Composites Part B: Engineering最新文献_第3页

Interphase mechanics vs chemical compatibility: Generating a deformable PA6-carbon fiber interphase 相间力学与化学相容性：生成可变形的 PA6-碳纤维间相

IF 12.7 1区材料科学

Composites Part B: Engineering Pub Date : 2024-11-06 DOI: 10.1016/j.compositesb.2024.111915

Sameh Dabees , Ameya Borkar , James D. Randall, Bhagya Dharmasiri, David J. Hayne, Ken Aldren S. Usman, Joselito M. Razal, Žan Simon, Ben Newman, Filip Stojcevski, Jaineel K. Shah, Luke C. Henderson

{"title":"Interphase mechanics vs chemical compatibility: Generating a deformable PA6-carbon fiber interphase","authors":"Sameh Dabees , Ameya Borkar , James D. Randall, Bhagya Dharmasiri, David J. Hayne, Ken Aldren S. Usman, Joselito M. Razal, Žan Simon, Ben Newman, Filip Stojcevski, Jaineel K. Shah, Luke C. Henderson","doi":"10.1016/j.compositesb.2024.111915","DOIUrl":"10.1016/j.compositesb.2024.111915","url":null,"abstract":"<div><div>Good interfacial adhesion is typically correlated to obtaining the best tensile/flexural performance for carbon fibre-reinforced composites. The nature or even presence of the interphase, a localized region around the fibre-matrix junction, is often discussed but notoriously difficult to visualize and characterise. Here, a surface-initiated electro-polymerization approach to covalently graft either polyacrylamide or polygylcidyl methacrylate to the carbon fibres was used. This was followed by continuous melt compounding into the polyamide-6 matrix prior to injection moulding. Analysis via X-ray photoelectron spectroscopy (XPS) coupled with topological/visual study through scanning electron microscopy (SEM), showed distinct surface changes after modification and at the composite fracture surface. Additionally, mechanical (tensile, flexural, and tribological characteristics) and thermal (differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA)) investigations were performed. The results showed that the unmodified CF samples exhibit higher tensile and flexural modulus than the modified CF samples. However, the wear rate has been significantly decreased for modified CF samples. SEM of fractured composite surfaces showcased a clear interphase region surrounding the fibre, highlighting the importance of interphase/interphase mechanics in the design of optimal composite interfaces.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"289 ","pages":"Article 111915"},"PeriodicalIF":12.7,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interfacial property optimization through the co-deployment of MOF-derived nickel phyllosilicate and DOPO: Effective reinforcement and flame retardancy of epoxy resin 通过共同部署 MOF 衍生的硅酸镍和 DOPO 优化界面特性：环氧树脂的有效增强和阻燃性能

IF 12.7 1区材料科学

Composites Part B: Engineering Pub Date : 2024-11-05 DOI: 10.1016/j.compositesb.2024.111947

Shibin Nie , Zongquan Zhao , Wenli Zhai , Jinian Yang , Hong Zhang , Dongyue Zhao , Jingwen Wang

{"title":"Interfacial property optimization through the co-deployment of MOF-derived nickel phyllosilicate and DOPO: Effective reinforcement and flame retardancy of epoxy resin","authors":"Shibin Nie , Zongquan Zhao , Wenli Zhai , Jinian Yang , Hong Zhang , Dongyue Zhao , Jingwen Wang","doi":"10.1016/j.compositesb.2024.111947","DOIUrl":"10.1016/j.compositesb.2024.111947","url":null,"abstract":"<div><div>Epoxy resin (EP) is a versatile material widely employed in diverse fields such as electronic encapsulation, coatings, and adhesives. The optimization of flame-retardant, mechanical and interfacial properties in composites through material modification and compounding represents a prominent research focus within the field of EP. This study presents a novel approach by synthesizing MOF-derived nickel phyllosilicate (K–NiPS) and compounding it with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) into the EP matrix. The incorporation of 5 wt% total K–NiPS and DOPO, with a mass ratio of 2:3, achieves a UL-94 V-0 rating and enhances the limiting oxygen index from 23.5 to 28.8 %. This combination also reduced the peak heat release rate, peak smoke release rate, and total smoke release by 44.6 %, 53.6 %, and 37.8 % respectively. Besides, the interface optimization effect of K–NiPS in collaboration with DOPO improved the tensile strength of EP/2K–NiPS/3DOPO from 77.5 MPa to 94.3 MPa, and the wear rate was only 1.25 × 10<sup>−5</sup> mm<sup>3</sup>/(N·m), which is 82.2 % lower than that of pure EP. This study will pave the way for the applied interface design of multi-functional EP.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"289 ","pages":"Article 111947"},"PeriodicalIF":12.7,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Laser powder bed fusion of high-strength crack-free Al7075 alloy with the in-situ formation of TiB2/Al3Ti-reinforced phases and nucleation agents 激光粉末床熔化高强度无裂纹 Al7075 合金，原位形成 TiB2/Al3Ti- 增强相和成核剂

IF 12.7 1区材料科学

Composites Part B: Engineering Pub Date : 2024-11-05 DOI: 10.1016/j.compositesb.2024.111940

Yanzhen Liang , Quanquan Han , Zhongyang Sui , Zhenhua Zhang , Han Zhang , Heng Gu , Defan Wu , Liqiao Wang , Hanlian Liu , Rossitza Setchi

{"title":"Laser powder bed fusion of high-strength crack-free Al7075 alloy with the in-situ formation of TiB2/Al3Ti-reinforced phases and nucleation agents","authors":"Yanzhen Liang , Quanquan Han , Zhongyang Sui , Zhenhua Zhang , Han Zhang , Heng Gu , Defan Wu , Liqiao Wang , Hanlian Liu , Rossitza Setchi","doi":"10.1016/j.compositesb.2024.111940","DOIUrl":"10.1016/j.compositesb.2024.111940","url":null,"abstract":"<div><div>The existence of solidification cracks caused by columnar grains in precipitation-hardened aluminium alloys limit the applicability of Al7075 components manufactured via laser powder bed fusion (LPBF) additive manufacturing. A novel approach was developed to co-incorporate submicron-sized B and micron-grade Ti6Al4V to eliminate hot cracks and to effectively transform coarse columnar grains into fine equiaxed grains, thus improving the mechanical performance of LPBF-fabricated modified Al7075 material. The grain refinement was mainly attributable to the heterogeneous nucleation promoted by the combination of in-situ-formed L1<sub>2</sub>-Al<sub>3</sub>Ti and TiB<sub>2</sub> nano-sized phases. After an optimised T6 heat treatment, excellent comprehensive mechanical properties were achieved, with a tensile strength of 460 MPa and an elongation of 13 %. This research provides an efficient and cost-effective path for addressing crack-sensitive metallic materials used for LPBF additive manufacturing processes.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"289 ","pages":"Article 111940"},"PeriodicalIF":12.7,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

hUCMSC-derived exosomes mitigate blood-spinal cord barrier disruption by activating AMPK/mTOR-mediated autophagic flux after acute spinal cord injury 急性脊髓损伤后，源自 hUCMSC 的外泌体通过激活 AMPK/mTOR 介导的自噬通量，缓解血液-脊髓屏障的破坏

IF 12.7 1区材料科学

Composites Part B: Engineering Pub Date : 2024-11-05 DOI: 10.1016/j.compositesb.2024.111944

Zhiheng Chen , Shengting Wu , Shihao Sheng , Sicheng Wang , Yuxuan Qian , Xin Wang , Fengjie Lu , Qi Han , Xiao Chen , Jiacan Su , Xiaofeng Lian

{"title":"hUCMSC-derived exosomes mitigate blood-spinal cord barrier disruption by activating AMPK/mTOR-mediated autophagic flux after acute spinal cord injury","authors":"Zhiheng Chen , Shengting Wu , Shihao Sheng , Sicheng Wang , Yuxuan Qian , Xin Wang , Fengjie Lu , Qi Han , Xiao Chen , Jiacan Su , Xiaofeng Lian","doi":"10.1016/j.compositesb.2024.111944","DOIUrl":"10.1016/j.compositesb.2024.111944","url":null,"abstract":"<div><div>After spinal cord injury (SCI), the integrity of the blood-spinal cord barrier (BSCB) can be disrupted, leading to the secondary injuries such as inflammatory cell infiltration, neuronal death, and spinal cord hematoma. It is important to maintain the integrity of the BSCB to help restore function following SCI. While some studies have demonstrated the therapeutic effects of exosomes derived from human umbilical cord mesenchymal stem cells (hUCMSC-exos), their role in preserving BSCB integrity remains unclear. In our study, we demonstrated the protective effects of hUCMSC-exos on the BSCB and its mechanism. The results of this study indicate that hUCMSC-exos promote motor function recovery, preserve spinal cord structure, and reduce neuronal loss by inhibiting BSCB leakage following SCI. Experimental investigations conducted in vivo and in vitro have demonstrated that hUCMSC-exos can mitigate the loss of adherens junctions (AJs) and tight junctions (TJs) and stimulate autophagy in spinal cord endothelial cells. The protective effects were also found to be significantly reversed following the inhibition of autophagy using 3-MA. In conclusion, our study demonstrates that hUCMSC-exos protect the integrity of BSCB by promoting the repair of spinal endothelial cells through activation of autophagy, thereby exerting a protective role in SCI.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"289 ","pages":"Article 111944"},"PeriodicalIF":12.7,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Exploring ultrasonic and resistance welding for thermoplastic composite structures: Process development and application potential 探索热塑性复合材料结构的超声波焊接和电阻焊接：工艺开发和应用潜力

IF 12.7 1区材料科学

Composites Part B: Engineering Pub Date : 2024-11-05 DOI: 10.1016/j.compositesb.2024.111927

Lars Larsen, Manuel Endrass, Stefan Jarka, Simon Bauer, Maximilian Janek

{"title":"Exploring ultrasonic and resistance welding for thermoplastic composite structures: Process development and application potential","authors":"Lars Larsen, Manuel Endrass, Stefan Jarka, Simon Bauer, Maximilian Janek","doi":"10.1016/j.compositesb.2024.111927","DOIUrl":"10.1016/j.compositesb.2024.111927","url":null,"abstract":"<div><div>Thermoplastic composites outperform in aerospace applications compared to thermoset composites due to their weldability, a key advantage. This feature streamlines manufacturing, allowing for precise assembly of complex shapes, reducing costs, and accelerating production. Additionally, it simplifies maintenance, enabling easy repair or replacement of damaged parts, thereby extending vehicle lifespan and minimizing downtime. With exceptional strength-to-weight ratio and resistance to corrosion and fatigue, weldable thermoplastic composites ensure reliable performance in the demanding aerospace environment. Overall, their weldability enhances efficiency, versatility, and safety in aerospace applications. This paper first presents an overview of various welding processes and discusses the special challenges of assembly processes in the aviation industry. This work then focuses from the authors’ perspective with regard to industrializability on the two most promising processes, resistance and ultrasonic welding.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"289 ","pages":"Article 111927"},"PeriodicalIF":12.7,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

“Janus” PEEK implant with sandwich Mg-containing coating for infected tissue repair 带有夹层含镁涂层的 "Janus "聚醚醚酮植入体，用于感染组织修复

IF 12.7 1区材料科学

Composites Part B: Engineering Pub Date : 2024-11-05 DOI: 10.1016/j.compositesb.2024.111938

Xingdan Liu , Haifeng Zhang , Ji Tan , Ziyi Lu , Xiaochun Peng , Liping Ouyang , Xuanyong Liu

{"title":"“Janus” PEEK implant with sandwich Mg-containing coating for infected tissue repair","authors":"Xingdan Liu , Haifeng Zhang , Ji Tan , Ziyi Lu , Xiaochun Peng , Liping Ouyang , Xuanyong Liu","doi":"10.1016/j.compositesb.2024.111938","DOIUrl":"10.1016/j.compositesb.2024.111938","url":null,"abstract":"<div><div>Having good antibacterial properties and promoting soft and hard tissue repair are the keys to successful implantation of intraosseous transcutaneous. Polyether ether ketone (PEEK) is a class of FDA-approved polymer implants. However, the surface of PEEK is bioinert, which is easy to cause postoperative infection and poor tissue integration. In this study, polypyrrole (Ppy) was polymerized on sulfonated PEEK, Mg<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub> nanosheets were grown in situ on one side, and polycaprolactone (PCL) was then spun on the surface to form a Janus-like surface on PEEK. The Ppy/Mg<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>/PCL composite coating could inhibit bacterial adhesion, and the excellent photothermal properties of Ppy/Mg<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>/PCL and Ppy coatings further promote the removal of bacteria due to the accumulated heat. After the infection was eliminated, the Janus-like surface of modified PEEK switched macrophages to anti-proinflammatory response and promoted both soft and hard tissue repair. The Ppy modified sulfonated PEEK could promote collagen secretion in the soft tissue, while the PCL films on Ppy/Mg<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>/PCL was densified by temperature response under near-infrared light treatment to close the exposed interface of Mg<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub> nanosheets that was more conducive to bone repair. In summary, PEEK with Janus-like surface consisting of Ppy/Mg<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>/PCL and Ppy has multiple biological functions of sequential antibacterial and soft and hard tissue repair, and is a promising candidate material for intraosseous transcutaneous implants.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"289 ","pages":"Article 111938"},"PeriodicalIF":12.7,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Vine-inspired 3D self-supporting spiral networks enable all-polymer composites advanced dielectric properties and isotropic thermal management 受葡萄树启发的三维自支撑螺旋网络实现了全聚合物复合材料的先进介电性能和各向同性热管理功能

IF 12.7 1区材料科学

Composites Part B: Engineering Pub Date : 2024-11-05 DOI: 10.1016/j.compositesb.2024.111942

Qibin Xu, Shengchang Zhang, Yingying Zhao, KaiXiang Wang, Shuheng Liang, Yuanyuan Yu, Yan Jiang, Baolong Xue, Mengjin Jiang, Pengqing Liu

{"title":"Vine-inspired 3D self-supporting spiral networks enable all-polymer composites advanced dielectric properties and isotropic thermal management","authors":"Qibin Xu, Shengchang Zhang, Yingying Zhao, KaiXiang Wang, Shuheng Liang, Yuanyuan Yu, Yan Jiang, Baolong Xue, Mengjin Jiang, Pengqing Liu","doi":"10.1016/j.compositesb.2024.111942","DOIUrl":"10.1016/j.compositesb.2024.111942","url":null,"abstract":"<div><div>Traditionally, it has been considered impossible to overcome the directional limitations associated with polarization and thermal conductivity (λ) in laminated all-polymer composites, which are essential for signal transmission and heat dissipation in fifth-generation equipment shells. Herein, by utilizing hierarchical weaving technology, a vine-like three-dimensional (3D) ultrahigh molecular weight polyethylene (UHMWPE) spiral network is created in laminated ramie-reinforced composites. This unique spiral structure ensures polarization balance by continuously dispersing functional UHMWPE crystals in multiple directions, and it safeguards the micro/nanopores (air carriers) of ramie through self-support, thereby achieving exceptional microwave transmittance (98.3 %). Remarkably, this structure effectively overcomes the limitations of thermal paths in laminated composites along their vertical plane directions, thus simultaneously obtaining high in-plane λ (3.3354 W/mK) and through-plane λ (3.2756 W/mK). This novel approach based on a functional crystal-based 3D spiral network challenges the stereotypes regarding all-polymer composites, particularly in terms of advanced dielectric properties and isotropic thermal management.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"289 ","pages":"Article 111942"},"PeriodicalIF":12.7,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Electrophoretic deposition of curcumin-loaded mesoporous bioactive glass nanoparticle-chitosan composite coatings on titanium for treating tumor-induced bone defect 在钛上电泳沉积姜黄素负载介孔生物活性玻璃纳米粒子-壳聚糖复合涂层，用于治疗肿瘤诱导的骨缺损

IF 12.7 1区材料科学

Composites Part B: Engineering Pub Date : 2024-11-05 DOI: 10.1016/j.compositesb.2024.111950

Yuhan Zhang , Jingjie Yu , Chenhuan Wu , Lehao Han , Yunru Tai , Boyan Wang , Yujing Yan , Yekai Liu , Yihan Sun , Qinqin Lu , Kai Zheng , Tian Zhou , Qiang Chen

{"title":"Electrophoretic deposition of curcumin-loaded mesoporous bioactive glass nanoparticle-chitosan composite coatings on titanium for treating tumor-induced bone defect","authors":"Yuhan Zhang , Jingjie Yu , Chenhuan Wu , Lehao Han , Yunru Tai , Boyan Wang , Yujing Yan , Yekai Liu , Yihan Sun , Qinqin Lu , Kai Zheng , Tian Zhou , Qiang Chen","doi":"10.1016/j.compositesb.2024.111950","DOIUrl":"10.1016/j.compositesb.2024.111950","url":null,"abstract":"<div><div>Clinical treatment of osteosarcoma (OS) presents significant challenges in postoperative tumor recurrence and large segmental bone defects, often necessitating joint replacement or artificial bone implantation to repair failed or defective bone tissue. At the same time, fibroblastic encapsulation can impede direct contact between implants and bones, leading to implant failure. To tackle these issues, mesoporous bioactive glass nanoparticles (MBN) were synthesized and then loaded with curcumin (CUR). Subsequently, chitosan (CTS) was chosen as the charger and coating matrix, and electrophoretic deposition (EPD) was utilized to fabricate a CTS-MBN-CUR composite coating with triple functionality on Ti implants aiming for OS-induced bone repair. MBN-CUR nanoparticles are encapsulated in CTS and uniformly distributed within the coating, achieving robust adhesion and long-term release of CUR. Concurrently, the developed CTS-MBN-CUR coating exhibits moderate hydrophilicity, and good bioactivity. Moreover, three different types of cells, MC3T3-E1, L929, and MG63 cells, were individually cultured with the composite coating and subjected to comprehensive cellular studies. The coating presented favorable bioactivities, and osteogenic performance, and the ability to resist the activity of fibroblast and OS cells. These findings suggest that CTS-MBN-CUR holds promising potential for bone regeneration following OS resection surgery.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"289 ","pages":"Article 111950"},"PeriodicalIF":12.7,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Carbon nanotube intermediate layer intercalation and its influence on surface charge of thin film composite membrane 碳纳米管中间层插层及其对薄膜复合膜表面电荷的影响

IF 12.7 1区材料科学

Composites Part B: Engineering Pub Date : 2024-11-05 DOI: 10.1016/j.compositesb.2024.111951

Luyao Deng , Ralph Rolly Gonzales , Joy Thomas , Ryosuke Takagi , Wenming Fu , Cheng-Liang Liu , Shang Xiang , Hideto Matsuyama

{"title":"Carbon nanotube intermediate layer intercalation and its influence on surface charge of thin film composite membrane","authors":"Luyao Deng , Ralph Rolly Gonzales , Joy Thomas , Ryosuke Takagi , Wenming Fu , Cheng-Liang Liu , Shang Xiang , Hideto Matsuyama","doi":"10.1016/j.compositesb.2024.111951","DOIUrl":"10.1016/j.compositesb.2024.111951","url":null,"abstract":"<div><div>The surface charge of a separation membrane is a critical factor affecting its performance in ion separation and fouling resistance. Thin-film composite (TFC) polyamide (PA) membrane, commonly used in water treatment, often suffer from excessive surface negative charges, which significantly limits their application and fouling resistance. To address this issue, this work introduces a carbon nanotubes (CNT) intermediate layer to adjust the surface charge of TFC PA membranes, aiming to achieve a PA layer with neutral properties. Novel grazing-incidence wide-angle x-ray scattering (GIWAXS) measurements were employed to elucidate the effect of CNT on the molecular chain stacking of PA. The CNT intermediate layer was found to influence the PA cross-linking, which is related to surface negative charge, by controlling the storage and release of the <em>m-</em>phenylenediamine monomer during interfacial polymerization. The neutral CNT-TFC membrane demonstrated improved NH<sub>4</sub><sup>+</sup> retention and increased resistance to fouling by protein, surfactant, and <em>E. coli</em>. However, other surface properties, such as roughness and hydrophilicity, could counteract the antifouling benefits of a neutral surface. This work provides insights into additional advantages of CNT intermediate layer intercalation in TFC PA membranes, such as enhanced cross-linking and surface charge control.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"289 ","pages":"Article 111951"},"PeriodicalIF":12.7,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical and electromagnetic interference shielding properties of in-situ grown Si3N4nw synergistic defective-graphene reinforced alumina ceramics 原位生长的 Si3N4nw 协同缺陷石墨烯增强氧化铝陶瓷的机械和电磁干扰屏蔽性能

IF 12.7 1区材料科学

Composites Part B: Engineering Pub Date : 2024-11-05 DOI: 10.1016/j.compositesb.2024.111945

Yameng Jiao , Qiang Song , Xu Yang , Liyuan Han , Caixiang Xiao , Fei Zhao , Hejun Li

{"title":"Mechanical and electromagnetic interference shielding properties of in-situ grown Si3N4nw synergistic defective-graphene reinforced alumina ceramics","authors":"Yameng Jiao , Qiang Song , Xu Yang , Liyuan Han , Caixiang Xiao , Fei Zhao , Hejun Li","doi":"10.1016/j.compositesb.2024.111945","DOIUrl":"10.1016/j.compositesb.2024.111945","url":null,"abstract":"<div><div>Ceramic matrix composites have versatile application potential but are astricted by brittleness and single function. It can be ameliorated assisted by reinforcements, but the uneven distribution of reinforcements seriously limits the reinforcing efficiency. In this work, the layered porous skeleton of alumina (Al<sub>2</sub>O<sub>3</sub>) and silicon dioxide (SiO<sub>2</sub>) was prepared, then defective-graphene (DG) and silicon nitride nanowires (Si<sub>3</sub>N<sub>4</sub>nw) were successively grown in-situ in the skeleton (Al<sub>2</sub>O<sub>3</sub>/SiO<sub>2</sub>-G-Si<sub>3</sub>N<sub>4</sub>nw) to concurrently strength and toughen, as well as endow Al<sub>2</sub>O<sub>3</sub> ceramic with electromagnetic interference (EMI) shielding performance. Subsequently, Al<sub>2</sub>O<sub>3</sub>/SiO<sub>2</sub>-G-Si<sub>3</sub>N<sub>4</sub>nw preform was sintered to construct a uniform Si<sub>3</sub>N<sub>4</sub>nw synergistic DG enhancement network. The optimum flexural strength and fracture toughness of the sintered ceramic reached 388.52 MPa and 11.29 MPa m<sup>1/2</sup>, respectively. This was mainly since DG can fine the ceramic grains, induce crack deflection and furcation, while the uniformly distributed Si<sub>3</sub>N<sub>4</sub>nw consumed additional energy during the pull-out process. In addition, the EMI shielding effectiveness of the sintered ceramics in X-band was up to 31.77 dB, which is mainly attributed to the conductive loss, dipole polarization loss and interfacial polarization loss of DG. Remarkably, this work provides an idea for efficient strengthening, toughening and integration of structure and function.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"289 ","pages":"Article 111945"},"PeriodicalIF":12.7,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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