Tough biomimetic films for harnessing natural evaporation for various self-powered devices

2020 ◽  
Vol 8 (37) ◽  
pp. 19269-19277
Author(s):  
Tian Yang ◽  
Honglin Yuan ◽  
Sitong Wang ◽  
Xuhan Gao ◽  
Huhu Zhao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Natural Water ◽  
Design Feature ◽  
Power Input ◽  
Water Evaporation ◽  
Soft Robots ◽  
Ionic Crosslinking ◽  
External Power ◽  
Self Powered

The biomimetic films with ionic crosslinking design feature excellent mechanical properties in both dry and wet states, which could be used as actuators, soft robots, and generators powered by natural water evaporation without external power input.

An ultra-low hysteresis, self-healing and stretchable conductor based on dynamic disulfide covalent adaptable networks

2022 ◽  
Author(s):  
weibo kong ◽  
Yunyun Yang ◽  
Yanjun Wang ◽  
Hongfei Cheng ◽  
Peiyao Yan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Health Monitoring ◽  
Self Healing ◽  
Soft Robots ◽  
Stretchable Conductor

Stretchable self-healing conductors can autonomously restore their electrical and mechanical properties after experiencing damage, thus being valuable in the application of prostheses, soft robots, and health monitoring. Currently, most reported...

Electricity generation from a Ni-Al layered double hydroxide-based flexible generator driven by natural water evaporation

Nano Energy ◽  
2019 ◽  
Vol 57 ◽  
pp. 269-278 ◽  
Author(s):  
Jingchang Sun ◽  
Peida Li ◽  
Jiangying Qu ◽  
Xue Lu ◽  
Yaqiao Xie ◽  
...  
Keyword(s):  
Layered Double Hydroxide ◽  
Natural Water ◽  
Electricity Generation ◽  
Water Evaporation ◽  
Double Hydroxide

scholarly journals Detachable Robotic Grippers for Human-Robot Collaboration

2021 ◽  
Vol 8 ◽  
Author(s):  
Zubair Iqbal ◽  
Maria Pozzi ◽  
Domenico Prattichizzo ◽  
Gionata Salvietti
Keyword(s):  
Degrees Of Freedom ◽  
Tactile Feedback ◽  
Industrial Robots ◽  
Physical Interaction ◽  
Robot Arm ◽  
Robotic Hands ◽  
End Effector ◽  
External Power ◽  
Self Powered ◽  
Automatic Tool

Collaborative robots promise to add flexibility to production cells thanks to the fact that they can work not only close to humans but also with humans. The possibility of a direct physical interaction between humans and robots allows to perform operations that were inconceivable with industrial robots. Collaborative soft grippers have been recently introduced to extend this possibility beyond the robot end-effector, making humans able to directly act on robotic hands. In this work, we propose to exploit collaborative grippers in a novel paradigm in which these devices can be easily attached and detached from the robot arm and used also independently from it. This is possible only with self-powered hands, that are still quite uncommon in the market. In the presented paradigm not only hands can be attached/detached to/from the robot end-effector as if they were simple tools, but they can also remain active and fully functional after detachment. This ensures all the advantages brought in by tool changers, that allow for quick and possibly automatic tool exchange at the robot end-effector, but also gives the possibility of using the hand capabilities and degrees of freedom without the need of an arm or of external power supplies. In this paper, the concept of detachable robotic grippers is introduced and demonstrated through two illustrative tasks conducted with a new tool changer designed for collaborative grippers. The novel tool changer embeds electromagnets that are used to add safety during attach/detach operations. The activation of the electromagnets is controlled through a wearable interface capable of providing tactile feedback. The usability of the system is confirmed by the evaluations of 12 users.

Co2.67S4-Based Photothermal Membrane with High Mechanical Properties for Efficient Solar Water Evaporation and Photothermal Antibacterial Applications

2019 ◽  
Vol 11 (23) ◽  
pp. 20820-20827 ◽  
Author(s):  
Le Zhao ◽  
Qingzhu Yang ◽  
Wei Guo ◽  
Haixia Liu ◽  
Tianyue Ma ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Evaporation ◽  
Solar Water

Al2O3-Water Nanofluids for Heat Transfer Application

MRS Advances ◽  
2019 ◽  
Vol 4 (28-29) ◽  
pp. 1611-1619 ◽  
Author(s):  
Lakshita Phor ◽  
Tanuj Kumar ◽  
Monika Saini ◽  
Vinod Kumar
Keyword(s):  
Heat Transfer ◽  
Heat Load ◽  
Volume Fraction ◽  
Average Particle Size ◽  
Power Input ◽  
Experimental Investigations ◽  
Average Particle ◽  
X Ray Diffraction ◽  
Absorption Bands ◽  
External Power

AbstractThis manuscript aims at synthesizing Al2O3-de-ionized water nanofluid and constructing a practical design of self-cooling device that does not require any external power input. Crystalline phase of powder was confirmed by X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) showed the various functional groups and absorption bands and average particle size was calculated to be 58.608 nm by Field Emission Scanning Electron Microscopy (FESEM) annealed at 900K. Experimental investigations were carried out to determine the effect of volume fraction of Al2O3 nanoparticles in the nanofluid on the rate of heat transfer from heat load to heat sink. Temperature of heat load was taken as 80° C. According to our results, cooling by 15°C, 13°C and 12°C was attained when volume fraction of nanoparticles was 1.5%, 1% and 0.5% respectively. The thermal conductivity was also measured and found to be increasing with the concentration of nanoparticles in nanofluid. Hence, indicating the use of nanofluids with suitable concentration in various cooling applications.

A photovoltaic self-powered gas sensor based on a single-walled carbon nanotube/Si heterojunction

Nanoscale ◽  
2017 ◽  
Vol 9 (47) ◽  
pp. 18579-18583 ◽  
Author(s):  
L. Liu ◽  
G. H. Li ◽  
Y. Wang ◽  
Y. Y. Wang ◽  
T. Li ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Visible Light ◽  
Gas Sensor ◽  
Power Source ◽  
Single Walled Carbon Nanotube ◽  
External Power Source ◽  
External Power ◽  
Gas Molecules ◽  
Self Powered ◽  
Trace Concentrations

A self-powered gas sensor activated by visible light which can detect trace concentrations of gas molecules without an external power source.

scholarly journals Recent Advances in Self-Powered Electrochemical Systems

Research ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Linglin Zhou ◽  
Di Liu ◽  
Li Liu ◽  
Lixia He ◽  
Xia Cao ◽  
...  
Keyword(s):  
Mechanical Energy ◽  
Power Source ◽  
Triboelectric Nanogenerator ◽  
Application Domain ◽  
Important Research ◽  
Electrochemical System ◽  
Electrochemical Systems ◽  
External Power Source ◽  
External Power ◽  
Self Powered

Electrochemistry, one of the most important research and production technology, has been widely applicated in various fields. However, the requirement of external power source is a major challenge to its development. To solve this issue, developing self-powered electrochemical system (SPES) that can work by collecting energy from the environment is highly desired. The invention of triboelectric nanogenerator (TENG), which can transform mechanical energy into electricity, is a promising approach to build SPES by integrating with electrochemistry. In this view, the latest representative achievements of SPES based on TENG are comprehensively reviewed. By harvesting various mechanical energy, five SPESs are built, including electrochemical pollutants treatment, electrochemical synthesis, electrochemical sensor, electrochromic reaction, and anticorrosion system, according to the application domain. Additionally, the perspective for promoting the development of SPES is discussed.

scholarly journals The Effects of Different Nanoadditives on the Physical and Mechanical Properties of Similar Silty Mudstone Materials

2020 ◽  
Vol 2020 ◽  
pp. 1-11 ◽  
Author(s):  
Ji-jing Wang ◽  
Zhen-ning Shi ◽  
Ling Zeng ◽  
Shuang-xing Qi
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Water Absorption ◽  
Natural Water ◽  
Physical And Mechanical Properties ◽  
Mechanical Parameters ◽  
Similar Material ◽  
Silty Mudstone ◽  
Similar Materials ◽  
Softening Coefficient

In order to analyze the influence of different nanoadditives on the physical and mechanical properties of similar silty mudstone materials, nano-TiO2 (NTi), nano Al2O3 (NAl), and nanobentonite (NBe) were added to improve the physical and mechanical properties of silty mudstone similar materials. The physical and mechanical parameters are more in line with silty rock. Finally, nanometer additives suitable for silty mudstone similar materials are determined by conducting density test, natural water absorption test, uniaxial compression test, splitting test, softening coefficient test, expansibility test, and microscopic test. The effects of adding NTi, NAl, and NBe on improving the physical and mechanical properties of silty mudstone similar materials were studied to analyze the influence law of different NTi, NAl, and NBe contents on similar material density, natural water absorption, uniaxial compressive strength, tensile strength, softening coefficient, expansion rate, and other physical and mechanical parameters. The microscopic morphology of similar materials was analyzed by scanning electron microscopy and the mechanism of influence of nanoadditives on the microscopic structure of samples was revealed. The results are as follows. (1) The density of similar materials of silty mudstone increases with the increase of the content of nanoadditive. The natural water absorption rate decreased first and then increased with the increase of the content of nanometer additives, while the softening coefficient decreased with the increase of the content of nanometer additives. The uniaxial compressive strength and tensile strength increased first and then decreased with the increase of the content of nanometer additives. This is due to the incorporation of the nanoadditive amount effective to promote the hydration reaction of gypsum and accelerate the production of cement, while a similar material may be filled in the pores, reducing the internal defects, a similar material to make denser; when excessive dosage, nanoadditives agglomeration occurs, resulting in deterioration of the effect, but will reduce the mechanical properties of similar materials. (2) When the content of NBe is 6%, the physical and mechanical parameters of similar materials can reach or be closer to the silty raw rock except uniaxial compressive strength. The failure mode of the uniaxial compression specimen is also the same as that of the original rock, which can be used as the best choice. The research results laid the foundation for further analysis of NBe application in similar materials.

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