Composites Science and Technology最新文献_第8页

“Reinforced concrete” design of robust mineralized cellulose composite with multilayered structure for efficient CO2 capture and passive radiative cooling ability 具有多层结构的坚固矿化纤维素复合材料的 "钢筋混凝土 "设计，可有效捕获二氧化碳并具有被动辐射冷却能力

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2024-09-27 DOI: 10.1016/j.compscitech.2024.110886

Chengling Huang, Hou-Yong Yu, Guozhuo Chen, Yiqi Liao

The construction industry promotes the economic development of the country by addressing society's housing needs. However, the industry's energy consumption and carbon dioxide (CO₂) emissions are the primary contributors to global warming. Traditional building materials are no longer capable of meeting the requirements of sustainable development, while natural cellulose can be used as a new type of carbon capture construction material. Inspired by the “reinforced concrete” methodology, a mineralized cellulose composite (ML-CCM) was fabricated through a strategy of vacuum filling and in-situ mineralization, resulting in a composite with a multi-level structure (a natural microporous 3D scaffold loofah as “rebar” and cellulose filler as “cement” are staggered in the composite). The resultant ML-CCM1 exhibited a significantly high flexural strain (approximately 215.9 % of that of cellulose composite without loofah) because of the 3D scaffold loofah acting as a “rebar”. Furthermore, the composite possesses flame retardancy, superior thermal insulation at 90 °C, and passive radiative cooling performance due to the micro-nano ZnO particle in the “cement”. Moreover, the multi-level structure, consisting of pores and micro-nano particles, enables it to effectively adsorb CO₂ and environment tobacco smoke. As a result, lifecycle assessments underscore the composite's low Global Warming Potential. Therefore, this work reports a promising 3D bio-based composite with CO₂ capture for energy conservation and carbon reduction in the construction industry.

建筑业通过满足社会的住房需求促进了国家的经济发展。然而，该行业的能源消耗和二氧化碳（CO2）排放是导致全球变暖的主要因素。传统的建筑材料已无法满足可持续发展的要求，而天然纤维素可以作为一种新型的碳捕获建筑材料。受 "钢筋混凝土 "方法的启发，通过真空填充和原位矿化的策略，制造出了矿化纤维素复合材料（ML-CCM），形成了多层次结构的复合材料（天然微孔三维支架丝瓜络作为 "钢筋"，纤维素填料作为 "水泥"，在复合材料中交错排列）。由于三维支架丝瓜络起到了 "螺纹钢 "的作用，因此制成的 ML-CCM1 显示出明显较高的挠曲应变（约为不含丝瓜络的纤维素复合材料的 215.9%）。此外，由于 "水泥 "中含有微纳米 ZnO 颗粒，该复合材料还具有阻燃性能，在 90 ℃ 下具有优异的隔热性能和被动辐射冷却性能。此外，由孔隙和微纳米颗粒组成的多层次结构使其能够有效吸附二氧化碳和烟草烟雾。因此，生命周期评估结果表明，这种复合材料的全球变暖潜能值较低。因此，这项工作报告了一种具有二氧化碳捕获功能的三维生物基复合材料，在建筑行业节能减碳方面大有可为。

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引用次数: 0

Improving the ablation performance of largely deformed silicone rubber-based composites under coupled mechanical-thermal-oxidative conditions by implementing deformable carbon fiber fabrics 在机械-热氧化耦合条件下，通过采用可变形碳纤维织物提高大变形硅橡胶基复合材料的烧蚀性能

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2024-09-25 DOI: 10.1016/j.compscitech.2024.110876

Zhaohui Lu, Shengtai Zhou, Liwei Yan, Yue Tian, Huawei Zou, Xiancheng Ren

Silicone rubber-based composites are used as thermal protection materials due to their large deformability and excellent thermal insulation properties. In this study, two types of commercially available silicone rubbers were selected as the matrices for preparing flexible thermal protection materials. The influence of applied strain rates on the microstructure, ablation and ceramifiable behavior of silicone rubbers was studied. The research showed that the ablation performance of silicone rubbers deteriorated greatly at large strain rates. The reinforcement using deformable carbon fiber fabrics was proposed to effectively counter the deterioration of the ablative properties incurred by applying external strain. The back-face temperature reached as low as 186 °C when the samples were ablated at above 1000 °C for 50s at a strain rate of 20 %. The proposed strategy was proved helpful in developing high performance flexible thermal protection systems that exhibit promising application in the fields of aerospace and fire protection among others.

硅橡胶基复合材料具有较大的变形能力和优异的隔热性能，因此被用作热保护材料。本研究选择了两种市售硅橡胶作为制备柔性热防护材料的基体。研究了施加应变速率对硅橡胶微观结构、烧蚀和可陶瓷化行为的影响。研究表明，硅橡胶的烧蚀性能在大应变速率下会大大降低。研究人员提出了使用可变形碳纤维织物进行加固的方法，以有效解决施加外部应变导致的烧蚀性能恶化问题。当样品在应变率为 20% 的条件下于 1000°C 以上的温度下烧蚀 50 秒时，其背面温度低至 186°C。事实证明，所提出的策略有助于开发高性能柔性热保护系统，该系统在航空航天和防火等领域的应用前景广阔。

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引用次数: 0

A hyperelastic model considering the coupling of shear-compression for the forming simulation of 3D orthogonal composite preforms 考虑到剪切-压缩耦合的超弹性模型，用于三维正交复合预成型件的成型模拟

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2024-09-24 DOI: 10.1016/j.compscitech.2024.110884

Xu Zhang , Sheng Zhang , Huajun Zhang , Chenyang Liu , Yue Zhou , Chengqian Dong , Xiguang Gao , Fang Wang , Yingdong Song

The shear-compression coupling phenomenon is vital in the forming process of complex 3D woven composite components, but has not been effectively considered in existing macroscopic material models. A hyperelastic material model considering shear-compression coupling is developed here. Firstly, in-plane shear tests on pre-compressed specimens and compression tests on pre-sheared specimens were carried out, respectively. The results show that pre-compression can hinder and promote the in-plane shear deformation before and after shear locking occurs in the fabric, respectively. In-plane shear can contribute to compression. Then, a nonlinear hyperelastic constitutive model is presented and implemented in an Abaqus/Explicit user subroutine. Finally, a simulation study of the hemispherical forming of 3D orthogonal woven fabric was conducted using this model. The simulation results considering shear-compression coupling show more accurate in-plane shear angles and edge shapes compared to those without considering coupling. Moreover, since the shear-compression coupling is considered, the friction between the fabric and the tool needs to be reasonably discussed in the moulding simulation.

剪切-压缩耦合现象在复杂的三维编织复合材料部件的成型过程中至关重要，但现有的宏观材料模型并未有效考虑这一现象。本文建立了一个考虑剪切-压缩耦合的超弹性材料模型。首先，分别对预压缩试样进行了平面内剪切试验，对预剪切试样进行了压缩试验。结果表明，在织物发生剪切锁定之前和之后，预压缩分别会阻碍和促进面内剪切变形。面内剪切可促进压缩。然后，介绍了一种非线性超弹性结构模型，并在 Abaqus/Explicit 用户子程序中实现了该模型。最后，使用该模型对三维正交编织物的半球成型进行了仿真研究。与未考虑耦合的仿真结果相比，考虑了剪切-压缩耦合的仿真结果显示了更精确的平面内剪切角和边缘形状。此外，由于考虑了剪切-压缩耦合，因此在成型模拟中需要合理讨论织物与工具之间的摩擦。

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引用次数: 0

A super-stretchable conductive film with strain-insensitive conductivity for stretchable EMI shielding materials and wearable capacitive strain sensors 用于可拉伸 EMI 屏蔽材料和可穿戴电容式应变传感器的具有应变敏感导电性的超拉伸导电薄膜

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2024-09-24 DOI: 10.1016/j.compscitech.2024.110877

Yinfeng Liu , Tong Wang , Jing Wang , Xin Chen , Jianwen Chen , Zunfeng Liu , Yutian Zhu

Strain-insensitive conductive films as stretchable electromagnetic interference (EMI) shielding materials and stretchable electrodes are highly desired in wearable electronics. However, fabricating super strain-insensitive conductive films under a tensile strain higher than 400 % is still a great challenge. Herein, a super-stretchable conductive film based on the crumple-structured Ti₃C₂T_x nanosheets-single walled carbon nanotubes/stretchable substrate double-layers is designed for the stretchable EMI shielding materials and electrodes. The resulting film exhibits a strain-insensitive electrical conductivity as high as 3.01 × 10³ S/m even at a strain up to 500 %, which endows the film with a high and stable electromagnetic interference shielding efficiency (EMI SE) value of ∼45 dB. More interestingly, the EMI SE value of the film remains nearly constant even after 2000 cycles of 500 % tensile strain, indicating the excellent long-term service stability as a stretchable EMI shielding material. Moreover, a capacitive strain sensor with extra-wide sensing range, ultra-high stability, and excellent durability is successfully achieved by employing the as-prepared films as stretchable electrodes. This work proposes a convenient strategy of strain-insensitive conductive film aiming to design stretchable EMI shielding materials and electrodes for wearable electronics.

作为可拉伸电磁干扰（EMI）屏蔽材料和可拉伸电极的应变敏感导电薄膜在可穿戴电子设备中备受青睐。然而，在拉伸应变大于 400% 的情况下制作超应变敏感导电薄膜仍然是一项巨大的挑战。本文设计了一种基于褶皱结构 Ti3C2Tx 纳米片-单壁碳纳米管/可拉伸基底双层的超拉伸导电薄膜，用于制造可拉伸 EMI 屏蔽材料和电极。所制得的薄膜即使在应变高达 500 % 的情况下也能显示出高达 3.01 × 103 S/m 的应变敏感导电率，从而使薄膜具有高达 45 dB 的高而稳定的电磁干扰屏蔽效率（EMI SE）值。更有趣的是，该薄膜的 EMI SE 值在经过 2000 次 500 % 拉伸应变后仍几乎保持不变，这表明其作为可拉伸 EMI 屏蔽材料具有出色的长期使用稳定性。此外，利用制备的薄膜作为可拉伸电极，成功实现了具有超宽传感范围、超高稳定性和出色耐用性的电容式应变传感器。这项研究提出了一种简便的应变敏感导电薄膜设计策略，旨在为可穿戴电子设备设计可拉伸的 EMI 屏蔽材料和电极。

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引用次数: 0

Advancing structural health monitoring: Deep learning-enhanced quantitative analysis of damage in composite laminates using surface strain field 推进结构健康监测：利用表面应变场对复合材料层压板的损伤进行深度学习增强型定量分析

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2024-09-23 DOI: 10.1016/j.compscitech.2024.110880

Shiyu Li, Xuanxin Tian, Qiubo Li, Shigang Ai

Composite materials have been widely used as critical components in aerospace applications due to their excellent performance characteristics. The real-time accurate identification and quantification of various types of damage within composite material structures pose a significant challenge. This study introduces an innovative damage detection method based on strain fields, which centrally employs deep learning techniques. Utilizing the Res-Mask R–CNN, this study accurately detects and categorizes various forms of damage within composite laminates, including open holes, subsurface holes, and delamination. Moreover, this method also enables precise localization and quantification of damaged areas. A series of experiments and simulations have validated the accuracy and robustness of the network model. Damage inversion experiments demonstrate that the area error of the damaged regions has been reduced to 7.4 %, and the positional error does not exceed 3.31 mm. In simulated scenarios, the shape context distance for complex damage contours does not exceed 0.21, indicating that the critical geometric features of the damage have been successfully preserved. This study provides an effective new approach for damage detection and real-time structural health monitoring of composite laminates.

复合材料因其优异的性能特点，已被广泛用作航空航天应用中的关键部件。如何实时准确地识别和量化复合材料结构中的各类损伤是一项重大挑战。本研究介绍了一种基于应变场的创新型损伤检测方法，该方法集中采用了深度学习技术。本研究利用 Res-Mask R-CNN 准确地检测出复合材料层压板内的各种形式的损伤并对其进行分类，包括开放孔洞、次表层孔洞和分层。此外，该方法还能对受损区域进行精确定位和量化。一系列实验和模拟验证了网络模型的准确性和稳健性。损坏反演实验表明，损坏区域的面积误差已降至 7.4%，位置误差不超过 3.31 毫米。在模拟场景中，复杂损伤轮廓的形状上下文距离不超过 0.21，表明损伤的关键几何特征已被成功保留。这项研究为复合材料层压板的损伤检测和实时结构健康监测提供了一种有效的新方法。

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引用次数: 0

Curing and reinforcement effect of recovered carbon black from waste tires on brominated butyl rubber 废轮胎回收炭黑对溴化丁基橡胶的硫化和补强效果

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2024-09-23 DOI: 10.1016/j.compscitech.2024.110879

Guojie Zhang, Junjie Peng, Hanbing Wang, Yi Lu, Yong Zhang

The recycling of zinc compound from waste tires and the negative impact of zinc oxide on environment have been major challenges in rubber industry. In this study, the components and microstructure of recovered carbon black (rCB) from waste tires pyrolysis are analyzed, in which the content of the ash and zinc element is 20 % and 6.1 %, and zinc sulfide is the main zinc compound. Zinc sulfide and zinc oxide could crosslink brominated butyl rubber (BIIR), and the crosslinking effect becomes more effective in the presence of carbon black N660. BIIR can be crosslinked and reinforced by rCB in the absence of other additives. BIIR/rCB composites have similar curing behavior and mechanical properties to the BIIR composites filled with N660 and cured by zine oxide. Therefore, rCB could replace commercial carbon black N660 and zinc oxide in BIIR, and this replacement will realize the effective use of carbon black and zinc compound in rCB from waste tires and promote the sustainable development of tire industry.

从废轮胎中回收锌化合物以及氧化锌对环境的负面影响一直是橡胶工业面临的主要挑战。本研究分析了废轮胎热解回收炭黑（rCB）的成分和微观结构，其中灰分和锌元素的含量分别为 20 % 和 6.1 %，硫化锌是主要的锌化合物。硫化锌和氧化锌可以交联溴化丁基橡胶（BIIR），在炭黑 N660 的存在下交联效果更佳。在不使用其他添加剂的情况下，溴化丁基橡胶可以通过 rCB 进行交联和增强。BIIR/rCB 复合材料的固化行为和机械性能与填充 N660 并用氧化锌固化的 BIIR 复合材料相似。因此，rCB 可以替代 BIIR 中的商品炭黑 N660 和氧化锌，这种替代将实现废旧轮胎 rCB 中炭黑和锌化合物的有效利用，促进轮胎工业的可持续发展。

引用次数: 0

Fumed silica additives enables tunable wettability of the resin for improved composite bipolar plate 气相二氧化硅添加剂可调节树脂的润湿性，从而改善复合双极板的性能

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2024-09-23 DOI: 10.1016/j.compscitech.2024.110882

Jing Chen , Nan Qin , Runlin Fan , Liming Jin , Junsheng Zheng , Pingwen Ming , Cunman Zhang , Jim P. Zheng

Composite bipolar plates (CBP) composed of resin and conductive filler are critical components in proton exchange membrane fuel cell (PEMFC) for achieving mechanical strength and electrical conductivity. The conductive filler entirely enveloped by resin is of significance for the flexibility of the CBP; while connected resin blocks the continued conductive channels and thus weakens the electrical properties of CBP. Herein, we propose a trade-off method between flexibility and conductivity of the CBP by wettability regulations of the resin, in which fumed silica additives are introduced into epoxy as composite adhesives. The abundant hydrogen bonds are demonstrated to be well-formed between epoxy and fumed silica for decreasing surface free energy (SFE) between resin and graphite. As a result, the composite adhesive with 2 % fumed silica delivers moderate wettability enabling much improved CBP, which exhibits high electrical conductivity of 233.33 S cm⁻¹ as well as flexural strength of 66.4 MPa. Moreover, the CBP also delivers improved areal specific resistance (5.34 mΩ cm²), thermal conductivity (10.58 W (m K)⁻¹), and corrosion behaviors (0.0701 A cm⁻²) which guarantee the operation of the PEMFC. This work provides new insight from the wettability regulation of resins for improved CBP, which is an easy-operating method and has great potential for application in practical CBP fabrication.

由树脂和导电填料组成的复合双极板（CBP）是质子交换膜燃料电池（PEMFC）中实现机械强度和导电性能的关键部件。完全被树脂包裹的导电填料对 CBP 的柔韧性具有重要意义，而连接的树脂则会阻塞持续的导电通道，从而削弱 CBP 的电气性能。在此，我们提出了一种通过调节树脂的润湿性来权衡 CBP 的柔韧性和导电性的方法，即在环氧树脂中引入气相二氧化硅添加剂作为复合粘合剂。实验证明，环氧树脂和气相二氧化硅之间形成了丰富的氢键，从而降低了树脂和石墨之间的表面自由能（SFE）。因此，含有 2% 气相二氧化硅的复合粘合剂具有适度的润湿性，从而大大提高了 CBP 的性能，表现出 233.33 S cm-1 的高导电性和 66.4 MPa 的抗折强度。此外，CBP 还改善了比电阻（5.34 mΩ cm2）、热导率（10.58 W (m K)-1）和腐蚀行为（0.0701 A cm-2），从而保证了 PEMFC 的运行。这项工作从树脂的润湿性调节方面为改进 CBP 提供了新的见解，是一种易于操作的方法，在实际 CBP 制备中具有巨大的应用潜力。

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引用次数: 0

Temperature-dependent evolution of synthetic coal-derived graphite fillers and their reinforcement in styrene butadiene rubber composites 合成煤石墨填料及其在丁苯橡胶复合材料中的补强作用随温度的变化

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2024-09-23 DOI: 10.1016/j.compscitech.2024.110883

Hao Zhang , Xiaoyu Ding , Yongjie Yang , Qinfu Liu , Leibo Ji , Kuo Li , Junmin Sun , Zhiming Sun , Qianyi Ma , Ying Wu , Xinyang Liu , Chul B. Park , Naisheng Jiang

This study investigated the structural evolution of synthetic coal-derived graphite (SCG), produced from anthracite through high-temperature treatments ranging from 1000 to 2900 °C, and its reinforcement potential in styrene butadiene rubber (SBR) composites. Upon heating the anthracite to 2000 °C, We observed a gradual structural transformation from an amorphous carbon structure with mixed sp²-sp³ bonding to an ordered sp²-bonded nano-sized graphitic structure. This transformation was accompanied by the evaporation of heteroatom functional groups, an increase in high surface energy site as well as micropore and void structures, and enhanced hydrophobic surface property. Beyond 2000 °C, a flake-like graphite with a larger particle size (average lateral size >10 μm) was gradually formed through lateral and vertical crystalline growth mechanisms. The reinforcing potential of SCG fillers was revealed by incorporating them into SBR and evaluating the properties of the resulting composites. It was found that the tensile strength and 300 % tensile modulus initially enhanced with SCG fillers treated up to 2000 °C, but decreased for fillers treated at 2300 and 2900 °C. On the other hand, storage modulus, tear resistance, and gas permeability consistently improved with fillers treated at higher temperatures. These findings highlight the relationship between the temperature-induced structural evolution of SCG fillers and their reinforcement performance in SBR composites, offering valuable insights for industrial rubber applications, particularly enhancing the performance and sustainability of automotive tire.

本研究调查了无烟煤经 1000 至 2900 °C 高温处理后产生的合成煤石墨（SCG）的结构演变及其在丁苯橡胶（SBR）复合材料中的增强潜力。将无烟煤加热到 2000 °C后，我们观察到其结构从混合 sp2-sp3 键的无定形碳结构逐渐转变为有序 sp2 键的纳米级石墨结构。伴随这种转变的是杂原子官能团的蒸发、高表面能位点以及微孔和空隙结构的增加和疏水表面特性的增强。超过 2000 °C 后，通过横向和纵向结晶生长机制，逐渐形成了粒径更大（平均横向尺寸为 10 μm）的片状石墨。通过在丁苯橡胶中加入 SCG 填料并对所得复合材料的性能进行评估，揭示了 SCG 填料的增强潜力。研究发现，SCG 填料在 2000 ℃ 以下处理时，拉伸强度和 300 % 拉伸模量最初有所提高，但在 2300 ℃ 和 2900 ℃ 处理时，拉伸强度和 300 % 拉伸模量有所降低。另一方面，在较高温度下处理的填料的储存模量、抗撕裂性和气体渗透性持续提高。这些发现强调了温度诱导的 SCG 填料结构演变与其在 SBR 复合材料中的补强性能之间的关系，为工业橡胶应用，尤其是提高汽车轮胎的性能和可持续性提供了宝贵的见解。

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引用次数: 0

A multifunctional leather composite with good antibacterial and hygrothermal management capabilities 具有良好抗菌和湿热管理能力的多功能皮革复合材料

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2024-09-21 DOI: 10.1016/j.compscitech.2024.110875

Ping Wang , Caiqing Mo , Yanqing Liu , Ying Jiang , Zhicheng Zhang , Huajun Wu , Guiyu Luo , Yu She , En-Tang Kang , Kai Zhang , Liqun Xu

If not removed in a timely manner, the large amount of sweat produced by overheated human skin can cause thermal discomfort and health problems. Development of fabrics with cooling and dehumidifying capabilities is advantageous to improving the quality of human life. In this work, a natural leather-based Zn-monoethanolamine@lignin (Zn-MEA@lignin-leather) composite fabric with personal hygrothermal management properties was fabricated by infiltrating the permeable 3D network microstructure of the natural leather collagen fiber bundles with adhering moisture-absorbent hydrogel containing photothermal lignin. Due to the efficiency of the composite hydrogel in trapping water molecules, the fabric can promote evaporation of sweat from overheated skin surfaces. Compared to the conventional textiles, the composite leather fabric can reduce the humidity of simulated skin surface by about 40 % and accelerate the evaporation of sweat from the skin surface to promote reduction in temperature of the overheated body. Thanks to the good photothermal conversion efficiency of lignin, the hydrated composite fabric exhibits a favorable evaporation regeneration rate (0.498 kg m⁻² h⁻¹). In addition, the presence of zinc ions in the coordination complex imparts good antimicrobial efficiency to the composite fabric, with inactivation rates approaching 99.99 % for both Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). Thus, the composite leather fabric holds great promise to personal hygrothermal management and healthcare.

人体皮肤过热产生的大量汗液如不及时排出，会引起热不适和健康问题。开发具有降温和除湿功能的织物有利于提高人类的生活质量。在这项研究中，通过在天然皮革胶原纤维束的渗透性三维网络微结构中渗入含有光热木质素的吸湿水凝胶，制备了一种具有个人湿热管理特性的天然皮革基 Zn- 单乙醇胺@木质素（Zn-MEA@木质素-皮革）复合织物。由于复合水凝胶能有效吸附水分子，因此织物能促进过热皮肤表面的汗液蒸发。与传统纺织品相比，复合皮革织物可将模拟皮肤表面的湿度降低约 40%，并加速皮肤表面汗液的蒸发，从而促进过热体温的降低。由于木质素具有良好的光热转换效率，水合复合织物显示出良好的蒸发再生率（0.498 kg m-2 h-1）。此外，配位复合物中锌离子的存在为复合织物带来了良好的抗菌效率，对金黄色葡萄球菌（S. aureus）和大肠杆菌（E. coli）的灭活率接近 99.99%。因此，复合皮革织物在个人温湿度管理和医疗保健方面大有可为。

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引用次数: 0

Self-assembled nest-like BN skeletons enable polymer composites with high thermal management capacity 自组装的巢状 BN 骨架使聚合物复合材料具有高热能管理能力

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2024-09-21 DOI: 10.1016/j.compscitech.2024.110869

Jiangang Zhou, Congzhen Xie, Huasong Xu, Bin Gou, An Zhong, Daoming Zhang, Hangchuan Cai, Chunhui Bi, Licheng Li, Rui Wang

The lagging development of thermally conductive but electrically insulating materials has become a bottleneck problem for the next generation of advanced high-power density electronic devices. Although second-phase reinforced composites are promising materials for addressing thermal management issues, the inherent mechanism of severe phonon scattering at the interphase results in actual thermal conductivity enhancement efficiency far below expectations. Here, we report a high-performance polymer composite with a nest-like interconnected boron nitride skeleton. This nest-like interconnected BN skeleton without mechanical contact can provide high-efficiency and long-distance phonon transport channel, realizing high thermal conductivity of 1.827 W m⁻¹ K⁻¹ in polymer composite with ultra-low content (4.7 vol%). Meanwhile, the EP/nest-like BS composites possess ideal electrical properties and dimensional stability. In the actual heat dissipation process of LED chips, the optimal composite material as the thermal interface material can display a temperature drop of more than 34.8 % compared to neat epoxy, which proves the broad application prospects of this strategy in advanced electronic devices.

导热但绝缘材料的发展滞后已成为下一代先进高功率密度电子设备的瓶颈问题。尽管第二相增强复合材料是解决热管理问题的有前途的材料，但由于相间存在严重的声子散射，其固有机制导致实际热导增强效率远低于预期。在此，我们报告了一种具有巢状互连氮化硼骨架的高性能聚合物复合材料。这种无机械接触的巢状互连氮化硼骨架可提供高效的长距离声子传输通道，在超低含量（4.7 vol%）的聚合物复合材料中实现了 1.827 W m-1 K-1 的高热导率。同时，EP/nest-like BS 复合材料具有理想的电气性能和尺寸稳定性。在 LED 芯片的实际散热过程中，作为热界面材料的最佳复合材料与纯环氧树脂相比，温度下降超过 34.8%，这证明了该策略在先进电子设备中的广阔应用前景。

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引用次数: 0