Sun Potao, Li Zhaoping, Sima Wenxia, Yuan Tao, Yang Ming, Fan Kaisen, Chen Xiaoxiao, Pang Wenlong
State Key Laboratory of Power Transmission Equipment Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, People's Republic of China.
ACS Appl Mater Interfaces. 2024 Apr 24. doi: 10.1021/acsami.3c18483.
The long-term operation of power equipment and power electronics can cause local overheating and discharges in the insulation material, resulting in irreversible insulation damage. Further development of such damage can eventually lead to equipment failure, but this problem is very difficult to solve. In this paper, inspired by how the petals of morning glory change color with the environment due to the presence of pigmented globules, a dual-function heat alert in the form of a self-healing (HASH) microcapsule with a nested structure is prepared by using microfluidic technology. By combination of the microcapsule with the insulation material, the local overheating in equipment can be detected promptly under live operating conditions without manual external intervention, and the defects that occur can be repaired autonomously. These HASH microcapsules can be pre-embedded in places at which the material is prone to overheating using artificial magnetic targeting. The doping of the matrix material with microcapsules does not cause any deterioration in its electrical or mechanical properties. This technology is expected to be applied to electrical equipment and electronic devices to allow for the early detection of local overheating and the autonomous repair of defects, thereby ensuring the safety of the equipment and improving its service life.
电力设备和电力电子器件的长期运行会导致绝缘材料局部过热和放电，从而造成不可逆的绝缘损坏。这种损坏的进一步发展最终可能导致设备故障，但这个问题很难解决。在本文中，受牵牛花花瓣因存在色素小球而随环境变色的启发，利用微流控技术制备了一种具有嵌套结构的自修复热警报（HASH）微胶囊形式的双功能热警报器。通过将微胶囊与绝缘材料相结合，在带电运行条件下无需人工外部干预即可及时检测设备中的局部过热情况，并且可以自动修复出现的缺陷。这些HASH微胶囊可以通过人工磁靶向预先嵌入材料容易过热的部位。微胶囊掺杂到基体材料中不会导致其电气或机械性能的任何劣化。这项技术有望应用于电气设备和电子器件，以便能够早期检测局部过热并自动修复缺陷，从而确保设备安全并延长其使用寿命。
