高效自修复聚硫-环氧材料的制备及修复性能
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常州大学设计研究院

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江苏省研究生科研与实践创新计划(SJCX21_1226)


Preparation and Repair Performance of Highly Efficient Self-Healing Polysulfide-Epoxy Materials
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    摘要:

    为避免树脂机械强度和自修复性能间的冲突,合成了一系列具有嵌段结构的聚硫-环氧树脂,并制备了基于该树脂的自修复弹性体/涂层,研究了修复效率的影响因素和涂层的修复性能。自修复效率测试表明:弹性体最佳的原料配比为E20环氧树脂和LP-3聚硫橡胶(摩尔比2:1),固化剂为聚醚胺,并使用三乙胺催化修复过程。拉伸测试表明:固化后样品的拉伸强度为12.95 MPa,截断后经80 ℃-24 h修复可恢复93.5%,修复3次后拉伸强度未衰减。中性盐雾测试表明:聚硫-环氧自修复涂层具有良好的防腐性能,表面划痕经修复后可耐受72小时中性盐雾,完好涂层可耐168h盐雾,具有应用潜力。

    Abstract:

    Here, a series of polysulfide-epoxy resins with block structures were prepared to avoid the conflict between the mechanical strength and the self-healing properties. Besides, self-healing elastomers/coatings based on these resins were prepared to investigate the factors influencing the repair efficiency and the self-healing properties in the application. Self-repair efficiency tests indicated that the best raw material resins for the elastomer is E20 epoxy resin and LP-3 polysulfide rubber (molar ratio = 2:1), and the curing agent is polyetheramine D400. In addition, the catalyst plays an important role in the repair process, and 1 wt% triethylamine is utilized to catalyze the healing reaction. Tensile tests showed that the tensile strength of the cured sample is 12.95 MPa, and the fractured sample can be repaired to 93% of original strength (repair conditions: 80 ℃,24 h). The tensile strength of the elastomer don’t decay after three times of repair. The neutral salt spray test indicated that the polysulfide-epoxy self-healing coating possesses excellent corrosion resistance and the scratched surface can withstand 72 h neutral salt spray after healing. Besides, the intact coating could withstand 168h salt spray, which has application potential.

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  • 收稿日期:2022-03-20
  • 最后修改日期:2022-04-21
  • 录用日期:2022-04-24
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