{"title":"Pickering乳液驱动的MXene/丝素水凝胶具有可编程功能网络,用于电磁干扰屏蔽和太阳能蒸发。","authors":"Guang Yin,Jing Wu,Chengzhang Qi,Xinfeng Zhou,Zhong-Zhen Yu,Hao-Bin Zhang","doi":"10.1007/s40820-025-01818-w","DOIUrl":null,"url":null,"abstract":"Flexible and conformable nanomaterial-based functional hydrogels find promising applications in various fields. However, the controllable manipulation of functional electron/mass transport networks in hydrogels remains rather challenging to realize. We describe a general and versatile surfactant-free emulsion construction strategy to customize robust functional hydrogels with programmable hierarchical structures. Significantly, the amphipathy of silk fibroin (SF) and the reinforcement effect of MXene nanosheets produce sable Pickering emulsion without any surfactant. The followed microphase separation and self-cross-linking of the SF chains induced by the solvent exchange convert the composite emulsions into high-performance hydrogels with tunable microstructures and functionalities. As a proof-of-concept, the controllable regulation of the ordered conductive network and the water polarization effect confer the hydrogels with an intriguing electromagnetic interference shielding efficiency (~ 64 dB). Also, the microstructures of functional hydrogels are modulated to promote mass/heat transfer properties. The amino acids of SF and the surface terminations of MXene help reduce the enthalpy of water evaporation and the hierarchical structures of the hydrogels accelerate evaporation process, expecting far superior evaporation performance (~ 3.5 kg m⁻2 h⁻1) and salt tolerance capability compared to other hydrogel evaporators. 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引用次数: 0
摘要
具有柔性和相容性的纳米材料基功能水凝胶在各个领域都有很好的应用前景。然而,对水凝胶中功能电子/质量输运网络的可控操纵仍然是相当具有挑战性的。我们描述了一种通用和通用的无表面活性剂乳液构建策略,以定制具有可编程分层结构的强大功能水凝胶。值得注意的是,丝素蛋白(SF)的亲和性和MXene纳米片的增强作用产生了不需要任何表面活性剂的紫貂皮克林乳。随后的微相分离和溶剂交换诱导的SF链自交联将复合乳液转化为具有可调微结构和功能的高性能水凝胶。作为概念验证,有序导电网络的可控调节和水极化效应使水凝胶具有良好的电磁干扰屏蔽效率(~ 64 dB)。此外,调节功能水凝胶的微观结构,以提高传质/传热性能。SF的氨基酸和MXene的表面末端有助于降低水的蒸发焓,而水凝胶的层次结构加速了蒸发过程,与其他水凝胶蒸发器相比,期望有更好的蒸发性能(~ 3.5 kg m - 2 h - 1)和耐盐能力。我们的发现为生产具有集成结构依赖性质的功能性水凝胶装置提供了大量机会。
Pickering Emulsion-Driven MXene/Silk Fibroin Hydrogels with Programmable Functional Networks for EMI Shielding and Solar Evaporation.
Flexible and conformable nanomaterial-based functional hydrogels find promising applications in various fields. However, the controllable manipulation of functional electron/mass transport networks in hydrogels remains rather challenging to realize. We describe a general and versatile surfactant-free emulsion construction strategy to customize robust functional hydrogels with programmable hierarchical structures. Significantly, the amphipathy of silk fibroin (SF) and the reinforcement effect of MXene nanosheets produce sable Pickering emulsion without any surfactant. The followed microphase separation and self-cross-linking of the SF chains induced by the solvent exchange convert the composite emulsions into high-performance hydrogels with tunable microstructures and functionalities. As a proof-of-concept, the controllable regulation of the ordered conductive network and the water polarization effect confer the hydrogels with an intriguing electromagnetic interference shielding efficiency (~ 64 dB). Also, the microstructures of functional hydrogels are modulated to promote mass/heat transfer properties. The amino acids of SF and the surface terminations of MXene help reduce the enthalpy of water evaporation and the hierarchical structures of the hydrogels accelerate evaporation process, expecting far superior evaporation performance (~ 3.5 kg m⁻2 h⁻1) and salt tolerance capability compared to other hydrogel evaporators. Our findings open a wealth of opportunities for producing functional hydrogel devices with integrated structure-dependent properties.
期刊介绍:
Nano-Micro Letters is a peer-reviewed, international, interdisciplinary, and open-access journal published under the SpringerOpen brand.
Nano-Micro Letters focuses on the science, experiments, engineering, technologies, and applications of nano- or microscale structures and systems in various fields such as physics, chemistry, biology, material science, and pharmacy.It also explores the expanding interfaces between these fields.
Nano-Micro Letters particularly emphasizes the bottom-up approach in the length scale from nano to micro. This approach is crucial for achieving industrial applications in nanotechnology, as it involves the assembly, modification, and control of nanostructures on a microscale.