamic mechanical analysis. It was found that SMPs containing amine-based POSS show higher Tg, better shape fixity and faster recovery speed, while SMPs containing epoxide-based POSS have higher crosslinking density and show superior thermomechanical properties above Tg. This work demonstrates how the Tg and SME of SMPs can be controlled by the type and amount of POSS in an epoxy-based SMP nanocomposite for future space applications. Full article
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22 pages, 6043 KiB  
Article
Development of Cycloaliphatic Epoxy-POSS Nanocomposite Matrices with Enhanced Resistance to Atomic Oxygen
by Mayra Y. Rivera Lopez, Javier Martin Lambas, Jonathan P. Stacey, Sachithya Gamage, Agnieszka Suliga, Andrew Viquerat, Fabrizio Scarpa and Ian Hamerton
Molecules 2020, 25(7), 1483; https://doi.org/10.3390/molecules25071483 - 25 Mar 2020
Cited by 16 | Viewed by 3162
Abstract
The preparation of ultra-thin CFRP laminates, which incorporate a cycloaliphatic epoxy resin reinforced with polyhedral oligomeric silsesquioxane (POSS) reagent nanofiller, using out-of-autoclave procedure is reported. The influence of the amount of POSS within the laminate on the mechanical properties and surface roughness of [...] Read more.
The preparation of ultra-thin CFRP laminates, which incorporate a cycloaliphatic epoxy resin reinforced with polyhedral oligomeric silsesquioxane (POSS) reagent nanofiller, using out-of-autoclave procedure is reported. The influence of the amount of POSS within the laminate on the mechanical properties and surface roughness of the laminates is analysed before and after exposure to atomic oxygen (AO) to simulate the effects of low Earth orbit (LEO). The addition of 5 wt% POSS to the base epoxy leads to an increase in both flexural strength and modulus, but these values begin to fall as the POSS content rises, possibly due to issues with agglomeration. The addition of POSS offers improved resistance against AO degradation with the laminates containing 20 wt% POSS demonstrating the lowest erosion yield (1.67 × 10−24 cm2/atom) after the equivalent of a period of 12 months in a simulated LEO environment. Exposure to AO promotes the formation of a silicon-rich coating layer on the surface of the laminate, which in turn reduces roughness and increases stiffness, as evidenced by measurements of flexural properties and spectral data after exposure. Full article
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