The effect of hygrothermal aging on the adhesion performance of nanomaterial reinforced aluminium adhesive joints

Ceylan, Reyhan; Ozun, Elanur; Çoban, Onur; Bora, Mustafa Özgür; Kutluk, Togayhan

doi:10.1016/j.ijadhadh.2022.103304

Cited by 16 publications

(7 citation statements)

References 46 publications

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“…Nanocomposite adhesives based on specialty thermoplastic matrices, such as polyaryletherketone (PAEK), polyetheretherketone (PEEK), and polyetherketoneketone (PEKK), etc., are gaining a lot of attention [8][9][10][11][12]. Various NPs such as MWCNTs [13], Silicon carbide (SiC) [14,15], Boron Nitride (BN) [10,16,17], Titanium Carbide (TiC) [12], etc., have been recently successfully tried in combination with thermoplastics. In our recent work on exploring the potential of MWCNTs in various amounts in PAEK [11], a 152% improvement in LSS was due to significant bulk strengthening (increased tensile strength) and chemical functionality.…”

Section: Introductionmentioning

confidence: 99%

Sandwich-structured nano-adhesive based on the synergistic action of two nanoparticles (SiC and MWCNTs)

Marathe,

Bijwe

2024

Surf. Topogr.: Metrol. Prop.

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This study encompasses the development of sandwich-structured adhesive reporting the synergism in the functioning of two kinds of nanoparticles (NPs)-SiC (Silicon carbide) and MWCNTs (multiwalled carbon nanotubes). Two adhesives using MWCNTs and NPs of SiC in selected amounts were developed using Polyaryletherketone (PAEK) thermoplastic polymer as a base matrix. Fabricated joints using these adhesives were characterized for dispersion of NPs, lap shear strength (LSS), and failure modes. Based on the data on the LSS, the pros and cons of using individual NPs were analyzed, and the third adhesive was designed in a sandwich manner, where positive points of both the NPs were expected to work synergistically. The sandwich adhesive showed higher LSS than the individual ones. It was concluded that the strengthening mechanism of MWCNTs of bulk polymer in the central portion was beneficial. The two outer layers of SiC NPs in PEAK interacting with the two steel surfaces of coupons proved helpful in increasing friction and, hence, synergistically increasing the LSS of sandwich adhesive.

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Section: Introductionmentioning

confidence: 99%

Sandwich-structured nano-adhesive based on the synergistic action of two nanoparticles (SiC and MWCNTs)

Marathe,

Bijwe

2024

Surf. Topogr.: Metrol. Prop.

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“…Due to this interaction, shear, peel, flexural strength, and stiffness of the SLJ are increasing. 23,24 The incorporation of adhesive GNP up to a particular limit (0.5 wt.%) leads to an increase in the joint capacity, shear strength, and flexural strength. The enhanced energy absorption capacity and interfacial bonding between the epoxy molecules, GNP, and adherend attribute to this increase in joint capacity, shear strength, and flexural strength.…”

Section: Introductionmentioning

confidence: 99%

“…36 Based on a detailed analysis of the existing literature, it is evident that the enhancement of toughness and strength in adhesives holds significant importance. Numerous scholars [23][24][25][26][27][28][29][30][31][32][33][34][35] have proposed the use of microand nano-fillers as a strategy to improve the mechanical characteristics of adhesives. After conducting an analysis of the relevant literature, we found that the co-curing SLJ fabrication process with unidirectional glass fiber and adhesive incorporated various (0.25, 0.5, 0.75, 1.0, 1.25, and 1.5) weight percentages of GNP that had not before been investigated.…”

Section: Introductionmentioning

confidence: 99%

“…The different percentages of reinforcement nanoparticles and combinations of nanoparticles used in similar and dissimilar SLJs increase interfacial bonding between the adherend and adhesive. Due to this interaction, shear, peel, flexural strength, and stiffness of the SLJ are increasing 23,24 . The incorporation of adhesive GNP up to a particular limit (0.5 wt.%) leads to an increase in the joint capacity, shear strength, and flexural strength.…”

Section: Introductionmentioning

confidence: 99%

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Enhancing shear and flexural strength of single lap composite joints with a graphene nanoparticle‐reinforced adhesive through a co‐curing technique

Venugopal,

Sudhagar P

2023

Polymer Composites

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Adhesive‐bonded joints in glass fiber‐reinforced polymer (GFRP) composite structures give numerous benefits, such as greater flexibility, good specific strength, improved fatigue resistance, and the ability to reduce stress concentration. Consequently, adhesive‐bonded joints are considered more influential if compared to fasteners. This research investigates the effects of incorporating graphene nanoparticles (GNPs) into the adhesive layer on several aspects of adhesively bonded co‐cure (CC) single‐lap GFRP composite joints. These aspects include shear strength, flexural strength, failure mechanisms, and fractography studies. The study examined six distinct weight percentages of GNP, specifically 0.25, 0.50, 0.75, 1.0, 1.25, and 1.5 wt.%, which are considered to enhance the interfacial strength of adhesive joints. Based on the research, 0.75 wt.% of GNP single‐lap joint (SLJ) shear strength improved by 69.40% when compared to the plain matrix SLJ. This suggests excellent load transmission between adherends. In addition, the flexural strength increased by 46.57% in the specimens containing 1.25 wt.% GNP when compared to the plain matrix used to bond in SLJ. After testing, fractured specimen microscopic images were used to examine failure mechanisms. According to fractography studies, adding GNPs to the adhesive causes surfaces to become rougher, which improves the adhesion between the adhesive and the adherends.Highlights Six distinct wt.% of GNPs were used to prepare the matrix by sonication. Single‐lap GFRP composite joints were fabricated through a CC technique. SLJ's maximum shear strength was found at 0.75 wt% of GNP. SLJ's maximum flexural strength was found at 1.25 wt% of GNP. Failure analysis was conducted using microscopes and FESEM images.

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“…When the ageing environment was coupled with load, the ageing environment played a major role, and load accelerated the ageing rate but did not change the degradation trend caused by the ageing environment. Reyhan Ceylan et al [23] investigated and compared the single-lap bonding joints of AA7075-T6 aluminium adherends bonded with non-reinforced as well as epoxy adhesives reinforced with different nanomaterials BNNP (Boron Nitride Nanopowder), ANP (Aluminium Oxide Nanopowder), and MWCNT (Multi-Walled Carbon Nanotubes) after exposing them to 60 • C/100% RH for 1, 2, 4, and 6 weeks. The results show that the shear strength decreases under the influence of hygrothermal ageing due to oxidation occurring as a result of water molecules entering the bonding region and that the nanomaterials reinforced bonded joints have a higher shear strength as compared to the non-reinforced bonded joints.…”

Section: Introductionmentioning

confidence: 99%

Failure Study of BFRP Joints with Two Epoxy Adhesives under Hygrothermal Coupling

Niu,

Yang,

Lin

et al. 2023

Polymers

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Basalt Fibre Reinforced Polymer (BFRP)-bonded structures are lightweight, high strength, economical, and environmentally friendly, which is very advantageous in the civil sector. The aim of this paper is to provide a comprehensive account of the hygrothermal degradation and failure mechanisms of BFRP-bonded structures by comparing the residual properties of two epoxy adhesive BFRP single-lap joints after ageing for 240 h, 480 h, and 720 h in an extreme hygrothermal environment with pure water at 80 °C. The hydrophilicity and thermal stability of the two adhesives were firstly compared by water absorption and Thermogravimetric Analysis (TGA) tests, and the hygrothermal degradation of the molecular chains and the reduction in Tg were characterised by Fourier Transform Infra-Red (FTIR) spectroscopy and Differential Scanning Calorimetry (DSC) curves. The failure strength and load-displacement curves of the two joints were then compared, and it was found that the strength and stiffness had different trends, while the paired t-test was used to demonstrate the correlation between the failure strength and the adhesive Tg, as well as the difference in the failure mechanisms of the two joints caused by the water absorption rate. The analysis of macrosections and Scanning Electron Microscope (SEM) images summarised the process and reasons for the transition of the failure mode from fibre tearing to hybrid failure, and finally, the changes in elemental concentration and O/C values were analysed by Energy Dispersive X-ray Analysis (EDX), which proved that the degree of hydrolysis could not be used as a judgement of the degradation degree of the joint alone, and provided data support for the application of the BFRP-bonded structure in the humid and hot environment.

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The effect of hygrothermal aging on the adhesion performance of nanomaterial reinforced aluminium adhesive joints

Cited by 16 publications

References 46 publications

Sandwich-structured nano-adhesive based on the synergistic action of two nanoparticles (SiC and MWCNTs)

Sandwich-structured nano-adhesive based on the synergistic action of two nanoparticles (SiC and MWCNTs)

Enhancing shear and flexural strength of single lap composite joints with a graphene nanoparticle‐reinforced adhesive through a co‐curing technique

Failure Study of BFRP Joints with Two Epoxy Adhesives under Hygrothermal Coupling

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