Application of an Eco-Friendly Adhesive and Electrochemical Nanostructuring for Joining of Aluminum A1050 Plates

Papanicolaou, George; Kontaxis, Lykourgos C.; Kouris, Nikolaos; Portan, D. V.

doi:10.3390/ma16062428

Cited by 4 publications

(3 citation statements)

References 44 publications

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“…CF‐OP‐CF mixed modulus joints achieved a significant further increase in shear strength (+37.11% compared to the EP‐EP‐EP mixed‐modulus configuration, or + 33.27% compared to the neat matrix single lap joint). This is in agreement with previous data published by this author or others 33–36,53,54 …”

Section: Resultssupporting

confidence: 94%

“…This is in agreement with previous data published by this author or others. [33][34][35][36]53,54 The use of the NT-coated adherends resulted in dramatically improved cohesion between the adherend and the adhesive, which further resulted in a shear strength of 9.56 MPa in the case of 12% Cotton cloth/MASTEP and 10.61 MPa in the case of 12% Cotton flocks/ MASTEP. Alumina NT-coating of the adherends resulted in a large increase in shear strength for cotton flocksreinforced MASTEP (+84.91%) and for cotton fabricreinforced MASTEP (+102.1%), apparently due to an increase in the adhesive-to-adherend cohesion.…”

Section: Further Considerationsmentioning

confidence: 99%

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Assessing the potential of Chios natural mastic for the production of sustainable epoxy composite adhesives

Anastasiou

2023

J of Applied Polymer Sci

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The self‐curable epoxidized polymeric fraction of the natural gum “Chios mastic” (Pistacia lentiscus L.) gum is used as a matrix to produce sustainable particulate composite adhesives and further to manufacture lap joints. Olive pit powder and cotton flocks are used as reinforcements, each for a range of contents. Mixed‐modulus‐joint and Nanotube‐coated‐adherend special manufacturing techniques are also applied to further improve shear properties, reduce shear stress concentrations, or increase the adhesive and the adherend cohesion. 2% (w/w) Aluminum and 2% (w/w) olive pit reinforcements achieve an increase in shear strength of 14.19% and 12.26%, respectively, while cotton flocks‐ initially of lower performance as well as pieces of cotton fabric, are used to make joints according to the Nanotube‐coated‐adherend technique achieving an increase in shear strength of 102.1% and 84.91%, respectively. The obtained experimental results demonstrate the potential of the epoxidized polymer fraction of Chios natural mastic to produce useful sustainable particulate epoxy composite adhesives and double‐sided adhesive tapes.

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Section: Resultssupporting

confidence: 94%

Section: Further Considerationsmentioning

confidence: 99%

Assessing the potential of Chios natural mastic for the production of sustainable epoxy composite adhesives

Anastasiou

2023

J of Applied Polymer Sci

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“…They are extracted from the stems of the flax plant and are known for their robustness, rigidity, and longevity, making them an excellent option where weight reduction and toughness are significant factors. Furthermore, flax fibers are a sustainable and biodegradable option, making them a compelling substitute for synthetic fibers [17].…”

Section: Introductionmentioning

confidence: 99%

Machine Learning-Assisted Tensile Modulus Prediction for Flax Fiber/Shape Memory Epoxy Hygromorph Composites

Sadat

2023

Applied Mechanics

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Flax fiber/shape memory epoxy hygromorph composites are a promising area of research in the field of biocomposites. This paper focuses on the tensile modulus of these composites and investigates how it is affected by factors such as fiber orientation (0° and 90°), temperature (20 °C, 40 °C, 60 °C, 80 °C, and 100 °C), and humidity (50% and fully immersed) conditions. Machine learning algorithms were utilized to predict the tensile modulus based on non-linearly dependent initial variables. Both decision tree (DT) and random forest (RF) algorithms were employed to analyze the data, and the results showed high coefficient of determination R2 values of 0.94 and 0.95, respectively. These findings demonstrate the effectiveness of machine learning in analyzing large datasets of mechanical properties in biocomposites. Moreover, the study revealed that the orientation of the flax fibers had the greatest impact on the tensile modulus value (with feature importance of 0.598 and 0.605 for the DT and RF models, respectively), indicating that it is a crucial factor to consider when designing these materials.

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Eco‐friendly enhancement of mechanical properties in 3D carbon felt reinforced epoxy/aluminum sandwich composites via NaCl‐based anodizing and triton X‐100 modification

Taieh,

Fahad

2024

Polymer Composites

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To address the challenges of achieving strong adhesion between aluminum face sheets and composite cores (3D carbon felts) in sandwich structures, this work presents a novel approach that prioritizes safety, environmental sustainability, and ease of processing. The 3D CFs/Epoxy core was modified with Triton X‐100 in amounts from 0 to 10 wt% of the epoxy resin. The aluminum alloy face sheets were anodized at voltages from 0 to 11 V, using a NaCl‐based anodizing process. The technique of anodizing can enhance the bond between the aluminum face sheets and the 3D CFs/epoxy core, resulting in improved mechanical performance of the composite, including flexural and compressive testing, as well as dynamic mechanical analysis. The composite, embedding 3D CFs foam in epoxy resin, has a storage modulus 65.1% higher than pure epoxy at 2070 MPa. In addition, increasing Triton X‐100 content (1–10 wt%) decreases the storage modulus from 1886 to 1314 MPa and the glass transition temperature from 68.3 to 62.8 °C. Additionally, with Triton X‐100 concentrations of 1 to 10 wt%, the flexural modulus of the epoxy reinforced by 3D CFs drops from 3951.8 to 2400 MPa, and the flexural strength decreases by 55.3% from 174 to 112 MPa, indicating reduced structural rigidity. For sandwich composites with anodized aluminum face sheets, a 7 V anodizing voltage boosts the flexural modulus from 17.8 GPa (0 V) to 36.2 GPa. At 7 V, compressive strength and strain rise by 346.9% and 995.5%, respectively. Flexural toughness peaks at 11239 KJ/m3 with 5 wt% Triton X‐100.Highlights Developed new sandwich epoxy composites consisting of anodized aluminum sheet treated with NaCl and modified 3D carbon felts epoxy composites using Triton X‐100. Aluminum face sheets underwent an anodization at different voltages (0, 5, 7, 9, and 11 volts), aiming to enhance the bonding between the aluminum sheets and the 3D CFs/epoxy core. Triton X‐100 was utilized to modify the epoxy matrix at various concentrations (0 to 10 wt%) for improving the flexibility of the sandwich core. The sandwich composites incorporating the un‐anodized face sheet have shown flexural modulus of about 17.8 GPa. The modulus achieves its maximum value of 36.2 GPa when anodized at 7 V, indicating a 103% increase. The flexural strength of sandwich composites increases by 13% (272 MPa) when the Triton X‐100 concentration is raised to 5 wt%, compared to the 240 MPa flexural strength of the Al face sheet anodized at 7 V.

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Application of an Eco-Friendly Adhesive and Electrochemical Nanostructuring for Joining of Aluminum A1050 Plates

Cited by 4 publications

References 44 publications

Assessing the potential of Chios natural mastic for the production of sustainable epoxy composite adhesives

Assessing the potential of Chios natural mastic for the production of sustainable epoxy composite adhesives

Machine Learning-Assisted Tensile Modulus Prediction for Flax Fiber/Shape Memory Epoxy Hygromorph Composites

Eco‐friendly enhancement of mechanical properties in 3D carbon felt reinforced epoxy/aluminum sandwich composites via NaCl‐based anodizing and triton X‐100 modification

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