Article: Applications of super hydrophobic liquid-solid friction nanogenerators as droplet sensors in biomedicine
In recent years, friction nanogenerators have become the focus of attention of researchers. Both as energy capture devices and as spontaneous electrical sensors, they have been widely studied.
However, there are some residual problems in the ordinary liquid-solid contact friction nano generator, which leads to the decrease of its sensitivity as a sensor and the service life of the body.
Considering the excellent repulsion of water, tissue fluid, blood, urine, pus and other fluids, super hydrophobic surface has opened up a new way for the development of biomedical equipment and made certain progress in the fields of plasma separator, vascular stent, heart valve and so on.
Based on this, Professor Yang Guang's team of Huazhong University of Science and Technology designed a super-hydrophobic liquid-solid contact friction nano generator (Figure 1, a) through simple manufacturing process and hydrophobic silicon nanoparticle coating method, and studied its application as a droplet sensor in biomedicine.
The liquid-solid contact friction nano generator not only has excellent hydrophobic properties, but also has strong repulsive effect on acid, alkali, phosphate buffer, urine and blood. The contact Angle of the six solutions on its surface is close to 160 degrees (Figure 1, b).
When the droplets of the six liquids rolled or bounced on the surface of the super-hydrophobic liquid-solid contact friction nanogenerator, each droplet could generate a current peak signal (FIG. 1, b), indicating its very sensitive detection ability as a droplet sensor.
Using the super hydrophobic liquid - solid contact friction nano generator for drainage design drainage bottle of liquid drop sensor can be real-time monitoring patients (figure 1, c), the condition of the drainage time and quantity of drain on the patient record, the doctor according to the recorded data can better analysis of patients with wounds, drainage operation finished in time, reduce the pain of the patients.
The super-hydrophobic liquid-solid contact friction nano generator is also viscous and flexible, and the tubular droplet counter can be obtained by sticking it into the silica gel tube, and then the intelligent intravenous infusion device can be designed.
By simulating intravenous fluids experiment found that the design of intelligent intravenous infusion fluids can be monitored in different speed (figure 1, c), it has a good real-time monitoring function, can provide the infusion for transfusion patients and medical staff information, further counting can be combined with wireless data transmission, and smart mobile devices, patients and medical staff can through intelligent mobile equipment control infusion information, real-time understanding of transfusion, such as infusion speed, infusion rest time, transfusion alarm prompt, etc., so as to reduce the workload of medical staff, improve patients with infusion of comfort, improve the quality of transfusion nursing.
FIG. 1. (a) Schematic diagram of super-hydrophobic liquid-solid contact friction nanogenerator.
(b) Contact infiltration diagrams of the six types of droplets with the surface of the friction nanogenerator and the current pulses generated by the activity on them.
(c) and (d) Drainage flask droplet sensor and intelligent intravenous infusion apparatus based on super-hydrophobic droplet friction nanogenerator.
This work is done jointly by Huazhong University of Science and Technology and Wuhan University of Technology, and is recently titled "Superhydrolent-Solid Contact Triboelectric Nanogenerator as Droplet Sensor for Biomedical Applications". The cover article has been published in the journal ACS Applied Materials & Interfaces.
The first author of the paper is Hu Sanming, a doctoral student of Huazhong University of Science and Technology; the first author is Shi Zhijun, a doctor of Huazhong University of Science and Technology; the corresponding author is Yang Guang, a professor of Huazhong University of Science and Technology; the second author is Zhao Weiwei, an associate professor of Wuhan University of Technology.
The research work is supported by the National Natural Science Foundation of China and the National Key Research and development Plan.
The thesis links: http://dx.doi.org/10.1021/acsami.0c10097
Paper Citation:
S. Hu, Z. Shi, R. Zheng, W. Ye, X. Gao, W. Zhao*, G. Yang*,
"Superhydrophobic Liquid-Solid Contact Triboelectric Nanogenerator as Droplet Sensor for Biomedical Applications. ACS Appl. Products.interfaces. Am -2020-100972.