Article
Engineering, Multidisciplinary
D. S. -C. Liu, P. Hubert
Summary: This study examined how two impregnations during cure affect the laminate thickness of carbon fiber composites, leading to changes in air permeability and thickness deviations around corners. By using a noncontact eddy current thickness sensor to monitor the laminate thickness during debulking and curing processes, some methods were found to reduce cycle time.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Klaus Heller, David Colin, Klaus Drechsler
Summary: In automated fiber placement (AFP), understanding the interaction between material properties and process parameters is crucial for cost-efficient manufacturing. This study quantifies the changes in mechanical properties and tack of uncured prepreg tapes over time, and investigates their impact on the occurrence of defects during AFP lay-up trials.
FRONTIERS IN MATERIALS
(2022)
Article
Economics
Ammar Abulibdeh
Summary: This study investigates the impact of economic growth, electricity consumption, energy consumption, and the crop production index on environmental quality in Qatar. The results show that electricity consumption, energy consumption, and the crop production index have a positive relationship with greenhouse gas emissions, while economic growth has a negative relationship in the long term.
Article
Engineering, Manufacturing
Vincent K. Maes, Arjun Radhakrishnan, Jamie Hartley, Stuart Sykes, James Kratz
Summary: This study investigates the consolidation of unidirectional carbon-epoxy prepreg layers during lay-up and oven vacuum bag moulding. The pressure measurements using flexible thin-film pressure sensors show that the excess pressure on external corners decreases during moulding, while internal corners experience ply-bridging and result in thickening and voids.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Engineering, Manufacturing
C. Netzel, D. Hoffmann, M. Battley, P. Hubert, S. Bickerton
Summary: The study focuses on defect formation in autoclave prepreg processing, specifically on concave female corners. It shows that humidity exposure affects uncured prepreg characteristics and consolidation quality, with defects already occurring during layup and debulking processes.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Review
Chemistry, Multidisciplinary
Michael Zumstein, Glauco Battagliarin, Andreas Kuenkel, Michael Sander
Summary: This paper discusses the unique properties and importance of biodegradability of water-soluble polymers in various applications, as well as the critical requirements for testing the biodegradability of WSPs.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Multidisciplinary Sciences
Jussara Camara Cardozo, Inalmar Barbosa D. Segundo, Edney R. V. P. Galvao, Djalma R. da Silva, Elisama V. dos Santos, Carlos A. Martinez-Huitle
Summary: This study proposes a smartphone imaging-based method for analyzing chemical oxygen demand (COD) and color. The smartphone camera and application have higher accuracy than the spectrophotometer for analyzing COD. The smartphone method also provides a wider range for color analysis compared to the spectrophotometer. This study contributes to public water monitoring policies.
SCIENTIFIC REPORTS
(2023)
Article
Environmental Sciences
Gabriel Enrique De-la-Torre, Diana Carolina Dioses-Salinas, Sina Dobaradaran, Joerg Spitz, Mozhgan Keshtkar, Razegheh Akhbarizadeh, Delaram Abedi, Abbasali Tavakolian
Summary: This study evaluated the physicochemical degradation of personal protective equipment (PPE) in the marine environment and found that PPE undergoes changes in polymer backbone, crystallinity, and physical integrity due to sun exposure. The presence of harmful elements and signs of physical degradation were also detected. These findings contribute to a better understanding of PPE degradation in the marine environment and the subsequent release of microplastics and chemical contaminants.
MARINE POLLUTION BULLETIN
(2022)
Article
Green & Sustainable Science & Technology
I Bianchi, A. Forcellese, M. Marconi, M. Simoncini, A. Vita, V Castorani
Summary: This study evaluates the environmental impact of an innovative technology for reclaiming carbon fiber prepreg scraps, showing a significant reduction in environmental impacts compared to traditional composite production processes. The innovative process can effectively recycle waste materials and produce recycled composite parts, demonstrating a more sustainable manufacturing alternative for composite products.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2021)
Article
Environmental Sciences
Shannen T. L. Sait, Lisbet Sorensen, Stephan Kubowicz, Kristine Vike-Jonas, Susana Gonzalez, Alexandros G. Asimakopoulos, Andy M. Booth
Summary: This study investigated the environmentally relevant photodegradation of common microplastic fibres (MPFs) such as polyester (PET), polyamide (PA), and polyacrylonitrile (PAN). Results showed that PET and PA MPFs underwent significant fragmentation and surface changes under UV exposure, while PAN did not. Chemical analysis identified monomers, UV stabilisers, and degradation products in MPFs and aqueous leachates. Bisphenols (BPs) and benzophenones (BzPs) were also found in all MPFs, with wool displaying the highest concentration of BPs and BzPs.
ENVIRONMENTAL POLLUTION
(2021)
Article
Materials Science, Composites
Eduardo Szpoganicz, Martin Demleitner, Fabian Huebner, Youngseok Oh, Youngdo Kweon, Hyojae Lee, Volker Altstaedt, Holger Ruckdaeschel
Summary: In this study, an empirical correlation between the tack of phenolic prepregs and the rheological state of the base resin was established through multivariable analyses. The interaction between resin and filler was found to effectively change the resin viscosity, regulating the prepreg tackiness level. By systematically varying the conversion state and operating temperature, inherent phenolic resin properties were thoroughly determined to understand their impact on final composite tack property.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Industrial
Salman Jahani, Shiyu Zhou, Dharmaraj Veeramani
Summary: This paper introduces a method utilizing Brownian motion process and penalized splines to model multiple time-varying environmental covariates and the drift relationship of the degradation process. The approach does not assume a functional form for the degradation process drift and takes into account the effects of multiple environmental factors on the degradation process.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(2021)
Article
Engineering, Chemical
G. Y. H. Choong, A. Endruweit, D. S. A. De Focatiis
Summary: The relationship between prepreg tack and the degree of intimate contact (DoIC) between prepreg and a rigid substrate was explored through continuous application-and-peel test method. It was found that optimal feed rates and compaction pressure could increase tack and contact area. As feed rates decrease, both true contact area and tack increase, but at a critical rate, the bond failure mechanism switches from adhesive to cohesive failure.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2021)
Article
Thermodynamics
Z. Y. Jiang, J. Y. Li, Z. G. Qu, L. Wang, J. Y. Miao
Summary: In this study, a mechanism-based prediction method is proposed to predict the loss of silicone thermal grease in a space environment. The variation in effective thermal conductivity is evaluated to realize the prediction of long-term loss. The dominant factor gradually changes from capillary loss to volatilisation loss during dry-out degradation.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Environmental Sciences
Azyyati Anuar, Nur Fakhzan Marwan, John Smith, Sirinya Siriyanun, Arshian Sharif
Summary: This study examined 1372 articles published from 2000 to 2020 on immigration and environmental degradation using bibliometric analysis. The research found that since 2000, most scholars actively produced articles relevant to this topic, primarily published in journals and in English. The United States played a significant role in contributing publications, with articles mainly in the fields of environmental science, agricultural and biological sciences, arts and humanities, and earth and planetary sciences.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Manufacturing
Wenwu Zhang, Helezi Zhou, Bin Huang, Huamin Zhou, Xiongqi Peng
Summary: This paper investigates the tool-ply friction behavior of jute/PLA biocomposites in thermoforming. A pull-through friction testing device was developed to characterize the tool-ply friction behavior of jute/PLA prepreg at elevated temperature. The effects of alkali treatment, fiber orientation, normal force, and slipping velocity were studied, and a quantitative definition of tool-ply friction behavior was achieved. The results indicate a strong relationship between tool-ply friction behavior and woven and fiber structures, indicating hydrodynamic lubrication.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Stephen Clay, Wesley Ault, Alex Faupel, Caglar Oskay, Philip Knoth, Noam N. Y. Shemesh, Rami Haj-Ali, Uri Breiman, Ido Meshi, Ofir Shor
Summary: This paper presents an experimental investigation on the compression failure mechanisms of laminated carbon fiber reinforced composites under non-standard quasi-static loading. The results demonstrate the presence of interior kink bands, surface ply splitting, and delaminations, with each failure mechanism associated with different stress levels.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Bowen Zeng, Jinlong Yang, Zhi Ni, Yucheng Fan, Ziyan Hang, Chuang Feng
Summary: This study successfully improved the pyroelectric properties of PVDF films by preparing functionally graded graphene nanoplatelet (FG-GNP) reinforced PVDF composite films. The increase in the number of layers and the concentration of GNP near the surface of the composite film were found to enhance the pyroelectric properties and temperature stability.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Shenghe Zhang, Fukai Chu, Weizhao Hu, Bibo Wang, Richard K. K. Yuen, Yuan Hu
Summary: This study improves the flame retardancy and mechanical properties of PBAT by synthesizing a phosphorus-containing intercalator and mixing it into the PBAT matrix.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Tharan Gordon, Michael R. Wisnom, Byung Chul Kim
Summary: Thickness tapering is a common strategy for efficient and lightweight composite structures, but it can introduce delamination sites. This study investigated the use of ply scarfing method to improve the compressive failure stress of tapered laminates made from thick unidirectional non-crimp fabrics. The results showed that ply scarfing suppressed delamination and increased the failure stress by 60%.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Xin Wang, Yiting Qu, Junlei Bai, Fujun Xu, Bin Ding, Xiaohua Zhang
Summary: A solution-based strategy is proposed to achieve a strong bond between fibers and matrix in powder materials, resulting in improved mechanical properties, thermal conductivity, and fracture strain of the composites. The method also offers advantages such as enhanced powder flowability and thermal stability.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Xing Zhou, Guosheng Wang, Dexiang Li, Qi Wang, Keming Zhu, Yaya Hao, Yueyang Xu, Neng Li
Summary: This study successfully synthesized polyurethane elastomer by using degraded products from waste PET, and fabricated composites with carbon nanotubes for strain sensors. The composites showed good mechanical and durability performance, indicating a potential method for recycling waste PET into valuable and functional materials.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Fei Peng, Tingting Shan, Rongrui Chen, Jiulong Shi, Di Liu, Guoqiang Zheng, Chaojun Gao, Kun Dai, Chuntai Liu, Changyu Shen
Summary: Janus polymer films with distinct surface performance and potential applications were successfully prepared by vacuum-assisted hot-compressing method and spray coating. These films exhibit decent actuation performance and rapid selfpowered sensing property, and can be used for real-time acetone monitoring system.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Biao Cheng, Huafeng Quan, Yuefeng Zhang, Dong Huang, Tongqi Li, Chong Ye, Xingming Zhou, Zhen Fan, Yafang Zhang, Ting Ouyang, Fei Han, Hongbo Liu, Jinshui Liu
Summary: In this study, a binary graphite network was constructed to improve the thermal conductivity and control the formation of micrometer-scale open pores in phase change composites. The developed composites showed a high thermal conductivity and phase change enthalpy, making them promising for thermal control in space optical-mechanical systems and other critical aerospace components.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Shihao Zuo, Fei Cheng, Guangming Yang, Jiangzhou Li, Yongjun Deng, Guangjun Gou, Xuejun Cui, Yunsen Hu, Xiaozhi Hu
Summary: Micro-arc oxidation (MAO) treatment was used to modify aluminum (Al) alloys in order to improve bond strength with carbon fiber reinforced polymer (CFRP). The treatment successfully created a porous surface with better hardness, roughness, and wetting, and introduced resin pre-coating (RPC) and carbon nanotube (CNT) fiber bridging to improve the bonding interface. The combined treatments significantly increased the bond strength by up to 156.1%, indicating the feasibility of MAO as an alternative method for manufacturing high-performance Al-CFRP composites in industrial production.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
James Kratz, Christophe Paris, Karolina Gaska, Vincent Maes, Ivana Partridge, Philippe Olivier
Summary: Faster heating rates and higher process temperatures can reduce the total process time while achieving the same degree-of-cure. Thermal analysis shows that thermoplastic interleaf particles melt at the recommended curing temperature. A short dwell at a lower temperature can prevent the mixing of thermoplastic particles and thermoset pre-polymer.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Thomas Maierhofer, Evripides G. Loukaides, Craig Carr, Chiara Bisagni, Richard Butler
Summary: Joining thermoset composites via resistance welding provides an efficient method for aerospace structures with benefits such as high-volume manufacturing and simplified surface preparation. The influence of welding parameters on joint performance is assessed using Mode I fracture toughness testing. A Bayesian approach is employed to select high-performance parameters.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Jiangan You, Ling Cai, Ronghua Yu, Haiping Xing, Jian Xue, Ying Li, Zhiwei Jiang, Dongmei Cui, Tao Tang
Summary: In response to the global environmental pollution crisis caused by waste plastics, recyclable design is an effective solution. A CPVC/PUA nanocomposite foam was developed using the plasticizing-foaming-reinforcing strategy, combined with catalytic carbonization. The foam exhibited high expansion ratio, robustness, solvent resistance, flame-triggered shape memory effect, and ablation resistance. The foam could be directly upcycled into functional carbon foam with attractive electromagnetic interference shielding performance.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Siyao Chen, Zhiyu Chen, Yangling Ou, Junwei Lyu, Junning Li, Xiangyang Liu, Yang Liu
Summary: In this study, we demonstrated the significant effect of composite interface on temperature increase in electrical heaters. By selectively fluorinating the outer walls of carbon nanotubes and compositing them with cellulose nanofibers, improved interfacial phonon diffusion was achieved, leading to a higher temperature increase rate.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Yanjun He, Agnieszka Suliga, Alex Brinkmeyer, Mark Schenk, Ian Hamerton
Summary: A new thermoset resin system based on a polybenzoxazine blend showed good performance under high ATOX irradiation. It reduced erosion yield by forming a silicon-rich surface layer and improved the mechanical properties of CFRP laminates.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)