William Garcia Alves , Luiza Freitas Brum Souza , Gabriel Kalil Rocha Pereira , Sara Fraga
{"title":"Effect of hydrofluoric acid etching and resin cement on the flexural strength of a leucite-reinforced glass ceramic with simulating CAD-CAM milling","authors":"William Garcia Alves , Luiza Freitas Brum Souza , Gabriel Kalil Rocha Pereira , Sara Fraga","doi":"10.1016/j.ijadhadh.2025.103946","DOIUrl":"10.1016/j.ijadhadh.2025.103946","url":null,"abstract":"<div><h3>Objectives</h3><div>To evaluate the effect of hydrofluoric acid etching and resin cement coating on the surface roughness and biaxial flexural strength of a leucite-reinforced glass ceramic ground with a diamond bur, following a protocol simulating CAD-CAM milling.</div></div><div><h3>Methods</h3><div>Leucite-reinforced glass ceramic (IPS Empress CAD, Ivoclar AG) discs were prepared and divided into four groups (n = 20): polishing (P); grinding (G); grinding followed by 5 % hydrofluoric acid application for 60s (GH); and grinding followed by 5 % hydrofluoric acid (HA) for 60s, silane, and resin cement application (GHRC). The discs were aged in distilled water at 37 °C for three months and subjected to surface roughness analysis and biaxial flexural strength testing (ISO 6872:2015). Data were compared using the Kruskal-Wallis test followed by Bonferroni-corrected multiple comparisons (α = 0.05). The flexural strength data were also subjected to Weibull analysis to determine the Weibull modulus.</div></div><div><h3>Results</h3><div>Grinding the ceramic surface with an extra-fine diamond bur increased the roughness and reduced the fracture strength when compared to the polishing group. Hydrofluoric acid (GH group) produced roughness values similar to those of the G group, without affecting the material's flexural strength (p > 0.05). Resin cement coating (GHRC group) was able to significantly increase the fracture strength, when compared to the GH group (p < 0.001), reaching similar values to the polishing group (p = 0.138). Weibull modulus of the P group was significantly lower than the G group.</div></div><div><h3>Conclusion</h3><div>Resin cement reversed the damage from grinding, restoring flexural strength to levels similar to the polished group. Hydrofluoric acid did not affect flexural strength.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"138 ","pages":"Article 103946"},"PeriodicalIF":3.2,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167990","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}
Anna Caroliny Detogni , Vitaliano Gomes de Araújo Neto , Caio Felipe de Almeida Nobre , Victor Pinheiro Feitosa , Mário Alexandre Coelho Sinhoreti
{"title":"Different contemporary resin cements for intracanal luting of glass fiber posts - Bonding and polymerization assessments","authors":"Anna Caroliny Detogni , Vitaliano Gomes de Araújo Neto , Caio Felipe de Almeida Nobre , Victor Pinheiro Feitosa , Mário Alexandre Coelho Sinhoreti","doi":"10.1016/j.ijadhadh.2025.103951","DOIUrl":"10.1016/j.ijadhadh.2025.103951","url":null,"abstract":"<div><div>This study evaluated the push-out bond strength (POBS) and the degree of conversion (DC) of contemporary resin cements employed for the luting of glass fiber posts, considering different root thirds and thermocycling aging. One hundred bovine incisors were assigned to five groups (n = 20): Universal resin cements (URCs) - Duo-link Universal, NX3 and RelyX Universal; Traditional adhesive resin cement (ARC) - RelyX Ultimate; and one self-etching resin cement (SERC) - Panavia V5. After luting glass fiber posts to intraradicular dentin, specimens were cut, and POBS was tested at 24h or after 10,000 thermocyclers. Failure modes were analyzed using a stereomicroscope. The degree of conversion (n = 3) was measured using Micro-Raman spectroscopy. Data were statistically analyzed by two-way (POBS) or one-way (DC) ANOVA and Tukey's post hoc test (α = 0.05). RelyX Universal and Duo-link Universal showed higher POBS than further cements at 24h and after thermocycling (p = 0.00644). Panavia V5 showed the lowest POBS. Coronal and middle thirds showed the highest POBS mean values for all resin cements, except for Panavia V5, which depicted similar bonding along all root thirds (p = 0.04571). Adhesive (cement-dentin) and mixed failures were the most prevalent for all groups. The coronal third showed the highest DC for all cements, and Panavia V5 depicted the lowest conversion, mainly in the apical third. This study demonstrated that the URCs may surpass traditional resin cement for luting glass fiber posts, but with similar polymerization.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"138 ","pages":"Article 103951"},"PeriodicalIF":3.2,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167992","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":"Reversal of NaCl effect on P. aeruginosa and E. coli bacterial adherents","authors":"Mourad Elgoulli, Souad Lekchiri, Taoufik Hakim, Chorouk Zanane, Soukaina Mitro, Mostafa Ellouali, Hafida Zahir, Hassan Latrache","doi":"10.1016/j.ijadhadh.2025.103947","DOIUrl":"10.1016/j.ijadhadh.2025.103947","url":null,"abstract":"<div><div>Sodium chloride (NaCl) has previously been proposed as a disinfectant for water networks, where it was able to detach a bacterial adherent of <em>Pseudomonas aeruginosa</em> within 1 h of treatment. The purpose here was to verify the effectiveness of NaCl against <em>P. aeruginosa</em> and <em>E. coli</em> bacterial adherents over time. To this end, the NaCl effects on the bacterial adherents' stability and the surface properties of glass and strains were estimated respectively by the optical microscopy and the contact angle method. The optical microscopy’ results showed a clear detachment of both bacterial adherents after 1 h of treatment. Though, a progressive re-adhesion and formation of micro-colonies took place during the following hours of treatment. The contact angle data showed that the changes in the hydrophobicity (ΔG<sub>iwi</sub>) of <em>P. aeruginosa</em> and <em>E. coli</em> were random throughout the treatment, while their electrons donor characters (γ<sup>−</sup>) were unchanged. Meanwhile, the hydrophobicity of the glass has been reversed during the first hour (40.7 to −31.7 mJ/m<sup>2</sup>) and its electrons donor character have weakened (51.9–7.4 mJ/m<sup>2</sup>). However, glass gradually regains its natural surface properties (ΔG<sub>iwi</sub>: −10.3, 0.80, 18.0 mJ/m<sup>2</sup>, γ<sup>−</sup>: 14, 27.4, 48.3 mJ/m<sup>2</sup>). In short, the findings suggested that the reinstallation of bacterial adherents could be an energetic phenomenon related to the energetic properties of the surfaces.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"138 ","pages":"Article 103947"},"PeriodicalIF":3.2,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167988","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}
R. Ciardiello , G. Belingardi , B. Martorana , V. Brunella , S.A. Hodge , D.T.L. Galhena , Y. Lin , A.C. Ferrari
{"title":"Reversible graphene-based adhesives for automotive applications","authors":"R. Ciardiello , G. Belingardi , B. Martorana , V. Brunella , S.A. Hodge , D.T.L. Galhena , Y. Lin , A.C. Ferrari","doi":"10.1016/j.ijadhadh.2025.103935","DOIUrl":"10.1016/j.ijadhadh.2025.103935","url":null,"abstract":"<div><div>This study introduces a reversible graphene-based adhesive activated by microwaves. Single-lap joint tests reveal a 20 % increase in stiffness with no compromise in load-bearing capacity compared to unmodified adhesives. The adhesive enables clean joint separation within 70 s using only 1 wt% graphene, significantly reducing the use of nanoparticles and power requirements compared to conventional nanoparticle-based methods presented in the literature. This approach demonstrates improved energy efficiency and potential for recycling and reusability of components in automotive manufacturing.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"138 ","pages":"Article 103935"},"PeriodicalIF":3.2,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167989","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":"Bond-slip failure characteristics of Fe-SMA-steel adhesively bonded joints","authors":"Xuhong Qiang , Zhihao Chen , Xu Jiang , Yuhang Lu","doi":"10.1016/j.ijadhadh.2025.103941","DOIUrl":"10.1016/j.ijadhadh.2025.103941","url":null,"abstract":"<div><div>The adhesively bonded method has gained increasing popularity in strengthening steel structures due to its excellent mechanical performance and efficient applicability, while the bond-slip failure characteristics of the Fe-SMA-steel bonded interface have received very limited attention. In light of this background, the bond-slip behavior of Fe-SMA-steel adhesively bonded joints is experimentally explored under shear tests in this study. Forty-five single-lap joints are tested to investigate the effects of adhesive type, adhesive layer thickness, steel plate thickness, and bond length. Test results indicate that the failure modes in Fe-SMA-steel adhesively bonded joints vary according to the adhesive used, resulting in distinct strain distributions. The bond capacity of the joints subjected to adhesive layer failure is higher than that of the joints subjected to interface debonding. Simplified bond-slip consecutive models of bonded interfaces with three types of adhesives are proposed and validated with experimental findings, featuring the predictive formulas of critical parameters including peak shear stress, local slip, and corresponding ultimate slip at the peak shear stress. Also, theoretical models for bond capacity and effective bond length of Fe-SMA-steel interface are proposed by introducing stiffness reduction coefficients into the existing studies on CFRP-steel interface. Compared to experimental outcomes, the revised model can offer satisfactory predictions and practical guidance for the interfacial behavior of Fe-SMA-steel adhesively bonded joints.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"138 ","pages":"Article 103941"},"PeriodicalIF":3.2,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169151","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":"A review of waste-derived fillers for enhancing the properties of epoxy resins","authors":"Arif Emre Ağcan, İlyas Kartal","doi":"10.1016/j.ijadhadh.2025.103944","DOIUrl":"10.1016/j.ijadhadh.2025.103944","url":null,"abstract":"<div><div>There is a growing interest among scientists in recycling waste materials to utilize them as fillers in polymer matrices. This approach aims to mitigate the harmful effects of waste materials and reduce costs by enhancing or maintaining various properties of polymers. Epoxy is one of the most used polymers in composite production, and research on the use of waste-derived fillers in epoxy resins has been steadily increasing over the years. These waste fillers can take the form of fibers or powders, derived from agro, bio, or industrial sources. Examples of these waste fillers can encompass a wide range of materials, from waste rubber particles to waste animal wool. In the studies from the literature, investigations of the properties were generally conducted based on filler ratio, size, treatment, and hybrid usage. Some of the properties examined include physical, mechanical, thermal, electrical, tribological, viscoelastic, wear, adhesive, and insulation properties. The present work focuses on the property improvement of epoxy resin incorporating waste-derived fillers, sourced from the literature, and categorizes them based on the effects of filler ratio, size, treatment, and hybrid usage. There are many polymer derivatives beyond epoxy and a wide variety of agro, bio, and industrial wastes globally. Consequently, this review can assist researchers in trying different characterizations, combinations and derivatives of these wastes in polymers.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"138 ","pages":"Article 103944"},"PeriodicalIF":3.2,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169153","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}
M.A. Errahmane , M. Benyettou , K. Madani , L. Rezgani , H. Amin , S.C. Djebbar , M. Belhouari , R.D.S.G. Campliho , X. Feaugas
{"title":"Numerical and experimental analysis of the performance of the metal patch compared to the composite patch under aging conditions in water immersion","authors":"M.A. Errahmane , M. Benyettou , K. Madani , L. Rezgani , H. Amin , S.C. Djebbar , M. Belhouari , R.D.S.G. Campliho , X. Feaugas","doi":"10.1016/j.ijadhadh.2025.103943","DOIUrl":"10.1016/j.ijadhadh.2025.103943","url":null,"abstract":"<div><div>This study investigates the mechanical performance of 2024-T3 aluminum plates repaired with metallic and composite patches under accelerated aging in water immersion. The adhesive and composite patch properties were experimentally characterized for various immersion durations and integrated into numerical models. Results revealed a substantial decline in stress transfer efficiency with aging, particularly for composite patches, which become less effective in absorbing stresses under humid conditions. Key factors, including loading type, crack length, immersion duration, and patch material, were analyzed. Stress analysis highlights the degradation of both the adhesive and the composite patch, leading to reduced load transfer from the damaged area. These findings show the critical impact of environmental conditions on the durability of bonded repairs and provide insights to optimize repair strategies for long-term performance. This work uniquely compares the performance of metallic and composite patch repairs on aluminum plates under aging conditions, highlighting the superior long-term durability of metallic patches in humid environments due to their resistance to water-induced degradation.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"138 ","pages":"Article 103943"},"PeriodicalIF":3.2,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167991","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}
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}