Composites Communications最新文献_第2页

Mussel-inspired wet-spun conductive fibers for stretchable electronics 用于可拉伸电子器件的贻贝启发湿纺导电纤维

IF 6.5 2区材料科学

Composites Communications Pub Date : 2024-11-20 DOI: 10.1016/j.coco.2024.102171

Renqiao Wang , Liping Xie , Zelin Zhang , Hongbin Sun , Yiming Xiao

{"title":"Mussel-inspired wet-spun conductive fibers for stretchable electronics","authors":"Renqiao Wang , Liping Xie , Zelin Zhang , Hongbin Sun , Yiming Xiao","doi":"10.1016/j.coco.2024.102171","DOIUrl":"10.1016/j.coco.2024.102171","url":null,"abstract":"<div><div>Flexible conductive fibers have gained significant attention for their exciting potential in stretchable electronics, attributed to their thread-like structure, lightweight, and flexibility. However, it is still challenging to prepare adjustable conductive fibers that boast outstanding electronic characteristics using an eco-friendly and simple method. Inspired by mussel byssus threads, a new strategy for the preparation of conductive fiber was proposed by combining the wet-spun polyurethane (PU) fiber and liquid metal (LM) using tannic acid (TA) as a binder. The inherent adhesive property of TA with rich catechol/gallocatechol groups enables it as a binder to enhance the affinity of PU fiber to LM. The fiber (LM@TA-PU fiber, LTP) composed of TA-modified PU as a core and an EGaIn conductive layer exhibited a high electrical conductivity (3.522 × 10<sup>5</sup> S m<sup>−1</sup>) and a large tensile range (0–640 %). The fiber displayed a fast response time (63 ms), notable durability (over 5000 cycles), and very tiny detection of strain (0.1 %). Moreover, the LTP fibers were employed as flexible sensors and electrodes for the acquisition of signals. Based on the LTP fiber, wireless Bluetooth, and programming technology, intelligent applications displayed in a cell phone were implemented for gesture recognition and music playback control. This work offers a novel method to prepare flexible conductive fibers, opening up new possibilities for applications in motion monitoring, gesture recognition, and the Internet of Things.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"53 ","pages":"Article 102171"},"PeriodicalIF":6.5,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142705883","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

Reactive carbon dots/polysiloxane composites cross-linked silicone resin adhesives for stable white LED constructing 用于构建稳定白光 LED 的交联硅树脂粘合剂--活性碳点/聚硅氧烷复合材料

IF 6.5 2区材料科学

Composites Communications Pub Date : 2024-11-20 DOI: 10.1016/j.coco.2024.102172

Liya Zhang , Wei Wang , Peng Jin, Zhengguang Sun, Yuan Zhan, Bingbing Jiang

{"title":"Reactive carbon dots/polysiloxane composites cross-linked silicone resin adhesives for stable white LED constructing","authors":"Liya Zhang , Wei Wang , Peng Jin, Zhengguang Sun, Yuan Zhan, Bingbing Jiang","doi":"10.1016/j.coco.2024.102172","DOIUrl":"10.1016/j.coco.2024.102172","url":null,"abstract":"<div><div>Current high-performance commercial white LEDs typically rely on Ce:Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub> (Ce:YAG) phosphors and their dispersed encapsulating material. However, Ce:YAG often has large particle sizes and does not react with the encapsulating material, causing stratification and sedimentation. To address this problem, a novel reactive carbon dots/polysiloxane (R-CDs/PS) composite was synthesized through a one-step solvothermal process involving citric acid, urea, 3-aminopropyltriethoxysilane (APTES), and vinyltrimethoxysilane (VTMS). The composite exhibits yellow emission at 528 nm under UV excitation and has a particle size of approximately 150 nm. To improve integration, vinyl adhesive (vinyl AD) and vinyl MDQ resin were designed and synthesized to enhance adhesion and mechanical strength. When dispersed in silicone resin adhesives (SRAs), R-CDs/PS composite forms a stable color conversion layer, avoiding stratification due to its nanoscale size and chemical cross-linking with SRAs. White LEDs can be easily produced by casting R-CDs/PS composites and SRAs onto LED chips, followed by high-temperature curing. These LEDs exhibit desirable optical properties, including CIE coordinates of (0.33, 0.34), a CRI of 82.2, and a CCT of 5355 K, making them suitable for indoor lighting. This study not only introduces a practical approach for fabricating fluorescent and encapsulating materials but also offers a valuable strategy for improving the stability of white LEDs.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"53 ","pages":"Article 102172"},"PeriodicalIF":6.5,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142705783","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

Large-field detection of Metal/CFRP hybrid composites based on air-coupled laser ultrasound 基于空气耦合激光超声的金属/CFRP 混合复合材料大场探测

IF 6.5 2区材料科学

Composites Communications Pub Date : 2024-11-20 DOI: 10.1016/j.coco.2024.102174

Bainian Long , Zhongwen Cheng , Weisheng Liao , Junwei Wu , Lvming Zeng , Xuanrong Ji

{"title":"Large-field detection of Metal/CFRP hybrid composites based on air-coupled laser ultrasound","authors":"Bainian Long , Zhongwen Cheng , Weisheng Liao , Junwei Wu , Lvming Zeng , Xuanrong Ji","doi":"10.1016/j.coco.2024.102174","DOIUrl":"10.1016/j.coco.2024.102174","url":null,"abstract":"<div><div>Metal/carbon fiber reinforced polymer (CFRP) hybrid composites are widely used in the aeronautical and aerospace industry due to their excellent mechanical properties. However, traditional nondestructive testing methods are difficult to achieve fast, non-contact, large-field, high resolution, and high contrast detection at the same time, due to the large differences in thickness, density, acoustic impedance, and thermal diffusion between metal and fiber layers. Here, an air-coupled laser ultrasound (ACLU) method was presented for large-field detection of internal defects on the non-homogeneous metal/CFRP interface. Simulation analysis was conducted to analyze the propagation characteristics of laser ultrasound in Al/CFRP hybrid composites without defect and with defect. Test results for ACLU system display that the maximum imaging field of view is 300 mm × 75 mm at the frame rate of 1.5 s/frame. Under a 0.3 mm metal layer, the detecting resolution of the system can still reach up to 200 μm. The system was applied to detect three types of crack and disbond defects of metal/CFRP hybrid composites, and making a side-by-side comparison with phased array ultrasonic testing (PAUT) and radiographic testing (RT). The C-scan results show that the constructed system obtains a high signal-to-noise ratio (SNR) of 23 dB, which improves 4 times and 20 times compared with PAUT and RT, respectively. It indicates that the developed ACLU system hold a great prospect in non-contact large-field inspection of metal/CFRP hybrid composites.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"53 ","pages":"Article 102174"},"PeriodicalIF":6.5,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142705788","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

Efficient self-welding of highly cross-linked thermoset composites assisted by universally multiple solvents 通用多元溶剂辅助高交联热固性复合材料的高效自焊接

IF 6.5 2区材料科学

Composites Communications Pub Date : 2024-11-19 DOI: 10.1016/j.coco.2024.102163

Le An, Xiuzhao Li, Chenyu Jin

{"title":"Efficient self-welding of highly cross-linked thermoset composites assisted by universally multiple solvents","authors":"Le An, Xiuzhao Li, Chenyu Jin","doi":"10.1016/j.coco.2024.102163","DOIUrl":"10.1016/j.coco.2024.102163","url":null,"abstract":"<div><div>Welding through bond exchange reactions (BERs) has attracted widespread attention in highly cross-linked thermoset composites. However, thermosets with permanently cross-linked networks cannot undergo BERs, and therefore cannot be self-welded intrinsically. In this work, multiple solvents are proposed to efficiently assist in self-welding for thermoset composites. This innovative approach involves immersing the epoxy composites in a catalyst solution, where the solvent delivers the catalyst into the epoxy matrices. Upon contact, BERs occurs between the separated polymer networks, leading to the formation of dynamic covalent bonds across the contacted interface. To examine the universality and feasibility of such a welding method, we arbitrarily choose eight of the most commonly used solvents. A high shear strength of 31.5 MPa is obtained in the single lap-shear test, which is 5 times larger than direct joining. Moreover, the maximum shear strength of self-welding is 1.4 times larger than extrinsic welding. This is because BERs in extrinsic welding extend the polymer chains and thus make them more ﬂexible, while it does not occur in the self-welding method. Solvent with lower polarity, higher molecular weight and lower boiling point is beneficial to the self-welding. This work broadens the applicable solvent for welding of highly cross-linked thermoset composites.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"53 ","pages":"Article 102163"},"PeriodicalIF":6.5,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142705786","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

Cluster analysis of acoustic emission signals for bending damage mechanism of flax fiber reinforced composites under hydrothermal aging 水热老化条件下亚麻纤维增强复合材料弯曲损伤机制的声发射信号聚类分析

IF 6.5 2区材料科学

Composites Communications Pub Date : 2024-11-19 DOI: 10.1016/j.coco.2024.102165

Jieyu Chen , Lulu Lei , Chao Ji , Sixian Yang , Zefei Cheng , Jinhong Fan , Tao Yu

{"title":"Cluster analysis of acoustic emission signals for bending damage mechanism of flax fiber reinforced composites under hydrothermal aging","authors":"Jieyu Chen , Lulu Lei , Chao Ji , Sixian Yang , Zefei Cheng , Jinhong Fan , Tao Yu","doi":"10.1016/j.coco.2024.102165","DOIUrl":"10.1016/j.coco.2024.102165","url":null,"abstract":"<div><div>Despite the eco-friendly and lightweight features, natural fiber reinforced composites (NFRCs) are more susceptible under hydrothermal conditions than artificial synthesis fibers reinforced composites. Cluster analysis on damage evolution of hydrothermal aged NFRCs by using acoustic emission techniques and machine learning also remains scare. To figure out these challenges, unidirectional flax fiber reinforced composites (FFRCs) were prepared and submerge into distilled water at three different temperatures to systematically study the influence and damage mechanism under hydrothermal aging by acoustic emission (AE). After hydrothermal aging for 60 days, AE signals revealed that the FFRCs were more likely to cause defects in the early loading stage at the higher temperature. Cluster analysis showed an increase in the proportion of delamination during the process of failure. The proportion of fiber breakage AE signals with higher PF also increased. Microscope view proved the bending damage behavior of FFRCs after hydrothermal aging.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"53 ","pages":"Article 102165"},"PeriodicalIF":6.5,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142705784","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

Flexible self-adhesive high-performance electromagnetic shielding film 柔性自粘高性能电磁屏蔽膜

IF 6.5 2区材料科学

Composites Communications Pub Date : 2024-11-19 DOI: 10.1016/j.coco.2024.102170

Kaichao Pan , Yunan Shi , Jiang Du , Jun Qiu

引用次数: 0

Effect of powder mixing on the mechanical strength of polyamide 6-AZ61 magnesium composites prepared by compression molding 粉末混合对压缩成型法制备的聚酰胺 6-AZ61 镁复合材料机械强度的影响

IF 6.5 2区材料科学

Composites Communications Pub Date : 2024-11-17 DOI: 10.1016/j.coco.2024.102169

Song-Jeng Huang , Yopi Yusuf Tanoto , Chuan Li

{"title":"Effect of powder mixing on the mechanical strength of polyamide 6-AZ61 magnesium composites prepared by compression molding","authors":"Song-Jeng Huang , Yopi Yusuf Tanoto , Chuan Li","doi":"10.1016/j.coco.2024.102169","DOIUrl":"10.1016/j.coco.2024.102169","url":null,"abstract":"<div><div>A composite material of polyamide 6 and AZ61 magnesium alloy was produced by hot press molding. Both matrix and reinforcement powders were thoroughly mixed by ball milling and then hot pressed to forge a bulk material. Four process parameters of the mixing process including milling time, milling speed, ball-to-powder weight ratio, and the AZ61 wt percentage at various levels were investigated for their influences on the mechanical strength of the composites. Material characterization includes XRD, scanning electron microscopy, uniaxial tensile test, and Vickers hardness. An experimental design using Taguchi (L9 (3,4)) and an analysis of variance indicate that the AZ61 wt percentage is the most influential factor in the ultimate strength of the PA6-AZ61 composite. Adding 5 wt% reinforcement powders to PA6 and milled at 300 rpm for 30 min can increase the average ultimate tensile strength of composites to 63.83 MPa with a maximum strain of 7.71 %, and Vickers hardness of 21.97 HV. As compared to those in the pure PA6 matrix (58.83 MPa 2.29 %, and 13.01 HV), this enhancement in ductility is achieved by the well-dispersed AZ61 particles in the PA6 matrix.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"53 ","pages":"Article 102169"},"PeriodicalIF":6.5,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142705790","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

Nano-layered double hydroxides as efficient endothermic, strengthening, and flame-retardant agents for fly ash/polyurethane composite materials 纳米层状双氢氧化物作为粉煤灰/聚氨酯复合材料的高效吸热剂、强化剂和阻燃剂

IF 6.5 2区材料科学

Composites Communications Pub Date : 2024-11-16 DOI: 10.1016/j.coco.2024.102168

Sitong Zhang , Rui Feng , Jing Zhang , Wenwen Yu , Lan Jia , Fengbo Zhu , Qiang Zheng

{"title":"Nano-layered double hydroxides as efficient endothermic, strengthening, and flame-retardant agents for fly ash/polyurethane composite materials","authors":"Sitong Zhang , Rui Feng , Jing Zhang , Wenwen Yu , Lan Jia , Fengbo Zhu , Qiang Zheng","doi":"10.1016/j.coco.2024.102168","DOIUrl":"10.1016/j.coco.2024.102168","url":null,"abstract":"<div><div>Polyurethane (PU) grouting materials in coal mining must possess essential mechanical properties and exhibit low heat release and high flame retardancy to enhance the safety and efficiency of coal mining. In this study, fly ash (FA) and nano-layered double hydroxides (LDH) were utilized as fillers to prepare a series of PU/FA/LDH composite grouting materials. Results showed that incorporating 2.5 % LDH reduced the maximum reaction temperature by 26.7 °C and decreased heat release from 177.45 J/g to 108.37 J/g compared to PU grouting material. These reductions were attributed to the uniform dispersion of LDH, which enabled the endothermic removal of plentiful adsorbed water during the curing process. However, exceeding 2.5 % LDH caused agglomeration, encapsulating the water and increasing the maximum reaction temperature. The effective fraction of closed cells in the PU/FA/LDH composite grouting materials was tailored by increasing the content of LDH, leading to enhanced compression strength. Moreover, cone calorimetry revealed that LDH was more effective in reducing the heat release during the combustion process of PU grouting materials, while FA was more effective in reducing smoke production. This synergistically enhanced the flame retardancy of the PU grouting materials. This work provides an effective way to produce high-strength, flame-retardant grouting materials at lowered reaction temperatures.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"53 ","pages":"Article 102168"},"PeriodicalIF":6.5,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142705880","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

Super-elastic and multifunctional core-sheath EGaIn fibers for wearable motion detection and visual electrophysiologic monitoring 用于可穿戴运动检测和视觉电生理监测的超弹性多功能芯鞘 EGaIn 纤维

IF 6.5 2区材料科学

Composites Communications Pub Date : 2024-11-16 DOI: 10.1016/j.coco.2024.102167

Ming Weng , Jihong Wang , Yunpeng Huang

{"title":"Super-elastic and multifunctional core-sheath EGaIn fibers for wearable motion detection and visual electrophysiologic monitoring","authors":"Ming Weng , Jihong Wang , Yunpeng Huang","doi":"10.1016/j.coco.2024.102167","DOIUrl":"10.1016/j.coco.2024.102167","url":null,"abstract":"<div><div>Fiber-based wearable electronics, distinguished by their remarkable flexibility and robust performance, have emerged as a focal point in healthcare and soft robotics. While significant strides have been made in advancing fiber-based wearable electronics, pursuing multifunctional integration, particularly in areas such as personal health monitoring continues to present significant challenges. In this work, we report the successful fabrication of ultra-elastic and multifunctional core-sheath EGaIn microfibers tailored for wearable motion detection and visual electrophysiologic monitoring. These highly conductive fibers are characterized by an intriguing core-sheath structure, achieved through the uniform coating of EGaIn liquid metal on wet-spun elastomeric microfibers, which are priorly magnetron sputtered with gold nanoparticles (Au NPs) for fast alloying with EGaIn. Prepared core-sheath EGaIn microfibers possess numerous micro-wrinkles on the surface via a simple pre-stretching treatment, thus demonstrating an exceptional sensitivity (GF = 108.3), a fast response time of 82 ms, and remarkable stability. Their superior electromechanical stability and sensitivity under various strain conditions enable reliable and real-time detection of human motion signals, electrooculography (EOG) signals, and visual evoked potentials (VEP). This research offers a novel approach to the multifunctional integration of high-performance fiber-based electronics.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"52 ","pages":"Article 102167"},"PeriodicalIF":6.5,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706674","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

Achieving enhanced thermal conductivity and low dielectric constants using double-oriented fluorinated graphene skeleton in silicone gel composites 在硅凝胶复合材料中使用双向氟化石墨烯骨架实现更高的导热性和更低的介电常数

IF 6.5 2区材料科学

Composites Communications Pub Date : 2024-11-15 DOI: 10.1016/j.coco.2024.102162

Potao Sun, Haoyue Yang, Wenxia Sima, Tao Yuan, Ming Yang, Xinyu Tang, Wenlong Pang, Shuofei Huang

{"title":"Achieving enhanced thermal conductivity and low dielectric constants using double-oriented fluorinated graphene skeleton in silicone gel composites","authors":"Potao Sun, Haoyue Yang, Wenxia Sima, Tao Yuan, Ming Yang, Xinyu Tang, Wenlong Pang, Shuofei Huang","doi":"10.1016/j.coco.2024.102162","DOIUrl":"10.1016/j.coco.2024.102162","url":null,"abstract":"<div><div>The dielectric properties and thermal conductivity of composites are often contradictory. To improve the thermal conductivity, the filler content needs to be increased, which often contributes to the high dielectric constant of the material. Inspired by the layout of community buildings, in this study, silicone gel/double-oriented fluorinated graphene skeleton composites were prepared, which solved the difficulty in assembling fluorinated graphene in situ into a three-dimensional continuous network structure. This greatly improved the thermal conductivity and reduced the dielectric constant of the silicone gel while maintaining a low filler content and the insulating properties. In addition, based on the reconstruction of a real three-dimensional body, the mechanism by which the skeleton improved the material performance was analyzed using finite element simulation. The vertical and horizontal thermal conductivity of the silicone gel/double-oriented fluorinated graphene skeleton composites reached 3.34 W/(m·K) and 2.65 W/(m·K), respectively, and the dielectric constant dropped to 80 % of that of pure silicone gel. This provided a new way to synergistically improve the dielectric properties and thermal conductivity of insulating materials, and has great application potential as a thermal interface material in next-generation electronic devices.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"53 ","pages":"Article 102162"},"PeriodicalIF":6.5,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142705787","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