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Regularly Structured Porous Materials and New Discoveries in Additive Manufacturing

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

Deadline for manuscript submissions: 20 July 2025 | Viewed by 705

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Faculty of Manufacturing Technologies, Technical University in Kosice, Kosice, Slovakia
Interests: mechanical engineering with the specification on computer aid of technical devices design, analyses, and simulations; cellular materials; manufacturing technologies
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Special Issue Information

Dear Colleagues,

Rapid developments in materials and production technologies have made it possible to produce new types of sophisticated components that are significantly lighter than traditional products whose entire volume consists of solid material. Such components are composed of materials characterized by a periodic or stochastic arrangement of open or closed pores, leading to differing characteristics in terms of their topology, whether they are two-dimensional configurations of structures (e.g., honeycomb), three-dimensional polyhedral arrangements (e.g., lattice structures), or three-dimensional periodic complex shapes (e.g., minimum areas). These specific materials can provide a product with an extraordinary combination of mechanical, physical, and chemical properties compared to full-volume materials. The desire to incorporate sophisticated structures into component design is motivated by the aspiration to increase the added value of the product, shorten the production time, and reduce the consumption of expensive materials. Regarding the expected properties, the use of such constructions appears to be very promising, not only in the areas of industry (automotive, marine, aviation, aerospace, engineering, construction), medicine, biomedicine, and health care, but also in products of daily use or household appliances. 

Potential topics include, but are not limited to, the following:

  • Recent innovations in materials with a regular distribution of pores (cellular materials/mesoporous materials/metamaterials/lightweight materials);
  • Mechanical/chemical/physical properties;
  • Testing, analysis, simulation, and behavior;
  • Production and processing;
  • Application.

Prof. Dr. Katarina Monkova
Guest Editor

Manuscript Submission Information

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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

  • regularly structured porous materials
  • design
  • preparation
  • application
  • properties
  • testing
  • analysis

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Published Papers (1 paper)

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Research

20 pages, 8319 KiB  
Article
Shortening the Saturation Time of PBAT Sheet Foaming via the Pre-Introducing of Microporous Structures
by Fangwei Tian, Junjie Jiang, Yaozong Li, Hanyi Huang, Yushu Wang, Ziwei Qin and Wentao Zhai
Materials 2025, 18(5), 1044; https://doi.org/10.3390/ma18051044 - 26 Feb 2025
Cited by 1 | Viewed by 554
Abstract
Poly (butylene adipate-co-terephthalate) (PBAT) foam sheets prepared by foaming supercritical fluids are characterized by high resilience, homogeneous cellular structure, and well-defined biodegradability. However, the inert chemical structure and the rigid hard segments restrict the diffusion of CO2 within the PBAT matrix, resulting [...] Read more.
Poly (butylene adipate-co-terephthalate) (PBAT) foam sheets prepared by foaming supercritical fluids are characterized by high resilience, homogeneous cellular structure, and well-defined biodegradability. However, the inert chemical structure and the rigid hard segments restrict the diffusion of CO2 within the PBAT matrix, resulting in extremely long gas saturation times as long as 9 h at a thickness of 12 mm. In this study, microporous structures were pre-introduced into the PBAT matrix to provide a fast gas diffusion pathway during the saturation process. After 2 h of saturation, PBAT foam sheets with expansion ratio of 10 to 13.8 times were prepared. The interaction of CO2 with PBAT was systematically investigated, and the CO2 sorption process was evaluated kinetically and thermodynamically using the Fickian diffusion theory. The solubility and diffusion rate of CO2 in pretreated PBAT sheets with different microporous sizes and densities were investigated, and the effects of pretreatment strategies on the foaming behavior and cell structure of PBAT foam sheets were discussed. The introduction of a microporous structure not only reduces saturation time but also enhances solubility, enabling the successful preparation of soft foams with high expansion ratios and resilience. After undergoing foaming treatment, the PBAT pretreated sheets with a 10 μm microporous structure and a density of 0.45 g/cm3 demonstrated improved mechanical properties: their hardness decreased to 35 C while resilience increased to 58%, reflecting enhanced elastic recovery capabilities. The pretreatment method, which increases the diffusion rate of CO2 in PBAT sheets, offers a straightforward approach that provides valuable insights into achieving rapid and efficient foaming of thick PBAT sheets in industrial applications. Full article
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