Plant Extraction and Physicochemical Characterizations of Untreated and Pretreated Diss Fibers (Ampelodesmos mauritanicus)

ABSTRACT

The Ampelodesmos mauritanicus plant, Mauritanian grass or also called ‘Diss’, is a perennial abundant plant on the Mediterranean contour, having attractive characteristics for ecofriendly materials. This work aims to highlight the potential of the Diss fibers elements by assessing their use as reinforcement for polymer matrices (bio-composite). So, untreated and treated Diss fibers by chemical (soda, silane and acetic acid) and thermal treatment have been manually extracted and characterized to evaluate their surface condition as well as their chemical composition, their mechanical properties and their thermal stability. The obtained results have shown many advantages look promising for such an application, especially the fact that the Diss fiber bundles has small diameter (89 ± 22 μm), a rough surface with the presence of thorns, a low density of 0.93 g/cm3, and a tensile strength that can reach 270 MPa. Furthermore, all the treatments adopted have shown improvements regarding the fibrillation of fiber bundles (could reach −40% for the diameter), their surface state, their thermal stability and their mechanical behavior (could reach +60% for Young’s modulus and +15% for tensile stress).

摘要

Ampelodesmos mauritanicus 植物，毛里塔尼亚草或也被称为“Diss”，是地中海地区一种多年生丰富的植物，具有对生态友好材料具有吸引力的特点. 这项工作旨在通过评估Diss纤维元素作为聚合物基质（生物复合材料）增强材料的用途来突出其潜力. 因此，对未经处理和热处理的Diss纤维（纯碱、硅烷和乙酸）进行了人工提取和表征，以评价其表面状况、化学成分、力学性能和热稳定性. 研究结果表明，Diss纤维束具有直径小（89±22μm）、表面粗糙、有刺、密度低（0.93g/cm3）、抗拉强度可达270mpa等优点，具有广阔的应用前景. 此外，所采用的所有处理方法在纤维束的成纤率（直径可达到-40%）、表面状态、热稳定性和力学性能（杨氏模量可达到+60%，拉伸应力可达到+15%）方面都有所改善.

KEYWORDS:

• Natural fibers
• Diss fibers
• thermal properties
• mechanical properties
• microstructural analysis

关键词:

• 天然纤维
• 纤维
• 热性能
• 力学性能
• 微观结构分析

Acknowledgments

This research work has been conducted with the financial support of FEDER - Region Pays de la Loire in the framework of CIPTAP R&D project. Authors thank Camille Alvarado (INRA, BIA) for her skill and assistance in Acridine Orange microscopic preparation.

Additional information

Funding

This work was supported by the FEDER - Region Pays de la Loire.