Preparation and performance of ultraviolet curable silicone resins used for ultraviolet cured coating and ultraviolet-assisted 3D printing materials

Health monitoring sensors that are attached to clothing are a new trend of the times, especially stretchable sensors for human motion measurements or biological markers. However, price, durability, and performance always are major problems to be addressed and three-dimensional (3D) printing combined with conductive flexible materials (thermoplastic polyurethane) can be an optimal solution. Herein, we evaluate the effects of 3D printing-line directions (45°, 90°, 180°) on the sensor performances. Using fused filament fabrication (FDM) technology, the sensors are created with different print styles for specific purposes. We also discuss some main issues of the stretch sensors from Carbon Nanotube/Thermoplastic Polyurethane (CNT/TPU) and FDM. Our sensor achieves outstanding stability (10,000 cycles) and reliability, which are verified through repeated measurements. Its capability is demonstrated in a real application when detecting finger motion by a sensor-integrated into gloves. This paper is expected to bring contribution to the development of flexible conductive materials—based on 3D printing.

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3D Printable Resources for Engaging STEM Students in Laboratory Learning Activities and Outreach Programs: Inexpensive and User-Friendly Instrument Kits for Educators

MRS Advances ◽

10.1557/adv.2018.441 ◽

2018 ◽

Vol 3 (49) ◽

pp. 2937-2942 ◽

Cited By ~ 1

Author(s):

Lon A. Porter

Keyword(s):

3D Printing ◽

Mathematics Learning ◽

Digital Design ◽

Outreach Programs ◽

Stem Students ◽

3D Printed ◽

Design Software ◽

And Performance ◽

And Mathematics ◽

User Friendly

ABSTRACTContinued advances in digital design software and 3D printing methods enable innovative approaches in the development of new educational tools for laboratory-based STEM (science, technology, engineering and mathematics) learning. The decreasing cost of 3D printing equipment and greater access provided by university fabrication centers afford unique opportunities for educators to transcend the limitations of conventional modes of student engagement with analytical instrumentation. This work shares successful efforts at Wabash College to integrate user-friendly and inexpensive 3D printed instruments kits into introductory STEM coursework. The laboratory kits and activities described provide new tools for engaging students in the exploration of instrument design and performance. These experiences provide effective ways to assist active-learners in discovering the technology and fundamental principles of analysis and deliberately confront the “black box” perception of instrumentation.

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Performance Oriented Design of Semiregular Anisotropic Porous Structures

Volume 2A: 44th Design Automation Conference ◽

10.1115/detc2018-85928 ◽

2018 ◽

Author(s):

Chao Xu ◽

Lili Pan ◽

Ming Li ◽

Shuming Gao

Keyword(s):

3D Printing ◽

Porous Materials ◽

Design Problem ◽

Degrees Of Freedom ◽

Design Space ◽

Manufacturing Technology ◽

Porous Structures ◽

Precise Control ◽

And Performance

Porous materials / structures have wide applications in industry, since the sizes, shapes and positions of their pores can be adjusted on various demands. However, the precise control and performance oriented design of porous structures are still urgent and challenging, especially when the manufacturing technology is well developed due to 3D printing. In this study, the control and design of anisotropic porous structures are studied with more degrees of freedom than isotropic structures, and can achieve more complex mechanical goals. The proposed approach introduces Super Formula to represent the structural cells, maps the design problem to an optimal problem using PGD, and solves the optimal problem using MMA to obtain the structure with desired performance. The proposed approach is also tested on the performance of the expansion of design space, the capture of the physical orientation and so on.

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3D Printing: Additive Manufacturing and Performance of Architectured Cement-Based Materials (Adv. Mater. 43/2018)

Advanced Materials ◽

10.1002/adma.201870326 ◽

2018 ◽

Vol 30 (43) ◽

pp. 1870326

Author(s):

Mohamadreza Moini ◽

Jan Olek ◽

Jeffrey P. Youngblood ◽

Bryan Magee ◽

Pablo D. Zavattieri

Keyword(s):

Additive Manufacturing ◽

3D Printing ◽

Cement Based Materials ◽

And Performance

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UV-curing kinetics and performance development of in situ curable 3D printing materials

European Polymer Journal ◽

10.1016/j.eurpolymj.2017.05.041 ◽

2017 ◽

Vol 93 ◽

pp. 140-147 ◽

Cited By ~ 17

Author(s):

Ye Chan Kim ◽

Sungyong Hong ◽

Hanna Sun ◽

Myeong Gi Kim ◽

Kisuk Choi ◽

...

Keyword(s):

3D Printing ◽

Uv Curing ◽

Curing Kinetics ◽

Performance Development ◽

And Performance

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Design and characterization of a 3D-printed staggered herringbone mixer

BioTechniques ◽

10.2144/btn-2021-0009 ◽

2021 ◽

Author(s):

Vedika J Shenoy ◽

Chelsea ER Edwards ◽

Matthew E Helgeson ◽

Megan T Valentine

Keyword(s):

3D Printing ◽

High Throughput ◽

Low Cost ◽

Microfluidic Devices ◽

Device Design ◽

Replica Molding ◽

3D Printed ◽

And Performance ◽

To Receive

3D printing holds potential as a faster, cheaper alternative compared with traditional photolithography for the fabrication of microfluidic devices by replica molding. However, the influence of printing resolution and quality on device design and performance has yet to receive detailed study. Here, we investigate the use of 3D-printed molds to create staggered herringbone mixers (SHMs) with feature sizes ranging from ∼100 to 500 μm. We provide guidelines for printer calibration to ensure accurate printing at these length scales and quantify the impacts of print variability on SHM performance. We show that SHMs produced by 3D printing generate well-mixed output streams across devices with variable heights and defects, demonstrating that 3D printing is suitable and advantageous for low-cost, high-throughput SHM manufacturing.

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Experimental Investigation of Fluid-Particle Interaction in Binder Jet 3D Printing

10.20944/preprints202101.0546.v1 ◽

2021 ◽

Author(s):

Joshua J. Wagner ◽

Hang Shu ◽

Rahul Kilambi

Keyword(s):

3D Printing ◽

High Speed ◽

Capillary Flow ◽

Experimental Testing ◽

Particle Interaction ◽

Fluid Particle ◽

Short Time Scale ◽

Energy Applications ◽

And Performance ◽

Critical Components

Wide-scale adoption of binder jet 3D printing for mission-critical components in aerospace, biomedical, defense, and energy applications requires improvement in mechanical properties and performance characteristics of end-use components. Increased fidelity may be achieved with better understanding of the interfacial physics and complex fluid-particle interactions fundamental to the process. In this work, an experimental testing apparatus and procedure is developed to investigate the fluid and particle dynamics occurring upon impact of jetted binder droplets onto a powder bed. High-speed, microscopic imaging is employed to capture short time-scale phenomena such as ballistic particle ejection, capillary flow, and particle clustering. The effects of different process parameters (e.g., translational printhead velocity, jetting frequency, and impact velocity) on the dynamics of Inconel powder are studied. These experiments reveal that the fluid-particle interaction is significantly affected by a combination of printing parameters, ultimately governing the quality and performance of binder jet 3D printed components.

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Preparation and performance evaluation of silica gel/tricalcium silicate composite slurry for 3D printing

Journal of Non-Crystalline Solids ◽

10.1016/j.jnoncrysol.2018.10.022 ◽

2019 ◽

Vol 503-504 ◽

pp. 334-339 ◽

Cited By ~ 3

Author(s):

Wenzheng Wu ◽

Wei Liu ◽

Jili Jiang ◽

Jinrong Ma ◽

Guiwei Li ◽

...

Keyword(s):

Performance Evaluation ◽

3D Printing ◽

Silica Gel ◽

Tricalcium Silicate ◽

And Performance ◽

Composite Slurry

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Preparation and Performance of Photosensitive Epoxy Acrylate Modified by N-[(4-Bromo-3,5-Difluoro) Phenyl]acrylamide

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.357-360.1224 ◽

2013 ◽

Vol 357-360 ◽

pp. 1224-1228

Author(s):

Xin Ding Yao ◽

Rui Na Fang ◽

Hong Jian Pang ◽

Peng Cui ◽

Guo Ji Liu

Keyword(s):

Tensile Strength ◽

Acrylic Acid ◽

Residual Carbon ◽

Epoxy Acrylate ◽

H Nmr ◽

Graft Modification ◽

Cured Coating ◽

And Performance

After the 4-bromo-3,5-difluorophenyl acrylamide (BDPA) and acrylic acid were introduced into the epoxy acrylate (EA), the photosensitive epoxy acrylate (EFBDPA) with good performance was prepared through chemical graft modification. The structure of EFBDPA was confirmed by FTIR and1H-NMR. When the content of BDPA in EFBDPA was 20%, the cured coating of EFBDPA had better performance than the unmodified EA cured coating, its tensile strength, 80 % decomposition temperatures and the residual carbon ratio were improved 86%, 5.7 °C and 4.2 %, respectively.

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