Rachtanapun Pornchai, Sawangrat Choncharoen, Kanthiya Thidarat, Kaewpai Kannikar, Thipchai Parichat, Tanadchangsaeng Nuttapol, Worajittiphon Patnarin, Suhr Jonghwan, Wattanachai Pitiwat, Jantanasakulwong Kittisak
Faculty of Agro-Industry, Chiang Mai University, Chiang Mai 50100, Thailand.
Center of Excellence in Materials Science and Technology, Chiang Mai University, Chiang Mai 50200, Thailand.
Polymers (Basel). 2024 Nov 30;16(23):3394. doi: 10.3390/polym16233394.
In this study, we investigated the behaviors of epoxy composites reinforced with bamboo (BF) and hemp (HF) fibers. Both fibers were treated using dielectric barrier discharge (DBD) plasma for various durations (2.5 to 20 min). Epoxy resin (ER) was mixed with BF or HF with and without plasma treatment. The Fourier-transform infrared spectra of the plasma-treated fibers showed an enhanced peak intensity of carboxyl groups. ER/BF treated for 20 min exhibited a high tensile strength (up to 56.5 MPa), while ER/HF treated for 20 min exhibited a more significant increase in elongation at break (6.4%). Flexural tests indicated that the plasma treatment significantly improved the flexural strength of the hemp composites (up to 62.2 MPa) compared to the bamboo composites. The plasma treatment increased the fiber surface roughness and interfacial bonding in both composites. The thermal stability and wettability were improved by the DBD plasma treatment. The DBD plasma treatment enhanced the interfacial adhesion between fibers and ER matrix, which improved the mechanical, thermal, and wettability properties of the composites.
在本研究中，我们研究了用竹纤维（BF）和麻纤维（HF）增强的环氧复合材料的性能。两种纤维均采用介质阻挡放电（DBD）等离子体处理不同时间（2.5至20分钟）。环氧树脂（ER）与经过和未经过等离子体处理的BF或HF混合。经等离子体处理的纤维的傅里叶变换红外光谱显示羧基的峰强度增强。经20分钟处理的ER/BF表现出较高的拉伸强度（高达56.5MPa），而经20分钟处理的ER/HF的断裂伸长率有更显著的增加（6.4%）。弯曲试验表明，与竹复合材料相比，等离子体处理显著提高了麻复合材料的弯曲强度（高达62.2MPa）。等离子体处理增加了两种复合材料中纤维的表面粗糙度和界面结合力。DBD等离子体处理提高了热稳定性和润湿性。DBD等离子体处理增强了纤维与ER基体之间的界面附着力，从而改善了复合材料的力学、热学和润湿性性能。
