Laser Surface Pre-Treatment of CFRP for Adhesive Bonding in Consideration of the Absorption Behaviour
Laser Surface Pre-Treatment of CFRP for Adhesive Bonding in Consideration of the Absorption Behaviour
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DOI：
10.1080/00218464.2012.660042
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发表时间：
2012-01-01
影响因子：
2.2
通讯作者：
Dilger, K.
中科院分区：
文献类型：
--
作者：
Fischer, F.;Kreling, S.;Dilger, K.
碳纤维增强塑料（CFRP）在所有轻质建筑领域的使用正在显着增长。像环氧树脂这样的热固性材料仍然是部署的基质材料的主要部分。CFRP的一种合适的连接技术是粘接。然而，由于污染物的存在，粘结性能大大降低。为了实现完全的粘合强度，粘合剂对组件的粘合是必不可少的。一种创新的表面预处理方法是激光辐射。以前的研究表明，一个重要的参数是吸收。结果，使用UV激光器（波长355 nm）和CO2激光器（波长10600 nm）预处理由120 ℃固化环氧树脂制造的试样。重点是在不损害纤维的情况下实现树脂的选择性去除。搭接剪切试样进行了预处理，与单组分环氧树脂膜粘合剂和测试。激光预处理的试样达到了与通过手动研磨制备的参照物相同的粘结强度。此外，考虑到发射辐射的不同热存款和吸收行为，激光辐射与基体材料以及纤维之间的相互作用的机制进行了讨论。
The use of carbon fibre-reinforced plastics (CFRP) is growing significantly in all areas of lightweight construction. Thermosets like epoxy still build a major part of deployed matrix material. A suitable joining technology for CFRP is adhesive bonding. However, the bonding performance is well reduced because of contaminations. To achieve full bond-strength, adhesion of the adhesive to the components is essential. One innovative method for surface pre-treatment is laser radiation. Former investigations show that an important parameter is the absorption. As a result of that, a UV laser (wavelength of 355 nm) and a CO2 laser (wavelength of 10600 nm) were used to pre-treat specimens manufactured from 120 degrees C curing epoxy. The focus is to achieve a selective removal of resin without impairing the fibres. Lap-shear specimens have been pre-treated, bonded with an one component epoxy film adhesive and tested. The laser pre-treated specimens achieve the same bond strength as references prepared by manual abrading. Furthermore, the mechanisms of interaction between laser radiation and matrix material as well as fibres are discussed considering the different heat deposit and absorption behaviour of the emitted radiations.