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STAR Protocols · 2024 · IF 1.3

Protocol to develop a moisture-desorptive passive cooling system for electronics thermal management

Zengguang Sui,Yunren Sui,Zhixiong Ding,Haosheng Lin,Fuxiang Li,Wei Wu

Summary Passive thermal management with zero-energy consumption and high compactness has drawn increasing attention. Here, we present a protocol to develop a hygroscopic salt-loaded heat sink with a moisture-permeable membrane encapsulation technique for electronics cooling. We describe steps for preparing lithium bromide solution and heat sink with anti-corrosion graphene coating. We then detail procedures for preparing the hygroscopic salt-loaded membrane-encapsulated heat sinks (HSMHSs). The produced low-cost HSMHS exhibits remarkably high thermal management performance without the risks of leakage and corrosion. For complete details on the use and execution of this protocol, please refer to Sui et al. 1

CAS / MDL: 7550-35-8

研究领域: 材料科学 · 热能工程

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NATURE MATERIALS · 2024 · IF 37.2

Creep-free polyelectrolyte elastomer for drift-free iontronic sensing

He Yunfeng,Cheng Yu,Yang Canhui,Guo Chuan Fei

Artificial pressure sensors often use soft materials to achieve skin-like softness, but the viscoelastic creep of soft materials and the ion leakage, specifically for ionic conductors, cause signal drift and inaccurate measurement. Here we report drift-free iontronic sensing by designing and copolymerizing a leakage-free and creep-free polyelectrolyte elastomer containing two types of segments: charged segments having fixed cations to prevent ion leakage and neutral slippery segments with a high crosslink density for low creep. We show that an iontronic sensor using the polyelectrolyte elastomer barely drifts under an ultrahigh static pressure of 500 kPa (close to its Young’s modulus), exhibits a drift rate two to three orders of magnitude lower than that of the sensors adopting conventional ionic conductors and enables steady and accurate control for robotic manipulation. Such drift-free iontronic sensing represents a step towards highly accurate sensing in robotics and beyond.

CAS / MDL: 78-67-1 75-05-8 814-68-6 141-32-2 90076-65-6 627-18-9 128-37-0 75-09-2 174899-82-2 141-78-6 13048-33-4 7473-98-5 96-33-3 150-76-5 616-47-7 9002-89-5 7757-82-6 121-44-8

研究领域: 材料科学 · 机器人技术 · 传感器 · 聚合物化学

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ACS Applied Materials & Interfaces · 2024 · IF 8.3

Macroporous, Highly Hygroscopic, and Leakage-Free Composites for Efficient Atmospheric Water Harvesting

Zhihao Huang,Tao Zhang,Aiming Ju,Zhiguang Xu,Yan Zhao

Hygroscopic composites based on hygroscopic salts and hydrogels are promising for atmospheric water harvesting (AWH), but their relatively low water production and possible salt leakage hinder real applications. Here, we report highly hygroscopic and leakage-free composites from loading LiCl into emulsion-templated sodium alginate and poly(vinyl alcohol) hydrogels with macroporous structures and interpenetrating polymer networks. The resulting composites exhibited an enhanced moisture uptake (up to 3.4 g g–1) and leakage-free behavior even at an extremely high relative humidity (RH) of 90%. Moreover, the composites showed accelerated adsorption, with high adsorption (0.803 g g–1 water at 25 °C and 90% RH within 1 h) and desorption due to the emulsion-templated, highly interconnected macropores. The hygroscopic composites obtained 1.12 g g–1 water per adsorption–desorption collection cycle and showed high reusability, without obvious deterioration in adsorption, desorption, and collection after 10 cycles. With the presence of carbon nanotubes, solar-driven AWH could be realized, without the requirement of additional energy. The highly hygroscopic and leakage-free composites with enhanced and accelerated adsorption and desorption are excellent candidates for efficient AWH.

CAS / MDL: 110-54-3 7447-41-8 9002-89-5

研究领域: 材料科学 · 环境科学 · 化学工程

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Protocol to develop a moisture-desorptive passive cooling system for electronics thermal management

Creep-free polyelectrolyte elastomer for drift-free iontronic sensing

Macroporous, Highly Hygroscopic, and Leakage-Free Composites for Efficient Atmospheric Water Harvesting