Metalized polyamide heterostructure as a moisture-responsive actuator for multimodal adaptive personal heat management

作者：Xiuqiang Li, Boran Ma, Jingyuan Dai, Chenxi Sui, Divya Pande, David R. Smith, L. Catherine Brinson, Po‐Chun Hsu · 发表于：Science Advances · 年份：2021 · DOI：10.1126/sciadv.abj7906 · 被引用次数：147 · 研究领域：Thermal Radiation and Cooling Technologies、Urban Heat Island Mitigation、Building Energy and Comfort Optimization

Personal thermal management textile/wearable is an effective strategy to expand the indoor temperature setpoint range to reduce a building’s energy consumption. Usually, textiles/wearables that were engineered for controlling conduction, convection, radiation, or sweat evaporation have been developed separately. Here, we demonstrate a multimodal adaptive wearable with moisture-responsive flaps composed of a nylon/metal heterostructure, which can simultaneously regulate convection, sweat evaporation, and mid-infrared emission to accomplish large and rapid heat transfer tuning in response to human perspiration vapor. We show that the metal layer not only plays a crucial role in low-emissivity radiative heating but also enhances the bimorph actuation performance. The multimodal adaptive mechanism expands the thermal comfort zone by 30.7 and 20.7% more than traditional static textiles and single-modal adaptive wearables without any electricity and energy input, making it a promising design paradigm for personal heat management.