Abstract
To enhance the bonding properties between ramie fiber and epoxy resin, the ramie fiber was modified using nano-silica grafting. Hydrophilic nano-silica treated with water-soluble sodium dodecyl sulfate (SDS) and organic silane coupling agents was grafted onto the surface of ramie fiber. The surface roughness of the fibers was considerably increased after grafting. The nano-silica particles on the fiber surface enhanced the mechanical and thermal properties of the fiber-epoxy composite plates. Based on an analysis of contact angle measurements and a water absorption study, it was determined that the hydrophilicity of the treated fiber was weakened.
概要
目 的
通过在苎麻纤维表面接枝纳米二氧化硅颗粒,改 善苎麻纤维与环氧树脂的界面粘结性能,从而提 升苎麻纤维增强环氧树脂复合材料的力学性能。
创新点
将纳米二氧化硅颗粒接枝到苎麻纤维表面,从而 大幅提升苎麻纤维与环氧树脂的界面粘结性能 与复合材料的力学性能。
方 法
利用十二烷基硫酸钠均匀分散二氧化硅纳米粒 子,并在硅烷偶联剂作用下,将二氧化硅纳米粒 子接枝到苎麻纤维表面。
结 论
纳米二氧化硅接枝到苎麻纤维表面大幅提升了纤 维表面粗糙度,降低了纤维亲水性能,升高了纤 维与环氧树脂的界面粘度,从而改善了复合材料 的力学性能。
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Anna DILFI K. F. wrote the first draft of the manuscript. Zi-jin CHE performed some tests. Gui-jun XIAN proposed the idea, supervised the research work, and revised and edited the final version.
Conflict of interest
Anna DILFI K.F., Zi-jin CHE, and Gui-jun XIAN declare that they have no conflict of interest.
Project supported by the Chinese MIIT Special Research Plan on Civil Aircraft (No. MJ-2015-H-G-103) and the National Natural Science Foundation of China (No. 51878223)
Prof. Gui-jun XIAN has been an Editorial Board Member of Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering) since 2018.
Prof. XIAN obtained his PhD degree from Zhejiang University, China in 2001. Since then, he worked in the Institute of Composite Materials (IVW), Kaiserslautern University, Germany (2001–2005), and University of California, San Diego, USA (2005–2009). In 2009, Prof. XIAN joined the School of Civil Engineering, Harbin Institute of Technology (HIT), China. His research interests focus on novel fiber reinforced polymer composites and structures. By now, he has published more than 140 technical papers in international journals and conferences.
Prof. XIAN has been a member in the International Institute for FRP in Construction (IIFC) and the Society for the Advancement of Material and Process Engineering (SAMPE) of China. He is active in major international conferences related to FRP composites and structures. He was the co-chair of the 6th Asia-Pacific Conference on FRP in Structures (APFIS) and has given three international conference presentations as a keynote speaker in 2019.
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Dilfi K. F., A., Che, Zj. & Xian, Gj. Grafting of nano-silica onto ramie fiber for enhanced mechanical and interfacial properties of ramie/epoxy composite. J. Zhejiang Univ. Sci. A 20, 660–674 (2019). https://doi.org/10.1631/jzus.A1900186
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DOI: https://doi.org/10.1631/jzus.A1900186
Key words
- Nano-silica
- Sodium dodecyl sulfate (SDS)
- Silane coupling agent
- Ramie fiber
- Mechanical properties
- Interfacial properties