Review
Materials Science, Multidisciplinary
Aljawharah A. Alsharif, Nataly S. S. Milan Cucuri, Rishabh B. Mishra, Nazek El-Atab
Summary: 3D printed on-skin electrodes have advantages over traditional wet electrodes such as personalization and the use of different materials with distinct properties. Dry electrodes also eliminate the need for electrolyte gel. However, challenges arise in optimizing performance, especially when scaling down the electrodes. This review provides a reference guide on 3D printing techniques and materials for dry EP electrodes and biosignal sensing methodologies.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Analytical
Adele Tong, Praneeth Perera, Zhanna Sarsenbayeva, Alistair McEwan, Anjula C. De Silva, Anusha Withana
Summary: This study investigates the feasibility of 3D printing EEG electrodes using a low-cost setup and a conductive filament called Multi3D Electrifi. The results show that the printed electrodes have contact impedance under 550 O and phase change smaller than -30° for frequencies ranging from 20 Hz to 10 kHz. The study also demonstrates that the printed electrodes can identify alpha activity in a functional test.
Article
Chemistry, Multidisciplinary
Chohei Pang, Jae-Kang Kim, Yingdan Wu, Michael Yu, Hongyu Yu, Metin Sitti
Summary: This study presents an elastomeric microstructure that overcomes the trade-off between adhesive strength and trigger force. The optimal design exhibits strong adhesive strength and negligible detachment strength, even in wet conditions. Manipulation tasks of fragile and tiny parts as well as transfer across water and air interfaces are successfully demonstrated.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jun Qian, Ruimin Xiao, Fan Su, Mengna Guo, Dagang Liu
Summary: This study explores a new printing ink for polyvinyl formate (PVFm) that can be coagulated by water and mold to fabricate 3D elastic structures. Wearable flexible electronic sensors were fabricated by coating PVFm with polypyrrole (PPy) through in-situ polymerization. The resistance changes and sensitivity of PPy@PVFm in monitoring physical strain and pressure were characterized.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Review
Food Science & Technology
Vijayakumar Raja, Shubham Nimbkar, Jeyan Arthur Moses, Sinija Vadakkepulppara Ramachandran Nair, Chinnaswamy Anandharamakrishnan
Summary: Food 3D printing is an advanced technology that transforms foods into customized forms. Modeling methods are used to simulate the mechanical behavior, texture modification, and stability evaluation of the printing process, as well as assist in the design of 3D printers. There are opportunities for expanding research in this field, particularly in computational and data-driven dynamic simulation approaches.
Review
Materials Science, Multidisciplinary
Lucas S. S. Ribeiro, Vitor M. Gaspar, Rita Sobreiro-Almeida, Emerson R. R. Camargo, Joao F. Mano
Summary: Granular inks composed of jammed hydrogel unit building blocks have become a versatile precursor for 3D/4D printing of nonbulk hydrogel constructs. These inks, along with their injectability, possess high porosity compared to bulk hydrogels, allowing efficient nutrient transport and cell migration. This review illustrates the key steps in the ink production, from microgel fabrication, jamming process, to the influence of fabrication on material properties. It also discusses the techniques for scaffold stabilization and cell viability assessment. Furthermore, recent studies on the biomedical applications of granular hydrogels are highlighted, indicating their potential as stimuli-responsive platforms.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Biochemistry & Molecular Biology
Waleed Ahmed, Ali H. Al-Marzouqi, Muhammad Hamza Nazir, Tahir A. Rizvi, Essam Zaneldin, Mushtaq Khan
Summary: Due to COVID-19 pandemic, novel strategies to combat pathogens are on the rise worldwide. This research investigates an antimicrobial polymeric PLA-based composite material enhanced with different microparticles. Results showed that the sample prepared with 90% copper and 10% PLA exhibited the best antibacterial activity, making it a sustainable solution for various applications.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Review
Environmental Sciences
Heike Romanowski, Frank S. Bierkandt, Andreas Luch, Peter Laux
Summary: This review of 50 studies on 3D printing with the material extrusion method summarizes that higher printing temperature leads to higher emissions, styrene is the main volatile organic compound emitted during ABS printing, released particles are in the nano range, and filaments with additives could pose health risks. In vivo and in vitro studies show toxic effects. Therefore, it is recommended to print in a well-ventilated area, use the lowest possible print temperature, and be cautious with filaments containing particulate additives.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Materials Science, Multidisciplinary
Ryan Kaveh, Natalie Tetreault, Karthik Gopalan, Julian Maravilla, Michael Lustig, Rikky Muller, Ana C. Arias
Summary: A method for producing low impedance dry electrodes without the need for hydrogels is presented. The electrodes are optimized for individual use using electroless copper and gold plating with 3D printing. Compared to clinical-standard devices, these dry electrodes exhibit good electrical performance and comfort.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Geochemistry & Geophysics
Shinan Lang, Mingzhu Yang, Xiangbin Cui, Lin Li, Yiheng Cai, Xiaojun Liu, Jingxue Guo, Bo Sun, Martin Siegert
Summary: In this study, a semiautomatic method is proposed to predict basal dry-wet distributions in glaciated regions, which improves accuracy by correcting identification thresholds and automatically identifying dry-wet transitions.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Materials Science, Multidisciplinary
Xiaohui Song, Zihao Ou, Xiaosong Hu, Xingyu Zhang, Ming Lin, Liaoyong Wen, Mufan Li
Summary: Wet chemical etching has been used to prepare porous metal-organic framework (MOF) particles, with the pH value of the etching solution serving as a controllable parameter to vary the types of porous ZIF-8 particles observed. The 3D electron tomography technique was applied to analyze the porous ZIF-8 particles and reveal their structural properties. The study demonstrates the potential of wet chemical etching and 3D tomography technique in understanding and designing functional porous materials.
ACS MATERIALS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Akash Garg, Saigopalakrishna S. Yerneni, Phil Campbell, Philip R. LeDuc, O. Burak Ozdoganlar
Summary: This work introduces a freeform 3D ice printing process that allows for high-speed and reproducible fabrication of ice structures with micro-scale resolution. The dimension and geometry of the structures are controlled through modulation of droplet ejection frequency and stage motions. This method enables the creation of complex geometries, overhang structures, smooth surfaces, and micro-scale features.
Article
Polymer Science
Maria Jose Paternina Reyes, Jimy Unfried Silgado, Juan Felipe Santa Marin, Henry Alonso Colorado Lopera, Luis Armando Espitia Sanjuan
Summary: This study assessed the potential use of cashew nutshells from the northern region of Colombia as a filler in polymer matrix filaments for 3D printing. The characterization of the cashew nutshells revealed rough and porous particles composed of cellulose microfibrils embedded in a hemicellulose and lignin matrix. These characteristics improve the filler-matrix adhesion in polymer matrix composites. Furthermore, the low density of the cashew nutshell particles makes them attractive for lightweight applications. The filaments prepared with the cashew nutshell particles showed higher tensile strength and elongation at break compared to the pure polymer filaments.
Article
Chemistry, Physical
Shiva Naseri, Megan E. Cooke, Derek H. Rosenzweig, Maryam Tabrizian
Summary: Tooth sensitivity is a common and painful problem that can be treated by blocking dentin microtubules, but current testing methods are limited by difficulties in accessing raw materials. Thus, there is a need to develop an in vitro dentin model to evaluate the effectiveness of occlusive agents.
Article
Environmental Sciences
Md Mahmudun Nabi, Jingjing Wang, Erfan Goharian, Mohammed Baalousha
Summary: The study aimed to investigate the temporal variability of TiO2 engineered particle concentrations in the Broad River, Columbia, South Carolina, United States and found that following storm events, flow discharge, bulk elemental concentrations, TiO2 engineered particle concentration, and turbidity displayed the same rise and fall trend. Additionally, linear relationships were established between turbidity and TiO2 engineered particle concentrations.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Chemical
Jun Zhang, Negin Amini, David A. V. Morton, Karen P. Hapgood
Summary: The study investigates the printing of powder granules using binder jetting technique, exploring the influence of different parameters on granule strength and surface roughness through structural property characterization. By establishing the relationship between print settings, structure, and strength, it demonstrates the potential for AM powder granules with controlled strengths to serve as ideal calibration particles for various industrial applications.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Materials Science, Biomaterials
Cian Vyas, Jun Zhang, Oystein Ovrebo, Boyang Huang, Iwan Roberts, Mohan Setty, Benjamin Allardyce, Havard Haugen, Rangam Rajkhowa, Paulo Bartolo
Summary: Polycaprolactone (PCL) scaffolds have been enhanced by incorporating Bombyx mori silk microparticles (SMP) as a reinforcing agent, showing improved mechanical properties and interconnectivity. The addition of SMP increased shear thinning and storage modulus, while enhancing cell behaviors such as proliferation and migration. The study demonstrates the potential suitability of SMP-reinforced PCL scaffolds for bone tissue engineering applications.
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
(2021)
Article
Engineering, Manufacturing
Jun Zhang, Benjamin J. Allardyce, Rangam Rajkhowa, Xungai Wang, Xin Liu
Summary: This study describes the development of a 3D printing formulation using silk powder compatible with Binder Jetting. The relationship between precursor powder properties and printability was investigated, leading to the successful printing of intricate structures with good mechanical properties. The post-crosslinking method enhanced water stability, making the printed parts suitable for potential biomedical applications.
ADDITIVE MANUFACTURING
(2021)
Article
Pharmacology & Pharmacy
Shishir Shekhar, Negin Amini, David A. Morton, Karen P. Hapgood, Alexander Russell
Summary: Simulation using DEM enhances understanding of single-particle interactions in pharmaceutical unit operations, aiding in mitigating challenges during formulation and process development with minimal use of active drug material. This study highlights the potential of DEM for a rapid preliminary assessment of mechanistic attributes in tablet and capsule drug products based on MUPS.
Article
Engineering, Chemical
Jun Zhang, Josh Tuohey, Negin Amini, David A. Morton, Karen P. Hapgood
Summary: This study used artificial models to represent porous particle beds and found that the porous structure has a more significant effect on liquid capillary rise than material surface wettability. The experimental results also pave the way for a new production method for reproducible models of irregular powder beds.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Engineering, Chemical
Rechana Remadevi, David A. Morton, Karen Hapgood, Nigar Rashida, Rangam Rajkhowa
Summary: In this study, a novel approach to engineer silk into composite micro-sized particles was described. The combination of wet milling and homogenization followed by co-spray drying with L-leucine was used. The results showed that the co-spray dried silk powders had modified bulk properties and the level of L-leucine addition affected their behavior. Furthermore, the co-spray drying process reduced the cohesiveness and improved the stability and flowability of the silk powders.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Engineering, Chemical
Negin Amini, Josh Tuohey, John M. Long, Jun Zhang, David A. Morton, Karen E. Daniels, Farnaz Fazelpour, Karen P. Hapgood
Summary: The study presents a method combining X-ray computed tomography, 3D printing, and traditional photoelastic analysis for visualizing strain in complex particles. Different types of particles were analyzed, ranging from simple discs to 3D-printed coffee beans with internal voids. The relative orientation of print layers and loading force can influence the optical response of the particles without affecting their mechanical properties. Furthermore, a semi-quantitative measurement method for generated stresses within 3D-printed complex particles is introduced.
Article
Engineering, Chemical
A. Antic, J. Zhang, N. Amini, D. A. V. Morton, K. P. Hapgood
Summary: Binder jetting is an additive manufacturing technique that is used in various industries, including pharmaceuticals, and has the potential to create new products. However, there are limitations and challenges in terms of powder technology expertise and 3D printing processes that need to be addressed in order to optimize the use of this technique.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Engineering, Chemical
Yongxiang Wu, Nguyen Thi Hong Nhung, Deqian Zeng, Nengneng Luo, Akira Otsuki, Gjergj Dodbiba, Toyohisa Fujita
Summary: This study proposed a novel method for synthesizing flower-like vaterite calcium carbonate using nanobubble-containing ethanol and water mixed solution as the solvent and discussed the formation mechanism of vaterite with different shapes. The synthesized vaterite has significant practical interest in the integrated treatment of wastewater contaminated by heavy metals with effective Cd(II) removal, providing a promising field for studying heavy metal and pollutant adsorption in the liquid phase.
ADVANCED POWDER TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jian Gong, Lipo Cheng, Ming Liu, Jie Jiang, Xiaoduo Ou
Summary: This study investigates the effects of particle shape on the collapse of granular columns using the discrete element method. The results show that particle shape has a significant impact on deposition morphology, energy evolution, and mechanical coordination number. Sphericity and angularity are identified as the most important macroscale factors, while roughness has a weaker microscale influence.
ADVANCED POWDER TECHNOLOGY
(2024)
