Effect of Sunlight Exposure and Aging on Adhesion Strength between Coatings and Epoxy Resin Matrix Composites
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摘要: 为了解风电叶片生产过程中阳光照射时间对叶片材料表面涂装质量的影响,对环氧树脂基复合材料壳体材料进行阳光下暴晒,使之达到一定的老化程度,在其表面进行聚氨酯胶衣涂装,考察了暴晒时间对胶衣与复合材料间附着力的影响。研究表明,随着暴晒老化的进行,胶衣对基体的附着力呈下降趋势,老化5天时附着力由初始的9MPa左右平缓下降到7MPa左右,后快速降低。Abstract: In order to understand the impact of sunlight exposure on adhesion between coats and glass fiber reinforced composite wind turbine blade,the glass fiber reinforced epoxy resin composites samples are exposed in sunlight for different time,then PU gel-coating are coated on them and the effect of sunlight aging on the adhesion strength between GFRP composites and gel-coatings is investigated in pull-off method.The results show that the adhesion strength of gel-coating decreases from about 9 MPa to about 7 MPa,corresponded to light-aging time from 0 day to 5 days,and then decreases sharply after 6 days light-aging.
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Key words:
- Wind turbine blade /
- Epoxy resin matrix composites /
- Sunlight exposure /
- PU gel-coat /
- Adhesion strength
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