Article
Polymer Science
Aniol Bosch, Enric Casanova-Batlle, Iuliana Constantin, Carles Rubio, Joaquim Ciurana, Antonio J. Guerra
Summary: In this study, an innovative manufacturing method for polymeric stent production using tubular stereolithography (SLA) technology is proposed for both bioresorbable stents (BRS) and ultrathin polymeric drug-eluting stents (DES). The effects of manufacturing process parameters were studied, and promising results were obtained, overcoming the limitations of previous technologies.
Article
Engineering, Electrical & Electronic
Pin-Chuan Chen, Cing-Sung Yeh, Chih-Yu Hsieh
Summary: This study applied defocusing to digital light processing (DLP) stereolithography to fabricate microlens arrays (MLAs) within 1 s. The effects of exposure energy, defocus distance, and a diameter adjustment algorithm were investigated to achieve MLAs with desired dimensions. The results showed that the proposed fabrication method is suitable for various MLA designs, with nanoscale surface roughness and good image quality.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Polymer Science
Pin-Chuan Chen, Po-Tsang Chen, Tuan Ngoc Anh Vo
Summary: Stereolithographic printing is used for creating microfluidic devices, but challenges exist in forming microchannels smaller than 500 μm with good inner surface quality. Through experiments, it was found that a three-step printing process can improve dimensional accuracy and inner microchannel surface quality, allowing the successful manufacture of high-aspect-ratio microchannels in a short time.
Article
Engineering, Biomedical
Srijan Maharjan, Milan Gautam, Kishwor Poudel, Chul Soon Yong, Sae Kwang Ku, Jong Oh Kim, Jeong Hoon Byeon
Summary: Significant advances have been made in nano-drug delivery systems for anticancer agents, with the development of computational techniques and an on-demand system for continuous assembly. The system enables the production of a mild chemotherapeutic NDDS and the reconfiguration of NDDS with different architectures and compositions.
Article
Materials Science, Ceramics
Mehdi Mohammadi, Bartolomeo Coppola, Laura Montanaro, Paola Palmero
Summary: Dense hydroxyapatite bars were produced using digital light processing. The effects of HA particle size, curing depth-to-layer thickness ratio, and debinding process on printing/debinding flaws and flexural strength were studied. Optimized bars achieved a flexural strength exceeding 100 MPa, the highest obtained through lithography-based techniques for dense HA fabrication.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Engineering, Manufacturing
Mykola Posternak, Gabriel Toshiaki Tayama, Sandra Helena Messaddeq, Younes Messaddeq
Summary: A model describing the UV laser scanning vat-photopolymerization additive manufacturing process was developed and tested, demonstrating its reliability. The model can help researchers understand the relationship between processing parameters and material properties, and improve the efficiency and speed of additive manufacturing technology.
ADDITIVE MANUFACTURING
(2022)
Article
Engineering, Manufacturing
Jigang Huang, Zhengda Chen, Cheng Wen, Tingxian Ling, Zhangwei Chen
Summary: This study presents a thermally assisted stereolithography process that balances the flowability and solute loadings in polymers for improved performance in 3D printing. The experiment demonstrates that the addition of PEG to PEGDA resin enhances its mechanical properties, such as hardness and Young's modulus. Compression tests also show a significant improvement in the compressive modulus of the resin with high loading of PEG. Additionally, cell proliferation experiments indicate that the PEG-loaded resin has higher cell activity. This research highlights the potential biomedical applications of the thermally assisted 3D printed resin and explores printable materials with improved performance.
ADDITIVE MANUFACTURING
(2022)
Article
Engineering, Manufacturing
Ismael Romero-Ocana, Sergio Molina
Summary: 3D printing is a disruptive technology that has attracted considerable attention. In recent years, the search for new materials combining natural resources with 3D printing has become increasingly important. This research reports the feasibility of using waste biomass to develop a new resin composite for 3D printing and investigates its mechanical and thermal properties. The study shows that reducing particle size improves the properties of the composite.
ADDITIVE MANUFACTURING
(2022)
Article
Materials Science, Ceramics
Qinghua Chen, Bin Zou, Qingguo Lai, Yun Zhao, Kaiwen Zhu
Summary: This paper systematically evaluates the curing and interfacial tensile strength of a hydroxyapatite (HAP) printed part fabricated by stereolithography (SLA). It investigates the influence of irradiation parameters on the curing characteristics of HAP paste and establishes a modified critical laser exposure inequation to determine the curing range of HAP paste. The paper also tests and analyzes the influence of irradiation parameters on the interfacial tensile strength of the HAP printed part.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Automation & Control Systems
Lorena Saitta, Giovanni Celano, Gianluca Cicala, Maria Elena Fragala, Giovanna Stella, Matteo Barcellona, Claudio Tosto, Maide Bucolo
Summary: This work presents the use of projection micro-stereolithography (P mu SL) to 3D print a micro-optofluidic device for slug flow detection. A comparison with a poly-dimethylsiloxane (PDMS)-based device was conducted using a novel master-slave 3D printing approach. The optical fiber insertions and absorption phenomenon were utilized for flow detection, showing different light transmission with fluid interference in a micro-channel.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Pauline Blyweert, Vincent Nicolas, Vanessa Fierro, Alain Celzard
Summary: This paper demonstrates the preparation and characteristics of new 3D-printed porous carbons using stereolithography (SLA) and heat treatment. The physical and textural properties of the carbons can be adjusted by using chemically modified biobased aromatic precursors as monomers. These materials show higher thermal stability and carbonyield. The dense porous carbon materials also exhibit outstanding mechanical properties and resistance to oxidation.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Materials Science, Ceramics
He Li, Hamada Elsayed, Paolo Colombo
Summary: Stereolithography based 3D printing is efficient for fabricating alumina ceramics. The mechanical properties of 3D printed alumina ceramics were investigated in this study. The addition of TiO2 increased the flexural strength, but also led to anisotropic behavior. The addition of CaCO3 decreased the shrinkage and flexural strength due to the formation of elongated grains, while the addition of MgO helped decrease anisotropic differences in mechanical properties.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
P. Michaud, V. Pateloup, J. Tarabeux, A. Alzina, D. Andre, T. Chartier
Summary: This study focused on numerically predicting the stiffness of green parts in stereolithography manufacturing processes. Two different approaches, macroscopic and microscopic, were used to establish relationships between exposure and Young's modulus. Both models were able to accurately predict the elastic properties of green parts.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Composites
Ismail Aktitiz, Hulusi Delibas, Alparslan Topcu, Kadir Aydin
Summary: Fe2O3 nanoparticle structures are extensively studied in various application areas due to the compatibility between organic polymers and inorganic Fe2O3 nanoparticles. Nanocomposite structures with desired complexity can be successfully produced using additive manufacturing methods. In this study, Fe2O3 nanoparticles were doped into photocurable resin at different concentrations and printed using stereolithography. The morphological, mechanical, magnetic, and thermal properties of the printed nanocomposites were investigated, and it was found that Fe2O3 nanoparticles improved thermal stability and magnetic properties significantly.
POLYMER COMPOSITES
(2021)
Article
Materials Science, Ceramics
Peter Evans, Griffin Turner, Raj Patel, Mohammadamin Moghadasi, Qirong Yang, Zhijian Pei, Chao Ma, James D. Paramore, Brady G. Butler, Kelvin Y. Xie
Summary: This study used stereolithography to print complex silica honeycomb structures, and the sintering process increased the density and strength of the material. Furthermore, it was found that there were differences in shrinkage and mechanical properties among different directions.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Polymer Science
G. V. Salmoria, G. B. Ghizoni, I. M. Gindri, M. S. Marques, L. A. Kanis
Article
Biophysics
Liliane Pimenta de Melo, Nicola Contessi Negrini, Silvia Fare, Carlos Rodrigo de Mello Roesler, Izabelle de Mello Gindri, Gean Vitor Salmoria
JOURNAL OF APPLIED BIOMATERIALS & FUNCTIONAL MATERIALS
(2019)
Article
Engineering, Mechanical
J. C. R. Albino, L. A. Goncalves Junior, V. E. Beal
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2019)
Article
Engineering, Petroleum
Hugo Santos, Paulo Paz, Igor Kretli, Ney Reis, Hardy Pinto, Mauricio Galassi, Daniel Pozzani, Alessandro Lanzilotta, Bruno Castro, Andre Ferreira, Lincoln Thome, Valter Beal
SPE PRODUCTION & OPERATIONS
(2019)
Article
Mechanics
Paulo Bastos de Castro, Gean Vitor Salmoria, Carlos Rodrigo de Mello Roesler, Edison da Rosa, Eduardo Alberto Fancello
Summary: This research presents a series of experiments and results based on nonhomogeneous compression tests for the polymer PLGA 85/15 to extend the knowledge about the thermomechanical behavior of bioresorbable medical materials. The study explores PLGA strain rate sensitivity, shape-memory properties, heat treatment effects, and residual stress, revealing linear rate-insensitive response for small strains and strong rate dependence for strains beyond yielding. Differential scanning calorimetry and finite element simulations are utilized to provide a comprehensive overview of the mechanical behavior of PLGA.
MECHANICS OF TIME-DEPENDENT MATERIALS
(2021)
Article
Polymer Science
Luciano Pisanu, Leonardo Costa Santiago, Josiane Dantas Viana Barbosa, Valter Estevao Beal, Marcio Luis Ferreira Nascimento
Summary: The study found that increasing the overlap area significantly increased adhesive strength, and temperature and injection flow rate were the key factors in strengthening the bonds of dissimilar materials.
Review
Geosciences, Multidisciplinary
Geovana Pires Araujo Lima, Josiane Dantas Viana Barbosa, Valter Estevao Beal, Marcelo Albano Moret S. Goncalves, Bruna Aparecida Souza Machado, Juliano Zaffalon Gerber, Benjamin S. Lazarus
Summary: Fires can have devastating consequences for structures and living beings globally, making proactive prevention and quick response essential. Research has shown a decrease in fire occurrences and fatalities, but their impact remains significant. Ongoing scientific and technical research is contributing to enhancing safety and fire protection measures.
INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION
(2021)
Article
Materials Science, Biomaterials
Izabelle de Mello Gindri, Lucas Kuth de Azambuja, Michele da Silva Barreto, Dionatha Jose do Prado, Gean Vitor Salmoria, Carlos Rodrigo de Mello Roesler
Summary: The study found that the surface finishing of breast implants affects their physicochemical and mechanical properties, with alkaline environments causing more severe deterioration of mechanical properties. Smooth samples exhibited higher degrees of crosslinking compared to rough samples.
INTERNATIONAL JOURNAL OF BIOMATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Luis Alberto Breda Mascarenhas, Bruna Aparecida Souza Machado, Valter Estevao Beal, Katharine Valeria Saraiva Hodel, Luciana Moreira Nogueira, Thayse Barreto, Sergio Fernandes de Oliveira Jezler, Leonardo Redig Lisboa De Azevedo, Uener Franklyn Teixeira da Silva, Laiane Lopes da Cruz, Lucio Couto de Oliveira Junior, Vinicius Silva Oliveira, Roberto Badaro
Summary: The study evaluated the effectiveness of a bubble device for oxygen supplementation in patients with severe COVID-19, and found that directly applying this device can help most patients overcome hypoxemia and reduce the need for mechanical ventilation.
APPLIED SCIENCES-BASEL
(2022)
Article
Polymer Science
Izabelle de M. Gindri, Lucas K. de Azambuja, Loise S. da Silva, Gean Salmoria, Carlos R. de M. Roesler
Summary: This study proposes a complete experimental plan for the chemical characterization of PMMA-based hip implant centralizers and spacers. The results show the presence of residual monomers with concentrations ranging from 2.27% to 5.79% in these products, and benzoyl peroxide (BPO) was detected in the polymeric structure. The combined results from various analytical techniques demonstrate differences in chemical structure and molecular weight distribution of these products.
Article
Virology
Victor de Carvalho Rodrigues, Iara Zanella Guterres, Beatriz Pereira Savi, Izabella Thais Silva, Gislaine Fongaro, Gean Vitor Salmoria
Summary: In this study, ethylene vinyl acetate (EVA) devices containing different amounts of acyclovir were successfully manufactured using fused filament fabrication technology. The drug was successfully incorporated into the EVA matrix and showed sustained release. Biological assays demonstrated the biocompatibility of the device and a significant reduction in the replication of herpes simplex virus (HSV-1).
Article
Materials Science, Multidisciplinary
Tatiane Michele Popiolski, Markus Wilimzig, Valdir Soldi
Summary: This study evaluated the antibacterial activity of textile fibers containing nanoparticles and essential oils, showing potential effectiveness against Staphylococcus aureus. The composition of nanoparticles, including morphology, encapsulation efficiency, and release kinetics, as well as the arrangement of fibers in textiles, all play a role in determining antibacterial activity.
MATERIA-RIO DE JANEIRO
(2021)
Article
Polymer Science
Loise Silveira da Silva, Izabelle de Mello Gindri, Gean Vitor Salmoria, Carlos Rodrigo de Mello Roesler
POLIMEROS-CIENCIA E TECNOLOGIA
(2020)
Article
Materials Science, Multidisciplinary
Lya Piaia, Gean Vitor Salmoria, Dachamir Hotza
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Mariele P. Sanches, Idejan P. Gross, Rodrigo H. Saatkamp, Alexandre L. Parize, Valdir Soldi
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
(2020)