China3D printingNet February 22, South Korea’s Chonbuk National University and Chinese materials provider Wuhan Chamtop scientists collaborate3D printingThe new wearable self-powered sensor.
The team’s all-printing equipment is based on a unique barium-loaded PVDF polymer, which can effectively collect piezoelectric energy generated by human motion. When the sensor is installed in the array, it is proven to be able to use this charge to detect pressure input and convert it into a signal, which is a major advancement in the development of high-performance additive wearable electronic devices.
3D printing
The sensor “alt=”The image shows the taekwondo belt being tested
3D printing
Sensor” width=”620″ height=”434″ />
The image shows the taekwondo belt being tested3D printingsensor
, The researchers tested their sensor by mounting it on a taekwondo belt and repeatedly hitting it with different forces. The picture comes from Nanoscale magazine.
Piezoelectronics
Given the potential of self-powered sensors in the manufacture of wearable medical or sports-related monitoring devices, it is not surprising that they have become an increasingly popular topic in research. Contrary to ordinary battery-driven actuators, self-powered technology is usually more compact, more environmentally friendly, and has lower manufacturing costs.
Piezoelectric devices have special prospects in this field due to their flexibility, net power output, and ease of manufacturing, and have higher performance compared to triboelectric energy sources (eg, static).Although PVDF has become3D printingThe popular base material for these sensors, but it usually needs to be filled with nucleating additives to achieve its best piezoelectric performance.
In previous studies, mixing materials with polymers has produced devices with limited efficacy, and it was found that the addition of barium titanate (BTO) can enhance the desired performance, but can cause particle aggregation.In order to solve this problem, scientists have proposed the use of similar ingredients3D printingThe sensor, although this sensor uses a novel “mortise-shaped” structure.
3D printing
The sensor is built on the BTO-PVDF base” alt=” scientist’s
3D printing
The sensor is built on the BTO-PVDF base” width=”620″ height=”457″ />
Scientist’s3D printingThe sensor is built on a BTO-PVDF base. The picture comes from Nanoscale magazine.
3D printingSensor array
Once the researchers determined the best PVDF-BTO formulation, they deployed the Musashi Engineering robotic arm3D printingMachine to dispense the material into the film. Then, before using nickel tape to mark its electrodes, silver paste is printed on the surface of the device and polarized under an electric field.
The resulting sensors are arranged in a U-shaped 7×7 cm2 array, and the characteristics are tested. Preliminary results show that there is no obvious BTO sedimentation in the resin, which is an important precursor for potential industrial applications. Interestingly, the research team also found that increasing the level of BTO concentration in the film has a relevant effect on its piezoelectric properties.
For example, those prototypes composed of 10% barium nanoparticles (NPs) showed a current of 24.3 pC/N, and when the sample was loaded at a concentration of 50%, its current increased to 69.1 pC/N. In view of their best performance, the latter type of sensor was subsequently deployed for sports evaluation, and taekwondo protective gear was installed in it.
Upon impact, these devices can detect different levels of force based on the amount of voltage generated, which may prove useful as a training tool for athletes.In view of the flexibility of its array, scientists also suggest that it can be3D printingTo other wearable devices, so that they can monitor various sports activities without external power supply.
Piezoelectric potential
Piezoelectric material3D printingEnabling the production of battery-free equipment with moving parts can prove to be an ideal choice for various clinical and soft robotics applications.
Scientists at the University of Wisconsin-Madison have used the technology3D printingThe blood vessels can remotely monitor the blood pressure of the patient. The tubular device emits piezoelectric pulses to remind patients when they need urgent medical care without the need for an external power source.
At the same time, a consortium of Chinese researchers passed3D printingAutomatically powered manipulator fingers can sense changes in curvature without using conventional batteries. The team hopes that their multi-material additive numbers will inspire the development of other piezoelectric-driven soft robotics technologies in the future.
In terms of novel materials, engineers at Virginia Tech and State University have also made great strides. In the latest research conducted there, a team developed a method for DLP 3D printingPiezoelectric ceramics, and use it to create a variety of complex self-supporting structures.
China3D printingNet compile article!
(Editor in charge: admin)
0 Comments for “Scientists use self-sensing sensors to make a breakthrough in 3D printed wearable devices”