Article
Engineering, Mechanical
Shamsher Singh, Abhas Jain, Prachi Chaudhary, Rishabh Gupta, Harlal Singh Mali
Summary: This paper investigates the dimensional accuracy and surface roughness of printed masked stereolithography (m-SLA) parts. The study examines the influence of four process parameters - layer height, exposure time, light-off delay, and print orientation - on the shrinkage of different geometrical dimensions and the surface roughness of the parts. It is found that the layer height and print orientation affect the surface roughness, while the dimensional accuracy is influenced by layer height, exposure time, and print orientation. The light-off delay has little impact on dimensional accuracy and surface roughness but can affect printing time.
RAPID PROTOTYPING JOURNAL
(2023)
Article
Polymer Science
Aishabibi Mukhangaliyeva, Damira Dairabayeva, Asma Perveen, Didier Talamona
Summary: Rapid investment casting utilizes additive manufacturing to create sacrificial patterns, enabling advanced designs. This study explores the impact of stereolithography printing parameters on dimensional accuracy and surface roughness, finding optimal parameters for both.
Article
Engineering, Manufacturing
Zhongwei Yu, Xinghong Deng, Jing Qiao, Dekai Zhou, Longqiu Li
Summary: This study investigates the factors influencing the shape accuracy of microcantilever structures in PSL process through orthogonal tests. It finds that microcantilever structures with confined size can be directly and accurately manufactured using optimized processing parameters, which improves manufacturing efficiency and reliability.
3D PRINTING AND ADDITIVE MANUFACTURING
(2022)
Article
Crystallography
Cheng Wen, Zhengda Chen, Zhuoxi Chen, Bin Zhang, Zhicheng Cheng, Hao Yi, Guiyun Jiang, Jigang Huang
Summary: This study proposes a compensation method based on structure optimization to improve the geometric accuracy of projection stereolithography 3D printing for microstructures. The performance of the method is verified through simulation and experiments, showing significant improvements in shape and dimension accuracy.
Article
Materials Science, Multidisciplinary
Abdurrahim Temiz
Summary: The study aims to examine the effect of printing method on the mechanical characteristics and printing time of test specimens. It also aims to optimize the printing procedure to maximize ultimate tensile strength while minimizing printing time. The research used a MSLA printer to manufacture standard gray resin specimens and applied response surface methodology to investigate process variables and identify the ideal printing procedure.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Engineering, Biomedical
Anastasiia Grymak, Abdelrahman Badarneh, Sunyoung Ma, Joanne Jung Eun Choi
Summary: The study aims to compare and measure the accuracy of 3D-printed materials used for RPD production to improve workflow and eliminate errors in manufacturing. Different types of resin and printing parameters were used, and their accuracy and discrepancies were compared. The results showed that a build angle of 45 degrees and a printing layer thickness of 50-100 μm achieved clinically acceptable accuracy. The highest discrepancies were observed in posterior clasps, while the lowest discrepancy was found in palatal straps.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jingyi Chen, Ruyue Su, Xiaofei Zhai, Yaru Wang, Xiong Gao, Xueqin Zhang, Yanpeng Zhang, Yan Zhang, Sheng Liu, Rujie He
Summary: This study successfully addressed the key issue of mismatching between curing thickness and slice thickness in the stereolithography of ceramic microcomponents by adding a photoabsorber. It resulted in the preparation of microcomponents that meet the design requirements.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
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, Manufacturing
Fucheng Zhang, Kai Cao, Ahmadreza Zaeri, Ralf Zgeib, Robert C. Chang
Summary: This article introduces an effective index and evaluation protocol for evaluating the printing accuracy of melt electrowriting (MEW), and investigates the impact of scaffold design parameters on the printing accuracy. Experimental results show that fiber diameter, inter-fiber distance, and layer number significantly affect the printing accuracy. Additionally, the interaction between fiber diameter and inter-fiber distance also influences the printing accuracy.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Chemistry, Analytical
Sophia N. Economidou, Cristiane P. Pissinato Pere, Michael Okereke, Dennis Douroumis
Summary: This work focuses on the optimization of 3D-printed microneedles, exploring the key relationships between design and manufacturing parameters and quality and performance. It was demonstrated that microneedle geometry affects behavior and drug delivery efficiency.
Article
Engineering, Manufacturing
Roberto Bernasconi, Davood Hatami, Hossein Nouri Hosseinabadi, Valentina Zega, Alberto Corigliano, Raffaella Suriano, Marinella Levi, Giacomo Langfelder, Luca Magagnin
Summary: Additive manufacturing has gained attention in the field of electro-mechanical devices due to its high process flexibility, improved product customizability, and the ability to fabricate three-dimensional mechanical structures. This study successfully produced and experimentally verified a functional accelerometer using additive manufacturing techniques, demonstrating a promising route for the fabrication of electro-mechanical sensors at the mesoscale.
ADDITIVE MANUFACTURING
(2022)
Article
Materials Science, Multidisciplinary
Reymark D. Maalihan, Qiyi Chen, Hiroshi Tamura, Joseph Rey H. Sta Agueda, Bryan B. Pajarito, Eugene B. Caldona, Rigoberto C. Advincula
Summary: This study demonstrates the fabrication of photocurable resin nanocomposites containing chitin nanowhiskers through 3D printing technology, and shows their improved mechanical and thermal properties. These materials have great potential for various industrial applications.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Engineering, Industrial
Y. X. Yu, Y. Huang, H. H. Geng, L. L. Cha
Summary: This paper studied the impact of variables on stamping quality of spring-seat through simulation, optimized them using response surface methodology, and ultimately met the quality requirements of the product.
INTERNATIONAL JOURNAL OF SIMULATION MODELLING
(2022)
Article
Engineering, Multidisciplinary
Yanhe Liu, Jianbo Zhou, Wansi Fu, Bin Zhang, Feihu Chang, Pengfei Jiang
Summary: This study optimized diamond cutting tools for bamboo cutting using response surface methodology and found that feed speed has a significant impact on surface roughness. The best cutting combination can achieve better surface quality.
Article
Engineering, Mechanical
Mohamad Nordin Mohamad Norani, Mohd Fadzli Bin Abdollah, Muhammad Ilman Hakimi Chua Abdullah, Hilmi Amiruddin, Faiz Redza Ramli, Noreffendy Tamaldin
Summary: This study analyzed the coefficient of friction and wear properties of acrylonitrile butadiene styrene polymer through optimizing 3D printing parameters, finding that layer height has the most significant impact on coefficient of friction and wear rate.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2021)
Article
Chemistry, Physical
Nicholas T. Dee, Martin Schneider, Dmitri N. Zakharov, Piran R. Kidambi, A. John Hart
Summary: This study utilizes high-resolution, high-rate video capture of ETEM experimentation and automated image processing to quantitatively analyze particle formation and nucleation efficiency in CNT synthesis. The results show that pretreating the catalyst with carbon in a hydrogen atmosphere significantly improves particle density, CNT nucleation efficiency, and CNT density. Adding carbon during exposure to hydrogen is more effective than NH3 in increasing CNT nucleation efficiency, despite NH3 being a stronger reducing agent for iron. The insights from this study are important for improving CNT yield and productivity.
Article
Materials Science, Paper & Wood
Abhinav Rao, Thibaut Divoux, Crystal E. Owens, A. John Hart
Summary: This study presents the formulation and processing of crosslinked cellulose nanocrystal (CNC)-epoxy composites with a CNC fraction exceeding 50 wt%. The microstructure of the composites resembles the lamellar structure of nacre, combining bulk ductility with the brittle behavior of the aggregates at the nanoscale. The resulting composites exhibit high hardness and fracture toughness, making them suitable for various applications in the field of nanocomposites.
Article
Chemistry, Multidisciplinary
Cecile A. C. Chazot, Behzad Damirchi, Byeongdu Lee, Adri C. T. van Duin, A. John Hart
Summary: Molecularly organized nanocomposites of polymers and carbon nanotubes show great promise as high-performance materials. However, achieving controllable interaction between the polymer and carbon nanotubes remains a challenge. In this study, the researchers successfully coated carbon nanotubes with a conformal coating of meta-aramid, providing insights for future investigation of the mechanical properties of these composites and the application of in situ polymerization to other substrates.
Article
Engineering, Chemical
Daniel Oropeza, Ryan W. Penny, Daniel Gilbert, A. John Hart
Summary: This study demonstrates the use of a precision, mechanized powder spreading testbed coupled with transmission x-ray imaging for spatially-resolved, non-contact powder layer density measurements. The influence of several variables on the spreading of aluminum oxide powders is studied, including powder size and shape, spreading tool choice, traverse speed, and powder dispensing methodology. The findings show that these factors have an impact on the layer density of the spread powder.
Article
Engineering, Manufacturing
Daniel Oropeza, Ricardo Roberts, A. John Hart
Summary: Binder jet additive manufacturing (BJAM) allows processing of various materials by depositing binding agent onto a powder bed layer by layer. This paper presents a process for developing custom binder inks, showcasing the capability to control jetting behavior through rheological modifications and improve green strength through reactive binders. Through this process, rapid sampling of binders can be performed, providing a powerful tool for control of densification and warping in the future.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Engineering, Manufacturing
Suh In Kim, A. John Hart
Summary: In laser powder bed fusion (LPBF) additive manufacturing, a new spiral pattern is proposed based on an analogy between natural predator-prey behavior and heat flow. The spiral pattern shows potential for reducing temperature variation and maintaining a larger heated area compared to traditional zig-zag and helix scan patterns. This pattern could be important for printing crack-prone materials and optimizing LPBF parameters.
VIRTUAL AND PHYSICAL PROTOTYPING
(2022)
Review
Chemistry, Multidisciplinary
M. A. S. R. Saadi, Alianna Maguire, Neethu T. Pottackal, Md Shajedul Hoque Thakur, Maruf Md Ikram, A. John Hart, Pulickel M. Ajayan, Muhammad M. Rahman
Summary: Direct ink writing (DIW) is a versatile 3D printing technique that allows printing of a wide range of materials. This comprehensive review explores the process of DIW printing of complex 3D structures and discusses its diverse applications in various industries.
ADVANCED MATERIALS
(2022)
Review
Food Science & Technology
Camila A. Palla, Martina Dominguez, Maria Elena Carrin
Summary: Monoglyceride (MG)-based oleogelation is an effective strategy to replace or reduce trans and saturated fats, and develop products with improved properties. Manipulating process parameters allows for customization of oleogel characteristics. Ultrasound technologies and optimization methods are tools for producing oleogels with targeted properties.
COMPREHENSIVE REVIEWS IN FOOD SCIENCE AND FOOD SAFETY
(2022)
Article
Chemistry, Applied
Camila A. Palla, Aixa Aguilera-Garrido, Maria Elena Carrin, Francisco Galisteo-Gonzalez, Maria Jose Galvez-Ruiz
Summary: This study successfully loaded curcumin into monoglyceride (MG) oleogels and produced stable gelled-oil nanoemulsions. The effects of ultrasonication processing parameters and formulation on particle size and stability were evaluated, and a surfactant mixture of Pluronic F-68 and Tween 80 with a low oleogel/aqueous phase ratio produced the most stable nanoemulsions. The results also showed that structuring oil particles with MG crystals can enhance the encapsulation efficiency of curcumin and slow down its release.
Article
Engineering, Chemical
William J. Sawyer, A. John Hart
Summary: The size and composition of nanoparticles are crucial for catalytic processes. This study focuses on the controlled synthesis of sub-3 nm iron nanoparticle aerosols and the mechanisms behind their growth. By using a custom-built atmospheric pressure DC microplasma reactor, the researchers were able to achieve precise diameter control and high yield of the nanoparticles. A charge-mediated formation mechanism was proposed to explain the growth process, although it couldn't fully explain the observed rapid growth rate. This research is important for optimizing nanoparticle yield, throughput, and diameter control.
JOURNAL OF AEROSOL SCIENCE
(2022)
Review
Chemistry, Applied
Camila A. Palla, Martina Dominguez, Maria Elena Carrin
Summary: Monoglyceride oleogels are novel fat materials designed to reduce saturated fats and eliminate trans fats, while offering various technological functionalities and health-promoting systems. Recent research has explored their applications as carriers of bioactive compounds and for modulating lipid digestion.
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY
(2022)
Article
Chemistry, Applied
Anabella S. Giacomozzi, Maria E. Carrin, Camila A. Palla
Summary: This study compared muffins made with a monoglyceride oleogel to those made with commercial margarine, and found that the oleogel-based muffin scored higher in appearance and color, and was preferred by consumers overall. The reformulated muffins also had a significantly improved lipid profile, with a reduction in saturated fats and an increase in monounsaturated fats. The study supports the use of monoglyceride oleogels for healthier bakery products and may help accelerate the transition from conventional solid fats to oleogels in the food industry.
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY
(2023)
Article
Engineering, Mechanical
Kaitlyn Gee, Suh In Kim, Haden Quinlan, A. John Hart
Summary: This study presents a framework to estimate the throughput and cost of additive manufacturing (AM). The framework takes into account process parameters, material thermodynamic properties, and machine specifications. The study also analyzes the tradeoff between production cost and machine capability, providing insights beyond the limits of current commercially available equipment.
RAPID PROTOTYPING JOURNAL
(2023)
Article
Engineering, Chemical
M. Itati De Salvo, Camila A. Palla, Ivana M. Cotabarren
Summary: The purpose of this study was to examine the effects of extruded material amount, extruder movement speed, and build platform temperature on the properties of nutraceutical oral solid forms produced by 3D printing using a combination of monoglyceride oleogels and phytosterols. The weight of the solid forms was influenced by the amount of extruded material, with a 30% decrease resulting in a 30% lighter form. Solid forms with desired dimensions and high self-supporting capacity were obtained at low build platform temperature and extruder movement speed settings (8 degrees C and 1 mm/s, respectively). The hardness of the solid forms was significantly affected by the build platform temperature, decreasing by 37% when the temperature increased from 8 to 20 degrees C. This study highlights the importance of evaluating printing process parameters in the development of products using 3D printing.
JOURNAL OF FOOD ENGINEERING
(2023)