International Journal of Adhesion and Adhesives最新文献

{"title":"Production and characterisation of novel sustainable composite particleboards from cellulosic waste of pineapple peduncles and hybrid tannin-epoxy adhesives","authors":"Achille Désiré Betené Omgba ,&nbsp;Benoit Ndiwe ,&nbsp;Laurent Libog ,&nbsp;Ahmed Belaadi ,&nbsp;Reine Elisabeth Onana ,&nbsp;Fidèle Sosthène Assoumou Olomo ,&nbsp;Liliane Nga ,&nbsp;Julien Clerc Obam ,&nbsp;Cheryle Manfouo Tchoupmene ,&nbsp;Christel Cédrig Laris Nsi Ongo ,&nbsp;Fabien Betené Ebanda ,&nbsp;Atangana Ateba ,&nbsp;Florian Martoïa ,&nbsp;Pierre J.J. Dumont","doi":"10.1016/j.ijadhadh.2025.104163","DOIUrl":"10.1016/j.ijadhadh.2025.104163","url":null,"abstract":"<div><div>The use of cellulosic agricultural residues and tannin-rich forestry waste for the production of particleboards offers a sustainable alternative to conventional construction materials. This study develops bio-based composite panels by combining particles derived from pineapple peduncles (containing 45.8–49.3 wt% cellulose) with a partially biobased hybrid adhesive composed of <em>Okan</em> tannin and epoxy resin. The peduncles were transformed into particles with high porosity (75.7 %), significant water absorption capacity (224.3 wt%) and moisture absorption (58.3 wt%). The tannin, extracted via maceration and evaporation, was characterised using ¹³C NMR spectroscopy and MALDI-TOF mass spectrometry, revealing a composition rich in flavonoids, carbohydrates, and phenolic acids, enhancing its interaction with the epoxy matrix. Panels were manufactured using two particle size ranges (600–1000 μm and 1000–1500 μm) and two adhesive formulations, namely a tannin-epoxy hybrid system (7.5 + 7.5 vol% and 10 + 10 vol%) and pure epoxy (15 and 20 vol%). These fractions were selected to ensure uniform impregnation of the lignocellulosic particles. Characterisation included gravimetric tests, mechanical testing (tensile, three-point bending, internal bonding, Charpy impact). Statistical analysis (ANOVA) confirmed that particle size and adhesive type significantly (<span><math><mrow><mi>p</mi><mo>&lt;</mo></mrow></math></span> 0.05) affect density, dimensional stability, and mechanical performance. The resulting panels exhibited moderate water absorption (<span><math><mrow><mo>&lt;</mo></mrow></math></span> 50 wt%), good dimensional stability, and robust mechanical properties (tensile strength: 48–50 MPa; flexural strength: 13–14.6 MPa; impact strength: 6–19 J cm⁻²; hardness: 90 ± 2 HC; internal bonding: 0.62–0.89 MPa), meeting the EN 312 standard requirements for P2-grade boards used in partitioning and furniture manufacturing. This work paves the way for the development of eco-friendly composites and the optimisation of bio-based hybrid adhesives in materials science.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"143 ","pages":"Article 104163"},"PeriodicalIF":3.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267431","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":"Experimental investigation of bio-inspired Bouligand-type CFRP adherends in adhesive joints under multi-rate and multi-directional tensile loading","authors":"Hossein Malekinejad ,&nbsp;Ricardo JC. Carbas ,&nbsp;Eduardo AS. Marques ,&nbsp;Lucas FM. da Silva","doi":"10.1016/j.ijadhadh.2025.104170","DOIUrl":"10.1016/j.ijadhadh.2025.104170","url":null,"abstract":"<div><div>This study explores the mechanical performance of adhesively bonded single-lap joints (SLJs) with composite adherends featuring various stacking sequences, including bio-inspired gradual Bouligand helicoidal (G), conventional helicoidal (H), unidirectional (UD), and quasi-isotropic (QI) configurations. Joints were tested under multi-directional (0°, 45°, 90°) and multi-rate tensile loading. A failure load envelope was developed, revealing that UD joints (known for its high stiffness) performed well in 0° loading but showed strong anisotropy at other angles. In contrast, G-type joints demonstrate superior multi-directional integrity, making them promising for applications with variable loading directions. These findings highlight the significance of stacking sequence in optimizing composite SLJ designs for structural applications. Since all joints demonstrated higher performance under tensile loading in the zero-direction, the study was extended to evaluate their behavior under multi-rate tensile testing. Correspondingly, while G- and H-type SLJs exhibited strength comparable to UD joints due to cohesive failure, they showed greater failure displacement and, consequently, higher energy absorption.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"143 ","pages":"Article 104170"},"PeriodicalIF":3.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267430","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":"Effectiveness of olive mill wastewater treatment in enhancing physicochemical properties of resin surfaces against bacterial adhesion","authors":"Oubid Ait lahbib ,&nbsp;Souad Lekchiri ,&nbsp;Taoufik Hakim ,&nbsp;Chorouk Zanane ,&nbsp;Hafida Zahir ,&nbsp;Mostafa El Louali ,&nbsp;Abdellatif Essoumhi ,&nbsp;Abdelilah El-Abbassi ,&nbsp;Hassan Latrache","doi":"10.1016/j.ijadhadh.2025.104169","DOIUrl":"10.1016/j.ijadhadh.2025.104169","url":null,"abstract":"<div><div>Resins are widely used as adhesives for coatings due to their mechanical, adhesive and strength properties. However, these polymers still have limited performance against bacterial adhesion, which poses a critical problem for healthcare facilities. Preventive strategies have therefore been developed to improve the antiadhesive activity of resin coating surfaces against bacterial adhesion. In this study, we evaluated the effectiveness of treating epoxy, acrylic and nitrocellulose resin surfaces with olive mill wastewater (OMW) to improve their surface properties against the adhesion of <em>Staphylococcus aureus</em> and <em>Pseudomonas aeruginosa</em>. The contact angle results showed that the relatively hydrophobic epoxy (θw = 71.4 ± 0.5°), acrylic (θw = 78.5 ± 1.8°) and nitrocellulose (θw = 87.4 ± 2.2°) were turned into relatively hydrophilic with increased electron donor (γ^–) character after OMW treatment, thus improving its physicochemical properties. In addition, the bacterial adhesion results showed that epoxy, acrylic and nitrocellulose surfaces treated with OMW had a significant anti-adhesion activity against <em>S. aureus</em> and <em>P. aeruginosa</em> adhesion, compared with untreated surfaces, as well as a good correlation was observed between the wettability and electron donor properties of resin surfaces and the bacterial coverage rate. These results provide insights into the development of effective, eco-friendly, and anti-adhesive resin surfaces against bacterial adhesion.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"143 ","pages":"Article 104169"},"PeriodicalIF":3.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145217855","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":"Comprehensive analysis of factors influencing the peel strength of EVA film","authors":"Cheng Hu ,&nbsp;Ruixiang Wang ,&nbsp;Xiaohong Li ,&nbsp;Jie Li ,&nbsp;Fengbo Sun ,&nbsp;Yao Li ,&nbsp;Xiaopeng Fan ,&nbsp;Tian Yang ,&nbsp;Chonglin Min ,&nbsp;Kang Li ,&nbsp;Yang Xu ,&nbsp;Qing Xiong","doi":"10.1016/j.ijadhadh.2025.104172","DOIUrl":"10.1016/j.ijadhadh.2025.104172","url":null,"abstract":"<div><div>Ethylene-vinyl acetate copolymer (EVA) can be used as a core adhesive in the manufacturing process of CIGS flexible thin film solar modules. To assess the adhesion properties of EVA, peel strength is often measured using a peel test. However, the peel strength test results are affected by various parameters of the peel test system, so the conditions under which the experiment was run must be fully described and properly analyzed to correctly assess the test results. We conducted a peel test of a composite film layer with EVA as the adhesive, considering the effects of peel angle, peel rate, and peel specimen width on the peel force. The experimental results indicate that under the same test conditions, the ratio of peel forces is approximately equal to the ratio of the widths of the peel specimens. The peel rate primarily affects the peel strength by influencing the viscoelastic response of EVA during the peel process, leading to a change in failure mode. Different peel angles result in different peel forces required to achieve the same interfacial toughness because the tensile stress component dominates at smaller angles, while the shear stress component dominates at larger angles.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"143 ","pages":"Article 104172"},"PeriodicalIF":3.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145217859","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 aluminum hydroxide on the physical, mechanical, and fire-resistant properties of Acacia mangium waste/polyurethane particleboards","authors":"Norazwani Muhammad Zain,&nbsp;Farizah Adliza Ghazali,&nbsp;Nur Azida Che Lah,&nbsp;Muhammad Hellmy Hussin","doi":"10.1016/j.ijadhadh.2025.104174","DOIUrl":"10.1016/j.ijadhadh.2025.104174","url":null,"abstract":"<div><div>The growing demand for sustainable materials has driven the use of agricultural residues, such as <em>Acacia mangium</em> waste, in composite particleboard production. These boards are widely utilized in furniture, construction, and packaging due to their affordability and versatility. However, high flammability limits their broader industrial application. This study investigates the incorporation of aluminum hydroxide (Al(OH)₃) as a fire-retardant filler in <em>Acacia mangium</em> waste/polyurethane-based particleboards. The objective was to evaluate how varying Al(OH)₃ concentrations affect the physical, mechanical, thermal, and fire-resistant properties of the composites. Acacia mangium waste-based particleboards were prepared with different Al(OH)₃ loadings 0–7.5 wt% Al(OH)₃ to improve fire resistance while maintaining physical and mechanical performance. Particleboards were tested for water absorption (WA), modulus of rupture (MOR), and modulus of elasticity (MOE). Thermogravimetric analysis (TGA) and limiting oxygen index (LOI) tests assessed thermal stability and fire retardancy. Results showed improved water resistance, with WA reduced to 11.2 %, and a maximum MOE of 5174.5 MPa at 6 % Al(OH)₃. However, MOR decreased from 23.6 MPa (0 wt% Al(OH)₃) to 18.5 MPa at 6 % Al(OH)₃., indicating a trade-off between stiffness and rupture strength. TGA revealed that the third-stage maximum mass-loss temperature increased from 349.01 °C (0 wt% Al(OH)₃) to 394.18 °C at 6 wt% (+45.17 °C) and to 410.28 °C at 7.5 wt% (+61.27 °C), indicating enhanced thermal stability. and 6 wt% formulation achieved a LOI of 23 %, meeting the slow-burn criterion. Statistical analysis (ANOVA and Tukey HSD) confirmed the significant influence of Al(OH)₃ on all properties. The findings highlight that 6 % Al(OH)₃ offers an optimal balance between mechanical integrity and fire resistance. This formulation meets international strength standards and provides enhanced durability, making it suitable for applications requiring both flame retardancy and moisture resistance.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"143 ","pages":"Article 104174"},"PeriodicalIF":3.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145266881","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":"Fracture behaviour analysis of a damaged plate repaired with a composite patch under thermal and water immersion conditions","authors":"Abderrahim Belhoucine ,&nbsp;Kouider Madani ,&nbsp;M. Benyettou ,&nbsp;R.D.S.G. Campilho ,&nbsp;Laid Rezgani ,&nbsp;Stephanie Mallarino ,&nbsp;Sebastien Touzain","doi":"10.1016/j.ijadhadh.2025.104154","DOIUrl":"10.1016/j.ijadhadh.2025.104154","url":null,"abstract":"<div><div>The use of adhesively bonded composite patches for structural repair has gained traction, particularly in the aerospace industry, due to their ability to reduce stress concentrations while minimizing weight. However, environmental exposure, particularly to moisture and temperature variations, can degrade adhesive and composite properties, affecting repair performance. This study presents an integrated experimental-numerical approach to evaluate the fracture behaviour of adhesively bonded repairs in aluminium plates exposed to harsh environmental conditions, specifically water immersion at different temperatures (20 °C and 40 °C). Although composite patches are widely used for structural aerospace repairs due to their lightweight and strength, their long-term durability under moisture and thermal effects remains insufficiently addressed. Thus, tensile tests were performed on adhesive and composite specimens subjected to different ageing periods, and the obtained properties were incorporated into a finite element model using the J-Integral to predict crack propagation. What distinguishes this study is the combined analysis of both adhesive and composite ageing effects on the performance of repaired structures, which is rarely investigated in literature. Moreover, composite and metallic patches under identical degradation conditions are compared to evaluate the long-term repair effectiveness. Results demonstrate that composite patches perform better in unaged conditions, while aluminium patches exhibit superior durability under prolonged environmental exposure.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"143 ","pages":"Article 104154"},"PeriodicalIF":3.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099412","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":"Box-Behnken optimization of the atmospheric-pressure air plasma treatment on the bonding performance of aluminum 5754 joints","authors":"Mehmet Çağan Sarı ,&nbsp;Batuhan Kayhan ,&nbsp;Oktay Kemah ,&nbsp;Ege Anıl Diler ,&nbsp;Onur Ertuğrul","doi":"10.1016/j.ijadhadh.2025.104150","DOIUrl":"10.1016/j.ijadhadh.2025.104150","url":null,"abstract":"<div><div>This study investigated the effects of atmospheric-pressure air plasma treatment parameters on the surface properties and adhesive bonding strength of aluminum 5754 alloy single-lap joints, using Loctite 401 cyanoacrylate adhesive. A Box-Behnken design was employed to optimize plasma frequency, power, and time, focusing on their impact on surface wettability and lap-shear strength. Surface characterization was performed using contact angle measurements and X-ray Photoelectron Spectroscopy (XPS). The results showed that both contact angle and shear strength were significantly influenced by atmospheric-pressure air plasma treatment parameters of frequency, power, and time, as well as their quadratic and interaction terms. The lowest contact angle of 16.6°, indicating a high wettability, was achieved at optimal parameters (1250 Hz, 200 W, 60 s) due to the removal of hydrocarbon contamination and the formation of oxygen-containing groups. Correspondingly, lap-shear strength exhibited a remarkable increase, ranging from 35% to approximately 400% compared to untreated sample. The highest shear strength of 9.345 MPa was also obtained at 1250 Hz, 200 W, and 60 s. It was observed that optimized plasma treatment changed the failure mode from adhesive to cohesive dominance, signifying improved interfacial bond strength. Higher cohesive failure ratios correlated directly with increased shear strength, indicating optimal plasma parameters create stronger, more reliable bonds. These findings underscore the efficacy of atmospheric-pressure air plasma treatment in optimizing surface properties for enhanced adhesive bonding of Al5754 alloys in demanding applications.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"143 ","pages":"Article 104150"},"PeriodicalIF":3.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099925","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":"Investigation of the differences in the lap-shear strengths of sulphuric acid anodised aluminium alloy AA6060-T6 joints bonded with hot and cold cure adhesives","authors":"Ben Robinson ,&nbsp;Junia Cristina Avelar-Batista Wilson ,&nbsp;Antonia Borissova ,&nbsp;Gerhart Goltz","doi":"10.1016/j.ijadhadh.2025.104173","DOIUrl":"10.1016/j.ijadhadh.2025.104173","url":null,"abstract":"<div><div>The automotive industry is becoming increasingly reliant on adhesives for joining components, due to their versatile applications and high-performing mechanical properties. Conventional adhesives are one-part, epoxy-based systems that require a high-temperature cure (180°C–200 °C), resulting in a substantial energy consumption and restricting the variety of materials that can be bonded. These drawbacks can be eliminated through adopting cold-cure adhesives (<span><math><mrow><mo>∼</mo></mrow></math></span> 20 °C), however these adhesives lack the high-performing mechanical properties of their hot-cure counterparts. Addressing this, the differences in structure and chemistry between hot and cold curing adhesives were investigated, focusing on bonding anodised aluminium joints. The structure of the bonding interface was analysed using Scanning Electron Microscopy (SEM), whereas the chemistry involved was determined through Fourier Transform InfraRed (FT-IR) and X-ray Photoelectron Spectroscopy (XPS). Lap-shear results showed that significant adhesion was achieved between the aluminium oxide coating and the hot- and cold-cure adhesives. The cold-cure adhesive was found to contain 10.6 % fewer hydroxyl groups at the bonding interface. Functional bonding groups corresponding to aluminium silicate bonds were detected at interface of anodised aluminium joints bonded with cold cure adhesives, but these bonds were absent at interface of joints bonded with the hot cure adhesive. Although differences in functional bond groups were found to exist at the interface between the anodised aluminium and cold or hot cure adhesives, all tested lap-shear joints exhibited cohesive failure regardless of the adhesive being hot or cold curing. Results from this investigation indicates that the lower lap-shear performance of anodised joints bonded with the cold cure adhesive compared to those bonded with the hot cure adhesive stems from differences in the bulk properties of the adhesives themselves, suggesting that the cold cure adhesives have inferior mechanical bulk properties compared to the hot cure adhesive.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"143 ","pages":"Article 104173"},"PeriodicalIF":3.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267432","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":"Development of bio-based hempseed protein adhesives with enhanced properties and performance via glyoxal and zinc chloride modification","authors":"Roselle Barretto ,&nbsp;Guangyan Qi ,&nbsp;Bipin Rajpurohit ,&nbsp;Christopher Jones ,&nbsp;Xiuzhi S. Sun ,&nbsp;Yonghui Li ,&nbsp;Donghai Wang","doi":"10.1016/j.ijadhadh.2025.104165","DOIUrl":"10.1016/j.ijadhadh.2025.104165","url":null,"abstract":"<div><div>Formaldehyde-based adhesives currently dominate the global market, representing over 70 % of the total adhesive usage. However, these synthetic adhesives pose significant health concerns and environmental concerns. In response, this study explores hempseed protein as a viable alternative for creating bio-based adhesives suitable for plywood applications. Hempseed flour was defatted and processed to extract proteins. Adhesive slurries were prepared with 15 % protein concentration through pH adjustment and controlled mixing. The study employed chemical modifiers such as glyoxal and zinc chloride (ZnCl₂), both individually and in combination, to enhance the adhesive's strength, thermal stability, and water resistance. Adhesion tests on cherry wood veneers revealed that all modifiers, particularly glyoxal, significantly improved the dry, wet, and soaked strength, achieving maximum values of 5.69 MPa, 2.68 MPa, and 4.91 MPa, respectively. ZnCl₂ contributed to performance enhancements through ionic crosslinking, yielding moderate improvements in strength and stability. However, combined treatments showed limited synergy effects between covalent and ionic crosslinking mechanisms. Glyoxal notably enhanced thermal stability with onset and denaturation temperatures increasing to 146.34 °C and 147.74 °C, respectively. SEM revealed that glyoxal produced denser, more compact adhesive networks, whereas ZnCl₂ led to more moderate structural improvements. These findings demonstrated the potential of glyoxal-modified hempseed protein adhesives for engineered wood applications, offering a promising avenue toward sustainable technologies. Furthermore, ZnCl₂ allows for flexible formulations, enhancing the overall utility of these bio-based adhesives.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"143 ","pages":"Article 104165"},"PeriodicalIF":3.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156059","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":"Transition from thermoplastic to thermosetting for bio-based polyurethane modified asphalt","authors":"Guoqiang Sun ,&nbsp;Ruiqing Sun ,&nbsp;Mingjun Hu ,&nbsp;Chen Yang ,&nbsp;Guangchen Wang ,&nbsp;Ting Ma","doi":"10.1016/j.ijadhadh.2025.104176","DOIUrl":"10.1016/j.ijadhadh.2025.104176","url":null,"abstract":"<div><div>The utilization of bio-based materials reduced reliance on petroleum-derived products and promotes sustainable development in road engineering. The performance of bio-based polyurethane (BPU) modified asphalt (BPUMA) prepared from renewable castor oil (CO) was significantly affected by the BPU content and exhibited complex transition from thermoplastic to thermosetting. This study systematically investigated this transition by examining the relationship between BPUMA performance and BPU content. Through softening point test and 5 °C ductility test, the optimal hydroxyl group substitution ratio of CO to polytetrahydrofuran was determined to be 50 %. The morphology observation of BPUMA samples showed that when the BPU content increased to 37.5 %, the BPU phase shifted from dispersed to continuous. As the BPU content rose to 55 %, the BPU network density was significantly improved, and the ability of BPUMA to resist thermal deformation was greatly enhanced. The physical properties analysis indicated that when the BPU content increased from 35 % to 37.5 %, the softening point of BPUMA grew from 89.3 °C to the measurable limit (&gt;150 °C). Meanwhile, the low-temperature ductility of BPUMA exhibited a trend of first increasing and then stabilized at 36–42 cm once BPU content exceeded 35 %. The multiple stress creep recovery test data confirmed that 37.5 % was the key content for BPUMA to undergo the first transition from thermoplastic to thermosetting. When BPU content exceeded 50 %, even at an elevated temperature of 94 °C, the elastic recovery rate of BPUMA was close to 100 %, while the irrecoverable creep compliance asymptotically tended toward zero, indicating that BPUMA completed a thorough transition to thermosetting performance above 50 %. The linear amplitude sweep test results further revealed that BPUMA began to undergo the first transition at the BPU content of around 37.5 %, and completed the second transition above 50 %. In summary, the BPUMA after transition exhibited extremely excellent road anti-rutting and anti-cracking performance, and was expected to be applied as sustainable long-life pavement binder.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"143 ","pages":"Article 104176"},"PeriodicalIF":3.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145324826","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}