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通过预聚对苯二甲酰己二胺超细粉末实现连续碳纤维增强聚对苯二甲酰己二胺复合材料的界面增强与复合材料制造

Interfacial Enhancement and Composite Manufacturing of Continuous Carbon-Fiber-Reinforced PA6T Composites via PrePA6T Ultrafine Powder.

作者信息

Yao Jiahong, Wang Zhao, Yang Jiacao, Wang Xiaojun, Yang Jie

机构信息

College of Polymer Science and Engineering, Sichuan University, Chengdu 610064, China.

Analytical and Testing Center, Sichuan University, Chengdu 610064, China.

出版信息

Materials (Basel). 2024 Mar 28;17(7):1557. doi: 10.3390/ma17071557.

DOI:10.3390/ma17071557
PMID:38612072
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11012839/
Abstract

Semi-aromatic poly (hexamethylene terephthalamide) (PA6T) oligomer (prePA6T) ultrafine powder, with a diameter of <5 μm, was prepared as an emulsion sizing agent to improve the impregnation performance of CF/PA6T composites. The prePA6T hyperfine powder was acquired via the dissolution and precipitation "phase conversion" method, and the prePA6T emulsion sizing agent was acquired to continuously coat the CF bundle. The sized CF unidirectional tape was knitted into a fabric using the plain weave method, while the CF/PA6T laminated composites were obtained by laminating the plain weave fabrics with PA6T films. The interfacial shear strength (IFSS), tensile strength (TS), and interlaminar shear strength (ILSS) of prePA6T-modified CF/PA6T composites improved by 54.9%, 125.3%, and 120.9%, respectively. Compared with the commercial polyamide sizing agent product PA845H, the prePA6T sizing agent showed better interfacial properties at elevated temperatures, especially no TS loss at 75 °C. The SEM observations also indicated that the prePA6T emulsion has an excellent impregnation effect on CF, and the fracture mechanism shifted from adhesive failure mode to cohesive failure mode. In summary, a facile, heat-resistant, undamaged-to-fiber environmental coating process is proposed to continuously manufacture high-performance thermoplastic composites, which is quite promising in mass production.

摘要

制备了直径小于5μm的半芳香族聚（对苯二甲酰己二胺）（PA6T）低聚物（prePA6T）超细粉末作为乳液上浆剂，以改善CF/PA6T复合材料的浸渍性能。通过溶解沉淀“相转化”法获得prePA6T超细粉末，并获得prePA6T乳液上浆剂以连续包覆CF束。将上浆后的CF单向带采用平纹编织法编织成织物，而CF/PA6T层压复合材料则通过将平纹织物与PA6T薄膜层压获得。prePA6T改性CF/PA6T复合材料的界面剪切强度（IFSS）、拉伸强度（TS）和层间剪切强度（ILSS）分别提高了54.9%、125.3%和120.9%。与市售聚酰胺上浆剂产品PA845H相比，prePA6T上浆剂在高温下表现出更好的界面性能，尤其是在75°C时无TS损失。SEM观察还表明，prePA6T乳液对CF具有优异的浸渍效果，断裂机制从粘附破坏模式转变为内聚破坏模式。总之，提出了一种简便、耐热、对纤维无损的环保涂层工艺来连续制造高性能热塑性复合材料，这在大规模生产中颇具前景。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f8d4/11012839/72d4389e7edf/materials-17-01557-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f8d4/11012839/72d4389e7edf/materials-17-01557-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f8d4/11012839/ac04bcf1b2a0/materials-17-01557-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f8d4/11012839/0308e1d51a5e/materials-17-01557-g002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f8d4/11012839/9905dcb82e88/materials-17-01557-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f8d4/11012839/97a921818aae/materials-17-01557-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f8d4/11012839/d1872b05c75c/materials-17-01557-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f8d4/11012839/3c16be35d113/materials-17-01557-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f8d4/11012839/5b802686647e/materials-17-01557-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f8d4/11012839/2bffb24462c0/materials-17-01557-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f8d4/11012839/c9f349cbac47/materials-17-01557-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f8d4/11012839/26586d8ed092/materials-17-01557-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f8d4/11012839/b3c0916bc299/materials-17-01557-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f8d4/11012839/72d4389e7edf/materials-17-01557-g013.jpg

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