吸湿条件下可剥布处理对复合材料胶接性能的影响

玻璃钢/复合材料 ›› 2019, Vol. 0 ›› Issue (10): 90-95.

吸湿条件下可剥布处理对复合材料胶接性能的影响

王英男^1,2, 潘利剑^2*, 刘钧天³, 刘宇婷³

1.东华大学材料科学与工程学院,上海201620;
2.东华大学民用航空复合材料协同创新中心,上海201620;
3.上海飞机制造有限公司,上海201324

收稿日期:2018-12-25 出版日期:2019-10-28 发布日期:2019-10-28
通讯作者: 潘利剑(1980-),男,副研究员,博士研究生,主要从事树脂基复合材料方面的研究,xiaopanhrb@163.com
作者简介:王英男(1992-),女,硕士研究生,主要从事树脂基复合材料方面的研究。
基金资助:
国家商用飞机制造工程技术研究中心创新基金(COMAC-SFGS-2016-33311)

INFLUENCE OF HYGROSCOPICITY AND PEEL PLY SURFACETREATMENT TOWARDS ADHESION OF COMPOSITES

WANG Ying-nan^1,2, PAN Li-jian^2*, LIU Jun-tian¹, LIU Yu-ting¹

1.College of Materials Science and Engineering, Donghua University, Shanghai 201620, China;
2.Center for Civil Aviation Composites, Donghua University, Shanghai 201620, China

Received:2018-12-25 Online:2019-10-28 Published:2019-10-28

摘要/Abstract

摘要： 采用T300/Cycom970预浸料,选取R60、R60s、P60001和EA9895 4种可剥布,利用热压罐分别制备不带有可剥布以及表面带有不同可剥布的复合材料层合板;在(80±2)%RH(相对湿度)和(70±1) ℃环境下对其进行吸湿处理,时间分别为0、10 d、20 d和40 d。采用Henkel航空PL7000型号胶膜对处理后的层合板进行胶接并制备试验样品。对试样的单搭接剪切强度、剥离强度进行测试,并分析胶接破坏形式,探讨吸湿条件下,可剥布处理对复合材料胶接性能的影响;通过环境扫描电子显微镜、X射线光电子能谱仪测试分析吸湿条件下不同类型可剥布对复合材料胶接界面的影响因素。结果表明:随着吸湿时间的增加,聚酰胺类可剥布吸湿率最终为0.8%左右,而聚酯类可剥布为0.6%左右。随着吸湿度的增加,复合材料的单搭接剪切强度下降40%~50%;吸湿时间为40 d时,四种可剥布处理的试样性能非常接近。未经处理试样始终发生黏附破坏,可剥布处理试样吸湿前期,破坏模式逐渐向黏附破坏转变,最终全部变为内聚破坏。吸湿处理后复合材料表面相比未吸湿形成了较多的空腔及缺陷,表面存在柔性聚合物残留,聚酰胺类可剥布处理后复合材料表面氮元素较之前提升了25%左右,影响了胶接面的化学性质。

关键词: 复合材料, 可剥布, 吸湿度, 胶接质量, 表面特性

Abstract: Composite laminates with different surface properties made of T300/Cycom 970 prepreg and four plies, which include R60, R60s, P60001 and EA9895, were fabricated by autoclave. The pretreatment condition was (80±2)RH%, (70±1) ℃ for 0, 10 d, 20 d, 40 d, respectively. The Henkel Aerospace PL7000 adhesive film was used to bond the strippable laminates for testing. The effects of hygroscopicity and strippable treatment on the bonding properties of composites were investigated by the analysis of single lap shear strength, peel strength and bond failure forms. Influence of hygroscopicity and different types of peel ply on composite bonding interface was studied by SEM and XPS. Results show that with the increase of hygroscopic time, the hygroscopic rate of polyamide peel plies is about 80%, while polyester is about 60%. As the hygroscopic increases, the mechanical properties of the composite material decrease by 40%~50%. When the hygroscopic time is 40 d, the properties of the four peel plies are very close. The controlled samples always have adhesion failure, while the failure mode of the peel ply treated samples is also adhesion failure in the early stage of moisture absorption, then gradually turns to the cohesive failure of the material. After the hygroscopic treatment, the surface of the composite materials forms more cavities and defects than the non-hygroscopic, and there are residual polymer residues on the surface. The surface nitrogen content of polyamide-based peel ply composites is about 25% higher than before, which may affect the chemical properties of the bonding surface.

Key words: composites, peel ply, hygroscopicity, bond quality, surface performance

中图分类号:

TB332

王英男, 潘利剑, 刘钧天, 刘宇婷. 吸湿条件下可剥布处理对复合材料胶接性能的影响[J]. 玻璃钢/复合材料, 2019, 0(10): 90-95.

WANG Ying-nan, PAN Li-jian, LIU Jun-tian, LIU Yu-ting. INFLUENCE OF HYGROSCOPICITY AND PEEL PLY SURFACETREATMENT TOWARDS ADHESION OF COMPOSITES[J]. Fiber Reinforced Plastics/Composites, 2019, 0(10): 90-95.

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