Effect of Alkali Treatment on Alfa Fibers Behavior

Abstract

The object of this study is to characterize of Algerian Alfa (Esparto grass or Stipa tenacissima L), and also to examine the effect of chemical treatment on different properties of this fiber. The surface of the Alfa vegetable fibers was modified by alkali treatment in 5% (NaOH) aqueous solution for 2, 4, 6, 8, 16, 24, 48, and 72 h. The chemical, physical, and morphological properties of the Alfa fibers were investigated. The results show that the Alfa fibers are composed of 39% cellulose, 33% hemicelluloses, 20% lignin, and certain minerals (e.g., SiO₂, K₂O, and CaO). The alkali treatment of the fibers contributes to a decrease in the rate of moisture absorption and to an increase the crystallinity and stiffness. The processing time for adequate alkali treatment is observed at 6 h.

摘要

本研究的目的是发现阿尔及利亚阿尔法（西班牙草或 Stipa tenacissima L）的特性，并查看化学处理对此纤维不同性能的影响。在研究中，将阿尔法植物纤维放在 5％ 氢氧化钠 (NaOH) 水溶液中分别达 2、4、6、8、16、24、48 和 72 小时，通过碱处理对其表面进行修复，从而研究阿尔法纤维的化学、物理和形态性能。结果表明，阿尔法纤维由 39％ 纤维素、33％ 半纤维素、20％ 木质素和某些矿物质（例如，二氧化硅，K₂O 和 CaO）组成。碱处理有助于降低纤维的吸湿速率并增加结晶度和硬度。充分碱处理的处理时间为 6 小时。

KEYWORDS:

• Alfa
• alkali treatment
• chemical properties
• physical properties
• Stipa tenacessima

关键词:

• 阿尔法
• 碱处理
• 化学属性
• 物理属性