期刊
FIBERS AND POLYMERS
卷 23, 期 1, 页码 243-253出版社
KOREAN FIBER SOC
DOI: 10.1007/s12221-021-0125-8
关键词
Lignocellulosic fiber; Laccase; TEMPO; Hydrophobization; PLA composites; Interfacial compatibility
资金
- Zhejiang Provincial Natural Science Foundation of China [LGG18E030005]
- International Cooperation Project of Shaoxing University [2019LGGH1002]
- Open Project Program of Key Laboratory of Eco-textiles, Ministry of Education, Jiangnan University [KLET1703]
- China Postdoctoral Science Foundation [2019M652273]
- Jiangxi Excellent Young Talents Program [20192BCB23030]
- Jiangsu Key Research & Development Plan [BE2018349]
- International Joint Research Laboratory for EcoTextile Technology (IJRLETT) at Jiangnan University
Hydrophobization of lignocellulosic jute fibers was achieved by grafting octadecylamine (OA) onto their surface using laccase/TEMPO mediation, improving the interfacial compatibility with nonpolar polylactic acid (PLA) resins in fiber-reinforced composites. The modified fibers exhibited enhanced surface hydrophobicity and reduced polarity, leading to stronger interfacial adhesion and improved mechanical properties in the resulting composites. Furthermore, the hydrophobized jute/PLA composites showed better mechanical stability in water immersion tests, indicating the efficacy of this enzymatic modification method for producing high-performance natural fiber-reinforced composites.
In this work, the hydrophobization of lignocellulosic jute fibers was achieved via the laccase/TEMPO-mediated grafting of octadecylamine (OA) on their surface, with the aim to improve the interfacial compatibility with nonpolar polylactic acid (PLA) resins in fiber-reinforced composites. The modified jute fibers were analyzed by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS). The characteristic vibrations of methylene groups and the increase in the surface C/O ratio of the jute fibers after the enzymatic treatment indicated that OA molecules were successfully grafted onto the jute fiber surface mediated by the laccase/TEMPO system. It was shown that the grafted jute fibers had increased surface hydrophobicity and reduced polarity with water contact angle of 124.2 degrees, diiodomethane contact angle of 94.1 degrees and surface free energy of 11.44 mJ/m(2), which were attributed to the presence of the OA nonpolar alkyl chains on their surface. The tensile, bending, and dynamic mechanical properties of the hydrophobized jute/PLA composites were enhanced, which suggested stronger interfacial adhesion between the jute fibers and the PLA matrix. The mechanical stability was investigated by water immersion measurements and it was found that the modified jute/PLA composites were better in this regards than the control jute/PLA composites. Therefore, this enzymatic hydrophobic modification could be used as an effective and eco-friendly method to produce natural lignocellulosic fiber-reinforced composites with excellent performance.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据