Morphological, Structural and Thermal Properties of Silane-treated Date Palm Fibers

ABSTRACT

This investigation aims to estimate the contribution of fluoro and non-fluorosilane to the surface properties of raw date palm fibers (DPFs). The raw DPFs were successfully functionalize using fluoro [trichloro(1h,1h,2h,2h-perfluorooctyl)] and non-fluorosilane [octadecyltrichloro] coupling agents using liquid-phase silanization method. The structure, chemical composition and thermal properties of functionalization have been proved by thermogravimetric analysis (TGA), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), X-ray diffraction and Fourier transform infrared spectroscopy (FTIR). TGA and XRD results indicate the reduction of the amorphous cellulose as an end result in silane modified DPF a have higher fraction of crystalline cellulose. The thermal properties of DPFs from the TGA results showed an increase dramatically after the treatment with silane coupling agents. The degradation temperature of the DPFs reached above 400°C with fluoro and non-fluorosilane, which is reasonably promising for using these fibers in hydrophobic polymer composites as reinforcing material.

摘要

本研究旨在评估氟和非氟硅烷对生椰枣纤维 (DPF) 表面性能的影响. 采用液相硅烷化方法, 使用氟[三氯 (1h, 1h, 2h, 2h全氟辛基)]和非氟硅烷[十八烷基三氯]偶联剂成功地对原料DPF进行功能化.通过热重分析 (TGA), 扫描电子显微镜 (SEM), 能量色散X射线分析 (EDX), X射线衍射和傅里叶变换红外光谱 (FTIR) 证实了功能化产物的结构、化学组成和热性能. TGA和XRD结果表明, 在硅烷改性的DPF a中, 无定形纤维素的还原作为最终结果, 具有更高的结晶纤维素分数. TGA结果显示, 经硅烷偶联剂处理后, DPF的热性能显著提高. 含氟和非氟硅烷的椰枣纤维的降解温度达到400°C以上, 这对于在疏水性聚合物复合材料中使用这些纤维作为增强材料是合理的.

KEYWORDS:

• Date palm fiber
• silane coupling agents
• fluorosilane
• non fluorosilane
• thermal gravimetric analysis
• cellulose

关键词:

• 椰枣纤维
• 硅烷偶联剂
• 氟硅烷
• 非氟硅烷
• 热重分析
• 纤维素

Highlights

• Hydrophobic date palm fibers (DPF) were synthesized using fluorinated and non-fluorinated silane coupling agents.

• Fluorinated and non-fluorinated date pal fibers thermal stability, crystallinity and hydrophobicity were found to increase with silane treatment compared to raw DPF.

• TGA, SEM and XRD analysis data indicate reduction of hemicellulose content in fluorinated and non-fluorinated after the silane modification.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This publication was supported by grant number [113602] from Higher Colleges of Technology (HCT). Its contents are solely the responsibility of the authors and do not necessarily represent the official views of HCT.