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研究在高压釜固化条件下制备的胶粘剂复合接头中分层的PA66电纺纳米纤维的影响。

Investigating the Effects of PA66 Electrospun Nanofibers Layered within an Adhesive Composite Joint Fabricated under Autoclave Curing.

作者信息

Esenoğlu Gözde, Tanoğlu Metin, Barisik Murat, İplikçi Hande, Yeke Melisa, Nuhoğlu Kaan, Türkdoğan Ceren, Martin Seçkin, Aktaş Engin, Dehneliler Serkan, Gürbüz Ahmet Ayberk, İriş Mehmet Erdem

机构信息

Department of Mechanical Engineering, Izmir Institute of Technology, Urla 35340, Izmir , Turkey.

TUSAŞ (Turkish Aerospace Industries Inc.), Kahramankazan, 06980 Ankara, Turkey.

出版信息

ACS Omega. 2023 Aug 29;8(36):32656-32666. doi: 10.1021/acsomega.3c03419. eCollection 2023 Sep 12.

DOI:10.1021/acsomega.3c03419
PMID:37720802
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10500682/
Abstract

Enhancing the performance of adhesively joined composite components is crucial for various industrial applications. In this study, polyamide 66 (PA66) nanofibers produced by electrospinning were coated on unidirectional carbon/epoxy prepregs to increase the bond strength of the composites. Carbon/epoxy prepregs with/without PA66 nanofiber coating on the bonding region were fabricated using the autoclave, which is often used in the aerospace industry. The single lap shear Charpy impact energy and Mode-I fracture toughness tests were employed to examine the effects of PA66 nanofibers on the mechanical properties of the joint region. Scanning electron microscopy (SEM) was used to investigate the nanofiber morphology and fracture modes. The thermal characteristics of Polyamide 66 nanofibers were explored by using differential scanning calorimetry (DSC). We observed that the electrospun PA66 nanofiber coating on the prepreg surfaces substantially improves the joint strength. Results revealed that the single lap shear and Charpy impact strength values of the composite joint are increased by about 79 and 24%, respectively, by coating PA66 nanofibers onto the joining region. The results also showed that by coating PA66 nanofibers, the Mode-I fracture toughness value was improved by about 107% while the glass transition temperature remained constant.

摘要

提高粘结复合部件的性能对于各种工业应用至关重要。在本研究中，通过静电纺丝制备的聚酰胺66（PA66）纳米纤维被涂覆在单向碳/环氧预浸料上，以提高复合材料的粘结强度。使用航空航天工业中常用的高压釜制造在粘结区域有/无PA66纳米纤维涂层的碳/环氧预浸料。采用单搭接剪切夏比冲击能量和I型断裂韧性试验来研究PA66纳米纤维对连接区域力学性能的影响。使用扫描电子显微镜（SEM）研究纳米纤维形态和断裂模式。通过差示扫描量热法（DSC）探索聚酰胺66纳米纤维的热特性。我们观察到预浸料表面的静电纺PA66纳米纤维涂层显著提高了连接强度。结果表明，通过在连接区域涂覆PA66纳米纤维，复合接头的单搭接剪切强度和夏比冲击强度值分别提高了约79%和24%。结果还表明，通过涂覆PA66纳米纤维，I型断裂韧性值提高了约107%，而玻璃化转变温度保持不变。

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