Development of a bipolar electrostatic chuck with a compliant beam-array assembly having four 3D-printed layers for large film handling

2022 ◽  
Author(s):  
Yuki Taoka ◽  
Terumichi Hayashi ◽  
Pasomphone Hemthavy ◽  
Kunio Takahashi ◽  
Shigeki Saito
Keyword(s):  
Thin Film ◽  
Attractive Force ◽  
Beam Array ◽  
Mechanical Compliance ◽  
Pick And Place ◽  
3D Printed

Abstract This study proposes and verifies bipolar electrostatic grippers stacking 3D-printed-layered modules consisting of arrays of elastically deformable bipolar beams. The influence of the mechanical compliance of grippers on the attractive force that it generates is clarified by comparing two types of modules having either high or low mechanical compliances. Experiments measured the attractive force of the gripper and demonstrated the pick-and-place performance of a thin film. The results show that mechanical compliance plays an important role in mitigating the attractive force decrease in stacking modules. The grippers’ ability for thin film handling is demonstrated by observing pick-and-place behaviours of the proposed bipolar electrostatic grippers.

Application of a Viscous Liquid as an Aerosol for Post-Operative Adhesion Prevention: First Engineering Steps Towards Nozzle Design

2020 ◽  
Author(s):  
P. Alex Smith ◽  
Timothy J. Keane ◽  
Stefano Serpelloni ◽  
Stephen G. Ramon ◽  
Francesca Taraballi
Keyword(s):  
Thin Film ◽  
Minimally Invasive ◽  
Viscous Liquid ◽  
Scar Tissue ◽  
Adhesion Prevention ◽  
Nozzle Design ◽  
Postoperative Adhesions ◽  
Internal Organs ◽  
Spray Pattern ◽  
3D Printed

Abstract Postoperative adhesions are scar tissue that form between internal organs after surgery, leading to devastating life-long complications. Current adhesion barriers used clinically are solid sheets which can only be applied in open surgeries through large incisions. We have developed a material which can be applied as a liquid in minimally invasive surgeries which transitions into a solid thin film barrier upon contact with warm tissue. However, to be effective, it must be sprayed, and spraying a viscous liquid consistently is challenging. We proposed using a gas dispersant to facilitate aerosolization. In this study, we compared a commercially available nozzle without gas dispersant to a custom 3D printed nozzle with gas dispersant. For comparison, we measured both spray pattern and stiffness of the resulting gel. We found that when sprayed with gas dispersant, the spray pattern covered a larger area, and the resulting gel was stiffer than when sprayed without gas dispersant.

Development of Wire Actuated Monolithic Soft Gripper Positioned by Robot Manipulator

2020 ◽  
Author(s):  
Rafael Barreto Gutierrez ◽  
Martin Garcia ◽  
Joan McDuffie ◽  
Courtney Long ◽  
Ayse Tekes
Keyword(s):  
Robot Manipulator ◽  
Compliant Mechanism ◽  
Experimental Testing ◽  
Service Robot ◽  
Servo Motor ◽  
Single Piece ◽  
Pick And Place ◽  
Grasping Force ◽  
3D Printed ◽  
The Right

Abstract This paper presents the design and development of a two fingered, monolithically designed compliant gripper mounted on a two-link robot. Rigid grippers traditionally designed by rigid links and joints might have low precision due to friction and backlash. The proposed gripper is designed as a single piece compliant mechanism consisted of several flexible links and actuated by wire through a servo motor. The gripper is attached to a two-link arm robot driven by three step motors. An additional servo motor can also rotate the base of the robot. While the robot is 3D printed using polylactic acid (PLA), the gripper is 3D printed in thermoplasticpolyurethane (TPU). Two force sensors are attached to the right and left ends of the gripper to measure grasping force. Experimental testing for grasping various objects having different sizes, shapes and weights is carried out to verify the robust performance of the proposed design. Through the experimentation, it’s been noted that the compliant gripper can successfully lift up objects at a maximum mass of 200 g and have a better performance if the objects’width is closer to the width of the gripper. The presented mechanism can be utilized as a service robot for elderly people to assist them pick and place objects or lift objects if equipped with necessary sensors.

scholarly journals 3D printed MOF-based mixed matrix thin-film composite membranes

RSC Advances ◽  
2021 ◽  
Vol 11 (41) ◽  
pp. 25658-25663
Author(s):  
Sameh K. Elsaidi ◽  
Mayur Ostwal ◽  
Lingxiang Zhu ◽  
Ali Sekizkardes ◽  
Mona H. Mohamed ◽  
...  
Keyword(s):  
Thin Film ◽  
3D Printing ◽  
Composite Membranes ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Film Composite ◽  
Thin Film Composite ◽  
3D Printed ◽  
Matrix Membranes

An electrospray 3D printing approach for fabricating thin-film composite mixed-matrix membranes (TFC MMM) with a thickness of 2–3 μm.

scholarly journals Inks Development for 3D Printing Cathode of Li-Ion Microbatteries

Proceedings ◽  
2018 ◽  
Vol 3 (1) ◽  
pp. 7 ◽  
Author(s):  
Maxim Maximov ◽  
Denis Kolchanov ◽  
ILya Mitrofanov ◽  
Alexander Vinogradov ◽  
Yury Koshtyal ◽  
...  
Keyword(s):  
Thin Film ◽  
Cathode Material ◽  
Inkjet Printing ◽  
Substrate Surface ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
Aqueous Solvent ◽  
3D Printed ◽  
Materials Used

Due to the demand for wearable and implantable microelectronic devices (MED), there is growing interest in the development of thin-film lithium-ion microbatteries (LiBs) with high-energy density. The high cost of production is an issue restraining thin-film LiBs’ wide application. Inkjet printing is a method of applying materials to the substrate surface: ink droplets formed on piezoelectric nozzles fall on the substrate, whereafter evaporation of the solvent thin layer of film is formed. The proposed technology can simplify the production of LiBs for MED and reduce their cost. The present work reports the results of inkjet printing 3D cathode development for LiBs. The 3D printed cathodes were produced using synthesized Li-rich cathode material (Li1.2+xMn0.54Ni0.13Co0.13O2, 0 < x < 0.05) which has a larger capacity (>250 mAh/g) in comparison with the materials used in modern lithium-ion cells. For LiB electrode printing, the non-aqueous solvent-based inks were used. The prepared cathode material was dispersed in N-methyl-2-pyrrolidone. The effect of various additives such as ethylene glycol, diethylene glycol, propylene glycol on the viscosity and stability of the ink was studied. Inkjet printing was performed with the use of a Dimatix Material Printer 2831. Substrate temperature, number of layers and other parameters were varied to determine the optimal printing conditions.

Application and Evaluation of 3D Printed Materials with PALS

2017 ◽  
Vol 373 ◽  
pp. 303-306
Author(s):  
Matthew D. Paul ◽  
Jonathan S. Davis ◽  
Yan Ching Jean ◽  
J. David van Horn
Keyword(s):  
Thin Film ◽  
Carbon Nanotubes ◽  
Carbon Fiber ◽  
Sample Preparation ◽  
Initial Study ◽  
3D Printer ◽  
Sample Holder ◽  
Before And After ◽  
3D Printed ◽  
Printed Materials

In this study, the use of a 3D printer for sample holder fabrication and polymer sample preparation for positron analysis was explored. Custom printed 3D holders may be rapidly made and modified for a variety of thin-film, crystalline, or other diversely-shaped samples. For positron studies a 3D printer allows for the preparation of standard and unique polymer samples. In an initial study, a mesoporous-patterned ABS sample was attempted, without success. Various polymers (ABS, PLA, and PETG) and the same polymers with varied additives (carbon fiber or carbon nanotubes) were studied before and after printing. The different polymers and those with additives are distinguishable via PALS. Samples show a consistently lower I3 value after printing, suggesting a decrease in defect quantity for the printed polymer versus the as-received polymer filament.

Selective Pick-and-Place of Thin Film by Robotic Micromanipulation

2014 ◽  
pp. 1362-1374
Author(s):  
Bruno Sauvet ◽  
Mohamed Boukhicha ◽  
Adrian Balan ◽  
Gilgueng Hwang ◽  
Dario Taverna ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Mechanical Systems ◽  
Novel Approach ◽  
Chemical Residues ◽  
Pick And Place ◽  
Selection Of

Micro-engineering is increasingly interested in the use of thin films with thicknesses of less than 20nm. Before integrating these promising materials into complex Nano Electro Mechanical Systems (NEMS), their properties must be characterized. They must be transferred onto specific substrates for analysis. Current manipulation techniques are not suitable for the transfer of these thin films as they do not allow selection of the parts of the object that must be manipulated, and the quality of the sample is altered by traces of chemical residues. To perform the transfer of a selected thin film without modifying its properties, this paper presents a novel approach based on local gluing. This method has been validated by experiments performed on graphite films. Successful transfers of thin films of 4.2 × 4.7 µm2 to 70 × 12 µm2 with an estimated thickness of between 10 and 40 layers have been demonstrated. Limits of this technique are discussed.

scholarly journals Organic Thermoelectric Multilayers with High Stretchiness

Nanomaterials ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 41
Author(s):  
Chungyeon Cho ◽  
Jihun Son
Keyword(s):  
Thin Film ◽  
Polyethylene Oxide ◽  
Three Dimensional ◽  
Layer By Layer ◽  
Wearable Electronics ◽  
Mechanical Compliance ◽  
Assembly Technique ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Layer Assembly

A stretchable organic thermoelectric multilayer is achieved by alternately depositing bilayers (BL) of 0.1 wt% polyethylene oxide (PEO) and 0.03 wt% double walled carbon nanotubes (DWNT), dispersed with 0.1 wt% polyacrylic acid (PAA), by the layer-by-layer assembly technique. A 25 BL thin film (~500 nm thick), composed of a PEO/DWNT-PAA sequence, displays electrical conductivity of 19.6 S/cm and a Seebeck coefficient of 60 µV/K, which results in a power factor of 7.1 µW/m·K2. The resultant nanocomposite exhibits a crack-free surface up to 30% strain and retains its thermoelectric performance, decreasing only 10% relative to the unstretched one. Even after 1000 cycles of bending and twisting, the thermoelectric behavior of this nanocomposite is stable. The synergistic combination of the elastomeric mechanical properties (originated from PEO/PAA systems) and thermoelectric behaviors (resulting from a three-dimensional conjugated network of DWNT) opens up the possibility of achieving various applications such as wearable electronics and sensors that require high mechanical compliance.

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