Moritz Wahl , Patrik Doraciak , Lea Römling , Thomas Scheffler , Thomas Lampke , Frank Henning
{"title":"Monitoring laser cleaning for enhanced adhesion of FIPG silicone adhesive in automotive industry","authors":"Moritz Wahl , Patrik Doraciak , Lea Römling , Thomas Scheffler , Thomas Lampke , Frank Henning","doi":"10.1016/j.ijadhadh.2025.103938","DOIUrl":"10.1016/j.ijadhadh.2025.103938","url":null,"abstract":"<div><div>Adhesive bonding and sealing of safety-relevant bonding joints in the automotive industry requires automatable monitoring of cleaning processes to reproducibly ensure clean adherend surfaces and finally sufficient adhesion. The industry lacks combined experimental data that include the cleaning of precisely contaminated surfaces, the monitoring thereof and the subsequent adhesive bonding to design these production processes holistically. Therefore, this study investigates laser-induced fluorescence (LIF) and laser-induced breakdown spectroscopy (LIBS) as inline-capable monitoring methods for laser cleaning of aluminium specimens contaminated with cooling lubricant by varying the contamination grammage and the laser cleaning power density. The results of the methods are validated with measurements using a Fourier transform infrared spectroscopy with an attenuated total reflectance unit (FTIR-ATR). Additionally, the adhesion properties of a model room temperature vulcanised (RTV) silicone adhesive are evaluated using lap shear tests. This adhesive is characteristically used as a formed-in-place gasket (FIPG) for sealing applications.</div><div>The results show a complete and consistent picture of the interaction of all applied analytical methods. LIF, LIBS and FTIR-ATR are able to detect contaminations between 0.15 and 2.0 g m<sup>−2</sup>. Subsequently, they determine a laser power density onset threshold for laser cleaning of a 2.0 g m<sup>−2</sup> contaminated specimen, which was verified in lap shear analysis. The fracture patterns show decreasing cohesive failure with increasing contamination grammage, which increases after laser cleaning with a laser power density above the determined threshold.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"138 ","pages":"Article 103938"},"PeriodicalIF":3.2,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Óscar Cuadrado-Sempere , Francisco-Javier Simón-Portillo , Carlos Ruzafa-Silvestre , Elena Orgiles-Calpena , Francisca Arán-Aís , Lucas Filipe Martins da Silva , Miguel Sánchez-Lozano
{"title":"Enhanced adhesion properties of hyperelastic adhesives to different nature substrates by applying different surface treatments","authors":"Óscar Cuadrado-Sempere , Francisco-Javier Simón-Portillo , Carlos Ruzafa-Silvestre , Elena Orgiles-Calpena , Francisca Arán-Aís , Lucas Filipe Martins da Silva , Miguel Sánchez-Lozano","doi":"10.1016/j.ijadhadh.2025.103934","DOIUrl":"10.1016/j.ijadhadh.2025.103934","url":null,"abstract":"<div><div>This study investigates the effect of different surface treatments on the bond strength of hyperelastic adhesive joints. Plasma treatment and primer application were compared to sandblasting and sandblasting plus priming on aluminium and Glass-fibre Reinforced Polyester (GRP) surfaces. Results indicated that plasma treatment on aluminium surfaces increased shear strength values by 20 % compared to untreated surfaces and showed a shear strength comparable to primer application. However, on GRP surfaces, primer application improved bond strength by 10 %, while plasma treatment did not provide any significant enhancement. Plasma and primer treatments produce predominantly cohesive joint failure, while sandblasting and sandblasting plus priming produce large percentage of adhesive failure. Plasma treatment may serve as a good alternative to primer on aluminium surfaces, while primer remains preferred for GRP surfaces. The study concludes that the dispersive contact angle has a direct relationship with shear strength, where a 50 % decrease in dispersive contact angle results in a 10 % increase in shear strength. This suggests that substrate surfaces with a higher affinity for dispersive compounds would form stronger bonds.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"138 ","pages":"Article 103934"},"PeriodicalIF":3.2,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shuhui Zhang , Zhebin Wu , Xiaodan Tang , Qihua Ma , Weiwen Cai , Xuehui Gan
{"title":"Research on the mechanical properties of CFRP-Al adhesively bonded structures in hygrothermal environments","authors":"Shuhui Zhang , Zhebin Wu , Xiaodan Tang , Qihua Ma , Weiwen Cai , Xuehui Gan","doi":"10.1016/j.ijadhadh.2025.103939","DOIUrl":"10.1016/j.ijadhadh.2025.103939","url":null,"abstract":"<div><div>Adhesive structures can provide connection strength without damaging the material and are important for connecting heterogeneous materials. This paper investigates the effects of different bonding parameters and hygrothermal environments on the mechanical properties and failure modes of CFRP-Al adhesively bonded structures. The results of the experiment indicate that the water absorption rate is directly proportional to the temperature of the water bath. Additionally, the ultimate tensile load of the samples decreased by 8.99 %, 22.58 %, and 42.97 % after being subjected to water baths at 25 °C, 50 °C, and 80 °C, respectively. This paper predicts the mechanical properties of CFRP-Al adhesive structures in hygrothermal environments using UMAT and USDFLD subroutines in ABAQUS finite element software. The accuracy of the simulation model is verified through comparison with experiments. On this basis, the effects of various bonding parameters (bonding length, thickness, width, and lay-up angle) on the mechanical properties and failure modes of CFRP-Al adhesively bonded structures in hygrothermal environments are studied, providing valuable insights for the design of dissimilar material joining techniques in complex environments.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"138 ","pages":"Article 103939"},"PeriodicalIF":3.2,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of manufacturing parameters and environmental factors on the mechanical behavior of AA5052-H36 adhesively bonded overlap joints","authors":"Marzieh Nodeh , Ahmed Maslouhi , Alain Desrochers","doi":"10.1016/j.ijadhadh.2025.103940","DOIUrl":"10.1016/j.ijadhadh.2025.103940","url":null,"abstract":"<div><div>This study investigated the joint resistance and fatigue behavior of single-lap Al 5052-H36 adhesively bonded joints. The main objective is to study the effect of factors related to the production of adhesively bonded joints and the effect of environmental factors on mechanical performance of the joint. The effect of silane abrasion as a surface treatment and adhesive curing condition were studied as the factors related to the production line. Two different degradation conditions named Cataplasma degraded, and apparent saturation conditions were investigated to evaluate the mechanical behavior of joints after degradation. Cataplasma as an accelerated aging condition is a combination of moisture coupled with high and low temperatures. Apparent saturation condition related to samples immersed at 70 C tap water to reach their moisture equilibrium status. The results demonstrate surface treatment improved fatigue life by 80 % and this improvement will be more considerable when structures are imposed to environmental degradation conditions. Curing bonded joints at room temperature increased their fatigue life by 68 % compared to poorly cured ones at −20 C. Although both environmental conditions reduced the fatigue life, however, this reduction was more severe for apparent saturation samples and the fatigue life decreased by 79 %.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"138 ","pages":"Article 103940"},"PeriodicalIF":3.2,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Syaza Syaqqira Abdul Muhaimin , Nur Izzaati Saharudin , Abdul Fattah Nongman , Norhafizah Saari
{"title":"Characterization of bamboo particleboard bonded with Nelumbo nucifera seed starch-citric acid-based adhesive","authors":"Syaza Syaqqira Abdul Muhaimin , Nur Izzaati Saharudin , Abdul Fattah Nongman , Norhafizah Saari","doi":"10.1016/j.ijadhadh.2025.103937","DOIUrl":"10.1016/j.ijadhadh.2025.103937","url":null,"abstract":"<div><div>This study evaluates bio-based <em>Nelumbo nucifera</em> starch-citric acid adhesives as sustainable alternatives to urea-formaldehyde for bamboo particleboard fabrication. Particleboards were produced using Semantan bamboo (<em>Gigantochloa scortechinii</em>) particles with three adhesive formulations: BPS100 (100 % starch), BPS75 (75 % starch, 25 % citric acid), and BPS50 (50 % starch, 50 % citric acid), targeting a density of 0.80 g/cm³ according to ASTM D1037 standards. Physical properties, including thickness swelling and water absorption, were assessed alongside mechanical properties such as modulus of rupture (MOR) and internal bond (IB) strength. The BPS50 formulation exhibited the lowest thickness swelling (76.85 %) and water absorption (134.5 %), as well as the highest MOR (5.448 MPa) and IB strength (0.372 MPa), outperforming both BPS75 and BPS100. However, the MOR value remains below the minimum required standard for general purposed particleboard, indicating the need for further development. FTIR analysis confirmed the formation of ester linkages between starch and citric acid, with enhanced carbonyl signals correlating with improved properties. While these findings highlight the potential of starch-citric acid adhesives as renewable, formaldehyde-free bio-adhesives for lignocellulosic particleboard composites, further optimization is necessary to meet industrial performance standards.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"138 ","pages":"Article 103937"},"PeriodicalIF":3.2,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The effect of rGO/SiO2 hybrid filler on Lap shear strength of Polyurethane adhesive having Poly (dimethyl siloxane) (PDMS)","authors":"Ganesh Yadav , Kavita Agarwal , Sunil Kumar Gupta","doi":"10.1016/j.ijadhadh.2025.103942","DOIUrl":"10.1016/j.ijadhadh.2025.103942","url":null,"abstract":"<div><div>The Polyurethane (PU) nanocomposite adhesive having Polydimethylsiloxane (PDMS) with 0.25 wt%, 0.50 wt%, and 1.0 wt% of reduced Graphene Oxide (rGO)/Silica (SiO<sub>2</sub>) as hybrid nanofillers was prepared using in situ polymerisation method. The morphology, phase separation, and thermal stability of the PU-PDMS nanocomposite adhesive with these fillers were analysed by FESEM (Field emission scanning electron microscopy), XRD (X-ray Diffractometer), and TGA (Thermogravimetric analysis), respectively. The functional group present in the PU-PDMS nanocomposite adhesive with rGO/SiO<sub>2</sub> hybrid nanofillers was determined by FTIR (Fourier transform infrared). The effect of the concentration of rGO/SiO<sub>2</sub> hybrid nanofillers in PU-PDMS neat adhesive on the shear strength of single lap aluminium adherends joints was examined. The thermal stability and lap shear strength were increased as the concentration of the rGO/SiO<sub>2</sub> hybrid nanofillers in the PU-PDMS adhesive increased up to 1.0 wt%. The ideal thickness of the adhesive layer for the neat PU-PDMS adhesive in lap shear joints was determined to be 0.5 mm. The shear strength of PU-PDMS nanocomposite adhesive with 1.0 wt% of rGO/SiO<sub>2</sub> hybrid filler was 249 % more than the neat PU-PDMS adhesives.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"138 ","pages":"Article 103942"},"PeriodicalIF":3.2,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rutu Patel , Mayankkumar L. Chaudhary , Smit Chaudhary , Ram K. Gupta
{"title":"Effect of distinct molecular structure of diols on the properties of bio-based wood adhesive","authors":"Rutu Patel , Mayankkumar L. Chaudhary , Smit Chaudhary , Ram K. Gupta","doi":"10.1016/j.ijadhadh.2025.103936","DOIUrl":"10.1016/j.ijadhadh.2025.103936","url":null,"abstract":"<div><div>This study aimed to investigate the effect of different diol structures, both aliphatic and aromatic, on wood adhesives derived from renewable sources. Therefore, 1,3-propanediol (PRD), 1,5-pentanediol (PED), and hydroquinone (HQ) were used as crosslinkers with a non-edible oil-based polyol (castor oil (CO)). The HQ-based wood adhesive sample was anticipated to demonstrate higher mechanical strength due to its aromatic structure, which can impart rigidity and potentially lead to increased mechanical properties. Different weight percentages of diols relative to the bio-polyol were incorporated with the bio-polyol and isocyanate to prepare polyurethane (PU)-based wood adhesives, aiming to explore the effect of increasing diol concentrations on adhesive properties. All samples were cured at four different temperatures (room temperature, 50 °C, 75 °C, and 100 °C) to investigate thermal stability and mechanical strength. Unexpectedly, among all prepared adhesive samples, the PRD sample exhibited the highest mechanical strength (5.1 MPa). Gel and swell tests were conducted on all prepared samples to evaluate solubility, followed by FT-IR analysis to assess structural changes after these tests. No major changes were observed in the synthesized adhesive materials, indicating good crosslinking. The importance of bio-based materials in advanced wood adhesive applications is highlighted by our findings, which provide valuable insights into the design of sustainable PU adhesives with optimal characteristics.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"138 ","pages":"Article 103936"},"PeriodicalIF":3.2,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Adhesive modifiers for bitumen obtained from coumarone-indene fractions of liquid coal coking products","authors":"Serhiy Pyshyev , Yuriy Prysiazhnyi , Yuriy Demchuk , Guri Isaiah Borbeyiyong , Nataliya Vytrykush","doi":"10.1016/j.ijadhadh.2024.103933","DOIUrl":"10.1016/j.ijadhadh.2024.103933","url":null,"abstract":"<div><div>Modifiers are added to road bitumens to enhance their properties. The only significant disadvantage of current industrial modifiers is their relatively high cost. The authors develop a new way to solve this problem by using relatively cheap raw materials for obtaining effective adhesive modifiers for bitumen, namely, coal coking liquid products. Therefore, coumarone-indene resin (CIR) and coumarone-indene-carbazole resin (CICR) were obtained by ionic co-oligomerization based on fractions extracted from liquid products of coal coking (gasoline fractions and coal tar). When added in an amount of 7 wt%, CIR increases temperature resistance and doubles the adhesive properties of bitumens. However, CIR degrades the plasticity of bitumens, so to produce polymer-modified bitumen (PMB) cheap plasticizers (petroleum tar and resin from the decomposition of the organic mass of brown coal) must be used. CICR has practically no effect on the temperature resistance of bitumens, slightly improves their plasticity, and doubles the adhesion to glass at a content of 1 % wt.%. The CIR and CICR use will make it possible to obtain relatively inexpensive PMB.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"138 ","pages":"Article 103933"},"PeriodicalIF":3.2,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fiorella Elizabeth Arévalo Tarrillo, Laura Cristina Leite Nardello, Mary Caroline Skelton Macedo, Maria Ângela Pita Sobral
{"title":"Comparison of adhesive system bond strength in composite restoration repairs: A systematic review and meta-analysis of in vitro studies","authors":"Fiorella Elizabeth Arévalo Tarrillo, Laura Cristina Leite Nardello, Mary Caroline Skelton Macedo, Maria Ângela Pita Sobral","doi":"10.1016/j.ijadhadh.2024.103929","DOIUrl":"10.1016/j.ijadhadh.2024.103929","url":null,"abstract":"<div><div>Repairing localized failures in restorations can be as durable as complete replacement, offering a more conservative and efficient alternative. However, no \"standard\" protocol or ideal materials currently exist for this procedure. This systematic review (PROSPERO CRD42022322572) investigated different adhesive systems (Total-etch, Self-etch, and Universal) in repairing direct composite restorations. The review included <em>in vitro</em> studies that evaluated bond strength in composite repairs after surface roughening. A comprehensive literature searches up to April 18, 2022, across six databases (PubMed, Scopus, Web of Science, Embase, LILACS and BDTL), identified 133 relevant studies from an initial 1357, with 15 meeting the inclusion criteria. Fourteen of these studies underwent quantitative analysis and meta-analysis. Quality Assessment Tool for <em>In Vitro</em> Studies was used to evaluate methodological quality. The meta-analysis was performed with R Studio, used the standardized mean difference with a 95 % confidence interval to assess bond strength. The random-effects study heterogeneity using the I-squared statistic. Tensile/microtensile studies found that Total-etch systems were more effective in enhancing bond strength, whereas shear and micro-shear studies favored Self-etch systems. The Universal adhesives showed inconsistent results between the two bond strength tests. Both types of studies, demonstrated that employing an adhesive system enhances bond strength in repairs. The review highlights the need for standardized research to achieve more definitive conclusions.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"138 ","pages":"Article 103929"},"PeriodicalIF":3.2,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Baojia Cheng, Lina Lu, Leyao Xu, Haoyu Wang, Ben Ma, Anbo Du, Shumei Lou
{"title":"Synergistic effects of a bionic villi structure and multiple hydrogen bonds on the increase in interfacial bonding strength of a 30-wt.% GF/PET-2024 aluminum alloy","authors":"Baojia Cheng, Lina Lu, Leyao Xu, Haoyu Wang, Ben Ma, Anbo Du, Shumei Lou","doi":"10.1016/j.ijadhadh.2024.103932","DOIUrl":"10.1016/j.ijadhadh.2024.103932","url":null,"abstract":"<div><div>In recent years, metal‒thermoplastic polymer hybrid joints have been widely used in lightweight advanced aircraft and new energy vehicles. In this work, the method of machine milling + FeCl<sub>3</sub> corrosion + coating KH-892 was used to construct a viscous bionic villi structure on the surface of A2024 aluminum alloy, which greatly improved the interfacial bonding strength of a 30-wt.% glass fiber-reinforced PET-A2024 aluminum alloy joint (expressed as 30-wt.% GF/PET-A2024 joint). The synergistic action of the millimeter column produced by milling and the micron-scale porous structure produced by corrosion results in multiscale mechanical interlocking and increases the interfacial bonding strength of 30-wt.% GF/PET-A2024 to 44.2 MPa, which is 13.7 times greater than that of untreated joint. FTIR results show that the KH-892 coating can change the viscosity of the villi surface, which makes it easier for the bionic villi surface to bond with PET. Under the action of millimeter‒micron multiscale mechanical interlocking and multiple hydrogen bonds, the interfacial bonding strength of 30-wt.% GF/PET-A2024 increases to 54.8 MPa.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"138 ","pages":"Article 103932"},"PeriodicalIF":3.2,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}