TY - JOUR
T1 - Rapid surface modification of CFRP via femtosecond laser-assisted by chemical approach to enhance adhesive performance
AU - Yuan, Yanping
AU - Guo, Xiaoran
AU - Gu, Yuhan
AU - Li, Dongfang
AU - Zhang, Kaihu
AU - Han, Weina
N1 - Publisher Copyright:
© 2024 Elsevier Ltd
PY - 2025/1
Y1 - 2025/1
N2 - The increasing demand for lightweight materials has made adhesive bonding a primary method for connecting CFRP. Enhancing the surface quality of adhesive joints is crucial for achieving higher adhesive performance. Femtosecond laser treatment is recognized for its unique advantages in CFRP surface treatment but often faces challenges with spot size and surface quality. This study proposes an efficient method for preparing high-adhesive CFRP surfaces using a femtosecond laser assisted by nitric acid and ultrasonic treatment. By optimizing the laser and nitric acid-ultrasonic treatment parameters, a high-quality surface suitable for strong adhesive joints is achieved. The results indicate that this approach enhances the tensile shear strength of bonded CFRP by approximately 48.0 %. Remarkably, the laser pretreatment for a 12.5 mm × 25.0 mm area can be completed in just 150 s, increasing laser processing efficiency by a factor of approximately 226. The reasons for this enhanced performances are closely related to the synergetic effects of surface prepared method, which increases roughness (48.3 nm), surface free energy (74.8 mJ/m2), and the O/C ratio (33.3 %) with more oxygen-containing functional groups. This research provides valuable technical and theoretical guidance for the preparation of high-bond strength CFRP joints.
AB - The increasing demand for lightweight materials has made adhesive bonding a primary method for connecting CFRP. Enhancing the surface quality of adhesive joints is crucial for achieving higher adhesive performance. Femtosecond laser treatment is recognized for its unique advantages in CFRP surface treatment but often faces challenges with spot size and surface quality. This study proposes an efficient method for preparing high-adhesive CFRP surfaces using a femtosecond laser assisted by nitric acid and ultrasonic treatment. By optimizing the laser and nitric acid-ultrasonic treatment parameters, a high-quality surface suitable for strong adhesive joints is achieved. The results indicate that this approach enhances the tensile shear strength of bonded CFRP by approximately 48.0 %. Remarkably, the laser pretreatment for a 12.5 mm × 25.0 mm area can be completed in just 150 s, increasing laser processing efficiency by a factor of approximately 226. The reasons for this enhanced performances are closely related to the synergetic effects of surface prepared method, which increases roughness (48.3 nm), surface free energy (74.8 mJ/m2), and the O/C ratio (33.3 %) with more oxygen-containing functional groups. This research provides valuable technical and theoretical guidance for the preparation of high-bond strength CFRP joints.
KW - Adhesive performance
KW - Carbon fiber reinforced polymer
KW - Femtosecond laser
KW - Surface modification
UR - http://www.scopus.com/inward/record.url?scp=85212077463&partnerID=8YFLogxK
U2 - 10.1016/j.coco.2024.102200
DO - 10.1016/j.coco.2024.102200
M3 - Article
AN - SCOPUS:85212077463
SN - 2452-2139
VL - 53
JO - Composites Communications
JF - Composites Communications
M1 - 102200
ER -