Pub Date : 2025-11-20DOI: 10.1016/j.ijadhadh.2025.104210
Izabela Miturska-Barańska, Anna Rudawska
Epoxy coatings are widely used due to their strong adhesion and mechanical performance, yet they often suffer from brittleness and limited durability. The effect of montmorillonite (MMT, NanoBent ZR2) on the mechanical and adhesion performance of epoxy coatings cured with polyamide (PAC) and amine (IDA) agents was systematically investigated. Unlike previous studies focusing solely on filler addition, this work examines the combined influence of curing agent chemistry and thermal conditioning. The incorporation of 3 wt% MMT increased tensile strength and bending strength of PAC-based coatings by up to 15 % and 20 %, respectively, after conditioning at 50 °C. In contrast, IDA-based systems showed limited improvement and higher brittleness. Conditioning temperature strongly affected performance: specimens cured at 50 °C exhibited more than 40 % higher tensile strength compared with those conditioned at 0 °C. PAC-based coatings also demonstrated superior adhesion (ASTM 5B rating) and cohesive failure modes, while IDA-based coatings frequently failed adhesively. These results highlight that optimizing both curing chemistry and nanofiller content yields epoxy coatings with enhanced mechanical strength and interfacial durability.
{"title":"Influence of montmorillonite on the structure and mechanical properties of epoxy coatings","authors":"Izabela Miturska-Barańska, Anna Rudawska","doi":"10.1016/j.ijadhadh.2025.104210","DOIUrl":"10.1016/j.ijadhadh.2025.104210","url":null,"abstract":"<div><div>Epoxy coatings are widely used due to their strong adhesion and mechanical performance, yet they often suffer from brittleness and limited durability. The effect of montmorillonite (MMT, NanoBent ZR2) on the mechanical and adhesion performance of epoxy coatings cured with polyamide (PAC) and amine (IDA) agents was systematically investigated. Unlike previous studies focusing solely on filler addition, this work examines the combined influence of curing agent chemistry and thermal conditioning. The incorporation of 3 wt% MMT increased tensile strength and bending strength of PAC-based coatings by up to 15 % and 20 %, respectively, after conditioning at 50 °C. In contrast, IDA-based systems showed limited improvement and higher brittleness. Conditioning temperature strongly affected performance: specimens cured at 50 °C exhibited more than 40 % higher tensile strength compared with those conditioned at 0 °C. PAC-based coatings also demonstrated superior adhesion (ASTM <span><span>5B</span><svg><path></path></svg></span> rating) and cohesive failure modes, while IDA-based coatings frequently failed adhesively. These results highlight that optimizing both curing chemistry and nanofiller content yields epoxy coatings with enhanced mechanical strength and interfacial durability.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"145 ","pages":"Article 104210"},"PeriodicalIF":3.5,"publicationDate":"2025-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145615424","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}
Pub Date : 2025-11-19DOI: 10.1016/j.ijadhadh.2025.104205
Suellen Tayenne Pedrosa Pinto , Helena de Paiva Memento Machado , Marcela de Come Ramos , Mariana Bena Gelio , Carlos Rangel de Moura Oliveira , Milton Carlos Kuga , Mário Tanomaru-Filho , José Maurício dos Santos Nunes Reis
This in vitro study evaluated the bond strength and adhesive interface of glass fiber posts luted to root dentin using different luting materials, adhesive systems and acid etching protocols. Sixty bovine incisors were endodontically treated and randomly divided into six groups (n = 10) according to the glass fiber posts cementation protocol and materials: RDC (Rebilda DC, Voco), RDC-AC (Rebilda DC with phosphoric acid etching), ACC (Allcem Core, FGM), ACC-AC (Allcem Core with phosphoric acid etching), RU (RelyX Ultimate, 3M ESPE), and RU-AC (RelyX Ultimate with phosphoric acid etching). After cementation of the posts (Whitepost DC1), the specimens were thermocycled (10,000 cycles; 5–55 °C; 30 s dwell time) and sectioned into cervical, middle, and apical thirds. Push-out bond strength tests were performed (EMIC DL2000; 2.0 kN load cell; 0.5 mm/min), along with confocal laser scanning microscopy to assess the adhesive interface. Failure modes were classified under stereomicroscopy (20 × ), and representative images were obtained via scanning electron microscopy (SEM). Data were analyzed by 3-way ANOVA and Tukey's HSD post-hoc test (α = 0.05). The cervical third exhibited the highest bond strength values (p < 0.05), irrespective of the luting material or dentin adhesive protocol. The RDC-AC group presented significantly higher values than RDC, ACC, and ACC-AC, while being statistically similar (p > 0.05) to RU and RU-AC. Adhesive failure between the cement and dentin was the most prevalent, regardless of the root third or cementation protocol. Overall, acid etching of intraradicular dentin positively influenced the adhesion of glass fiber posts.
Clinical significance
Acid etching of root dentin may enhance the bonding performance of glass fiber posts, contributing to the long-term success of adhesive restorations in severely compromised teeth.
{"title":"Influence of different cementation protocols on the bond strength of glass fiber posts to root dentin: An in vitro study with quantitative and qualitative analyses","authors":"Suellen Tayenne Pedrosa Pinto , Helena de Paiva Memento Machado , Marcela de Come Ramos , Mariana Bena Gelio , Carlos Rangel de Moura Oliveira , Milton Carlos Kuga , Mário Tanomaru-Filho , José Maurício dos Santos Nunes Reis","doi":"10.1016/j.ijadhadh.2025.104205","DOIUrl":"10.1016/j.ijadhadh.2025.104205","url":null,"abstract":"<div><div>This in vitro study evaluated the bond strength and adhesive interface of glass fiber posts luted to root dentin using different luting materials, adhesive systems and acid etching protocols. Sixty bovine incisors were endodontically treated and randomly divided into six groups (n = 10) according to the glass fiber posts cementation protocol and materials: <em>RDC</em> (Rebilda DC, Voco), <em>RDC-AC</em> (Rebilda DC with phosphoric acid etching), <em>ACC</em> (Allcem Core, FGM), <em>ACC-AC</em> (Allcem Core with phosphoric acid etching), <em>RU</em> (RelyX Ultimate, 3M ESPE), and <em>RU-AC</em> (RelyX Ultimate with phosphoric acid etching). After cementation of the posts (Whitepost DC1), the specimens were thermocycled (10,000 cycles; 5–55 °C; 30 s dwell time) and sectioned into cervical, middle, and apical thirds. Push-out bond strength tests were performed (EMIC DL2000; 2.0 kN load cell; 0.5 mm/min), along with confocal laser scanning microscopy to assess the adhesive interface. Failure modes were classified under stereomicroscopy (20 × ), and representative images were obtained via scanning electron microscopy (SEM). Data were analyzed by 3-way ANOVA and Tukey's HSD post-hoc test (α = 0.05). The cervical third exhibited the highest bond strength values (p < 0.05), irrespective of the luting material or dentin adhesive protocol. The <em>RDC-AC</em> group presented significantly higher values than <em>RDC</em>, <em>ACC</em>, and <em>ACC-AC</em>, while being statistically similar (p > 0.05) to <em>RU</em> and <em>RU-AC</em>. Adhesive failure between the cement and dentin was the most prevalent, regardless of the root third or cementation protocol. Overall, acid etching of intraradicular dentin positively influenced the adhesion of glass fiber posts.</div></div><div><h3>Clinical significance</h3><div>Acid etching of root dentin may enhance the bonding performance of glass fiber posts, contributing to the long-term success of adhesive restorations in severely compromised teeth.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"145 ","pages":"Article 104205"},"PeriodicalIF":3.5,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145577278","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}
Silane functionalization is widely used for metal surface modification. This study explores the self-assembly of silane-TiO2 composite thin film on stainless steel to enhance surface properties. The coatings were systematically characterized using scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, attenuated total reflectance-Fourier transform infrared spectroscopy, and surface profiler. Structure-property relationships (hydrophobicity, adhesion strength, corrosion resistance, and hardness) were evaluated by using static water contact angle measurement, cross-cut adhesion test, acid droplet corrosion test, and Shore durometer hardness test, respectively. The incorporation of TiO2 nanoparticles within the silane matrix improved thermal stability and corrosion resistance compared to pure silane coatings. Fluorine functionalization significantly enhanced the hydrophobicity and the corresponding corrosion resistance of the TiO2@Si composite film. The TiO2@Si composite with silane:TiO2 molar ratio of 0.06:1 exhibited the best adhesion (5B), whereas higher silane concentrations led to reduced adhesion of the TiO2@Si composite films. Hardness tests revealed that the optimal hardness of composite films, 76.3 Shore D, was also achieved at a silane:TiO2 molar ratio of 0.06:1. This work provides insights into the structure-property relationships of silane-nanoparticle composite films for stainless steel surface modification, highlighting the potential for tailored functional coatings through compositional control and surface functionalization.
{"title":"Tailored functional coatings on metal surface using silane-nanoparticle composite colloid","authors":"Yi-Jun Wang, Duraisamy Senthil Raja, Khang Nhat Nguyen, De-Hao Tsai","doi":"10.1016/j.ijadhadh.2025.104224","DOIUrl":"10.1016/j.ijadhadh.2025.104224","url":null,"abstract":"<div><div>Silane functionalization is widely used for metal surface modification. This study explores the self-assembly of silane-TiO<sub>2</sub> composite thin film on stainless steel to enhance surface properties. The coatings were systematically characterized using scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, attenuated total reflectance-Fourier transform infrared spectroscopy, and surface profiler. Structure-property relationships (hydrophobicity, adhesion strength, corrosion resistance, and hardness) were evaluated by using static water contact angle measurement, cross-cut adhesion test, acid droplet corrosion test, and Shore durometer hardness test, respectively. The incorporation of TiO<sub>2</sub> nanoparticles within the silane matrix improved thermal stability and corrosion resistance compared to pure silane coatings. Fluorine functionalization significantly enhanced the hydrophobicity and the corresponding corrosion resistance of the TiO<sub>2</sub>@Si composite film. The TiO<sub>2</sub>@Si composite with silane:TiO<sub>2</sub> molar ratio of 0.06:1 exhibited the best adhesion (5B), whereas higher silane concentrations led to reduced adhesion of the TiO<sub>2</sub>@Si composite films. Hardness tests revealed that the optimal hardness of composite films, 76.3 Shore D, was also achieved at a silane:TiO<sub>2</sub> molar ratio of 0.06:1. This work provides insights into the structure-property relationships of silane-nanoparticle composite films for stainless steel surface modification, highlighting the potential for tailored functional coatings through compositional control and surface functionalization.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"145 ","pages":"Article 104224"},"PeriodicalIF":3.5,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145577277","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}
Pub Date : 2025-11-19DOI: 10.1016/j.ijadhadh.2025.104220
Michael Engelmann, Johannes Giese-Hinz, Silke Tasche
Silicones are elastic sealants and adhesives. They are able to compensate for unevenness and temperature longitudinal expansions between various joining materials. In accordance with the requirements of ETAG 002-1, these adhesives combine the optimal weather and UV resistance with very good adhesion. As a result, they are the only adhesives suitable for structural sealant glazing in bonded façades.
Analogous to the effect of fiber-reinforced plastics, where a load is transferred from the polymer matrix to the fibers, the specific use of yarns, cords and fabrics in elastomers already enables high-performance composite materials for conveyor belts, tires and tubes. It is hypothesized that this effect can be transferred by using short fibers to create fiber reinforced structural silicone adhesives (FRSSG). This article investigates the possibilities and technical risks associated with mixing short fibers into 2K silicone adhesives for use in the building industry. This study covers 8 different short fibers or fillers, each in 3 different proportions.
In a first step, we conducted 125 dogbone tensile tests (DIN EN ISO 527) to describe strength, stiffness and failure behavior of FRSSG in an exploratory fashion. A wide range of natural or industrial fibers have different effects on the mechanical properties of a silicone adhesive. For instance, cotton fibers have been shown to enhance adhesive stiffness by a factor between 50 % and 500 %. In a second step, adhesion tensile tests (ETAG 002-1) using 50 specimens were performed to compare typical technical properties. An increase in strength by 5 %–30 % was recorded. In total, 175 specimens were tested for the effect of fibers on technical properties. The results will open up interesting applications and great research potential.
有机硅是一种弹性密封剂和粘合剂。它们能够补偿各种连接材料之间的不均匀性和温度纵向膨胀。根据ETAG 002-1的要求，这些粘合剂结合了最佳的耐候性和抗紫外线性，具有非常好的附着力。因此，它们是唯一适用于粘合面结构密封玻璃的粘合剂。与纤维增强塑料的作用类似，负载从聚合物基体转移到纤维，在弹性体中使用纱线，绳索和织物的特定用途已经使传送带，轮胎和管道的高性能复合材料成为可能。假设这种效果可以通过使用短纤维来制造纤维增强结构硅酮胶粘剂（FRSSG）来转移。本文调查的可能性和技术风险相关的混合短纤维到2K有机硅胶粘剂用于建筑行业。这项研究涵盖了8种不同的短纤维或填料，每一种都有3种不同的比例。第一步，我们进行了125次犬骨拉伸试验（DIN EN ISO 527），以探索性的方式描述FRSSG的强度、刚度和破坏行为。广泛的天然或工业纤维对硅酮粘合剂的机械性能有不同的影响。例如，棉纤维已被证明可以将粘合剂的硬度提高50%到500%。在第二步中，使用50个样品进行粘合拉伸试验（ETAG 002-1），以比较典型的技术性能。强度增加了5% - 30%。总共测试了175个纤维对技术性能的影响。该结果将开辟有趣的应用和巨大的研究潜力。
{"title":"Short-fiber-reinforced structural silicone for facades: Potential & performance","authors":"Michael Engelmann, Johannes Giese-Hinz, Silke Tasche","doi":"10.1016/j.ijadhadh.2025.104220","DOIUrl":"10.1016/j.ijadhadh.2025.104220","url":null,"abstract":"<div><div>Silicones are elastic sealants and adhesives. They are able to compensate for unevenness and temperature longitudinal expansions between various joining materials. In accordance with the requirements of ETAG 002-1, these adhesives combine the optimal weather and UV resistance with very good adhesion. As a result, they are the only adhesives suitable for structural sealant glazing in bonded façades.</div><div>Analogous to the effect of fiber-reinforced plastics, where a load is transferred from the polymer matrix to the fibers, the specific use of yarns, cords and fabrics in elastomers already enables high-performance composite materials for conveyor belts, tires and tubes. It is hypothesized that this effect can be transferred by using short fibers to create fiber reinforced structural silicone adhesives (FRSSG). This article investigates the possibilities and technical risks associated with mixing short fibers into 2K silicone adhesives for use in the building industry. This study covers 8 different short fibers or fillers, each in 3 different proportions.</div><div>In a first step, we conducted 125 dogbone tensile tests (DIN EN ISO 527) to describe strength, stiffness and failure behavior of FRSSG in an exploratory fashion. A wide range of natural or industrial fibers have different effects on the mechanical properties of a silicone adhesive. For instance, cotton fibers have been shown to enhance adhesive stiffness by a factor between 50 % and 500 %. In a second step, adhesion tensile tests (ETAG 002-1) using 50 specimens were performed to compare typical technical properties. An increase in strength by 5 %–30 % was recorded. In total, 175 specimens were tested for the effect of fibers on technical properties. The results will open up interesting applications and great research potential.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"147 ","pages":"Article 104220"},"PeriodicalIF":3.5,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145974671","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}
Pub Date : 2025-11-19DOI: 10.1016/j.ijadhadh.2025.104209
Han Zhang, Jian Li, Rengui Bi, Yang Liu, Zhenya Ding, Hang Zhang, Feng Liu, Yuhang Liu, Min Zou, Lin Liu
Adhesive deficiency, characterized by incomplete or insufficient adhesive application, is a common manufacturing defect in bonded structures. This study systematically investigates the impact of adhesive deficiency on the strength and durability of aluminum alloy adhesive joints through combined experimental and finite element analysis. The results demonstrate that joint strength is significantly influenced by the area, location, and dispersion of adhesive deficiency. Strength degradation increases with larger deficient areas, with reductions ranging from 12.7 % with 10 % deficiency at the front edge to 48.3 % with 40 % deficiency at the center. The location of deficiency follows the performance order: front edge > angle corner > side edge > center. Simulations show good agreement with experiments, with errors of about 5 %. Additionally, under a fixed deficiency area, dispersed defects, such as two discrete zones, result in better strength retention than concentrated ones. Environmental aging tests further reveal that proper defect location and dispersion help mitigate long-term strength degradation. These findings provide valuable guidance for optimizing adhesive joint design and assessing defect tolerance in practical applications.
{"title":"Study on the effect of adhesive deficiency on the strength performance of aluminum alloy adhesive joints","authors":"Han Zhang, Jian Li, Rengui Bi, Yang Liu, Zhenya Ding, Hang Zhang, Feng Liu, Yuhang Liu, Min Zou, Lin Liu","doi":"10.1016/j.ijadhadh.2025.104209","DOIUrl":"10.1016/j.ijadhadh.2025.104209","url":null,"abstract":"<div><div>Adhesive deficiency, characterized by incomplete or insufficient adhesive application, is a common manufacturing defect in bonded structures. This study systematically investigates the impact of adhesive deficiency on the strength and durability of aluminum alloy adhesive joints through combined experimental and finite element analysis. The results demonstrate that joint strength is significantly influenced by the area, location, and dispersion of adhesive deficiency. Strength degradation increases with larger deficient areas, with reductions ranging from 12.7 % with 10 % deficiency at the front edge to 48.3 % with 40 % deficiency at the center. The location of deficiency follows the performance order: front edge > angle corner > side edge > center. Simulations show good agreement with experiments, with errors of about 5 %. Additionally, under a fixed deficiency area, dispersed defects, such as two discrete zones, result in better strength retention than concentrated ones. Environmental aging tests further reveal that proper defect location and dispersion help mitigate long-term strength degradation. These findings provide valuable guidance for optimizing adhesive joint design and assessing defect tolerance in practical applications.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"145 ","pages":"Article 104209"},"PeriodicalIF":3.5,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145615423","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}
Pub Date : 2025-11-19DOI: 10.1016/j.ijadhadh.2025.104206
Mahla Khosroabadi , Ebrahim Khosroabadi
Objective
To quantify the effect of surface-treatment protocols on the bond strength between high-performance polymers—polyetheretherketone (PEEK) and polyetherketoneketone (PEKK)—and acrylic resin materials used in prosthodontics. The review addressed the PICO question: Among in vitro studies on PEEK/PEKK specimens, which mechanical, chemical, or laser surface treatments improve adhesion to acrylic resins compared with untreated surfaces?
Methods
Following PRISMA 2020 guidelines (PROSPERO: CRD420251050752), electronic searches of PubMed, Scopus, Web of Science, and Embase were conducted up to June 2024. In vitro studies evaluating bond strength between treated and untreated PEEK/PEKK specimens and acrylic resins were included. Methodological quality was assessed using the Faggion Jr. (2012) tool. Random-effects meta-analysis with subgroup and meta-regression analyses explored sources of heterogeneity.
Results
Ten studies involving 1208 specimens met the inclusion criteria. Laser irradiation, sulfuric acid etching, and tribochemical silica coating with silane primer significantly increased bond strength compared with untreated controls (p < 0.001). Although heterogeneity was high (I2 = 92.8 %), resin type and aging protocol explained part of the variance, whereas differences in testing mode contributed most to residual variability. Most studies showed moderate risk of bias, mainly due to lack of randomization and blinding.
Conclusions
Surface modification markedly enhances the adhesion of PEEK and PEKK to acrylic resins. Combined mechanical–chemical or laser-based treatments provide the most consistent improvements. Standardized testing protocols and higher methodological rigor are required to validate these findings.
Clinical significance
Optimized surface-conditioning protocols are essential for durable, predictable bonding between high-performance polymers and acrylic resins, enabling broader clinical use of PEEK- and PEKK-based prosthetic frameworks.
目的探讨不同表面处理方式对口腔修复中高性能聚合物聚醚醚酮（PEEK）和聚醚酮酮（PEKK）与丙烯酸树脂材料结合强度的影响。该综述解决了PICO问题：在PEEK/PEKK样品的体外研究中，与未经处理的表面相比，机械、化学或激光表面处理哪种能改善丙烯酸树脂的附着力？方法按照PRISMA 2020指南（PROSPERO: CRD420251050752），截止2024年6月对PubMed、Scopus、Web of Science和Embase进行电子检索。体外研究评估处理和未处理的PEEK/PEKK标本与丙烯酸树脂之间的结合强度。使用Faggion Jr.（2012）工具评估方法学质量。随机效应荟萃分析与亚组和荟萃回归分析探讨了异质性的来源。结果10项研究共纳入1208例标本，符合纳入标准。与未处理的对照组相比，激光照射、硫酸蚀刻和硅烷底漆的摩擦化学二氧化硅涂层显著提高了粘结强度（p < 0.001）。虽然异质性很高（I2 = 92.8%），但树脂类型和老化方案解释了部分方差，而测试模式的差异对剩余变异性贡献最大。大多数研究显示中等偏倚风险，主要是由于缺乏随机化和盲法。结论表面改性能显著增强PEEK和PEKK对丙烯酸树脂的附着力。机械-化学或激光联合治疗提供了最一致的改善。需要标准化的测试方案和更高的方法严谨性来验证这些发现。优化的表面调节方案对于高性能聚合物和丙烯酸树脂之间持久、可预测的粘合至关重要，使PEEK和pek基假体框架的临床应用更加广泛。
{"title":"Effect of surface treatments on the bond strength between high-performance polymers (PEEK/PEKK) and acrylic resin materials: A systematic review and meta-analysis","authors":"Mahla Khosroabadi , Ebrahim Khosroabadi","doi":"10.1016/j.ijadhadh.2025.104206","DOIUrl":"10.1016/j.ijadhadh.2025.104206","url":null,"abstract":"<div><h3>Objective</h3><div>To quantify the effect of surface-treatment protocols on the bond strength between high-performance polymers—polyetheretherketone (PEEK) and polyetherketoneketone (PEKK)—and acrylic resin materials used in prosthodontics. The review addressed the PICO question: Among in vitro studies on PEEK/PEKK specimens, which mechanical, chemical, or laser surface treatments improve adhesion to acrylic resins compared with untreated surfaces?</div></div><div><h3>Methods</h3><div>Following PRISMA 2020 guidelines (PROSPERO: CRD420251050752), electronic searches of PubMed, Scopus, Web of Science, and Embase were conducted up to June 2024. In vitro studies evaluating bond strength between treated and untreated PEEK/PEKK specimens and acrylic resins were included. Methodological quality was assessed using the Faggion Jr. (2012) tool. Random-effects meta-analysis with subgroup and meta-regression analyses explored sources of heterogeneity.</div></div><div><h3>Results</h3><div>Ten studies involving 1208 specimens met the inclusion criteria. Laser irradiation, sulfuric acid etching, and tribochemical silica coating with silane primer significantly increased bond strength compared with untreated controls (p < 0.001). Although heterogeneity was high (I<sup>2</sup> = 92.8 %), resin type and aging protocol explained part of the variance, whereas differences in testing mode contributed most to residual variability. Most studies showed moderate risk of bias, mainly due to lack of randomization and blinding.</div></div><div><h3>Conclusions</h3><div>Surface modification markedly enhances the adhesion of PEEK and PEKK to acrylic resins. Combined mechanical–chemical or laser-based treatments provide the most consistent improvements. Standardized testing protocols and higher methodological rigor are required to validate these findings.</div></div><div><h3>Clinical significance</h3><div>Optimized surface-conditioning protocols are essential for durable, predictable bonding between high-performance polymers and acrylic resins, enabling broader clinical use of PEEK- and PEKK-based prosthetic frameworks.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"145 ","pages":"Article 104206"},"PeriodicalIF":3.5,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145577275","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}
Pub Date : 2025-11-17DOI: 10.1016/j.ijadhadh.2025.104222
Wenyi Wang , Dechong Ma , Hongxia Du , Sai Pan , Guowen He
Waste plastics can be reused to enhance the rutting resistance and lower the costs of road infrastructure projects. However, it is challenging to comprehensively modify asphalt using a single type of waste plastic while simultaneously meeting the many demands of modern road construction projects. This study investigated how adding maleic anhydride (MAH), phthalic anhydride (PA), di-octyl phthalate (DOP), and CaCO3 to recycled low-density polyethylene (RLDPE) affected the properties of modified asphalt and asphalt mixtures. The objective was to selectively enhance the characteristics of modified asphalt and asphalt mixtures by adjusting additive composition and proportions. To this end, the conventional properties, rheological properties, and creep characteristics of asphalt, as well as the fatigue performance of asphalt mixtures, were evaluated after adding additive/RLDPE composites. The results indicated that adding MAH enhanced the rutting resistance and crack resistance of RLDPE. MSCR and DSR tests confirmed that the rutting resistance and crack resistance both outperformed those of conventional asphalt. The bending fatigue and BBR test results indicated that DOP improved the low-temperature crack resistance of asphalt mixtures. CaCO3 improved the tensile strength ratio (TSR) and water damage resistance of the mixtures. The results of polarized optical microscopy (POM), FTIR spectroscopy, and SEM were used to propose a mechanism to explain how the different additive/RLDPE composites changed the properties of modified asphalt and asphalt mixtures. The study provides a method to regulate the performance of RLDPE composite-modified asphalt with different functional additives.
{"title":"Properties and microstructures of additives/RLDPE compound-modified asphalt and its effect on mixtures performance","authors":"Wenyi Wang , Dechong Ma , Hongxia Du , Sai Pan , Guowen He","doi":"10.1016/j.ijadhadh.2025.104222","DOIUrl":"10.1016/j.ijadhadh.2025.104222","url":null,"abstract":"<div><div>Waste plastics can be reused to enhance the rutting resistance and lower the costs of road infrastructure projects. However, it is challenging to comprehensively modify asphalt using a single type of waste plastic while simultaneously meeting the many demands of modern road construction projects. This study investigated how adding maleic anhydride (MAH), phthalic anhydride (PA), di-octyl phthalate (DOP), and CaCO<sub>3</sub> to recycled low-density polyethylene (RLDPE) affected the properties of modified asphalt and asphalt mixtures. The objective was to selectively enhance the characteristics of modified asphalt and asphalt mixtures by adjusting additive composition and proportions. To this end, the conventional properties, rheological properties, and creep characteristics of asphalt, as well as the fatigue performance of asphalt mixtures, were evaluated after adding additive/RLDPE composites. The results indicated that adding MAH enhanced the rutting resistance and crack resistance of RLDPE. MSCR and DSR tests confirmed that the rutting resistance and crack resistance both outperformed those of conventional asphalt. The bending fatigue and BBR test results indicated that DOP improved the low-temperature crack resistance of asphalt mixtures. CaCO<sub>3</sub> improved the tensile strength ratio (TSR) and water damage resistance of the mixtures. The results of polarized optical microscopy (POM), FTIR spectroscopy, and SEM were used to propose a mechanism to explain how the different additive/RLDPE composites changed the properties of modified asphalt and asphalt mixtures. The study provides a method to regulate the performance of RLDPE composite-modified asphalt with different functional additives.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"145 ","pages":"Article 104222"},"PeriodicalIF":3.5,"publicationDate":"2025-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145577276","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}
Pub Date : 2025-11-14DOI: 10.1016/j.ijadhadh.2025.104219
Yuqiong Xu , Bo Tao , Zihao Peng
High-frequency ultrasonic vibrations significantly enhance adhesive fluidity, facilitating deeper penetration and improving uniformity across the surface asperities of adherends, thereby optimizing the mechanical performance of bonded joints. This study proposed a technique to optimize the performance of adhesive-bonded joints with ultrasonic vibration assistance, systematically exploring the synergistic effects of ultrasonic parameters (preprocessing power, preprocessing time, preprocessing pulse duty cycle) on shear strength through experimental and modeling approaches. Building on single-factor experiments, response surface methodology (RSM) was incorporated to address the nonlinear coupling effects among parameters, with shear strength selected as the critical response variable for optimization. The RSM optimization identified the optimal parameters as follows: vibration power of 182.65 W, vibration time of 47 min, and pulse duty cycle of 58 %. Joints manufactured under optimized conditions demonstrated a shear strength of 18.17 MPa, deviating by only 1.03 % from the RSM-predicted value (18.36 MPa), confirming the model's accuracy. Cohesive failure analysis through digital image processing (AutoCAD) indicated a cohesive damage area of 97.96 % for optimized joints, representing a 132.13 % improvement over untreated specimens (42.20 %).
{"title":"Synergistic optimization of adhesive joint process parameters via high-frequency ultrasonic vibration and response surface methodology: Mechanisms for shear performance enhancement","authors":"Yuqiong Xu , Bo Tao , Zihao Peng","doi":"10.1016/j.ijadhadh.2025.104219","DOIUrl":"10.1016/j.ijadhadh.2025.104219","url":null,"abstract":"<div><div>High-frequency ultrasonic vibrations significantly enhance adhesive fluidity, facilitating deeper penetration and improving uniformity across the surface asperities of adherends, thereby optimizing the mechanical performance of bonded joints. This study proposed a technique to optimize the performance of adhesive-bonded joints with ultrasonic vibration assistance, systematically exploring the synergistic effects of ultrasonic parameters (preprocessing power, preprocessing time, preprocessing pulse duty cycle) on shear strength through experimental and modeling approaches. Building on single-factor experiments, response surface methodology (RSM) was incorporated to address the nonlinear coupling effects among parameters, with shear strength selected as the critical response variable for optimization. The RSM optimization identified the optimal parameters as follows: vibration power of 182.65 W, vibration time of 47 min, and pulse duty cycle of 58 %. Joints manufactured under optimized conditions demonstrated a shear strength of 18.17 MPa, deviating by only 1.03 % from the RSM-predicted value (18.36 MPa), confirming the model's accuracy. Cohesive failure analysis through digital image processing (AutoCAD) indicated a cohesive damage area of 97.96 % for optimized joints, representing a 132.13 % improvement over untreated specimens (42.20 %).</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"145 ","pages":"Article 104219"},"PeriodicalIF":3.5,"publicationDate":"2025-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145518264","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}
Pub Date : 2025-11-14DOI: 10.1016/j.ijadhadh.2025.104211
Rhafaela R. Silva , Paulo Soares , Rodrigo N. Rached , Evelise M. Souza
Bioceramic endodontic sealers may represent an alternative for post cementation, as they establish chemical bonding with dentin through interaction with hydroxyapatite. This study aimed to evaluate the push-out bond strength of prefabricated (P), customized (C), and single-adjustable (S) glass fiber posts luted with either a self-adhesive resin cement (U200) or an experimental bioceramic endodontic sealer (BC). Seventy-two endodontically treated premolars were divided into six groups (n = 12) according to the combination of post type and cement. The roots were sectioned into 1-mm-thick slices for push-out bond strength testing. Representative specimens were analyzed using SEM and EDS. Data were analyzed using three-way ANOVA and the Games-Howell test (α = 0.05). P-BC, C-BC, and S-BC exhibited significantly lower mean bond strengths at the cervical and middle thirds compared to the U200 groups (p < 0.05). P-U200 and S-U200 demonstrated higher bond strength than C-U200 at the cervical and middle thirds (p < 0.05). Posts luted with BC showed significantly lower bond strength than U200 (p < 0.05). SEM/EDS analysis revealed calcium hydroxide crystal deposition at the dentin/BC interface, while U200 specimens showed resin tags and signs of chemical interaction with dentin. The experimental bioceramic sealer was less effective than self-adhesive resin cement for cementing glass fiber posts. The single-adjustable post exhibited bond strength comparable to that of the prefabricated post, regardless of the cement type or root third. Therefore, single-adjustable glass fiber posts may serve as a viable and time-efficient alternative to customized posts for restoring flared root canals.
{"title":"Push-out bond strength of different fiber posts cemented with self-adhesive resin cement vs. experimental bioceramic sealer","authors":"Rhafaela R. Silva , Paulo Soares , Rodrigo N. Rached , Evelise M. Souza","doi":"10.1016/j.ijadhadh.2025.104211","DOIUrl":"10.1016/j.ijadhadh.2025.104211","url":null,"abstract":"<div><div>Bioceramic endodontic sealers may represent an alternative for post cementation, as they establish chemical bonding with dentin through interaction with hydroxyapatite. This study aimed to evaluate the push-out bond strength of prefabricated (P), customized (C), and single-adjustable (S) glass fiber posts luted with either a self-adhesive resin cement (U200) or an experimental bioceramic endodontic sealer (BC). Seventy-two endodontically treated premolars were divided into six groups (n = 12) according to the combination of post type and cement. The roots were sectioned into 1-mm-thick slices for push-out bond strength testing. Representative specimens were analyzed using SEM and EDS. Data were analyzed using three-way ANOVA and the Games-Howell test (α = 0.05). P-BC, C-BC, and S-BC exhibited significantly lower mean bond strengths at the cervical and middle thirds compared to the U200 groups (<em>p</em> < 0.05). P-U200 and S-U200 demonstrated higher bond strength than C-U200 at the cervical and middle thirds (<em>p</em> < 0.05). Posts luted with BC showed significantly lower bond strength than U200 (<em>p</em> < 0.05). SEM/EDS analysis revealed calcium hydroxide crystal deposition at the dentin/BC interface, while U200 specimens showed resin tags and signs of chemical interaction with dentin. The experimental bioceramic sealer was less effective than self-adhesive resin cement for cementing glass fiber posts. The single-adjustable post exhibited bond strength comparable to that of the prefabricated post, regardless of the cement type or root third. Therefore, single-adjustable glass fiber posts may serve as a viable and time-efficient alternative to customized posts for restoring flared root canals.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"145 ","pages":"Article 104211"},"PeriodicalIF":3.5,"publicationDate":"2025-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145518265","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}
The growing awareness of the environmental and health consequences associated with formaldehyde-based wood adhesives has prompted an urgent demand for alternative adhesive solutions. Lignocellulosic biomass derived from renewable sources such as agricultural residues offer a promising and sustainable solution as an alternative to formaldehyde-based wood adhesives. The objective of this study is to valorize the unexplored Moroccan argan shells by-product (AS), with the specific aim of maximizing its value in the formulation of wood adhesive. For this purpose, AS were subjected to chemical treatments, including hydrolysis to produce hydrolyzed argan shells (HAS) followed by phosphorylation giving as result phosphorylated hydrolyzed argan shells (P-HAS). The as-produced samples were characterized using scanning electron microscopy (SEM) and element mapping, Attenuated total reflectance-Fourier transform infrared spectroscopy (ATR/FT-IR), conductimetric titration, x-ray diffraction (DRX) and thermogravimetric analysis (TGA/DTG). Moreover, the effect of various HAS and P-HAS ratios on the mechanical properties of the ultimate particleboards, such as dry internal bond (IB), modulus of elasticity (MOE), modulus of rupture (MOR), and surface soundness (SS), was evaluated and compared to European standards. P-HAS improved the physical and mechanical properties of the particleboards. Our results showed enhanced, IB, MOE and MOR, while also reducing formaldehyde emissions. These finding prove that P-HAS can be a promising material for producing more sustainable and high-performance particleboards.
{"title":"Argan shell-derived phosphorylated lignocellulose: A sustainable pathway in wood adhesive formulation","authors":"Hafida Maarir , Yassine El Khayat Driaa , Hassan Charii , Abdelghani Boussetta , Nabil Grimi , Amine Moubarik","doi":"10.1016/j.ijadhadh.2025.104212","DOIUrl":"10.1016/j.ijadhadh.2025.104212","url":null,"abstract":"<div><div>The growing awareness of the environmental and health consequences associated with formaldehyde-based wood adhesives has prompted an urgent demand for alternative adhesive solutions. Lignocellulosic biomass derived from renewable sources such as agricultural residues offer a promising and sustainable solution as an alternative to formaldehyde-based wood adhesives. The objective of this study is to valorize the unexplored Moroccan argan shells by-product (AS), with the specific aim of maximizing its value in the formulation of wood adhesive. For this purpose, AS were subjected to chemical treatments, including hydrolysis to produce hydrolyzed argan shells (HAS) followed by phosphorylation giving as result phosphorylated hydrolyzed argan shells (P-HAS). The as-produced samples were characterized using scanning electron microscopy (SEM) and element mapping, Attenuated total reflectance-Fourier transform infrared spectroscopy (ATR/FT-IR), conductimetric titration, x-ray diffraction (DRX) and thermogravimetric analysis (TGA/DTG). Moreover, the effect of various HAS and P-HAS ratios on the mechanical properties of the ultimate particleboards, such as dry internal bond (IB), modulus of elasticity (MOE), modulus of rupture (MOR), and surface soundness (SS), was evaluated and compared to European standards. P-HAS improved the physical and mechanical properties of the particleboards. Our results showed enhanced, IB, MOE and MOR, while also reducing formaldehyde emissions. These finding prove that P-HAS can be a promising material for producing more sustainable and high-performance particleboards.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"145 ","pages":"Article 104212"},"PeriodicalIF":3.5,"publicationDate":"2025-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145518256","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}
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