Domestic team successfully developed graphene temperature flow integrated sensor
2018-04-16 19:00:13
[China Instrument Network Instrument R&D] Domestic researchers have successfully developed large-scale, high-precision flow and temperature sensors based on graphite thin materials, which are expected to be used in thermal systems.
Recently, Professor Zhu Hongwei of Tsinghua University teamed up with Beijing Huada Zhibao Electronic System Co., Ltd. to develop a graphene integrated temperature and flow sensor device. Based on the application requirements of the flow rate and temperature sensor for thermal system detection, they studied the role and the law of graphene sensing, broke through the key technology of the application of graphene materials in the heat meter flowmeter, and developed graphene flow and temperature for the detection of thermal systems. The sensor device solves the problem of fouling and high power consumption on the surface of existing sensors and forms a batch production capability, which is expected to be applied on a scale in thermal systems.
The team completed the research on the modulation performance of the graphene wafer shape, size, and surface/interface state, and developed a large range of high-precision flow and temperature sensors through the sensing process structure design based on graphite thin materials. The measurement range of the flow sensor element reaches 0.01~6m3/h, the measurement accuracy reaches 0.005m3/h, the measurement range of the temperature sensor element reaches 0~100°C, and the measurement accuracy reaches 0.02°C.
Based on the graphene flow rate and temperature sensing materials, two expansion studies were carried out simultaneously: 1) A new idea for high-sensitivity and flexible strain sensing was proposed, which was constructed by compounding graphene with super-elastic super-thin polymer materials. Based on flexible sensor prototype devices, a manufacturing method and process for sensors based on wearable devices was developed. Several typical sensing applications such as strain, piezoresistive, torsion, volatile organics, and acoustic waves were explored. Detecting weak physiological signals, such as pulse and speech, is expected to be applied in the fields of mobile medicine and wearable devices; 2) Studying the diffusion characteristics of water in graphene layer pores and developing an isotope labeling method to reveal water molecules The diffusion coefficient in graphene is 4 to 5 orders of magnitude higher than the diffusion coefficient of the micron-sized channel in the microporous membrane, demonstrating that the water molecules can be transported at ultrafast speeds, laying the foundation for the study of the mass transfer characteristics of graphene-based membranes. The rapid filtration and separation field shows a broad application prospect.
The relevant research and development achievements have published 15 papers collected by SCI, applied for 5 national invention patents, and have been granted 1 utility model patent. The six sensors prepared were published in the journals of ACSNano, Adv.Funct.Mater., Small, NanoRes., Appl.Phys.Lett., Chem.Commun. and were used by the academic media Nanowerk, Graphene-Info and MaterialsViewsWiley. The research highlights were reported as "...the new sensing mechanism, the high performance applications of graphene...", "the electromechanical effects of graphene combined with other properties...promoted applications in highly sensitive sensing, ... the potential of these sensors Applications include flexible displays, smart clothing, electronic skin, and in-vitro diagnostics, and there is ample room for use in wearable health testing devices."
The team completed the research on the modulation performance of the graphene wafer shape, size, and surface/interface state, and developed a large range of high-precision flow and temperature sensors through the sensing process structure design based on graphite thin materials. The measurement range of the flow sensor element reaches 0.01~6m3/h, the measurement accuracy reaches 0.005m3/h, the measurement range of the temperature sensor element reaches 0~100°C, and the measurement accuracy reaches 0.02°C.
Based on the graphene flow rate and temperature sensing materials, two expansion studies were carried out simultaneously: 1) A new idea for high-sensitivity and flexible strain sensing was proposed, which was constructed by compounding graphene with super-elastic super-thin polymer materials. Based on flexible sensor prototype devices, a manufacturing method and process for sensors based on wearable devices was developed. Several typical sensing applications such as strain, piezoresistive, torsion, volatile organics, and acoustic waves were explored. Detecting weak physiological signals, such as pulse and speech, is expected to be applied in the fields of mobile medicine and wearable devices; 2) Studying the diffusion characteristics of water in graphene layer pores and developing an isotope labeling method to reveal water molecules The diffusion coefficient in graphene is 4 to 5 orders of magnitude higher than the diffusion coefficient of the micron-sized channel in the microporous membrane, demonstrating that the water molecules can be transported at ultrafast speeds, laying the foundation for the study of the mass transfer characteristics of graphene-based membranes. The rapid filtration and separation field shows a broad application prospect.
The relevant research and development achievements have published 15 papers collected by SCI, applied for 5 national invention patents, and have been granted 1 utility model patent. The six sensors prepared were published in the journals of ACSNano, Adv.Funct.Mater., Small, NanoRes., Appl.Phys.Lett., Chem.Commun. and were used by the academic media Nanowerk, Graphene-Info and MaterialsViewsWiley. The research highlights were reported as "...the new sensing mechanism, the high performance applications of graphene...", "the electromechanical effects of graphene combined with other properties...promoted applications in highly sensitive sensing, ... the potential of these sensors Applications include flexible displays, smart clothing, electronic skin, and in-vitro diagnostics, and there is ample room for use in wearable health testing devices."