Enhanced adhesion of epoxy resin to basalt fibres using a segregating star-like copolymer additive

IF 7.7 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2025-06-03 DOI:10.1016/j.coco.2025.102497

K. Zukiene , R. Pinto , G. Monastyreckis , V. Spacek , T. Glaskova-Kuzmina , D. Zeleniakiene

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Abstract

This study investigates the influence of interfacial segregation of star-like n-butyl methacrylate-block-glycidyl methacrylate (n-BMA-GMA) copolymer additive on the adhesion performance of a bio-based epoxy resin derived from bisphenol A diglycidyl ether (DGEBA) to basalt fibre. The adhesion properties of the DGEBA were modified through additive-induced surface modification by incorporating small amounts (up to 0.5 wt%) of the amphiphilic star-like copolymer. The high density of chain ends and lower surface tension compared to the epoxy matrix, along with the amphiphilic nature of the branched copolymer, led to preferential migration of the branched copolymer to the epoxy film surface. Segregation results were confirmed by atomic force microscopy (AFM) adhesion forces and contact angle measurements. AFM studies revealed that the top surface of the star-like copolymer modified epoxy exhibited AFM adhesion forces similar to those of the star-like copolymer even at small contents up to 0.5 wt%. Segregation was confirmed by surface tension analysis. In addition, the star-like copolymer reduces the surface tension of DGEBA resin and enhances its wettability to basalt fibres. The improved wetting properties resulted in improved resin adhesion properties to basalt, which were confirmed by Mode I interlaminar fracture toughness tests.

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使用分离星形共聚物添加剂增强环氧树脂与玄武岩纤维的附着力

研究了星形甲基丙烯酸正丁酯-嵌段甲基丙烯酸缩水甘油酯（n-BMA-GMA）共聚物添加剂的界面偏析对双酚a二缩水甘油酯醚（DGEBA）合成的生物基环氧树脂与玄武岩纤维粘合性能的影响。通过加入少量（高达0.5 wt%）的两亲星形共聚物，通过添加剂诱导的表面改性改性了DGEBA的粘附性能。与环氧基体相比，支链共聚物具有较高的链端密度和较低的表面张力，再加上支链共聚物的两亲性，使得支链共聚物优先向环氧膜表面迁移。通过原子力显微镜（AFM）、粘附力和接触角测量证实了偏析结果。AFM研究表明，星形共聚物改性环氧树脂的顶表面即使在含量低至0.5 wt%时也表现出与星形共聚物相似的AFM附着力。表面张力分析证实了偏析。此外，星形共聚物降低了DGEBA树脂的表面张力，提高了其对玄武岩纤维的润湿性。润湿性能的改善导致树脂对玄武岩的粘附性能得到改善，通过I型层间断裂韧性试验证实了这一点。

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来源期刊

Composites Communications Materials Science-Ceramics and Composites

CiteScore

12.10

自引率

10.00%

发文量

340

审稿时长

36 days

期刊介绍： Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.