Research of hybrid adhesive bonds with filler based on coffee bean powder exposed to cyclic loading

Müller, Miroslav; Tichý, Martin; Šleger, Vladimír; Hromasová, Monika; Kolář, Viktor

doi:10.21062/mft.2020.080

Cited by 5 publications

(2 citation statements)

References 32 publications

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“…Adhesive materials are very diverse since they are made of plastic and rubber material groups [3]. Moreover, due to the combinations of the properties and amount of organic and inorganic additives in nano or micron size that can be added into additives, the types of new composite adhesives and their application areas are constantly increasing [4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Organic Fillers on the Mechanical Strength of the Joint in the Adhesive Bonding

Anaç

Doğan

2023

Processes

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The most important advantages of adding additives to adhesives are increasing the bonding strength and reducing the adhesive cost. The desire to reduce costs as well as the need for environmentally friendly and health-friendly products have paved the way for the recycling of waste materials and the use of cheaper natural materials as additives. In this study, mussel, olive pomace, and walnut powders in different ratios (5%, 15%, and 30% by weight) and in different sizes (38 and 45 µm) were added to an epoxy adhesive. The steel materials were joined in the form of single-lap joints by using the obtained adhesives with additives. These joints were subjected to the tensile test and the strengths of these joints were examined. SEM images of the bonding interface were taken, and the distribution of the powders was examined. When the powder size was 45 µm, bond strengths increased in all additive ratios compared to the pure adhesive, while for 38 µm powders, the strength value increased only at the 5% additive ratio. In joints with 45 µm powder additives, the strength increased by up to 38% compared to the pure adhesive, while this rate was determined as 31% for 38 µm.

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Section: Introductionmentioning

confidence: 99%

The Effect of Organic Fillers on the Mechanical Strength of the Joint in the Adhesive Bonding

Anaç

Doğan

2023

Processes

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“…Research results show that when adding used coffee grounds to epoxy resin, some mechanical properties are slightly reduced but not much, and some other mechanical properties are also significantly improved. Coffee grounds can be said as the best material for composites [8,9]. Suaduang et al studied the inclusion of coffee grounds in polylactic acid at the concentrations of 5 wt.%, 7.5 wt.%, and 10 wt.%.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Biocomposites Based on Used Coffee Grounds and Epoxy Resin: Mechanical Properties and Fire Resistance

Nguyen

2021

International Journal of Chemical Engineering

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Studies on using biomaterials hybridized with other materials to produce biomaterials have been paid more attention due to their low cost, abundance, renewability, and degradability. Therefore, these materials are ecofriendly and nontoxic to humans. A large number of used coffee grounds (SCGs) are often discarded and replacements are necessary for dealing with environmental problems. This work developed sustainable materials by reusing SCGs. Used coffee grounds were mixed with epoxy resin at different amounts: 30 wt %, 40 wt %, 50 wt %, and 60 wt %. SCGs were treated with 0.5 N NaOH, at SCGs/NaOH ratio of 1 : 2. SEM images showed that the material with 30 wt % SCGs has good compatibility without phase division on the SCGs-epoxy interface. Results of mechanical properties of epoxy composites with 30 wt % SCGs are as follows: tensile strength of 44.81 ± 10 MPa, flexural strength of 80.07 ± 0.16 MPa, compressive strength of 112.56 ± 0.11 MPa, and Izod strength and impact of 8.21 ± 0.19 kJ/m2. In terms of flame-retardant properties, the oxygen index is limited to 20.8% ± 0.20 and the burning rate according to UL94HB is 27.02 ± 0.29 mm/min. The obtained results indicate that it is possible to produce biohybrid composites from epoxy resin and SCGs. This work offers an ecofriendly alternative method to use the waste of the coffee industry. It contributes to improvements of the general characteristics of composites such as mechanical, thermal, and flame-retardant properties. This work proved that SCGs have a high potential to be used in a wide range of composite materials for civil engineering applications.

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Preparation of (epoxy/coffee fibers) composites as natural gelcoat with high mechanical properties

Lutfi¹,

Jassim²

2023

TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES22Fr

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Research of hybrid adhesive bonds with filler based on coffee bean powder exposed to cyclic loading

Cited by 5 publications

References 32 publications

The Effect of Organic Fillers on the Mechanical Strength of the Joint in the Adhesive Bonding

The Effect of Organic Fillers on the Mechanical Strength of the Joint in the Adhesive Bonding

Hybrid Biocomposites Based on Used Coffee Grounds and Epoxy Resin: Mechanical Properties and Fire Resistance

Preparation of (epoxy/coffee fibers) composites as natural gelcoat with high mechanical properties

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