Results in Materials最新文献

{"title":"Integration of recycled denim waste cotton fibre and jute fibre in thermoplastic bio composite applications","authors":"Akhi Mandal,&nbsp;Ahasan Habib,&nbsp;Basodeb Paul,&nbsp;Mainul Islam,&nbsp;Bashir Ahamed,&nbsp;Shafiqul Islam,&nbsp;Forkan Sarker","doi":"10.1016/j.rinma.2024.100611","DOIUrl":"10.1016/j.rinma.2024.100611","url":null,"abstract":"<div><p>High-stiffness and high-strength natural fibres are commonly utilized in thermoplastic matrices to manufacture biobased thermoplastic composites. Low-end applications such as construction and furniture industries do not require a high load-bearing capacity, thus favoring cost-effective, moderately strong, sustainable natural materials and quickly manufacture thermoplastic composites. Recycled biobased cotton fibres collected from the denim industry can effectively penetrate this composite industry due to their cost-effectiveness and desirable physical and mechanical properties. However, retaining structural integrity and enhancing the reinforcing efficiency of recycled yarns in composites pose challenges. Addressing these issues, we propose a new method of extracting recycled cotton from denim waste fabric and transforming it into dry preform with minimal damage to the structural integrity of cotton fibres. Jute fibres have been introduced alongside recycled denim fibers within a polypropylene matrix to optimize the hybrid reinforcing efficacy of the composites. The effect of denim fibre length on composite quasi-static tensile and flexural test results showed that a yarn length of 20 mm yielded the highest tensile strength (⁓27.83 MPa), tensile modulus (⁓ 1.76 GPa), flexural strength (⁓62.35 MPa), and flexural modulus (⁓1.17 GPa). Composites comprising recycled denim yarn and jute fibre improved the tensile modulus to approximately ⁓2.1 GPa and the impact strength to approximately ⁓66.1 kJ/m², following the hybrid rule of mixture, while jute fiber serves to increase the stiffness and toughness of the composites. This work demonstrates that recycled denim cotton fibre and strong jute fibre can be successfully integrated into thermoplastic composites to achieve tailored mechanical properties.</p></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"23 ","pages":"Article 100611"},"PeriodicalIF":0.0,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590048X24000852/pdfft?md5=4437d14f37a5afb8af3738fe89619862&pid=1-s2.0-S2590048X24000852-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141963133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of manufacturing-induced microscopic surface defects on crack initiation and fatigue mechanisms in hot-dip galvanized steel","authors":"Shatumbu Thomas Alweendo ,&nbsp;Motoaki Morita ,&nbsp;Kayo Hasegawa ,&nbsp;Shinichi Motoda","doi":"10.1016/j.rinma.2024.100609","DOIUrl":"10.1016/j.rinma.2024.100609","url":null,"abstract":"<div><p>When designing against fatigue, the surface condition of steel is of utmost importance. Since hot-dip galvanizing is a surface treatment primarily aimed at preventing corrosion, it is critical to assess its influence on the fatigue properties of steel. Given the challenges in producing large structural galvanized steel without imperfections, it is crucial to understand the influence of manufacturing-induced microscopic surface defects on crack initiation and fatigue mechanisms in hot-dip galvanized steel. In this study, to gain such insights, tension-tension fatigue testing was conducted on hot-dip galvanized steel, followed by a detailed analysis of the crack initiation sites to determine any correlation with manufacturing-induced microscopic surface defects. It was observed that under low-cycle fatigue, pre-existing surface defects did not appear to have influenced fatigue mechanisms. However, under high-cycle fatigue, crack initiation sites exhibited evidence of pre-existing manufacturing induced defects which were significantly smaller than the total crack initiation area. This indicates that the defects could not immediately penetrate the substrate but expanded within the layer and only penetrated the substrate after reaching a critical size. Therefore, it is discovered that while manufacturing-induced defects may be challenging to eradicate entirely, those below a threshold size may not immediately evolve into a stable fatigue crack. Hence, if manufacturing induced defects are kept below a critical size, they may not significantly influence the transition of stage I crack into a stable stage II crack.</p></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"23 ","pages":"Article 100609"},"PeriodicalIF":0.0,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590048X24000839/pdfft?md5=ef93dea78670840007b61de3da599c07&pid=1-s2.0-S2590048X24000839-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141962414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrocoagulation process with Fe/Al electrodes to eliminate pollutants from real and synthetic wastewater","authors":"Sarah A.M. Hashem,&nbsp;Ghalia A. Gaber,&nbsp;Walaa A. Hussein,&nbsp;Amal S.I. Ahmed","doi":"10.1016/j.rinma.2024.100606","DOIUrl":"10.1016/j.rinma.2024.100606","url":null,"abstract":"<div><p>This work investigated the effect of a victorious parameter of electrocoagulation (EC) on the removal of turbidity through batch reactor using Fe and Al electrodes. Synthetic (Sol 1, Sol 2) and natural wastewater (Sol 3) with different sodium chloride content were examined under different current densities (CD) and operating time. For the examined solutions conductivity, pH, total suspended solids (TSS) dissolved oxygen (DO) and energy consumption were measured. A novel approach examined the effect of solutions with selected operating parameters on Fe and Al corrosion using chemical and electrochemical tests. Using experimental data collected during the various parameters, a mathematical model of the electrocoagulation process was generated and assessed. FE-SEM images and EDX analyses for Fe and Al electrodes and XRD of coagulant particles, floc, generated by EC were also investigated. According to the findings, the ideal circumstances for the turbidity elimination from the examined solution were found to be as CD = 11 mA/cm², pH ⁓ 7, and operating time = 20 min. Under these optimal circumstances, Al electrodes showed superior efficacy in removing than Fe electrodes for all examined solutions. The turbidity removal efficiency and the energy consumption were also found to be affected by NaCl content. The turbidity removal efficiencies reached their maximum value of 99 % for sol 3 where NaCl content was 3.45 × 10⁻¹ M and energy consumption was 1.667 kWh/m³ by using Al anode.</p></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"23 ","pages":"Article 100606"},"PeriodicalIF":0.0,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590048X24000803/pdfft?md5=d3aa9e0f9243114c7896400f1cf5e0c3&pid=1-s2.0-S2590048X24000803-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141962402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Machine learning based prediction of Young's modulus of stainless steel coated with high entropy alloys","authors":"N. Radhika ,&nbsp;M. Sabarinathan ,&nbsp;S. Ragunath ,&nbsp;Adeolu Adesoji Adediran ,&nbsp;Tien-Chien Jen","doi":"10.1016/j.rinma.2024.100607","DOIUrl":"10.1016/j.rinma.2024.100607","url":null,"abstract":"<div><p>The High Entropy Alloy (HEA) coatings exhibit diverse properties contingent upon their composition and microstructure, addressing current industrial requirements. Machine Learning (ML) regression emerges as a proficient solution for predicting the properties of HEA coatings, offering a significant reduction in experimental work. The ML regressions including Support Vector Regression (SVR), Gaussian Process Regression (GPR), Ridge Regression (RR), and Polynomial Regression (PR), are effectively employed to predict Young's modulus of HEA coated Stainless Steel (SS) through a significant database. The statistical responses of the developed regression models are analyzed through evaluation indices of Coefficient of determination (R²), Mean Absolute Error (MAE), and Root Mean Square Error (RMSE). Among the regression models, the 2-degree PR model stands alone with a high prediction accuracy of R²-0.95, MAE-16.12, and RMSE-21.53. The 2-degree PR model demonstrates a significant correlation between the predicted and experimental Young's modulus, contributing to the accurate prediction of unknown Young's modulus of the HEA-coated SS. The prediction of Young's modulus by the PR model is more reliable, as proved by an error percentile of ±4.76 %, compared to the experimental values of Young's modulus.</p></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"23 ","pages":"Article 100607"},"PeriodicalIF":0.0,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590048X24000815/pdfft?md5=d0b494a6bef9eb04c5265ecb6382a6aa&pid=1-s2.0-S2590048X24000815-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141962403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of a two-stage mixing process on the characteristics of concrete: Part I - Hardened concrete characteristics","authors":"Alexander Teichmann ,&nbsp;Benedikt Strahm ,&nbsp;Harald Garrecht ,&nbsp;Lucio Blandini","doi":"10.1016/j.rinma.2024.100604","DOIUrl":"https://doi.org/10.1016/j.rinma.2024.100604","url":null,"abstract":"<div><p>Mixing is an often overlooked aspect in the concrete production process, yet, it has a major impact on the concrete characteristics. This research investigates how different mixing methods affect the hardened concrete characteristics across four distinct mix designs. A primary objective of the study is to assess the compressive strength of concrete, which serves as a crucial indicator of its structural integrity. This is evaluated at 7, 28, and 56 days of curing. Three distinct experimental testing series were conducted to comprehensively assess the impact of various mixing methods on concrete performance. The findings indicate that higher shear rates during mixing can elevate the development of strength, depending on the type of additives utilized and the specific curing period. Limitations to such improvements were briefly discussed as well. Of particular note is the finding that selecting the optimal mixing method could potentially result in a reduction in cement clinker content while maintaining concrete performance.</p></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"23 ","pages":"Article 100604"},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590048X24000785/pdfft?md5=61ba053991b3f1f3112fbcb03ff65cf8&pid=1-s2.0-S2590048X24000785-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141582603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling of mechanical behavior of Agave sisalana fiber's yarn using the design of experiments method","authors":"Anne-Marie Ndzie Bidima II ,&nbsp;Dydimus Nkemaja Efeze ,&nbsp;Fabien Betene Ebanda ,&nbsp;Timothée Thierry Odi Enyegue ,&nbsp;Remy Legrand Ndoumou Belinga ,&nbsp;Jonas Peequeur Essome Mbang","doi":"10.1016/j.rinma.2024.100605","DOIUrl":"https://doi.org/10.1016/j.rinma.2024.100605","url":null,"abstract":"<div><p>The aim of this study is to propose a model for predicting the mechanical properties of natural sisal yarn based on mechanical strength of used fibers, unit twist of yarn and its density. To achieve this, a complete factorial design modelling method was used, based on a design of experiments approach, which is recommended today because of the ease it offers in taking into account the most complex phenomena. It was developed on the basis of laboratory tests. The model obtained predicts mechanical strength and elasticity modulus of sisal yarn, based on control parameters such as fiber strength, unit twist and yarn mass. This model is currently one of the most accurate tools for predicting and optimising the mechanical properties of sisal yarns. The iso-surface curves represented by this model, can be used to obtain the strength and elasticity modulus of sisal yarn during manufacture, by varying the optimum control parameters. This model is an original tool that can be recommended to the spinning and sisal fiber composite manufacturing industries and others, as it saves time and materials and ensures precision in the manufacture of yarns according to the field of application, thereby contributing to safety in use.</p></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"23 ","pages":"Article 100605"},"PeriodicalIF":0.0,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590048X24000797/pdfft?md5=3370d1c6b27145e30879c2b66ab2a728&pid=1-s2.0-S2590048X24000797-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141606310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Functional and structural modification of polyvinyl alcohol/carbon nanotubes composite fibers","authors":"César A. García-Pérez ,&nbsp;Victor A. González-Dueñas ,&nbsp;Fernando J. Rodríguez-Macías ,&nbsp;Carmina Menchaca-Campos ,&nbsp;O.A. González-Noriega ,&nbsp;Yadira I. Vega-Cantú","doi":"10.1016/j.rinma.2024.100603","DOIUrl":"https://doi.org/10.1016/j.rinma.2024.100603","url":null,"abstract":"<div><p>This research was based on the synthesis of new materials with capacitive properties and low cost, seeking efficient energy storage, through the manufacture and characterization of composite materials of polyvinyl alcohol (PVA)/multiwalled carbon nanotubes with carboxyl group (MWCNTs-COOH) (1 %) for electrodes. Forcespinning and electrospinning techniques were used to develop composite fiber films and compare the physical structure of the fibers and its influence on their capacitive properties. These samples were characterized by SEM, FESEM, FT-IR, XRD, TGA, Raman spectroscopy and electrochemical techniques. The characterization of the composites makes evident the structural modification that the material underwent after the treatments. The electrochemical parameters were measured by electrochemical impedance spectroscopy (EIS), with the samples immersed in H₂SO₄ 1 M as electrolyte. The PVA/MWCNTs-COOH composites with thermal treatment (340 °C) showed a considerable decrease in total impedance of up to 6 orders of magnitude (124 Ω) with respect to the blank sample (2.3 × 10⁸ Ω), as a function of the immersion time in the acid solution. As well as, an increase in the specific capacitance of up to 8 orders of magnitude (1.01×10⁻² F cm⁻²) with respect to the blank sample (5.07 × 10⁻¹⁰ F cm⁻²) for the composite manufactured by the electrospinning technique. The obtaining of fibers with directionality as a result of the forcespinning technique, the highly crossed network observed by electrospinning and the electrochemical properties shown by the structural modification of PVA/MWCNTs-COOH composite, make it, a material with potential technological applications such as electrode in electrochemical capacitors.</p></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"23 ","pages":"Article 100603"},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590048X24000773/pdfft?md5=cd59c00ada957fd46844536c55590317&pid=1-s2.0-S2590048X24000773-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141541379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of cooking oil on the shrinkage-reducing of high-strength concrete","authors":"Yanlin Huo ,&nbsp;Xinhong Dong ,&nbsp;Yang Gao ,&nbsp;Xiaodong Xu ,&nbsp;Liang Zeng ,&nbsp;Yuanchao Wu ,&nbsp;Yunhui Zhao ,&nbsp;Yingzi Yang ,&nbsp;Qunshan Su ,&nbsp;Jinguang Huang ,&nbsp;Dong Lu","doi":"10.1016/j.rinma.2024.100602","DOIUrl":"https://doi.org/10.1016/j.rinma.2024.100602","url":null,"abstract":"<div><p>Autogenous shrinkage is a serious problem for high-strength concrete, which may lead to early-age cracking. Shrinkage-reducing agents are typically used to mitigate the autogenous shrinkage of concrete. However, some negative effects, such as unstable workability and the reduction of compressive strength, will be caused. In this study, emulsified or plain cooking oil is used as a shrinkage-reducing agent in low water-binder ratio concrete. Deformational behaviours of concrete with cooking oil and normal commercially available shrinkage-reducing agent are investigated. Experimental results show that the utilization of cooking oil could significantly reduce the autogenous shrinkage of high-strength concrete due to the reduction of surface tension. Additionally, emulsified cooking oil is better than normal shrinkage-reducing agents and plain cooking oil in many aspects of the concrete. Micro-structure of the concrete with different shrinkage-reducing agents is also observed. Emulsified cooking oil is considered a promising admixture for the mitigation of autogenous shrinkage of high-strength concrete.</p></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"23 ","pages":"Article 100602"},"PeriodicalIF":0.0,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590048X24000761/pdfft?md5=f58e172d9f58514a321c85eb5f3af136&pid=1-s2.0-S2590048X24000761-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141482681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of green biocomposites based on polyvinyl alcohol and grafted biopolymer tamarind kernel powder with polyacrylic acid","authors":"Mohammad Musfiqur Rahman ,&nbsp;Shahin Sultana ,&nbsp;Zahidul Islam ,&nbsp;Md. Khabir Uddin Sarker ,&nbsp;Md. Ershad Halim ,&nbsp;Md Aftab Ali Shaikh","doi":"10.1016/j.rinma.2024.100601","DOIUrl":"https://doi.org/10.1016/j.rinma.2024.100601","url":null,"abstract":"<div><p>This investigation focuses on the development and assessment of biopolymer-based green biocomposite materials that contain tamarind seed kernel powder (TKP) either in its raw or polyacrylic acid (PAA) grafted form as the reinforcing component, combined with polyvinyl alcohol (PVA) as the matrix material. The goal is to develop biopolymer TKP based green biocomposites with a biodegradable PVA matrix for food grade packaging and biomedical applications. Both raw TKP reinforced PVA and PAA grafted TKP reinforced PVA, two forms of sustainable green biocomposites, were developed. Compression molding was used to combine various raw or PAA grafted TKP loadings with PVA to produce various biocomposites. The loadings were 0 %, 0.25 %, 0.5 %, 1 %, 5 %, and 10 % in weight. To confirm the PAA grafted TKP, attenuated total reflection-fourier transform infrared (ATR-FTIR) spectrum analysis was employed. The mechanical properties of the biocomposites were examined, and it was discovered that the grafted biocomposites exhibited 4 % higher tensile strength and elongation at break (%) on average than the raw TKP reinforced PVA biocomposites. The Charpy impact strength of the biocomposites exhibited an average 28 % improvement in impact resistance with modified TKP and an 8 % increase with raw TKP when compared to pure PVA sheets. Additionally, the PAA-grafted TKP reinforced PVA biocomposites outperformed the raw TKP reinforced PVA biocomposites in water absorption tests, exhibiting an average improvement in moisture resistance of nearly 13 %. Scanning electron microscopy (SEM) tests revealed that the PAA-grafted biocomposites had a more uniform dispersion of fillers inside the PVA matrix as compared to the raw TKP/PVA biocomposites. These findings enable in the development of high-performance, environmentally friendly and green biocomposite materials for a variety of uses.</p></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"23 ","pages":"Article 100601"},"PeriodicalIF":0.0,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590048X2400075X/pdfft?md5=06488c04738a2d8b472b020a9b6e8577&pid=1-s2.0-S2590048X2400075X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141485779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing the mechanical performance of natural fiber thermoplastic composite sandwiches for advanced applications","authors":"Priyanka Ravishankar ,&nbsp;Mina Arya ,&nbsp;Hom Dhakal ,&nbsp;Fathi Gouda ,&nbsp;Mikael Skrifvars ,&nbsp;Pooria Khalili","doi":"10.1016/j.rinma.2024.100600","DOIUrl":"https://doi.org/10.1016/j.rinma.2024.100600","url":null,"abstract":"<div><p>Green composites, renowned for their biodegradable and recyclable attributes, have recently gained substantial prominence. Their sustainability, eco-friendliness, and lightweight characteristics position them as a compelling alternative to conventional plastic-based materials. This study delves into the mechanical performance, encompassing tensile, flexural, and Charpy impact test properties, of jute and flax thermoplastic composite laminates. Additionally, it explores the flexural behavior of sandwich composites reinforced with jute and flax fabrics individually. To accomplish this, we manufactured various composite laminates, including jute/PP, flax/PP (64.2 % fiber mass fraction), flax/PP (45.0 % fiber mass fraction), and plasma-treated flax/PP (PTF/PP) composite laminates using compression molding techniques. We also crafted sandwich composites by integrating flax and jute natural fabrics as reinforcements into a polypropylene (PP) matrix for the sandwich surface layer, along with recycled polyethylene terephthalate (PET) foam as the core material. This allowed for a comprehensive comparative analysis of their functional properties. In addition to mechanical testing, the differential scanning calorimetry (DSC) analysis was conducted on various composite laminates to evaluate the crystallinity levels and melting behavior of PP within these diverse formulations. Further characterizations included Fourier transform infrared (FTIR) spectroscopy and digital imaging analysis. Our experimental results unequivocally demonstrated the superior performance of Flax/PP composite laminates over Jute/PP composite laminates in terms of flexural, tensile, and impact properties. In the context of sandwich composites, Flax/PP/PET foam exhibited the highest force resistance, along with superior bending strength and modulus when compared to Jute/PP/PET foam. Notably, Jute/PP/PET foam displayed a higher incidence of delamination and breakage. Interestingly, both sandwich composites demonstrated nearly identical properties in the impact test. Furthermore, plasma treatment of flax composite laminates had a beneficial effect on specific mechanical properties, leading to an 8.6 % enhancement in flexural strength (54.09 MPa) compared to the performance of flax/PP (45.0 % fiber mass fraction) laminate.</p></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"23 ","pages":"Article 100600"},"PeriodicalIF":0.0,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590048X24000748/pdfft?md5=1a8b55d6cf048f31060ccff76bb41c31&pid=1-s2.0-S2590048X24000748-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141485774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}