International Journal of Adhesion and Adhesives最新文献_第4页

Evaluating the effects of Kraft and Hydroxymethylated lignin on particleboard performance and environmental impact 评价硫酸盐和羟甲基木质素对刨花板性能和环境影响的影响

IF 3.5 3区材料科学 Q2 ENGINEERING, CHEMICAL

International Journal of Adhesion and Adhesives

Pub Date : 2025-12-12 DOI: 10.1016/j.ijadhadh.2025.104249

Anass Ait Benhamou, Ingrid Calvez, Véronic Landry

In this study we investigate the effects of two industrial lignins, Kraft (KL) and hydroxymethylated lignin (HL), on the physicochemical properties of urea-formaldehyde (UF) adhesives and the performance of bonded particleboards. KL and HL were used to partially replace up to 15 wt% of UF adhesives, increasing viscosity beyond industrial requirements but enhancing internal bond strength. The curing peak temperature decreased from 84.3 °C (UF) to 83.3 °C (UF–5 % HL), while the heat of curing rose from 86.8 J/g to 107.5 J/g, confirming enhanced reactivity over KL. Mechanical performance improved notably, with the best results obtained for panels containing 10 wt% KL and 5 wt% HL, showing MOE, MOR, and IB increases of 38.4 %, 12.3 %, and 30.3 %, respectively, relative to control panels. Formaldehyde emissions were significantly reduced from 0.174 ppm for neat UF to 0.094 ppm for UF–15 % KL, approaching the Canadian regulatory limit. Despite viscosity challenges associated with both lignins, these findings highlight its potential as a bio-based UF adhesive modifier, offering enhanced performance and reduced formaldehyde emissions. Further optimization is required to lower HL's molecular weight and ensure industrial feasibility. This research provides a pathway for lignin valorization in sustainable wood composites, advancing eco-friendly alternatives for the forest products industry.

在本研究中，我们研究了两种工业木质素，Kraft （KL）和羟甲基化木质素（HL），对脲醛（UF）胶粘剂的物理化学性能和粘合刨花板性能的影响。KL和HL用于部分替代高达15%的UF胶粘剂，增加粘度超出工业要求，但提高了内部粘合强度。固化峰值温度从84.3°C （UF）下降到83.3°C (UF - 5% HL)，固化热从86.8 J/g上升到107.5 J/g，证实了反应性比KL增强，力学性能显著提高，其中含有10 wt% KL和5 wt% HL的面板效果最好，MOE、MOR和IB分别比对照面板提高了38.4%、12.3%和30.3%。甲醛排放量从纯UF的0.174 ppm显著降低到UF - 15% KL的0.094 ppm，接近加拿大监管限值。尽管这两种木质素都存在粘度问题，但这些发现强调了它作为生物基UF粘合剂改进剂的潜力，可以提高性能并减少甲醛排放。需要进一步优化以降低HL的分子量并确保工业可行性。这项研究为木质素在可持续木材复合材料中的增值提供了一条途径，为林产品工业提供了生态友好的替代品。

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引用次数: 0

Fabrication and adhesion properties of fully aliphatic multiblock waterborne polyurethanes with crosslinked structures 交联结构全脂肪族多嵌段水性聚氨酯的制备及粘接性能

IF 3.5 3区材料科学 Q2 ENGINEERING, CHEMICAL

International Journal of Adhesion and Adhesives

Pub Date : 2025-12-09 DOI: 10.1016/j.ijadhadh.2025.104246

Jinshu Liu , Wenzhao Shi , Hongjuan Zhou , Zhe Yang , Junjie Cui , Chao-Qun Ma , Jing Zhang , Xinqing Zhang

Waterborne polyurethane (WPU) adhesives play a crucial role in replacing solvent-based adhesives and promoting sustainable development across various sectors. Herein, a multiblock WPU adhesive with a crosslinked structure was successfully synthesized by the prepolymer dispersion method. The soft segment utilized was hydroxyl-terminated aliphatic polyester poly(neopentylene adipate), while isophorone diisocyanate and ethylene diamine served as the hard segments. Dimethylol propionic acid acted as the hydrophilic donor, and trimethylol propane (TMP) functioned as the cross-linking agent. The properties of the WPU adhesives prepared with varying TMP contents were compared. The results indicated that incorporating TMP significantly diminished hydrogen bonding interactions within the WPU matrix and enhanced both roughness and microphase separation of the WPU membrane. Furthermore, when compared to linear WPUs, the synthesized WPU adhesive exhibited remarkable tensile strength along with resistance to water, solvents, alkalis, and extreme temperatures. Notably, its t-peel strength reached 2.00 kN/m while lap shear strength attained 1.04 MPa. The development of this cross-linked structure in WPU adhesives establishes a scientific foundation for advancing environmentally sustainable adhesive applications in practice.

水性聚氨酯胶粘剂在取代溶剂型胶粘剂和促进各行业可持续发展方面发挥着至关重要的作用。本文采用预聚体分散法制备了具有交联结构的多嵌段WPU胶粘剂。软段为端羟基脂肪族聚酯聚己二酸新戊二烯，硬段为异佛尔酮二异氰酸酯和乙二胺。二甲基丙酸为亲水性给体，三甲基丙烷（TMP）为交联剂。比较了不同TMP含量制备的WPU胶粘剂的性能。结果表明，TMP的加入显著降低了WPU基质内的氢键相互作用，增强了WPU膜的粗糙度和微相分离。此外，与线性WPU相比，合成的WPU粘合剂具有显著的抗拉强度以及耐水、溶剂、碱和极端温度的能力。其中t型剥离强度达到2.00 kN/m，搭接抗剪强度达到1.04 MPa。这种交联结构在WPU胶粘剂中的发展为推进环境可持续胶粘剂的实际应用奠定了科学基础。

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引用次数: 0

Multi-scale evaluation of SBR modified asphalt/RCA interface under chloride erosion: toward eco-efficient pavement materials 氯化物侵蚀下SBR改性沥青/RCA界面的多尺度评价——面向生态高效路面材料

IF 3.5 3区材料科学 Q2 ENGINEERING, CHEMICAL

International Journal of Adhesion and Adhesives

Pub Date : 2025-12-08 DOI: 10.1016/j.ijadhadh.2025.104247

Jiahao Zhang , Rongtao Wei , Yahong Ding , Yongqi Guo , Ying Zhang

The widespread use of deicing salts in cold climates accelerates chloride-induced deterioration at the asphalt/RCA interface. To enhance chloride resistance while promoting resource circularity, this study combines styrene butadiene rubber-modified asphalt (SBRMA) with recycled concrete aggregate (RCA) to interrogate interfacial adhesion in chloride-rich environments. A multiscale experimental and simulation approach, including pull off and boiling tests, scanning electron microscopy (SEM), and molecular dynamics (MD) simulations, was employed to quantify adhesion and damage evolution under chloride erosion. Results showed that the addition of SBR reduced the stripping rate in chloride-rich environments from 29.12 % to 13.94 % and increased the interfacial bond strength from 0.31 MPa to 0.56 MPa. SEM observations revealed improved interfacial continuity and decreased microcrack density. MD simulations demonstrated that SBR chains enhance interfacial binding energy through anchoring and barrier effects, increase molecular packing density, and effectively inhibit chloride ion penetration. These findings confirm that the SBRMA and RCA composite can significantly delay chloride induced interfacial damage, providing mechanistic insights and technical support for the development of sustainable and salt resistant pavement materials for cold region applications.

在寒冷的气候条件下，除冰盐的广泛使用加速了氯化物在沥青/RCA界面引起的劣化。为了增强抗氯性，同时促进资源循环，本研究将丁二烯橡胶改性沥青（SBRMA）与再生混凝土骨料（RCA）结合起来，研究富氯环境下的界面附着力。采用多尺度实验和模拟方法，包括拉断和沸腾测试，扫描电子显微镜（SEM）和分子动力学（MD）模拟，量化了氯化物侵蚀下的粘附和损伤演变。结果表明，SBR的加入使富氯化物环境下的汽提率从29.12%降低到13.94%，界面结合强度从0.31 MPa提高到0.56 MPa。扫描电镜观察显示界面连续性改善，微裂纹密度降低。MD模拟表明，SBR链通过锚定和势垒效应提高界面结合能，增加分子堆积密度，有效抑制氯离子渗透。这些研究结果证实，SBRMA和RCA复合材料可以显著延缓氯化物引起的界面损伤，为开发可持续和耐盐的寒冷地区路面材料提供了机制见解和技术支持。

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引用次数: 0

Influence of wood species and pine extractives on the curing behaviour of pMDI 木材种类和松木提取物对pMDI固化性能的影响

IF 3.5 3区材料科学 Q2 ENGINEERING, CHEMICAL

International Journal of Adhesion and Adhesives

Pub Date : 2025-12-07 DOI: 10.1016/j.ijadhadh.2025.104248

Pia Solt-Rindler , Hendrikus W.G. van Herwijnen , Roland Mitter , Johannes Konnerth

This study investigates the influence of wood species, moisture content, and pine extractives on the curing behaviour and bond strength development of polymeric methylene diphenyl diisocyanate (pMDI) adhesives. Veneers of pine, spruce, birch, and beech were bonded with pMDI under controlled moisture conditions (8 %, 12 %, 16 %) and varying press pressures (1.5 and 2.7 N/mm²) to evaluate species-specific bonding behaviour using an adapted tensile shear strength test setup. Pine exhibited superior bond strength and rapid curing, attributed to both its anatomical features and the presence of abietane-type resin acids. Gas chromatography analysis confirmed the dominance of reactive diterpenoids, particularly abietic and neoabietic acid, in pine extractives. The removal of these compounds significantly reduced bond strength, while their reapplication to other species, notably beech, substantially improved bonding performance. The results suggest that certain extractives may contribute positively to pMDI bonding under specific conditions, expanding the understanding of their role in adhesive interactions. These insights may inform improved bonding strategies and the development of more efficient, formaldehyde-free wood composites.

本研究考察了木材种类、含水率和松木提取物对聚亚甲基二苯基二异氰酸酯（pMDI）胶粘剂固化行为和粘结强度发展的影响。将松木、云杉、桦木和山毛榉的单板在控制湿度条件（8%、12%、16%）和不同的压力（1.5和2.7 N/mm2）下与pMDI粘合，使用适应的拉伸剪切强度测试装置评估物种特异性粘合行为。松木具有优异的粘结强度和快速固化，这是由于松木的解剖特征和松木中存在的枞烷型树脂酸。气相色谱分析证实了活性二萜，特别是松木酸和新松木酸在松木提取物中占主导地位。去除这些化合物会显著降低键合强度，而将它们重新应用于其他物种，尤其是山毛榉，会显著提高键合性能。结果表明，某些萃取物可能在特定条件下对pMDI键合有积极作用，从而扩大了对其在粘合相互作用中的作用的理解。这些见解可以为改进粘合策略和开发更高效、无甲醛的木材复合材料提供信息。

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引用次数: 0

Effect of delivery mode on bond strength of a self-adhesive resin cement 输送方式对自粘树脂水泥粘结强度的影响

IF 3.5 3区材料科学 Q2 ENGINEERING, CHEMICAL

International Journal of Adhesion and Adhesives

Pub Date : 2025-12-04 DOI: 10.1016/j.ijadhadh.2025.104232

Karina Felix Santos , Renan Vinícius Granzotto Pinheiro , Raul Santos da Silva , Carlos Eduardo Francci , Lucas Hian da Silva , Paulo Francisco Cesar

This study evaluated the effect of different delivery modes of a self-adhesive resin cement on bond strength to dentin and first-generation zirconia (3Y-TZP). Six experimental groups were established according to the delivery mode used for manipulating the resin cement: a) HT, self-mixing with a helical tip; b) TT-MC, self-mixing with a T-mixer tip; c) TT-MIO, self-mixing with a T-mixer tip associated with a plastic intraoral tip; d) TT-FN, self-mixing with a T-mixer tip associated with a metal intraoral tip; e) PH-MIO, self-mixing with a helical tip associated with a plastic intraoral tip; and f) Manual (control), hand mixing on a mixing block with a metal spatula. 3Y-TZP blocks (6 × 6 × 3 mm; n = 120) and dentin blocks (4-mm thickness; n = 120) were prepared, and four tubes (0.76 mm in diameter and 1 mm in height) filled with resin cement manipulated according to each delivery mode were bonded to each substrate. Microshear bond strength was tested at a crosshead speed of 0.5 mm/min after 24 h and 1 month of water storage. Failure modes were evaluated under a stereomicroscope. Bond strength data were analyzed using two-way ANOVA to assess the effects of delivery mode and storage time. Failure mode distribution was evaluated using the chi-square test. For dentin, delivery mode did not influence bond strength after 24 h. After 1 month of storage, the HT group (4.2 ± 2.6 MPa) showed significantly higher bond strength than the Manual group (0.6 ± 0.5 MPa). Except for HT and Manual, storage time did not affect bond strength values for the other delivery modes. For the ceramic substrate (3Y-TZP), after 24 h the TT-FN group (7.5 ± 1.8 MPa) showed significantly higher bond strength than the group without an accessory tip, TT-MC (4.4 ± 1.7 MPa). After 1 month, storage time significantly affected bond strength for the HT (3.8 ± 1.5 MPa) and TT-FN (4.5 ± 2.6 MPa) groups. Both delivery mode and storage time influenced the bonding performance of the self-adhesive resin cement in a substrate-dependent manner. In general, automated mixing improved long-term bond strength, particularly to dentin, highlighting the importance of selecting an appropriate delivery system for durable adhesion.

本研究评估了不同递送方式的自粘树脂水泥对牙本质和第一代氧化锆（3Y-TZP）结合强度的影响。根据操纵树脂水泥的输送方式，建立了6个实验组：a) HT，螺旋尖端自混合；b) TT-MC，带有t型混合器尖端的自混合；c) TT-MIO，使用与塑料口内尖端相连接的t型混合器尖端进行自混合；d) TT-FN自混合，t型混合器尖端与金属口内尖端相连接；e) PH-MIO，自混合，螺旋尖端与塑料口内尖端相连接；f)手动（控制），用金属抹刀在搅拌块上手动搅拌。制备3Y-TZP块（6 × 6 × 3 mm, n = 120）和牙本质块（4 mm厚度，n = 120），并将4根直径0.76 mm，高度1mm的树脂水泥填充管根据不同的输送方式粘合到每个基材上。在蓄水24 h和1个月后，以0.5 mm/min的十字头速度测试微剪切粘结强度。在体视显微镜下评估失效模式。采用双向方差分析方法对粘结强度数据进行分析，以评估递送方式和储存时间的影响。失效模式分布采用卡方检验评估。对于牙本质，递送方式对24h后的结合强度没有影响。保存1个月后，HT组（4.2±2.6 MPa）的结合强度明显高于Manual组（0.6±0.5 MPa）。除了HT和Manual外，储存时间对其他交付方式的粘结强度值没有影响。对于陶瓷基板（3Y-TZP）， 24 h后，TT-FN组（7.5±1.8 MPa）的结合强度明显高于没有附加尖端的TT-MC组（4.4±1.7 MPa）。1个月后，HT组（3.8±1.5 MPa）和TT-FN组（4.5±2.6 MPa）的粘接强度受储存时间影响显著。输送方式和贮存时间对自粘树脂水泥的粘接性能影响与基材有关。一般来说，自动混合提高了长期粘合强度，特别是对牙本质，突出了选择合适的输送系统持久粘合的重要性。

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引用次数: 0

Experimental investigation on the multi-failure coupling strength mechanism of the hybrid Steel/GFRP adhesive joint 钢/玻璃钢复合粘结接头多次破坏耦合强度机理试验研究

IF 3.5 3区材料科学 Q2 ENGINEERING, CHEMICAL

International Journal of Adhesion and Adhesives

Pub Date : 2025-12-03 DOI: 10.1016/j.ijadhadh.2025.104243

Wenjing Zhao , Libin Duan , Weilai Tao , Xing Liu , Chengji Rong , Haiyang Zheng , Debiao Lu

The damage of a bi-material adhesive joint generally involves multiple failure modes, such as the fracture in the adhesive layer and the delamination on the different interfaces. The different combinations of these multiple failure modes generate various macro strengths of the adhesive joint, so the common strength criterion with an assumed single mode is normally limited to predict the damage. Therefore, it's necessary to present test and fracture strength identification methods for all possible failure modes in the adhesive joint. In this work, two kinds of materials – uniform thickness steel plates (UT) and orthogonal woven glass fibre reinforced plastics (GFRP) were used to prepare three types of single-lap shear specimens – UT/UT, GFRP/GFRP and UT/GFRP. With these specimens, firstly, the double-side gluing was found to have higher strength than that of the single-side gluing in both UT/UT and GFRP/GFRP specimens. Secondly, with different pre-crack positions, in total three kinds of failure modes in these adhesive joints have been activated and identified, which are the interface failure on the steel (strength: 21.0 MPa), the adhesive failure (strength: 16.0 MPa) and the interface failure on the GFRP (strength: 10.7 MPa). Finally, it is found that the macro shear strength of the hybrid UT/GFRP adhesive joint could be estimated by the sum of the independent shear strengths of each happened failure multiplied by their corresponding area percentages, which is the quantitative multi-failure coupling strength mechanism of the hybrid Steel/GFRP adhesive joint. This coupling mechanism would be applied for precisely predicting the strength of the bi-material adhesive joint.

双材料粘接接头的损伤通常包含多种破坏模式，如粘接层断裂和不同界面上的分层。多种破坏模式的不同组合会产生不同的粘接宏观强度，因此通常采用假定单一模式的常用强度准则来预测损伤是有限的。因此，有必要针对粘接中各种可能的破坏模式提出试验和断裂强度识别方法。本文采用均厚钢板（UT）和正交编织玻璃纤维增强塑料（GFRP）两种材料，分别制备了UT/UT、GFRP/GFRP和UT/GFRP三种单搭剪试件。通过这些试件，首先发现在UT/UT和GFRP/GFRP试件中，双面粘接强度均高于单面粘接强度；其次，在不同的预裂纹位置，激活并识别了粘结接头的三种破坏模式，即钢的界面破坏（强度：21.0 MPa）、粘结破坏（强度：16.0 MPa）和GFRP的界面破坏（强度：10.7 MPa）。最后，发现UT/GFRP粘接接头的宏观抗剪强度可由每次发生破坏的独立抗剪强度之和乘以其对应的面积百分比来估计，这是钢/GFRP粘接接头的定量多破坏耦合强度机制。该耦合机制可用于双材料粘接接头强度的精确预测。

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引用次数: 0

Decomposition of adhesive thin polydopamine films by alkaline solutions: influence on nano-topography and zeta potential 碱性溶液分解黏附聚多巴胺薄膜：对纳米形貌和zeta电位的影响

IF 3.5 3区材料科学 Q2 ENGINEERING, CHEMICAL

International Journal of Adhesion and Adhesives

Pub Date : 2025-12-02 DOI: 10.1016/j.ijadhadh.2025.104241

Ralf Frenzel , Astrid Drechsler , Frank Simon , Alla Synytska , Cordelia Zimmerer

Thin films of auto-oxidized dopamine, the so-called polydopamine (PDA), have been introduced as universal bio-inspired “green” adhesion promoter for a variety of applications. This study investigates the effect of different alkaline solutions on PDA films on polyethylene fibers over a time ranging from 1 h to 67 days. On one hand, this supports the application of adhesive PDA films in alkaline media such as cementitious matrices. On the other hand, a controlled chemical decomposition or degradation can be used to reverse adhesion and separate the components of PDA-mediated composite materials for re-use and recycling. The effect of the surface modification and the alkaline treatments was studied using atomic force microscopy, electrokinetic measurements, and spectroscopic techniques. Depending on the composition of the alkaline solution, a progressive dissolution or depolymerization of PDA aggregates was observed. Zeta potential measurements detected, however, acidic groups on the fiber surface even after alkaline treatment for 67 days, indicating that the PDA film was not fully removed.

自氧化多巴胺薄膜，即所谓的聚多巴胺（PDA），已被引入作为通用的仿生“绿色”粘附促进剂，用于各种应用。本研究考察了不同碱性溶液对聚乙烯纤维PDA膜的影响，时间范围为1小时至67天。一方面，这支持了粘合剂PDA薄膜在碱性介质（如胶凝基质）中的应用。另一方面，受控的化学分解或降解可用于逆转粘附并分离pda介导的复合材料的组分，以便重新使用和回收。利用原子力显微镜、电动力学测量和光谱技术研究了表面改性和碱性处理的效果。根据碱性溶液的组成，观察到PDA聚集体的逐渐溶解或解聚。然而，Zeta电位测量发现，即使在碱性处理67天后，纤维表面仍有酸性基团，这表明PDA膜并未完全去除。

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引用次数: 0

Molecular dynamics simulation of the effect of nanomaterial dimensions on the mechanical properties of epoxy adhesives 纳米材料尺寸对环氧胶粘剂力学性能影响的分子动力学模拟

IF 3.5 3区材料科学 Q2 ENGINEERING, CHEMICAL

International Journal of Adhesion and Adhesives

Pub Date : 2025-12-02 DOI: 10.1016/j.ijadhadh.2025.104240

Bin Yang, Xiaowan Ma, Yuhong Liu, You Li

Nanomaterials may significantly improve the mechanical properties of epoxy adhesives, but the mechanisms by which nanomaterial size affects this enhancement remain unclear. This study uses molecular dynamics simulations to investigate how nanomaterial size influences the mechanical properties of epoxy adhesives at the microscale. Using molecular dynamics software, we constructed models of epoxy adhesives modified with SiO₂ nanoparticles of different radii (10 Å, 11.25 Å, 12.5 Å, 13.75 Å) and carbon nanotubes with varying aspect ratios (4.53, 5.44, 6.35). We analyzed key parameters, including glass transition temperature, mechanical properties, free volume, mean square displacement, and interaction energy to evaluate how SiO₂ radius and carbon nanotube aspect ratio affect epoxy adhesive performance. The results revealed that as SiO₂ radius increased, the glass transition temperature (Tg) of the modified epoxy adhesive first decreased, then slightly increased beyond a certain threshold, but overall exhibited a declining trend. Mean square displacement rose with SiO₂ radius, whereas interaction energy peaked and then declined as the radius increased. In carbon nanotube-modified epoxy adhesives, higher aspect ratios resulted in elevated Tg but reduced mean square displacement and interaction energy. These findings elucidate how nanomaterial size affects the glass transition temperature of epoxy adhesives, providing theoretical insights into enhancing adhesive strength and toughness by modifying nanomaterial dimensions, and contributing to the design of high-performance adhesives.

纳米材料可以显著改善环氧胶粘剂的机械性能，但纳米材料尺寸影响这种增强的机制尚不清楚。本研究采用分子动力学模拟研究纳米材料尺寸对环氧胶粘剂微观力学性能的影响。利用分子动力学软件，我们构建了不同半径的SiO2纳米颗粒（10 Å， 11.25 Å， 12.5 Å， 13.75 Å）和不同长径比的碳纳米管（4.53,5.44,6.35）改性环氧胶粘剂模型。我们分析了玻璃化转变温度、力学性能、自由体积、均方位移和相互作用能等关键参数，以评估SiO2半径和碳纳米管长径比对环氧胶粘剂性能的影响。结果表明：随着SiO2半径的增大，改性环氧胶粘剂的玻璃化转变温度（Tg）先降低，再略微升高，超过一定阈值后，总体呈下降趋势；均方位移随SiO2半径增大而增大，而相互作用能随SiO2半径增大而先达到峰值后减小。在碳纳米管改性环氧胶粘剂中，较高的长径比导致Tg升高，但均方位移和相互作用能降低。这些发现阐明了纳米材料尺寸如何影响环氧胶粘剂的玻璃化转变温度，为通过改变纳米材料尺寸来提高胶粘剂的强度和韧性提供了理论见解，并有助于高性能胶粘剂的设计。

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引用次数: 0

Natural resin-derived adhesives for sticky insect traps: Development and field evaluation in mustard and okra 粘虫诱捕用天然树脂粘合剂：芥菜和秋葵的开发和现场评价

IF 3.5 3区材料科学 Q2 ENGINEERING, CHEMICAL

International Journal of Adhesion and Adhesives

Pub Date : 2025-12-02 DOI: 10.1016/j.ijadhadh.2025.104244

Nandkishore Thombare , A. Mohanasundaram , Kewal Krishan Sharma

This study reports the development of eco-friendly, non-drying adhesives for sticky insect traps from natural lac resin. The lac was chemically modified to bleached hydrolyzed lac (HL), which served as the adhesive base, and this synthesis was optimized through alkaline hydrolysis and in situ bleaching. The HL was blended with co-formulants, including dewaxed-decolorized lac (DDL), castor oil, essential oils (basil and mustard), and diluents, to enhance tackiness and insect attraction. The formulations were evaluated for viscosity, acid value, FTIR, and adhesive strength, and compared with the commercial glue, Chipku. Field trials in mustard and okra using yellow cylindrical traps showed that HL-DDL formulations captured 254–263 sucking pests per trap (aphids, thrips, whiteflies) with 84.6–86.2 % efficacy compared to Chipku. The resin-based glues were odorless, safe, and suitable for organic farming. This is the first report on hydrolyzed lac adhesives for agricultural pest control, offering a green alternative to synthetic glues.

本研究报告了以天然紫胶树脂为原料，开发环保、不干燥的粘虫诱捕剂。对紫胶进行了化学改性，得到了漂白水解紫胶（HL）作为胶粘剂，并通过碱水解和原位漂白对其合成进行了优化。HL与包括脱蜡脱色紫胶（DDL）、蓖麻油、精油（罗勒和芥末）和稀释剂在内的共制剂混合，以增强粘性和吸引昆虫。对配方的粘度、酸值、FTIR和粘接强度进行了评估，并与商用胶水Chipku进行了比较。用黄色筒形诱捕器对芥菜和秋葵进行田间试验表明，HL-DDL制剂每个诱捕器捕获254 ~ 263只吸虫（蚜虫、蓟马、粉虱），与Chipku相比，其有效性为84.6 ~ 86.2%。树脂基胶水无味，安全，适合有机农业。这是第一次报道水解紫胶用于农业害虫防治，提供了一个绿色的替代合成胶。

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引用次数: 0

Evaluation of the anticorrosive effectiveness of an epoxy coating applied to galvanized steel treated with a silane hybrid film incorporating a natural corrosion inhibitor 用含天然缓蚀剂的硅烷杂化膜处理镀锌钢，评价环氧涂层的防腐效果

IF 3.5 3区材料科学 Q2 ENGINEERING, CHEMICAL

International Journal of Adhesion and Adhesives

Pub Date : 2025-11-29 DOI: 10.1016/j.ijadhadh.2025.104231

Matheus Orlandi Pessoa , Jorgimara de Oliveira Braga , Sérgio Leonardo Butski Soares Santos , Brunela Pereira da Silva , Vera Rosa Capelossi , Fernando Cotting

The aim of this study is to evaluate the performance of an organic coating based on epoxy resin applied to the surface of galvanized steel that was pre-treated with the hybrid silane film (TEOS + GPTMS) incorporated with garlic peel powder (Allium sativum L.). Corrosion resistance was evaluated using electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization in NaCl 3.5 wt %. The cross-section SEM images revealed the adhesion of the substrate/coating and silane/epoxy interfaces. Test results indicated that the film modified with the natural inhibitor improved anticorrosive properties compared to the film without silane or natural green inhibitors. It can be concluded in EIS measurements that the complete pretrearment applied to grinded exhibits after 90 days of immersion the highest impedance modulus in the low-frequency region (|Z|_0.01Hz = 4.18 × 10⁹ Ω cm²). Similarly, the results after the immersion of pull-off adhesion tests was impaired when complete pretreatment was not used (0.15 MPa), which is a positive result for the future application of coatings with complete pretreatment based on this silane + natural corrosion inhibitor approach (0.60 MPa).

本研究的目的是评估一种基于环氧树脂的有机涂层在镀锌钢表面的性能，该涂层是用混合硅烷膜（TEOS + GPTMS）和大蒜皮粉（Allium sativum L.）预处理的。采用电化学阻抗谱（EIS）和动电位极化法对其在3.5 wt % NaCl中的耐蚀性进行了评价。SEM的横截面图像显示了衬底/涂层和硅烷/环氧界面的粘附性。试验结果表明，与不含硅烷或天然绿色缓蚀剂的膜相比，经天然缓蚀剂改性后的膜的防腐性能有所提高。在EIS测量中可以得出结论，对研磨物进行完全预处理后，浸泡90天后，低频区阻抗模量最高（|Z|0.01Hz = 4.18 × 109 Ω cm2）。同样，当不使用完全预处理（0.15 MPa）时，浸渍后的拉脱附着力测试结果也会受到影响，这对未来基于硅烷+天然缓蚀剂方法（0.60 MPa）的完全预处理涂层的应用是一个积极的结果。

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引用次数: 0