Investigation on the Physicochemical and Mechanical Properties of Novel Alkali-treated Phaseolus vulgaris Fibers

ABSTRACT

This investigation is aimed to analyze the effect of sodium hydroxide (NaOH) treatment on the physical, chemical, structural, thermal and surface topography of Phaseolus vulgaris fibers (PVFs). The surface of raw PVFs was modified by soaking with 5% NaOH solution for 15, 30, 45 and 60 min. The various functional groups of the alkali-treated PVFs (APVFs) were studied Fourier-transform infrared spectroscopy. The outcomes of thermogravimetric analysis evident that the optimum treatment time for 5% NaOH was 45 min. It was noticed that optimally treated PVFs have higher cellulose (69.48 wt.%), crystallinity index (52.27%) and lower hemicellulose (4.30 wt.%), lignin (7.02 wt.%) contents. The thermogravimetric analysis (TGA) of PVFs also revealing moderate thermal stability was observed; atomic force microscopy (AFM) investigation inveterates that the surface of the fiber is rough and it will be a potential reinforcement for polymer composites.

摘要

本研究旨在分析氢氧化钠(NaOH)处理对相生纤维(PVFs)物理、化学、结构、热及表面形貌的影响. 用5%氢氧化钠溶液分别浸泡15、30、45、60分钟，对生相木纤维表面进行改性. 研究了经碱处理的相角纤维(APVFs)的各种官能团的傅里叶变换红外光谱. 热重分析结果表明，5%氢氧化钠的最佳治疗时间为45分钟. 结果表明，经优化处理的普通相木纤维纤维素含量较高(69.48 wt.%)，结晶度指数较低(52.27%)，半纤维素含量较低(4.30 wt.%)，木质素含量较低(7.02 wt.%). 通过热重分析(TGA)发现，相生纤维具有一定的热稳定性，原子力显微镜(AFM)研究发现，相生纤维表面粗糙，是一种潜在的增强高分子复合材料的材料.

KEYWORDS:

• Alkali treatment
• optimally treated PVF
• FT-IR
• XRD
• TGA and AFM

关键词:

• 碱处理
• 经过最佳处理的普通相思纤维
• 傅里叶变换红外光谱法
• X-射线衍射
• 热重量分析和原子力显微镜

Acknowledgements

This project was funded by the Deanship of Scientific Research (DSR), King Abdulaziz University, Jeddah, under grant No. (D-49-130-1442). The authors, therefore, gratefully acknowledge DSR technical and financial support.

Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.