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Thermochromic Janus Membranes with Dynamic Solar Modulation toward Sustainable and High-Efficiency Solar-to-Thermal Intelligent Management
ACS Sustainable Chemistry & Engineering ( IF 8.4 ) Pub Date : 2024-04-30 , DOI: 10.1021/acssuschemeng.4c01003
Qian Yan 1 , Renjie Ding 1 , Pengyang Li 1 , Haowen Zheng 1 , Zhong Chen 1 , Jinhua Xiong 1 , Zonglin Liu 1 , Xu Zhao 1 , Fuhua Xue 1 , Liangliang Xu 1 , Huanxin Lian 1 , Shanyi Du 1 , Zhigong Tang 1 , Qingyu Peng 1 , Xiaodong He 1
Affiliation  

Solar-energy thermal management, characterized by its environmental friendliness, cost-effectiveness, and efficiency, holds a promising future, which has brought about widespread interest in the evolution of solar-to-thermal materials with the desired properties. Nevertheless, in both hot and cold environments, challenges in developing functionally integrated hydrogels for sustainable thermal regulation still remain. In this study, a rationally, simply, and effectively designed structured Janus membrane, consisting of a Ti3C2Tx MXene/GO/alginate fibers nonwoven (GMF) layer and a P (NIPAM co-DMAA) (PAD) hydrogel layer. The GMF with excellent hydrophilicity forms an interpenetrating structure with the PAD hydrogel through strong hydrogen bonds and can be easily adapted to multishape and multifield applications. By adjusting the content of thermochromic PAD hydrogel monomers, an improvement in the critical transition temperature (37.7 °C) and a reduction in volume shrinkage has been achieved, and the full-spectrum intrinsic transmittance is 67.59%, which is of excellent practicability and cyclic stability. Under constant sunlight, the hydrogel’s phase transition decelerates the temperature increment in the photothermal layer, thereby establishing a stable equilibrium temperature in the environment. The equilibrium temperature of the photothermal layer can be adjusted between 32 and 36 °C to match a variety of climates by regulating the relative content of the Ti3C2Tx MXene and GO in the photothermal layer. Additionally, the existence of the thermochromic hydrogel in the Janus membrane prevents the indoor temperature from overheating. Furthermore, the membrane’s asymmetric structure enhances its ability to reduce heat dissipation, crucial for high-performance thermal management. Moreover, this novel structure can be used as a self-supporting agricultural film to maintain a stable temperature in the environment for efficient plant growth, demonstrating significant potential in new modern agriculture.

中文翻译:

具有动态太阳能调节功能的热致变色 Janus 膜可实现可持续且高效的太阳能热智能管理

太阳能热管理以其环境友好、成本效益和效率为特点,有着广阔的前景,这引起了人们对具有所需性能的太阳能热材料的发展的广泛兴趣。然而,在炎热和寒冷的环境中,开发功能集成水凝胶以实现可持续热调节的挑战仍然存在。在这项研究中,一种合理、简单、有效设计的结构化Janus膜,由Ti 3 C 2 T x MXene/GO/藻酸盐纤维非织造布(GMF)层和P(NIPAM co-DMAA)(PAD)水凝胶层组成。具有优异亲水性的GMF通过强氢键与PAD水凝胶形成互穿结构,可以轻松适应多形状和多领域应用。通过调节热致变色PAD水凝胶单体的含量,实现了临界转变温度(37.7℃)的提高和体积收缩的降低,全光谱本征透过率为67.59%,具有优异的实用性和循环性稳定。在恒定的阳光照射下,水凝胶的相变减缓了光热层的温度增量,从而在环境中建立了稳定的平衡温度。通过调节光热层中Ti 3 C 2 T x MXene和GO的相对含量,可以将光热层的平衡温度调节在32℃至36℃之间,以适应各种气候。此外,Janus膜中热致变色水凝胶的存在可以防止室内温度过热。此外,膜的不对称结构增强了其减少散热的能力,这对于高性能热管理至关重要。此外,这种新颖的结构可以用作自支撑农膜,保持环境温度稳定,促进植物高效生长,在新型现代农业中展现出巨大的潜力。
更新日期:2024-04-30
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