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Highly oriented BN-based TIMs with high through-plane thermal conductivity and low compression modulus 具有高通面热导率和低压缩模量的高取向 BN 基 TIMs
IF 13.3 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-07-17 DOI: 10.1039/d4mh00626g
rongjie yang, Yandong Wang, Zhenbang Zhang, kang xu, Linhong Li, Yong Cao, Maohua Li, Jianxiang Zhang, Yue Qin, Boda Zhu, Yingying Guo, zhou yiwei, Tao Cai, Cheng-Te Lin, Kazuhito Nishimura, Xue Chen, Nan Jiang, Jinhong Yu
In the pursuit of effective thermal management for electronic devices, it is crucial to develop insulation thermal interface materials (TIMs) that exhibit exceptional through-plane thermal conductivity, low thermal resistance, and minimal compression modulus. Boron Nitride (BN), given its outstanding thermal conduction and insulation properties, has garnered significant attention as a potential material for this purpose. However, previously reported BN-based composites have consistently demonstrated through-plane thermal conductivity below 10 W m-1 K-1 and high compression modulus, whilst also presenting challenges in terms of mass production. In this study, low molecular weight polydimethylsiloxane (PDMS) and large-size BN were utilized as the foundational materials. Utilizing a rolling-curing integrated apparatus, we successfully accomplished the continuous preparation of large-sized, high-adhesion BN films. Subsequent implementation of stacking, cold pressing, and vertical cutting techniques enabled the attainment of a remarkable BN-based TIM, characterized by an unprecedented through-plane thermal conductivity of up to 12.11 W m-1 K-1, remarkably low compression modulus (55 kPa), and total effective thermal resistance (0.16 oC in2/W, 50 Psi). During the TIMs performance evaluation, our TIMs demonstrated superior heat dissipation capabilities compared with commercial TIMs. At a heating power density of 40 W/cm2, the steady-state temperature of the ceramic heating element was found to be 10 °C lower than that of the commercial TIMs. This pioneering feat not only contributes valuable technical insights for the development of high-performance insulating TIMs but also establishes a solid foundation for widespread implementation in thermal management applications across a range of electronic devices.
为了对电子设备进行有效的热管理,必须开发出具有出色的通面导热性、低热阻和最小压缩模量的绝缘热界面材料(TIM)。氮化硼(BN)具有出色的热传导和绝缘性能,作为一种潜在的材料,已引起人们的极大关注。然而,之前报道的基于 BN 的复合材料一直表现出低于 10 W m-1 K-1 的通面热导率和较高的压缩模量,同时也给大规模生产带来了挑战。本研究采用低分子量聚二甲基硅氧烷(PDMS)和大尺寸 BN 作为基础材料。利用滚动固化集成设备,我们成功地连续制备出了大尺寸、高附着力的 BN 薄膜。随后采用堆叠、冷压和垂直切割技术,成功制备出了出色的 BN 基 TIM,其特点是前所未有的通面热导率高达 12.11 W m-1 K-1,压缩模量极低(55 kPa),总有效热阻为 0.16 oC in2/W,50 Psi。在 TIM 性能评估过程中,与商用 TIM 相比,我们的 TIM 表现出更出色的散热能力。在加热功率密度为 40 W/cm2 时,陶瓷加热元件的稳态温度比商用 TIM 低 10 °C。这一开创性成果不仅为开发高性能绝缘 TIM 提供了宝贵的技术见解,而且为广泛应用于各种电子设备的热管理应用奠定了坚实的基础。
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引用次数: 0
Photo-Controllable Microcleaner: Photo-Induced Crawling Motion and Particle Transport of Azobenzene Crystals on a Liquid-Like Surface 光控微型清洁器:类液体表面上偶氮苯晶体的光诱导爬行运动和粒子传输
IF 13.3 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-07-17 DOI: 10.1039/d4mh00455h
Makoto Saikawa, Mio Ohnuma, Kengo Manabe, Koichiro Saito, Yoshihiro Kikkawa, Yasuo Norikane
Organic crystals of 3,3’-dimethylazobenzene (DMAB) exhibit photo-induced crawling motion on solid surfaces when they are simultaneously irradiated with ultraviolet and visible light from opposite directions. DMAB crystals are candidates for light-driven cargo transporters having simple chemical compositions and material structures. However, fast crawling motion without significant shape deformation has not yet been achieved. In this study, compared with hydrophilic glass and conventional hydrophobic surfaces with alkyl chains, siloxane-based hybrid surfaces, which are “liquid-like surfaces,” result in the fastest crawling motion (4.2m min−1) while a droplet-like shape of DMAB crystals is maintained. Additionally, we successfully demonstrate that the DMAB crystals are capable of capturing and carrying silica particles on the hybrid surface. The transport direction is changed on demand without releasing the particles by simply changing the irradiation direction. The particles can be left on the substrate by removing the DMAB crystals via sublimation at room temperature. This result showcases a new concept of “photo-controllable microcleaner” that can operate a series of cargo capture–carry–release tasks. We expect this transporter to contribute to the development of crystal actuators, microfluidics, and microscale molecular flasks/reactors.
当 3,3'-二甲基偶氮苯(DMAB)的有机晶体同时受到来自相反方向的紫外线和可见光照射时,会在固体表面表现出光诱导的爬行运动。DMAB 晶体具有简单的化学成分和材料结构,是光驱动货物运输器的候选材料。然而,目前尚未实现无明显形状变形的快速爬行运动。在这项研究中,与亲水性玻璃和传统的带有烷基链的疏水性表面相比,硅氧烷基混合表面(即 "类液体表面")可实现最快的爬行运动(4.2m min-1),同时保持 DMAB 晶体的液滴状形状。此外,我们还成功证明了 DMAB 晶体能够捕捉并携带混合表面上的二氧化硅颗粒。只需改变辐照方向,就能按需改变传输方向,而不会释放颗粒。在室温下,通过升华移除 DMAB 晶体,可将颗粒留在基底上。这一成果展示了 "光控微型清洁器 "的新概念,它可以执行一系列货物捕获-携带-释放任务。我们期待这种运输器能为晶体致动器、微流体和微尺度分子烧瓶/反应器的开发做出贡献。
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引用次数: 0
The trade-off anionic modulation in metal–organic glasses showing color-tunable persistent luminescence 显示颜色可调持久发光的金属有机玻璃中的权衡阴离子调制
IF 13.3 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-07-16 DOI: 10.1039/d4mh00771a
Tianhong Chen, Yu-Juan Ma, Guowei Xiao, Xiaoyu Fang, Yumin Liu, Kangjing Li, Dongpeng Yan
Ultralong room-temperature phosphorescence (RTP) and thermally active delayed fluorescence (TADF) materials provide exciting opportunities for the rational design of persistent luminescence owing to their long-lived excitons. However, conventional rare-earth-based all-inorganic emitters involve high cost and harsh synthesis conditions, and purely organic systems may require complicated synthesis routes and tedious purification. Therefore, it is highly desirable to discover a cost-effective and easily manufacturable method for achieving color-tunable RTP-TADF with long afterglow. Herein, we demonstrate a rational strategy to introduce different anions (Cl−, Br− and OAc− ions) into the Zn-based metal–organic scaffold, which can improve the crystal rigidity and achieve the well-balanced RTP-TADF. Both theoretical and experimental studies have demonstrated that the adjustment of different anions can effectively modulate the spin-orbit coupling (SOC) and the energy gap of singlet-triplet states (ΔEST), and then tailor the afterglow lifetime. Moreover, we prepared dye-doped metal-organic hybrid glasses with remarkable potential for color-tunable afterglow. Therefore, this work not only provides new horizon for modulating crystal and glass states with color/lifetime-tunable persistent luminescence, but also contributes to optical information storage and anti-counterfeiting technology.
超长室温磷光(RTP)和热激活延迟荧光(TADF)材料因其长寿命激子而为持久发光的合理设计提供了令人兴奋的机会。然而,传统的稀土基全无机发光体成本高、合成条件苛刻,而纯有机体系可能需要复杂的合成路线和繁琐的纯化过程。因此,我们非常希望能找到一种成本低廉、易于制造的方法来实现具有长余辉的颜色可调 RTP-TADF 。在此,我们展示了一种合理的策略,即在 Zn 基金属有机支架中引入不同的阴离子(Cl-、Br- 和 OAc-离子),从而提高晶体的刚性,实现均衡的 RTP-TADF 。理论和实验研究都证明,调整不同的阴离子可以有效地调节自旋轨道耦合(SOC)和单线态-三线态的能隙(ΔEST),进而定制余辉寿命。此外,我们还制备了掺杂染料的金属有机杂化玻璃,具有显著的余辉颜色可调潜力。因此,这项工作不仅为调制具有颜色/寿命可调的持续发光的晶体和玻璃态提供了新的视角,而且还为光学信息存储和防伪技术做出了贡献。
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引用次数: 0
Ellagic Acid-Modified Gold Nanoparticles to Combat Multi-Drug Resistant Bacterial Infections In Vitro and In Vivo 鞣花酸修饰的金纳米粒子用于体外和体内抗多重耐药细菌感染的研究
IF 13.3 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-07-11 DOI: 10.1039/d4mh00642a
Yaran Wang, Fan Wu, Yuanfeng Li, Siran Wang, Yijin Ren, Linqi Shi, Henny C. Van der Mei, Yong Liu
The overuse of antibiotics has led to the rapid development of multi-drug resistant bacteria, making antibiotics increasingly ineffective against bacterial infections. Consequently, there is an urgent need to develop alternative strategies to combat multi-drug-resistant bacterial infections. In this study, gold nanoparticles modified with ellagic acid (EA-AuNPs) were prepared using a simple and mild one-pot hydrothermal process. EA-AuNPs demonstrated high bactericidal efficacy and broad-spectrum antimicrobial activities against clinical isolates of the antibiotic-resistant ESKAPE pathogens. Furthermore, EA-AuNPs effectively disperse biofilms of multi-drug-resistant bacteria. Additionally, EA-AuNPs mitigated inflammatory responses at the bacterial infection sites. The combined bactericidal and anti-inflammatory treatment with EA-AuNPs resulted in faster curing of peritonitis caused by Staphylococcus aureus in mice compared to treatment with free EA or gentamicin. Moreover, transcriptome analysis revealed that EA-AuNPs exhibited a multi-targeting mechanism, making resistance development in pathogens more challenging than traditional antibiotics that recognize specific cellular targets. Overall, EA-AuNPs emerged as a promising antimicrobial agent against multi-drug-resistant bacterial infections.
抗生素的过度使用导致耐多药细菌的迅速发展,使抗生素对细菌感染越来越无效。因此,迫切需要开发替代策略来对抗多重耐药细菌感染。本研究采用简单温和的一锅水热法制备了鞣花酸修饰的金纳米粒子(EA-AuNPs)。EA-AuNPs 对抗生素耐药 ESKAPE 病原体的临床分离物具有很高的杀菌效力和广谱抗菌活性。此外,EA-AuNPs 还能有效驱散多重耐药菌的生物膜。此外,EA-AuNPs 还能减轻细菌感染部位的炎症反应。与使用游离 EA 或庆大霉素治疗相比,使用 EA-AuNPs 结合杀菌和消炎治疗能更快地治愈由金黄色葡萄球菌引起的小鼠腹膜炎。此外,转录组分析表明,EA-AuNPs 具有多靶点机制,与识别特定细胞靶点的传统抗生素相比,更能激发病原体的抗药性。总之,EA-AuNPs 是一种很有前景的抗菌剂,可用于治疗多重耐药细菌感染。
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引用次数: 0
Triphenylphosphonium-modified catiomers enhance in vivo mRNA delivery through stabilized polyion complexation. 三苯基膦修饰的催产素通过稳定的多离子复合物增强体内 mRNA 的传递。
IF 12.2 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-07-11 DOI: 10.1039/d4mh00325j
Jumpei Norimatsu, Hayato L Mizuno, Takayoshi Watanabe, Takumi Obara, Makoto Nakakido, Kouhei Tsumoto, Horacio Cabral, Daisuke Kuroda, Yasutaka Anraku

Nanocarriers based on cationic materials play a central role in the success of mRNA-based therapies. Traditionally, amine-bearing lipids and polymers have been successfully employed for creating mRNA-loaded nanocarriers, though they still present challenges, such as physical and biological instability, limiting both delivery efficiency and therapeutic potential. Non-amine cations could be a promising avenue in addressing these limitations. However, such alternatives remain notably underexplored. Herein, we introduced triphenylphosphonium (TPP) as an alternative cationic moiety for mRNA delivery, leveraging its advantageous properties for nucleic acid complexation. Through the modification of amine-bearing catiomers, we replaced traditional amine-based counterparts with TPP to create innovative polymeric micelles as mRNA nanocarriers. A comprehensive analysis, encompassing physicochemical, thermodynamic, and computational approaches, revealed that the TPP substitution significantly influenced polymer self-assembly, mRNA binding, and the overall stability of mRNA-loaded polymeric micelles. Upon intravenous injection, TPP-bearing micelles demonstrated a remarkable increase in mRNA bioavailability, facilitating efficient protein production in solid tumors. These findings provide a compelling rationale for substituting amines with TPP, emphasizing their potential for advancing mRNA therapeutics.

以阳离子材料为基础的纳米载体在基于 mRNA 的疗法取得成功方面发挥着核心作用。传统上,含胺脂质和聚合物已被成功用于制造负载 mRNA 的纳米载体,但它们仍然存在物理和生物不稳定性等挑战,限制了递送效率和治疗潜力。非胺阳离子可能是解决这些限制的一个有前途的途径。然而,对此类替代品的探索仍显不足。在此,我们利用三苯基膦(TPP)在核酸复合方面的优势特性,将其引入 mRNA 递送的阳离子分子中。通过改性含胺的同系物,我们用 TPP 取代了传统的胺基同系物,创造出创新的聚合物胶束作为 mRNA 纳米载体。一项涵盖物理化学、热力学和计算方法的综合分析表明,TPP 取代显著影响了聚合物的自组装、mRNA 结合以及载入 mRNA 的聚合物胶束的整体稳定性。经静脉注射后,含 TPP 的胶束显著提高了 mRNA 的生物利用率,促进了实体瘤蛋白质的高效生产。这些发现为用 TPP 替代胺提供了令人信服的理由,强调了 TPP 在推进 mRNA 治疗方面的潜力。
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引用次数: 0
Sodium Alginate-Based Coaxial Fibers Synergistically Integrate Moisture Actuation, Length Tracing, Humidity Sensing, and Electric Heating 藻酸钠同轴光纤协同集成了湿度驱动、长度追踪、湿度感应和电加热功能
IF 13.3 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-07-11 DOI: 10.1039/d4mh00631c
Lizhong Dong, Ming Ren, Yulian Wang, Xiaojie Yuan, Xiaobo Wang, Guan Yang, Yuxin Li, Wei Li, Yunfeng Shao, Guanlong Qiao, Weiwei Li, Hongli Sun, Jiangtao Di, Qingwen Li
The development of wearable electronics has driven the need for smart fibers with advanced multifunctional synergy. In this paper, we present a design of a multifunctional coaxial fiber that is composed of a biopolymer-derived core and an MXene/silver nanowires (AgNWs) sheath by wet spinning. The fiber synergistically integrates moisture actuation, length tracing, humidity sensing, and electric heating, making it highly promising for portable devices and protective systems. The biopolymer-derived core provides deformation for moisture-sensitive actuation, while the MXene/AgNWs sheath with good conductivity enables the fiber to perform electric heating, humidity sensing, and self-sensing actuation. The coaxial fiber can be programmed to rapidly desorb water molecules to shrink to its original length by using the MXene/AgNWs sheath as an electrical heater. We demonstrate proof-of-concept applications based on the multifunctional fibers for thermal physiotherapy and wound healing/monitoring. The sodium alginate@MXene-based coaxial fiber presents a promising solution for the next-generation of smart wearable electronics.
可穿戴电子设备的发展推动了对具有先进多功能协同作用的智能纤维的需求。在本文中,我们介绍了一种多功能同轴光纤的设计,该光纤通过湿法纺丝由生物聚合物芯和 MXene/银纳米线(AgNWs)鞘组成。这种光纤协同整合了湿度驱动、长度追踪、湿度感应和电加热功能,因此在便携式设备和保护系统中大有可为。源自生物聚合物的纤芯可为湿敏驱动提供变形,而具有良好导电性的 MXene/AgNWs 护套可使光纤实现电加热、湿度感应和自感应驱动。通过使用 MXene/AgNWs 护套作为电加热器,可对同轴光纤进行编程,使其迅速解吸水分子,从而收缩到原来的长度。我们展示了基于多功能纤维的概念验证应用,用于热理疗和伤口愈合/监测。基于海藻酸钠@MXene 的同轴纤维为下一代智能可穿戴电子产品提供了一种前景广阔的解决方案。
{"title":"Sodium Alginate-Based Coaxial Fibers Synergistically Integrate Moisture Actuation, Length Tracing, Humidity Sensing, and Electric Heating","authors":"Lizhong Dong, Ming Ren, Yulian Wang, Xiaojie Yuan, Xiaobo Wang, Guan Yang, Yuxin Li, Wei Li, Yunfeng Shao, Guanlong Qiao, Weiwei Li, Hongli Sun, Jiangtao Di, Qingwen Li","doi":"10.1039/d4mh00631c","DOIUrl":"https://doi.org/10.1039/d4mh00631c","url":null,"abstract":"The development of wearable electronics has driven the need for smart fibers with advanced multifunctional synergy. In this paper, we present a design of a multifunctional coaxial fiber that is composed of a biopolymer-derived core and an MXene/silver nanowires (AgNWs) sheath by wet spinning. The fiber synergistically integrates moisture actuation, length tracing, humidity sensing, and electric heating, making it highly promising for portable devices and protective systems. The biopolymer-derived core provides deformation for moisture-sensitive actuation, while the MXene/AgNWs sheath with good conductivity enables the fiber to perform electric heating, humidity sensing, and self-sensing actuation. The coaxial fiber can be programmed to rapidly desorb water molecules to shrink to its original length by using the MXene/AgNWs sheath as an electrical heater. We demonstrate proof-of-concept applications based on the multifunctional fibers for thermal physiotherapy and wound healing/monitoring. The sodium alginate@MXene-based coaxial fiber presents a promising solution for the next-generation of smart wearable electronics.","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":null,"pages":null},"PeriodicalIF":13.3,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141587360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Friction heat-driven robust self-lubricity of n-alkanols/epoxy resin coatings enabled by solid-liquid phase transition 通过固液相变实现摩擦热驱动的正烷醇/环氧树脂涂层的坚固自润滑性
IF 13.3 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-07-10 DOI: 10.1039/d4mh00637b
Hao Li, Cheng Cao, Yuting Li, Xiaoqiang Fan, Junhui Sun, Minhao Zhu
Due to the inherent damage effect, friction heat is commonly undesirable yet inevitable in moving components, resulting in a great challenge to obtain robust running of the mechanical assemblies under high sliding velocity. Here, we report an alternative strategy to design robust self-healing lubricity materials via taking advantage of friction heat-driven solid-liquid phase transition, by employing facile coatings of n-alkanols/epoxy resin. The lubricity performance of the composite coatings enhances with sliding velocity, leading to the low friction coefficient 0.066 and wear rate 1.968×10-7 mm3/N·m under 5000 rpm. The low friction is mainly attributed to the controlled phase transition characteristics of n-alkanols, which absorb the friction heat to release liquid n-alkanols for maintaining the intelligent shear interfaces. While the low wear is ascribed to the high load-bearing capacity and self-healing property of the composite coatings. This study may thus open the common framework to rationally design self-healing lubricant materials via solid-liquid phase transition by utilizing the undesirable yet inevitable friction heat, for achieving robustly ultralow friction and wear of moving components under harsh working conditions.
由于固有的损坏效应,摩擦热通常是运动部件中不可避免的不良现象,这给机械组件在高滑动速度下的稳健运行带来了巨大挑战。在此,我们报告了利用摩擦热驱动的固液相变设计坚固的自修复润滑材料的另一种策略,即采用正烷醇/环氧树脂的简易涂层。复合涂层的润滑性能随着滑动速度的提高而增强,因此在 5000 转/分钟的转速下,摩擦系数为 0.066,磨损率为 1.968×10-7 mm3/N-m。摩擦系数低的主要原因是正构烷醇的可控相变特性,它吸收摩擦热,释放出液态正构烷醇,以保持智能剪切界面。而低磨损则归因于复合涂层的高承载能力和自修复特性。因此,这项研究为通过固液相变合理设计自愈合润滑材料开辟了一个共同框架,即利用不可取但不可避免的摩擦热,在恶劣的工作条件下实现运动部件的超低摩擦和磨损。
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引用次数: 0
Controlling conjugated polymer morphology by precise oxygen position in single-ether side chains 通过单醚侧链中精确的氧位置控制共轭聚合物形态
IF 13.3 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-07-10 DOI: 10.1039/d4mh00492b
Pablo Durand, Huiyan Zeng, Jismy Badr, Olivier Boyron, Benoît Heinrich, Laurent Herrmann, Olivier Bardagot, Ioannis Moutsios, Alina Maryasevskaya, Alexey Melnikov, Dimitri A. Ivanov, Martin Brinkmann, Nicolas Leclerc
Recently, polar side chains have emerged as a functional tool to enhance conjugated polymer doping properties by improving the polymer miscibility with polar chemical dopants and facilitate solvated ion uptake. In this work, we design and investigate a novel family of side chains containing a single ether function, enabling the modulation of the oxygen atom position along the side chain. A meticulous investigation of this new polymer series by differential scanning calorimetry, fast scanning chip calorimetry and X-ray scattering shows that polymers bearing single-ether side chains can show high degree of crystallinity under proper conditions. Importantly, due to a gauche effect allowing the side chain to bend at the oxygen atom, the degree of crystallinity of polymers can be controlled by the position of the oxygen atom along the side chain. The further the oxygen atom is from the conjugated backbone, the more crystalline the polymer becomes. In addition, for all new polymers, high thermomechanical properties are demonstrated, leading to remarkable electrical conductivities and thermoelectric power factors. This work confirms the potential of single-ether side chains to be used as polar solubilizing side chains for the design of a next generation of p- and n-type semiconducting polymers with increased affinity to polar dopants while maintaining high molecular order.
最近,极性侧链已成为一种功能性工具,可通过改善聚合物与极性化学掺杂剂的混溶性和促进溶解离子的吸收来增强共轭聚合物的掺杂性能。在这项工作中,我们设计并研究了一种含有单一醚功能的新型侧链系列,这种侧链可以沿侧链调节氧原子的位置。通过差示扫描量热法、快速扫描芯片量热法和 X 射线散射法对这种新型聚合物系列进行的细致研究表明,在适当条件下,含有单醚侧链的聚合物可以显示出很高的结晶度。重要的是,由于侧链可以在氧原子处弯曲的高切效应,聚合物的结晶度可以通过氧原子沿侧链的位置来控制。氧原子距离共轭骨架越远,聚合物的结晶度就越高。此外,所有新型聚合物都具有很高的热机械性能,因而具有显著的导电性和热电功率因数。这项工作证实了单醚侧链作为极性增溶侧链的潜力,可用于设计下一代 p 型和 n 型半导体聚合物,在保持高分子有序的同时,提高对极性掺杂剂的亲和力。
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引用次数: 0
Synergistically Enhanced Discharged Energy Density and Efficiency Achieved in Designed Polyetherimide-based Composites via Asymmetrical Interlayer Structure Induced Optimized Interface Effectiveness 设计聚醚酰亚胺基复合材料通过非对称层间结构诱导的优化界面效应实现协同增强的放电能量密度和效率
IF 13.3 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-07-10 DOI: 10.1039/d4mh00629a
Yongjing Zhang, Ying Lin, Yanlong Ma, Qibin Yuan, Haibo Yang
The continuous advancement in energy storage technologies necessitates the iteration of energy storage dielectrics urgently. However, the current state-of-the-art composite films fail to meet the application requirements of energy storage devices, which demand a combination of high discharged energy density (Ue), high energy storage efficiency (η), and excellent high-temperature performance. To address this challenge, we present an innovative interlayer composed of pure BN nanosheets in polyetherimide (PEI)-based asymmetrical multilayered composites doped with Na0.5Bi0.5TiO3 ceramic fibers. This innovative structure confers the PEI-based composites upon synergistic optimization of polarization intensity, breakdown strength and energy loss by designed interface effectiveness adopting tailored filler and interface configuration as modulation means, which can be further confirmed by finite element simulations and comparative experiments. The resultant composite film achieves an excellent Ue of 22.95 J·cm-3 and an ultra-high η of 96.81% at ambient temperature, along with high-temperature performances of 12.88 J·cm-3 and 79.26% at 150 °C, surpassing all previously reported polymer films in terms of both metrics. This study provides new insights for developing high-performance energy storage dielectrics suitable for practical applications.
随着储能技术的不断进步,储能电介质的更新换代迫在眉睫。然而,目前最先进的复合薄膜无法满足储能设备的应用要求,即需要同时具备高放电能量密度(Ue)、高储能效率(η)和优异的高温性能。为了应对这一挑战,我们在基于聚醚酰亚胺(PEI)的掺杂 Na0.5Bi0.5TiO3 陶瓷纤维的非对称多层复合材料中提出了一种由纯 BN 纳米片组成的创新夹层。这种创新结构使 PEI 基复合材料在极化强度、击穿强度和能量损耗方面获得了协同优化,其设计界面的有效性采用了量身定制的填料和界面配置作为调制手段,这可以通过有限元模拟和对比实验得到进一步证实。由此制备的复合薄膜在常温下实现了 22.95 J-cm-3 的优异 Ue 值和 96.81% 的超高 η 值,在 150 °C 时实现了 12.88 J-cm-3 的高温性能和 79.26% 的超高 η 值,在这两项指标上都超过了之前报道的所有聚合物薄膜。这项研究为开发适合实际应用的高性能储能电介质提供了新的见解。
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引用次数: 0
Unveiling the Potential of Amorphous Nanocatalysts in Membrane-based Hydrogen Production 揭示非晶纳米催化剂在膜制氢中的潜力
IF 13.3 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-07-09 DOI: 10.1039/d4mh00589a
Yifei Liu, Qi Hu, Xiuyi Yang, Jianxin Kang
Hydrogen, as a clean and renewable energy source, is a promising candidate to replace fossil fuels and alleviate the environmental crisis. Compared with the traditional H-type cells with finite-gap, the design of membrane electrode can reduce the gas transmission resistance, enhance the current density, and improve the efficiency of hydrogen production. However, the harsh environment in the electrolyser makes the membrane electrode based water electrolysis technology still limited by the lack of catalyst activity and stability of the working conditions. Due to the abundant active sites and structural flexibility, amorphous nanocatalysts are alternatives. In this paper, we review the recent research progress of amorphous nanomaterials as electrocatalysts for hydrogen production by electrolysis at membrane electrodes, illustrate and discuss their structural advantages in membrane electrode catalytic systems, as well as explore the significance of the amorphous structure for the development of membrane electrode systems. Finally, the article also looks at future opportunities and adaptations of amorphous catalysts for hydrogen production at membrane electrodes. The authors hope that this review will deepen the understanding of the potential of amorphous nanomaterials in electrochemical hydrogen production and facilitate future nanomaterials research and new sustainable pathways for hydrogen production.
氢气作为一种清洁的可再生能源,有望取代化石燃料,缓解环境危机。与传统的有限间隙 H 型电池相比,膜电极的设计可以降低气体传输电阻,提高电流密度,提高制氢效率。然而,由于电解槽环境恶劣,基于膜电极的水电解技术仍受到催化剂活性和工作条件稳定性不足的限制。由于非晶态纳米催化剂具有丰富的活性位点和结构上的灵活性,因此是一种替代性催化剂。本文回顾了近年来非晶纳米材料作为膜电极电解制氢电催化剂的研究进展,阐述并讨论了其在膜电极催化系统中的结构优势,并探讨了非晶结构对膜电极系统发展的意义。最后,文章还探讨了非晶催化剂在膜电极制氢中的未来机遇和适应性。作者希望这篇综述能加深人们对非晶纳米材料在电化学制氢中的潜力的理解,并促进未来的纳米材料研究和新的可持续制氢途径。
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引用次数: 0
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