Composites Communications最新文献_第7页

A smart epoxy coating based on Zn-imidazole metal-organic framework/graphene oxide nanocomposite for corrosion protection 基于锌-咪唑金属-有机骨架/氧化石墨烯纳米复合材料的智能环氧防腐涂层

IF 7.7 2区材料科学

Composites Communications Pub Date : 2025-08-11 DOI: 10.1016/j.coco.2025.102556

Danial Hayati, Shahram Ghasemi, Moslem Mansour Lakouraj, Farimah Mousavi

{"title":"A smart epoxy coating based on Zn-imidazole metal-organic framework/graphene oxide nanocomposite for corrosion protection","authors":"Danial Hayati, Shahram Ghasemi, Moslem Mansour Lakouraj, Farimah Mousavi","doi":"10.1016/j.coco.2025.102556","DOIUrl":"10.1016/j.coco.2025.102556","url":null,"abstract":"<div><div>Developing smart coatings for metal substrates is increasingly significant for advancing corrosion protection technologies. This study focuses on reinforcing epoxy polymer coating using a nanocomposite consisting of graphene oxide (GO) nanosheets and polyhedron zeolitic imidazolate framework-8 (ZIF-8) impregnated with benzotriazole (BTA) inhibitor. Morphological and structural analyses were conducted using transmission electron microscopy (TEM) and field-emission scanning electron microscopy (FE-SEM) coupled with energy dispersive X-ray spectroscopy (EDS). X-ray diffraction (XRD) patterns have demonstrated the crystalline structure of the samples and the reasonable synthesis route for the GO/ZIF-8/BTA nanocomposite. Fourier-transform infrared (FTIR), Raman, and X-ray photoelectron (XPS) spectroscopies have identified various oxygen- and nitrogen-containing functional groups in the nanocomposite as possible bonding sites to metal surfaces and enhance the corrosion protection of the film. The claim was further confirmed using density functional theory (DFT). The N<sub>2</sub> adsorption/desorption results declared a superior specific surface area of 1761 m<sup>2</sup> g<sup>−1</sup> for the ZIF-8 sample, providing a high amount of accessible micropores to store BTA molecules. Diverse samples of epoxy (EP) films were loaded with under-study materials and coated on steel (ST) blades. They were subjected to a series of experiments, including FE-SEM, EDS, elemental mapping, contact angle measurement, salt spray testing, Tafel polarization, and electrochemical impedance spectroscopy (EIS). The optimized ST/GO/ZIF-8/BTA/EP sample exhibited an open-circuit potential of −280 mV, a corrosion current density of 0.02 μA cm<sup>−2</sup>, and a charge-transfer resistance of 54.50 kΩ cm<sup>2</sup>, indicating 99 % improvement over ST/EP. The study revealed reliable long-term anticorrosion performance of GO/ZIF-8/BTA/EP film to protect metal surfaces.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"59 ","pages":"Article 102556"},"PeriodicalIF":7.7,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144886311","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

Universally autonomous self-healing triboelectric nanogenerators based on fully bio-Polyurethane/AgNWs composite electrodes 基于全生物聚氨酯/AgNWs复合电极的普遍自主自修复摩擦电纳米发电机

IF 7.7 2区材料科学

Composites Communications Pub Date : 2025-08-11 DOI: 10.1016/j.coco.2025.102558

Linman Zhang , Hong Wang , Weijun Yang , Pengwu Xu , Deyu Niu , Chaoyu Chen , Pibo Ma , Piming Ma

{"title":"Universally autonomous self-healing triboelectric nanogenerators based on fully bio-Polyurethane/AgNWs composite electrodes","authors":"Linman Zhang , Hong Wang , Weijun Yang , Pengwu Xu , Deyu Niu , Chaoyu Chen , Pibo Ma , Piming Ma","doi":"10.1016/j.coco.2025.102558","DOIUrl":"10.1016/j.coco.2025.102558","url":null,"abstract":"<div><div>To overcome the petroleum dependence, non-degradability, and fatigue damage of traditional polyurethanes, we designed and synthesized a fully bio-based polyurethane elastomer (WBPUxPy). This material incorporates dynamic van der Waals interactions, hydrogen-bonded cross-links, and degradable polylactic acid (PLA) segments. Flexible chain segments enable molecular mobility at low temperatures (glass transition temperature, <em>T</em><sub>g</sub> = −39 °C), while the dynamic network enables efficient self-healing across a wide temperature spectrum (from −10 °C to 80 °C). Furthermore, the PLA segments impart alkaline degradability, enabling environmentally benign recycling of electronic components. A low-temperature self-healing triboelectric nanogenerator (LZ-TENG) was fabricated using WBPUxPy as the tribo-active layer and a WBPU<sub>6</sub>P<sub>1</sub>/silver nanowire (AgNWs) composite as the conductive electrode layer. This composite device retained 95 % of its output performance after self-healing at −10 °C. Practical implementation demonstrated this composite TENG's stable power generation capability under extreme conditions when integrated into a self-power supply system. This work provides an innovative bio-based elastomer and its derived composite functional layers/devices for flexible electronics and sustainable energy applications.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"59 ","pages":"Article 102558"},"PeriodicalIF":7.7,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144842494","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

Interface coupling strategy for significantly improving flame-retardant efficiency of polyamide 6/aluminum diethylphosphinate composites 显著提高聚酰胺6/二乙基膦酸铝复合材料阻燃性能的界面耦合策略

IF 7.7 2区材料科学

Composites Communications Pub Date : 2025-08-09 DOI: 10.1016/j.coco.2025.102543

Hongfan Liu, Wen Long, Qisong Li, Jie Li, Jiuxia Su, Yang Leng, Miaojun Xu, Xiaoli Li, Bin Li

{"title":"Interface coupling strategy for significantly improving flame-retardant efficiency of polyamide 6/aluminum diethylphosphinate composites","authors":"Hongfan Liu, Wen Long, Qisong Li, Jie Li, Jiuxia Su, Yang Leng, Miaojun Xu, Xiaoli Li, Bin Li","doi":"10.1016/j.coco.2025.102543","DOIUrl":"10.1016/j.coco.2025.102543","url":null,"abstract":"<div><div>Commercial P-containing flame-retardant aluminum diethylphosphinate (ADP) demonstrates limited effectiveness when applied to flame-retardant polyamide 6 (PA6), as combustion still generates substantial dense smoke and combustible melt drips at additive levels below 13 %. This study developed K<sub>5</sub>ADP through modification of ADP with silane coupling agent KH560 (3-glycidoxypropyltrimethoxysilane) at 5 wt % loading, which significantly enhanced the efficiency of ADP. The obtained PA6/8.37 %ADP/0.63 %K<sub>5</sub>ADP composite, with 9 % total addition of ADP/K<sub>5</sub>ADP (93:7), achieved UL-94 V-0 classification and a 30.7 % LOI. Compared with pure PA6, the peak values of heat (HRR), total heat release (THR), and carbon dioxide production rate (CO<sub>2</sub>P) decreased by 52.42 %, 17.37 %, 57.60 %, separately. The results of TGA, SEM-EDS, XRD, XPS and Raman collectively reveal the enhanced condensed-phase flame retarded mechanism of PA6/8.37 %ADP/0.63 %K<sub>5</sub>ADP composite due to cross-linked charring via interface coupling, while also causing a slightly decrease of the total amount of phosphorus-containing compounds in the gas phase than that of the PA6/9 %ADP composite, shown in TG-IR. The interface coupling simultaneously improves mechanical properties and water resistance, while effectively addressing fire and heat/smoke hazards of PA6.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"59 ","pages":"Article 102543"},"PeriodicalIF":7.7,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144842493","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

A novel equivalent laminated model for thermoplastic fabric prepreg and its application in fast hot stamping simulation 一种新型热塑性织物预浸料等效层合模型及其在快速热冲压仿真中的应用

IF 7.7 2区材料科学

Composites Communications Pub Date : 2025-08-08 DOI: 10.1016/j.coco.2025.102555

Yongfeng Li , Yi Fan , Hui Zhang

{"title":"A novel equivalent laminated model for thermoplastic fabric prepreg and its application in fast hot stamping simulation","authors":"Yongfeng Li , Yi Fan , Hui Zhang","doi":"10.1016/j.coco.2025.102555","DOIUrl":"10.1016/j.coco.2025.102555","url":null,"abstract":"<div><div>Fast hot stamping of carbon fiber-reinforced thermoplastic composite(CFRTP) constitutes a vital process for achieving cost-effective and efficient forming. However, the complex thermomechanical deformation experienced by CFRTP during the hot stamping process presents considerable challenges in controlling the forming quality, which in turn limits the development and application of CFRTP. In this study, we comprehensively investigate the temperature-dependent deformation behavior of a typical fabric-reinforced thermoplastic prepreg. We propose an innovative laminated modeling method tailored for the prepreg that effectively takes into account the mutual influence of fabric and matrix deformation through the interface layer. Utilizing reverse optimization techniques, we successfully identify the parameters of the proposed model. Finally, we apply our model to the hot stamping simulation of a typical hemispherical part, validating its reliability. The results clearly indicate that our model achieves superior prediction accuracy compared to traditional models across a wide temperature range, maintaining a shear angle prediction error of less than 5 %.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"59 ","pages":"Article 102555"},"PeriodicalIF":7.7,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144842492","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

Electrical monitoring of structural health of multiscale hierarchical composites using fibers modified by graphenic sheets or carbon nanotubes 石墨烯片或碳纳米管改性纤维多尺度分层复合材料结构健康的电监测

IF 7.7 2区材料科学

Composites Communications Pub Date : 2025-08-06 DOI: 10.1016/j.coco.2025.102553

G. Uribe-Riestra , J. Heredia-Lozano , M. Rivero-Ayala , J. Cauich-Cupul , F. Gamboa , F. Léonard , S. Diaham , Z. Valdez-Nava , A. Castillo-Atoche , F. Avilés

{"title":"Electrical monitoring of structural health of multiscale hierarchical composites using fibers modified by graphenic sheets or carbon nanotubes","authors":"G. Uribe-Riestra , J. Heredia-Lozano , M. Rivero-Ayala , J. Cauich-Cupul , F. Gamboa , F. Léonard , S. Diaham , Z. Valdez-Nava , A. Castillo-Atoche , F. Avilés","doi":"10.1016/j.coco.2025.102553","DOIUrl":"10.1016/j.coco.2025.102553","url":null,"abstract":"<div><div>Fiber reinforced composite structures are susceptible to complex damage, and current nondestructive evaluation methods are challenging to implement for health monitoring. To address these problems, multilayer graphenic sheets and multiwall carbon nanotubes were deposited over the surface of glass fiber weaves and infused with a vinyl ester resin to fabricate electrically conductive laminated polymer composites capable of self-monitoring structural damage. An array of 42 electrodes was placed at the top layer of the glass/vinyl ester laminated composite beams, which were subjected to monotonic and cyclic four-point bending tests. An artificial debond was induced at the center of selected bending specimens to deliberately control the expected critical damage location. In situ measurements of electrical resistance revealed presence of damage around the debond zone. For specimens without debond, damage was mainly located near the supports and load introduction elements. The regions with the largest electrical resistance changes also experienced the highest strain levels according to the strain fields obtained by digital image correlation, and showed remarkable correlation with X-ray tomography regarding damage location. As further observed by post-mortem X-ray tomography, major damage in the bending specimens occurred by fiber buckling in the compression surface and delamination. The graphenic sheet-modified laminated composites exhibited slightly higher electrical sensitivity than those modified with carbon nanotubes. However, the carbon nanotube-modified fibers achieved comparable electrical sensitivity using only one-fourth the weight concentration of graphenic sheets.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"58 ","pages":"Article 102553"},"PeriodicalIF":7.7,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144809518","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

Unveiling the essence of fracture energy in composite elastomers with micro-sizes fillers 揭示了微尺寸填充复合弹性体断裂能的本质

IF 7.7 2区材料科学

Composites Communications Pub Date : 2025-08-06 DOI: 10.1016/j.coco.2025.102554

Gaohong Lv , Yunsong Pang , Linfeng Cai , Siyuan Cheng , Shujun Cai , Linlin Ren , Rong Sun , Xiaoliang Zeng

{"title":"Unveiling the essence of fracture energy in composite elastomers with micro-sizes fillers","authors":"Gaohong Lv , Yunsong Pang , Linfeng Cai , Siyuan Cheng , Shujun Cai , Linlin Ren , Rong Sun , Xiaoliang Zeng","doi":"10.1016/j.coco.2025.102554","DOIUrl":"10.1016/j.coco.2025.102554","url":null,"abstract":"<div><div>Understanding the mechanisms underlying fracture-energy enhancement in composite elastomers is critical for their practical applications such as stretchable electronics and soft robotics. While nanocomposite elastomers have been extensively studied, the role of micro-sized fillers in reinforcing composite elastomers remains less well defined. In this work, model composite elastomers consisting of polydimethylsiloxane and micro-sized aluminum fillers ranging from 1 μm to 50 μm were systematically investigated. Mechanical testing revealed that decreasing filler size significantly increased fracture energy, with the highest value observed in composites containing 1 μm aluminum. We demonstrate that this enhancement was attributed primarily to interfacial energy between fillers and the polymer matrix, as established through a refined neo-Hookean constitutive model combined with molecular dynamics simulations. Contrary to the bridging mechanisms observed in nanocomposites, analyses of polymer chain gyration radius, inter-filler spacing, and filler absorption layer thickness demonstrated that polymer chain bridging does not contribute to mechanical reinforcement in micro-filled systems. Instead, a coupling effect between absorption layer thickness and inter-filler distance governs modulus variation. A continental shelf-like model is proposed to conceptualize this coupling effect, and atomic force microscopy measurements validated both the interfacial absorption layer thickness. These findings provide new insights into the design principles governing the mechanical performance of elastomer composites reinforced with micro-sized fillers.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"58 ","pages":"Article 102554"},"PeriodicalIF":7.7,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144813913","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

Optimized Y2O3-Al2O3 sol derived Cf/YAG composite with reduced preparation cycles and enhanced mechanical properties 优化的Y2O3-Al2O3溶胶衍生的Cf/YAG复合材料，减少了制备周期，提高了力学性能

IF 7.7 2区材料科学

Composites Communications Pub Date : 2025-08-05 DOI: 10.1016/j.coco.2025.102551

Guihang Deng, Qingsong Ma, Lei Guo, Weide Wang, Kuanhong Zeng, Jianbo Song

{"title":"Optimized Y2O3-Al2O3 sol derived Cf/YAG composite with reduced preparation cycles and enhanced mechanical properties","authors":"Guihang Deng, Qingsong Ma, Lei Guo, Weide Wang, Kuanhong Zeng, Jianbo Song","doi":"10.1016/j.coco.2025.102551","DOIUrl":"10.1016/j.coco.2025.102551","url":null,"abstract":"<div><div>The sol-infiltration-heat treatment (SIH) process represents an ideal approach for fabricating continuous fiber reinforced yttrium aluminum garnet (Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub>, YAG) composites. However, the extended preparation period and the low mechanical properties of the derived composite have long been key challenges. An optimized Y<sub>2</sub>O<sub>3</sub>-Al<sub>2</sub>O<sub>3</sub> sol was synthesized with PEG employed as the dispersant, and the nano-sized colloidal particles were uniformly mixed and highly dispersed. The sol was characterized by high ceramic yield and mitigated etching effect on C fibers at elevated temperatures. The 3DN C<sub>f</sub>/YAG derived through significantly reduced preparation cycles exhibited superior mechanical properties with a flexural strength of 218.9 ± 8.6 MPa and a fracture toughness of 11.0 ± 1.1 MPa m<sup>0.5</sup>, observably outperforming similar sol derived C fiber reinforced composites and typical DSE YAG. The advancement in optimized Y<sub>2</sub>O<sub>3</sub>-Al<sub>2</sub>O<sub>3</sub> sol provided a fundamental boost for enhancing the applicability of the SIH route and developing high-performance YAG-based structural materials.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"58 ","pages":"Article 102551"},"PeriodicalIF":7.7,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144780889","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

Multifunctional polyimide/rGO aerogels with stain-responsive ultrabroadband microwave absorption properties and thermal insulation 具有染色响应超宽带微波吸收性能和隔热性能的多功能聚酰亚胺/氧化石墨烯气凝胶

IF 7.7 2区材料科学

Composites Communications Pub Date : 2025-08-02 DOI: 10.1016/j.coco.2025.102550

Qianhe Ji , Lu Yang , Hui-Ya Wang , Naharullah Jamaluddin , Juan Matmin , Yaofeng Zhu

{"title":"Multifunctional polyimide/rGO aerogels with stain-responsive ultrabroadband microwave absorption properties and thermal insulation","authors":"Qianhe Ji , Lu Yang , Hui-Ya Wang , Naharullah Jamaluddin , Juan Matmin , Yaofeng Zhu","doi":"10.1016/j.coco.2025.102550","DOIUrl":"10.1016/j.coco.2025.102550","url":null,"abstract":"<div><div>Multifunctional, responsive electromagnetic wave-absorbing materials (EMAs) with comprehensive performance are crucial for adapting to the ever-changing and extreme electromagnetic environment. To meet the demands of various application scenarios, we developed a compressible and thermally stable polyimide/reduced graphene oxide composite aerogel (PGA) via unidirectional freeze-drying and thermal annealing process. Polyimide endows the composite aerogel with outstanding thermal resistance and superior mechanical strength, with a weight loss of only 5 % at 440 °C and a compressive stress of up to 100 kPa at 60 % strain. Benefiting from the synergistic effect of porous structure and reasonable components, PGA exhibits an excellent minimum reflection loss of −58.32 dB and a broadened effective absorption bandwidth of 7.98 GHz (10.02–18.00 GHz) at a thickness of 3.9 mm. More importantly, compressing aerogels can alter their pore structure and conductive network to achieve high dynamic tunability of electromagnetic parameters, thereby enabling responsive microwave absorption performance. Notably, the PGA-18 successfully realizes complete coverage of the X and Ku bands through strain-induced regulation, confirming its applicability in ultra-broadband electromagnetic wave absorption. Additionally, the axially aligned lamellar structure and high porosity of the aerogel effectively suppress convective heat transfer and reduce thermal radiation, thereby imparting excellent thermal insulation and infrared stealth capabilities under high-temperature conditions. This work provides new insights into the design of multifunctional ultrawider EMAs with tunable electromagnetic characteristics, helping enable the next-generation electronic devices and stealth equipment.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"58 ","pages":"Article 102550"},"PeriodicalIF":7.7,"publicationDate":"2025-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144763881","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

Multi-scale design of the near-zero in-plane thermal expansion property of the woven all-C/C composite honeycomb sandwich structure 机织全C/C复合材料蜂窝夹层结构近零面内热膨胀性能的多尺度设计

IF 7.7 2区材料科学

Composites Communications Pub Date : 2025-07-30 DOI: 10.1016/j.coco.2025.102537

Xi Chen , Junxian Xiang , Jiahao Wang , Wentao Xu , Yiduan Zhang , Han Yan , Zhongwei Zhang , Jie Tao

{"title":"Multi-scale design of the near-zero in-plane thermal expansion property of the woven all-C/C composite honeycomb sandwich structure","authors":"Xi Chen , Junxian Xiang , Jiahao Wang , Wentao Xu , Yiduan Zhang , Han Yan , Zhongwei Zhang , Jie Tao","doi":"10.1016/j.coco.2025.102537","DOIUrl":"10.1016/j.coco.2025.102537","url":null,"abstract":"<div><div>The carbon/carbon honeycomb sandwich structure is an ideal solution for ultra-stable satellite platforms. The key to realize its application is to realize near zero thermal expansion design with consideration of different scale characteristics. This study establishes a multi-scale finite element model spanning micro-meso-macro levels to predict thermal expansion behavior of carbon/carbon honeycomb sandwich structures, achieving prediction errors of 11.03 % to the composite and 12.01 % to the sandwich structure. Based on the multi-scale model, optimizations are conducted for weaving patterns and structural dimensions. Analysis of the meso-scale model prediction shows that symmetric plain-woven carbon/carbon composites exhibit superior thermal stability with low thermal strain. When the spreading ratio of elliptical cross-section bundles is increased, the negative thermal strain of the composite is further reduced. Hence, weave structures of the cell wall and the panel are determined. Furthermore, optimal panel thickness, cell wall thickness and cell length combinations of the C/C sandwich structure are identified of (1.5 mm, 0.4 mm, 3 mm), (1.5 mm, 0.4 mm, 5 mm), and (3 mm, 0.2 mm, 3 mm) according to the macro-scale model prediction. Additionally, the configuration of the adhesive layer thickness of the above sandwich structures as 1.18 mm, 0.92 mm, and 0.74 mm respectively consequently achieves the in-plane zero thermal expansion of the sandwich structure. In summary, the zero thermal expansion coefficient design of carbon/carbon honeycomb sandwich structures is achieved through optimization of textile patterns and geometric parameters by multi-scale analysis.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"58 ","pages":"Article 102537"},"PeriodicalIF":7.7,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144738144","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

Bioinspired construction of organic-inorganic network for strengthening and toughening Poly(vinyl alcohol) with improved UV shielding and thermal performances 增强和增韧聚乙烯醇的有机-无机网络的仿生构建，提高了聚乙烯醇的紫外线屏蔽和热性能

IF 7.7 2区材料科学

Composites Communications Pub Date : 2025-07-30 DOI: 10.1016/j.coco.2025.102549

Bangchao Zhong , Sha Yao , Jiaojiao Jiang , Qiaoyu He , Jianlin Li

{"title":"Bioinspired construction of organic-inorganic network for strengthening and toughening Poly(vinyl alcohol) with improved UV shielding and thermal performances","authors":"Bangchao Zhong , Sha Yao , Jiaojiao Jiang , Qiaoyu He , Jianlin Li","doi":"10.1016/j.coco.2025.102549","DOIUrl":"10.1016/j.coco.2025.102549","url":null,"abstract":"<div><div>The preparation of biodegradable advanced polymer composite materials with combination of strength and toughness remains a significant challenge. In this work, inspired by the smart structure of spider silk, a biodegradable advanced poly(vinyl alcohol) (PVA) nanocomposite was designed via a biomimetic strategy using tannic acid (TA) grafted silica (SiO<sub>2</sub>) as a nanofiller-supported crosslinker (SiO<sub>2</sub>-s-TAS). The prepared PVA/SiO<sub>2</sub>-s-TAS nanocomposite exhibited simultaneously improved tensile strength and breaking strain, along with an increase in tensile toughness from 58.6 to 74.2 MJ/m<sup>3</sup> compared to the PVA/SiO<sub>2</sub> composite. The integration of high strength and good toughness in the PVA/SiO<sub>2</sub>-s-TAS nanocomposite was attributed to the nano-confinement effect around the SiO<sub>2</sub>-s-TAS nanoparticles and organic-inorganic dynamic network constructed by the PVA chains and SiO<sub>2</sub>-s-TAS via hydrogen bonds. Furthermore, the PVA/SiO<sub>2</sub>-s-TAS nanocomposite showed improved thermal stability, aging resistance and ultraviolet shielding performance. Therefore, this work offers a promising strategy for the preparation of advanced PVA composites, showing significant potential in biomedical engineering and advanced packaging fields.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"58 ","pages":"Article 102549"},"PeriodicalIF":7.7,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144750793","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