Li Hui, He Jiangang, Liang Chunzu, Bin Fengjiao, Li Xu, Wang Xianda, Wang Zihao, Bu Xiangxiao, Xiao Dengbao, Jia He, Rong Wei
Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China.
AVIC Chengdu Aircraft Design & Research Institute, Chengdu 610091, China.
iScience. 2025 Jan 13;28(2):111794. doi: 10.1016/j.isci.2025.111794. eCollection 2025 Feb 21.
monitoring of non-uniform strains in spacecraft parachute canopies is essential to ensure safe landings. Traditional wearable strain sensors struggle to meet high-resolution measurement requirements due to their low density. inkjet printing offers a promising solution for fabricating high-density strain sensor arrays directly on the fabric surface. However, capillary effects in the canopy fabric cause droplet leakage, hindering stable printing. To address this, we drew inspiration from nature, using modified silane to mimic the wax layer of coconut husk for modifying the canopy fabric, which enabled the fabrication of a strain sensor array via inkjet printing. This modification overcame capillary effects and balanced the fabric's wettability, essential for stable printing. Furthermore, a layered printing strategy was designed to increase sensor density to 4 units·cm, facilitating high-resolution measurement of non-uniform strains in the canopy. This study offers a feasible approach for developing sensors for large-scale parachute strain measurements.
监测航天器降落伞伞衣中的非均匀应变对于确保安全着陆至关重要。传统的可穿戴应变传感器由于其低密度而难以满足高分辨率测量要求。喷墨打印为直接在织物表面制造高密度应变传感器阵列提供了一种有前景的解决方案。然而，伞衣织物中的毛细管效应会导致液滴泄漏，阻碍稳定打印。为了解决这个问题，我们从自然界中获得灵感，使用改性硅烷模仿椰壳的蜡层来改性伞衣织物，从而能够通过喷墨打印制造应变传感器阵列。这种改性克服了毛细管效应并平衡了织物的润湿性，这对于稳定打印至关重要。此外，设计了一种分层打印策略，将传感器密度提高到4个单元·厘米，便于对伞衣中的非均匀应变进行高分辨率测量。这项研究为开发用于大规模降落伞应变测量的传感器提供了一种可行的方法。
