scholarly journals Stereolithography 3D-Printed Catalytically Active Devices in Organic Synthesis

Catalysts ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 109 ◽  
Author(s):  
Sergio Rossi ◽  
Alessandra Puglisi ◽  
Laura Maria Raimondi ◽  
Maurizio Benaglia
Keyword(s):  
Low Cost ◽  
Reaction Times ◽  
3D Printer ◽  
High Reproducibility ◽  
Active Devices ◽  
Surface Areas ◽  
Catalytically Active ◽  
3D Printed ◽  
Different Shapes ◽  
Design Software

This article describes the synthesis of stereolithography (SLA) 3D-printed catalyst-impregnated devices and their evaluation in the organocatalyzed Friedel–Crafts alkylation of N–Me–indole with trans-β-nitrostyrene. Using a low-cost SLA 3D printer and freeware design software, different devices were designed and 3D-printed using a photopolymerizable resin containing a thiourea-based organocatalyst. The architectural control offered by the 3D-printing process allows a straightforward production of devices endowed with different shapes and surface areas, with high reproducibility. The 3D-printed organocatalytic materials promoted the formation of the desired product up to a 79% yield, although with longer reaction times compared to reactions under homogeneous conditions.

scholarly journals Flexible 3D Printed Molds for Educational Use. Digital Fabrication of 3D Typography

2019 ◽  
Vol 15 (13) ◽  
pp. 4 ◽  
Author(s):  
Alejandro Bonnet De León ◽  
Jose Luis Saorin ◽  
Jorge De la Torre-Cantero ◽  
Cecile Meier ◽  
María Cabrera-Pardo
Keyword(s):  
3D Modeling ◽  
Low Cost ◽  
Digital Fabrication ◽  
3D Printer ◽  
School Environments ◽  
Flexible Material ◽  
Educational Environments ◽  
3D Printers ◽  
3D Printed ◽  
The Subject

<p class="0abstract"><span lang="EN-US">One of the drawbacks of using 3D printers in educational environments is that the creation time of each piece is high and therefore it is difficult to manufacture at least one piece for each student. This aspect is important so that each student can feel part of the manufacturing process. To achieve this, 3D printers can be used, not to make pieces, but to make the molds that students use to create replicas. On the other hand, for a mold to be used to make several pieces, it is convenient to make it with flexible material. However, most used material for 3D printers (PLA) is very rigid. To solve this problem, this article designs a methodology that allows the use of low-cost 3D printers (most common in school environments) with flexible material so that each mold can be used to manufacture parts for several students. To print flexible material with low-cost printers, it is necessary to adapt the machine and the print parameters to work properly. This article analyzes the changes to be made with a low cost 3D printer and validates the use of molds in school environments. A pilot test has been carried out with 8 students of the subject of Typography, in the School of Art and Superior of Design of Tenerife. During the activity, the students carried out the process of designing a typography and creating digital molds for 3D printing with flexible material. The designs were made using free 3D modeling programs and low-cost technologies.</span></p>

Fully 3D printed GPS Antenna using a Low-cost Open-source 3D Printer

2017 ◽  
Author(s):  
A. Elibiary ◽  
W. Oakey ◽  
S. Jun ◽  
B. Sanz-Izquierdo ◽  
D. Bird ◽  
...  
Keyword(s):  
Open Source ◽  
Low Cost ◽  
3D Printer ◽  
3D Printed ◽  
Gps Antenna

scholarly journals Design and Printing of a Low-Cost 3D-Printed Nasal Osteotomy Training Model: Development and Feasibility Study

10.2196/19792 ◽  
2020 ◽  
Vol 6 (2) ◽  
pp. e19792
Author(s):  
Michelle Ho ◽  
Jared Goldfarb ◽  
Roxana Moayer ◽  
Uche Nwagu ◽  
Rohan Ganti ◽  
...  
Keyword(s):  
Teaching And Learning ◽  
Surgical Simulation ◽  
Low Cost ◽  
Model Development ◽  
Simulation Models ◽  
Training Model ◽  
Tactile Feedback ◽  
3D Printer ◽  
3D Printed ◽  
Free Open Source

Background Nasal osteotomy is a commonly performed procedure during rhinoplasty for both functional and cosmetic reasons. Teaching and learning this procedure proves difficult due to the reliance on nuanced tactile feedback. For surgical simulation, trainees are traditionally limited to cadaveric bones, which can be costly and difficult to obtain. Objective This study aimed to design and print a low-cost midface model for nasal osteotomy simulation. Methods A 3D reconstruction of the midface was modified using the free open-source design software Meshmixer (Autodesk Inc). The pyriform aperture was smoothed, and support rods were added to hold the fragments generated from the simulation in place. Several models with various infill densities were printed using a desktop 3D printer to determine which model best mimicked human facial bone. Results A midface simulation set was designed using a desktop 3D printer, polylactic acid filament, and easily accessible tools. A nasal osteotomy procedure was successfully simulated using the model. Conclusions 3D printing is a low-cost, accessible technology that can be used to create simulation models. With growing restrictions on trainee duty hours, the simulation set can be used by programs to augment surgical training.

scholarly journals CT Conversion Workflow for Intraoperative Usage of Bony Models: From DICOM Data to 3D Printed Models

2019 ◽  
Vol 9 (4) ◽  
pp. 708 ◽  
Author(s):  
Francesco Osti ◽  
Gian Santi ◽  
Marco Neri ◽  
Alfredo Liverani ◽  
Leonardo Frizziero ◽  
...  
Keyword(s):  
Open Source Software ◽  
3D Model ◽  
Low Cost ◽  
Poly Lactic Acid ◽  
3D Printer ◽  
Entry Level ◽  
Area Of Interest ◽  
Operative Planning ◽  
3D Printed ◽  
Surgical Field

This paper presents the application of a low-cost 3D printing technology in pre-operative planning and intra-operative decision-making. Starting from Computed Tomography (CT) scans, we were able to reconstruct a 3D model of the area of interest with a very simple and rapid workflow, using open-source software and an entry level 3D printer. The use of High Temperature Poly-Lactic Acid (HTPLA) by ProtoPasta allowed fabricating sterilizable models, which could be used within the surgical field. We believe that our method is an appealing alternative to high-end commercial products, being superior for cost and speed of production. It could be advantageous especially for small and less affluent hospitals that could produce customized sterilizable tools with little investment and high versatility.

scholarly journals 3D Printed Fully Recycled TiO2-Polystyrene Nanocomposite Photocatalysts for Use against Drug Residues

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2144
Author(s):  
Maria Sevastaki ◽  
Mirela Petruta Suchea ◽  
George Kenanakis
Keyword(s):  
Tio2 Nanoparticles ◽  
Large Scale ◽  
Fused Deposition Modeling ◽  
Low Cost ◽  
Real Life ◽  
3D Printer ◽  
Alternative Route ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
3D Printed

In the present work, the use of nanocomposite polymeric filaments based on 100% recycled solid polystyrene everyday products, enriched with TiO2 nanoparticles with mass concentrations up to 40% w/w, and the production of 3D photocatalytic structures using a typical fused deposition modeling (FDM)-type 3D printer are reported. We provide evidence that the fabricated 3D structures offer promising photocatalytic properties, indicating that the proposed technique is indeed a novel low-cost alternative route for fabricating large-scale photocatalysts, suitable for practical real-life applications.

scholarly journals Design and Printing of a Low-Cost 3D-Printed Nasal Osteotomy Training Model: Development and Feasibility Study (Preprint)

2020 ◽  
Author(s):  
Michelle Ho ◽  
Jared Goldfarb ◽  
Roxana Moayer ◽  
Uche Nwagu ◽  
Rohan Ganti ◽  
...  
Keyword(s):  
Teaching And Learning ◽  
Surgical Simulation ◽  
Low Cost ◽  
Model Development ◽  
Simulation Models ◽  
Training Model ◽  
Tactile Feedback ◽  
3D Printer ◽  
3D Printed ◽  
Free Open Source

BACKGROUND Nasal osteotomy is a commonly performed procedure during rhinoplasty for both functional and cosmetic reasons. Teaching and learning this procedure proves difficult due to the reliance on nuanced tactile feedback. For surgical simulation, trainees are traditionally limited to cadaveric bones, which can be costly and difficult to obtain. OBJECTIVE This study aimed to design and print a low-cost midface model for nasal osteotomy simulation. METHODS A 3D reconstruction of the midface was modified using the free open-source design software Meshmixer (Autodesk Inc). The pyriform aperture was smoothed, and support rods were added to hold the fragments generated from the simulation in place. Several models with various infill densities were printed using a desktop 3D printer to determine which model best mimicked human facial bone. RESULTS A midface simulation set was designed using a desktop 3D printer, polylactic acid filament, and easily accessible tools. A nasal osteotomy procedure was successfully simulated using the model. CONCLUSIONS 3D printing is a low-cost, accessible technology that can be used to create simulation models. With growing restrictions on trainee duty hours, the simulation set can be used by programs to augment surgical training.

scholarly journals OPAM, an Open source, 3D printed Low-cost Micro-Manipulator for Single Cell Manipulation

2021 ◽  
Author(s):  
Jiang Xu ◽  
Zhuowei Du ◽  
Paul Hsi Liu ◽  
Yi Kou ◽  
Lin Chen
Keyword(s):  
Single Cell ◽  
Open Source ◽  
Low Cost ◽  
Cell Manipulation ◽  
Stepper Motor ◽  
Great Promise ◽  
3D Printer ◽  
Cell Capture ◽  
Entry Level ◽  
3D Printed

We introduce OPAM, an Open source, low-cost (under $150), 3D-Printed, stepper motor driven, Arduino based, single cell Micromanipulator (OPAM). Modification of a commercial stepper motor led to dramatically increased stability and maneuverability of the motor, based on which the micromanipulator was designed. All components of this micromanipulator can be 3D printed using an entry-level 3D printer and assembled with ease. With this single cell manipulator, successful targeted single cell capture and transfer was confirmed under the microscope, which showed great promise for single cell related experiments.

scholarly journals Affordable and Faster Transradial Prosthetic Socket Production Using Photogrammetry and 3D Printing

Electronics ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1456
Author(s):  
Rifky Ismail ◽  
Rilo Berdin Taqriban ◽  
Mochammad Ariyanto ◽  
Ali Tri Atmaja ◽  
Sugiyanto ◽  
...  
Keyword(s):  
3D Printing ◽  
3D Model ◽  
Low Cost ◽  
Digital Camera ◽  
Processing Method ◽  
3D Printer ◽  
Casting Method ◽  
Conventional Casting ◽  
Prosthetic Socket ◽  
3D Printed

This study aims to invent a new, low-cost, and faster method of prosthetic socket fabrication, especially in Indonesia. In this paper, the photogrammetry with the 3D printing method is introduced as the new applicative way for transradial prosthetic making. Photogrammetry is used to retrieve a 3D model of the amputated hand stump using a digital camera. A digital camera is used for photogrammetry technique and the resulting 3D model is printed using a circular 3D printer with Polylactic acid (PLA) material. The conventional casting socket fabrication method was also conducted in this study as a comparison. Both prosthetic sockets were analyzed for usability, and sectional area conformities to determine the size deviation using the image processing method. This study concludes that the manufacturing of transradial prosthetic sockets incorporating the photogrammetry technique reduces the total man-hour production. Based on the results, it can be implied that the photogrammetry technique is a more efficient and economical method compared to the conventional casting method. The 3D printed socket resulting from the photogrammetry method has a 5–19% area deviation to the casting socket but it is still preferable and adjustable for the transradial amputee when applied to the stump of the remaining hand.

scholarly journals Design and development of a 3D-printed back-pressure regulator

2020 ◽  
Author(s):  
Lee Walmsley ◽  
Emilie Sellier
Keyword(s):  
Low Cost ◽  
Flow Chemistry ◽  
Back Pressure ◽  
The Novel ◽  
Pressure Regulator ◽  
Pump Head ◽  
3D Printed ◽  
Design Software ◽  
Novel Design ◽  
Cost Components

In this communication, we describe the novel design and preparation of a back-pressure regulator that can be used in flow chemistry applications. Using low-cost components that can be readily sourced, a low-cost 3D printer and freeware design software, we developed, and 3D printed a back-pressure regulator that is simple to assemble and resistant to blocking. This device can be used to maintain the pressure of a fluidic system between the pump head to the back-pressure regulator and allows the collector, or collection vessel to be at atmospheric pressure. Ensuring control of pressure within the fluidic system is essential for maintaining consistent flow rates in flow chemistry set ups.

scholarly journals Design and Development of 3D Printed Catalytically-Active Stirrers for Chemical Synthesis

2019 ◽  
Author(s):  
Matthew Penny ◽  
Stephen Hilton
Keyword(s):  
Chemical Synthesis ◽  
Low Cost ◽  
High Surface ◽  
High Surface Area ◽  
The Novel ◽  
Mannich Reactions ◽  
Catalytically Active ◽  
3D Printed ◽  
Novel Design ◽  
Preparation And Evaluation

<p>In this present study, we describe the novel design, preparation and evaluation of catalyst-impregnated stirrer beads for chemical synthesis. Using a low-cost SLA 3D printer and freeware design software, a high surface area holder for a magnetic stirrer bead was developed and 3D printed containing <i>p</i>-toluenesulfonic acid. The devices were used to efficiently catalyze Mannich reactions in excellent yields and it was demonstrated that the devices can be re-used up to 5-times with excellent reproducibility.</p>

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