Lei Leqi, Wang Dong, Shi Shuo, Yang Jieqiong, Su Jing, Wang Cong, Si Yifan, Hu Jinlian
Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong.
Key Laboratory of Eco-Textile, College of Textiles and Clothing, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China.
Mater Horiz. 2023 Oct 2;10(10):4407-4414. doi: 10.1039/d3mh00768e.
Maintaining a reasonably stable body temperature is vital for a variety of human activities in an energy-conservation strategy. However, it is well-known that metal-like materials, utilized as radiative reflectors, severely restrict wearability properties, thus posing a tremendous obstacle in personal thermal management (PTM) systems. Herein, we designed a supramolecular-enhanced membrane (SupraEM) acting as a mid-infrared (MIR) reflector to solve the conundrum of warmth-wearability performance. Benefiting from the low-emissivity of decorating titanium carbide (MXene) and the formation of supramolecular interactions, the prototyped polyvinylidene difluoride&Polyurethane/MXene (PVDF&PU/MXene) SupraEM demonstrated a low-emissivity of 0.246 and reinforced mechanical performance, resulting in an evenly higher temperature retention of 8 °C in comparison to the pristine hybrid membrane counterpart, and compared with a commercial textile that is three times thicker, it also exhibited higher temperature retention of 6.2 °C. This work demonstrates the wearability of decorated MXene without sacrificing its temperature retention, overcoming a major bottleneck that has plagued MXene as a thermoregulatory material for PTM systems.
在能量守恒策略中，维持相对稳定的体温对于人类的各种活动至关重要。然而，众所周知，用作辐射反射器的类金属材料严重限制了可穿戴性能，从而在个人热管理（PTM）系统中构成了巨大障碍。在此，我们设计了一种超分子增强膜（SupraEM）作为中红外（MIR）反射器，以解决保暖性与可穿戴性之间的难题。得益于装饰碳化钛（MXene）的低发射率以及超分子相互作用的形成，原型聚偏二氟乙烯&聚氨酯/MXene（PVDF&PU/MXene）SupraEM表现出0.246的低发射率和增强的机械性能，与原始混合膜相比，温度保持均匀高出8°C，与三倍厚的商业纺织品相比，其温度保持也高出6.2°C。这项工作证明了装饰后的MXene在不牺牲其保温性能的情况下具有可穿戴性，克服了困扰MXene作为PTM系统热调节材料的一个主要瓶颈。
