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Polymer Composites for 3D Printing II

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

Deadline for manuscript submissions: closed (29 February 2024) | Viewed by 4350

Special Issue Editors


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Guest Editor
School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164, USA
Interests: additive manufacturing; biomedical manufacturing; drug delivery, medical devices
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
Interests: robotic sensing; 3D printing and additive manufacturing
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Additive manufacturing, commonly known as three-dimensional (3D) printing, is a manufacturing process that builds 3D objects by successively adding materials to the workpiece. Most 3D printing systems are geared toward the fabrication of standardized materials. Polymer composites, a class of multi-phase materials, offer a wide variety of material properties that can be tailored based on the need, such as improved mechanical strength or electrical conductivity. When altering the composition of a polymer composite to achieve the desired properties or functionalities, the processing characteristics (e.g., rheological properties or curing kinetics) also change, thus presenting new challenges for the 3D printing of polymer composites. Moreover, controlling the distribution of the filler materials is often desired, but is challenging to accomplish. A synergistic approach considering processing characteristics and resultant properties is needed when working with polymer composites for 3D printing. 

On the success of "Polymer Composites for 3D Printing", a Special Issue in Polymers, https://www.mdpi.com/journal/polymers/special_issues/Polym_Compos_3D_Print, and to provide a continuity in this topic, we are pleased to open the second volume of this Special Issue in order to continue the collection of the development of polymer composite material systems for 3D printing, advances in 3D printing processes for polymer composites, and the characterization and application of 3D-printed polymer composites. This Special Issue is being released with the intention to assemble a collection of recent research findings in this field, and to inspire future research.

Dr. Roland Kuen-Ren Chen
Dr. Yancheng Wang
Guest Editors

Manuscript Submission Information

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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

  • 3D printing
  • additive manufacturing
  • material extrusion
  • vat photopolymerization
  • stereolithography
  • digital light processing
  • material jetting
  • composites
  • functional materials
  • functional graded materials

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Published Papers (2 papers)

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Research

17 pages, 7356 KiB  
Article
Shrinkage Compensation and Effect of Building Orientation on Mechanical Properties of Ceramic Stereolithography Parts
by Piyush Arora, Khaled G. Mostafa, Emmanuel Russell, Shirin Dehgahi, Sajid Ullah Butt, Didier Talamona and Ahmed Jawad Qureshi
Polymers 2023, 15(19), 3877; https://doi.org/10.3390/polym15193877 - 25 Sep 2023
Cited by 9 | Viewed by 1861
Abstract
Stereolithography additive manufacturing (SLA-AM) can be used to produce ceramic structures by selectively curing a photosensitive resin that has ceramic powder in it. The photosensitive resin acts as a ceramic powder binder, which is burned, and the remaining ceramic part is sintered during [...] Read more.
Stereolithography additive manufacturing (SLA-AM) can be used to produce ceramic structures by selectively curing a photosensitive resin that has ceramic powder in it. The photosensitive resin acts as a ceramic powder binder, which is burned, and the remaining ceramic part is sintered during post-processing using a temperature–time-controlled furnace. Due to this process, the ceramic part shrinks and becomes porous. Moreover, additive manufacturing leads to the orthotropic behavior of the manufactured parts. This article studies the effect of the manufacturing orientation of ceramic parts produced via SLA-AM on dimensional accuracy. Scaled CAD models were created by including the calculated shrinkage factor. The dimensions of the final sintered specimens were very close to the desired dimensions. As sintering induces porosity and reduces the mechanical strength, in this study, the effect of orientation on strength was investigated, and it was concluded that the on-edge specimen possessed by far the highest strength in terms of both compression and tension. Full article
(This article belongs to the Special Issue Polymer Composites for 3D Printing II)
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13 pages, 2465 KiB  
Article
Vat Polymerization by Three-Dimensional Printing and Curing of Antibacterial Zinc Oxide Nanoparticles Embedded in Poly(ethylene glycol) Diacrylate for Biomedical Applications
by Guy Naim, Netta Bruchiel-Spanier, Shelly Betsis, Noam Eliaz and Daniel Mandler
Polymers 2023, 15(17), 3586; https://doi.org/10.3390/polym15173586 - 29 Aug 2023
Cited by 2 | Viewed by 1851
Abstract
Digital light processing (DLP) is a vat photopolymerization 3D printing technique with increasingly broad application prospects, particularly in personalized medicine, such as the creation of medical devices. Different resins and printing parameters affect the functionality of these devices. One of the many problems [...] Read more.
Digital light processing (DLP) is a vat photopolymerization 3D printing technique with increasingly broad application prospects, particularly in personalized medicine, such as the creation of medical devices. Different resins and printing parameters affect the functionality of these devices. One of the many problems that biomedical implants encounter is inflammation and bacteria growth. For this reason, many studies turn to the addition of antibacterial agents to either the bulk material or as a coating. Zinc oxide nanoparticles (ZnO NPs) have shown desirable properties, including antibacterial activity with negligible toxicity to the human body, allowing their use in a wide range of applications. In this project, we developed a resin of poly(ethylene glycol) diacrylate (PEGDA), a cross-linker known for its excellent mechanical properties and high biocompatibility in a 4:1 weight ratio of monomers to water. The material’s mechanical properties (Young’s modulus, maximum elongation, and ultimate tensile strength) were found similar to those of human cartilage. Furthermore, the ZnO NPs embedding matrix showed strong antibacterial activity against Escherichia coli (E. coli) and Staphylococcus aureus (S.A.). As the ZnO NPs ratio was changed, only a minor effect on the mechanical properties of the material was observed, whereas strong antibacterial properties against both bacteria were achieved in the case of 1.5 wt.% NPs. Full article
(This article belongs to the Special Issue Polymer Composites for 3D Printing II)
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