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Extraction and application of cellulose microfibers from Washingtonia palm as a reinforcement of starch film
Journal of Plastic Film & Sheeting ( IF 3.1 ) Pub Date : 2021-06-04 , DOI: 10.1177/87560879211023093
Laila Sajid 1, 2 , Oussama Azmami 2, 3 , Zakia EL Ahmadi 1 , Abbès Benayada 1 , Aicha Boukhriss 4 , Sanaa Majid 5 , Said Gmouh 3
Affiliation  

This work aims to optimize the industrial extraction conditions of cellulose microfibers (CMFs) from Washingtonia palm fiber for application in starch bio-composite films. The CMF extraction was a mixed process that combines caustic soda treatment with hydrogen peroxide bleaching in a stirred thermostatic bath. To study the yield, whiteness index and α-cellulose content, three variables were selected; NaOH and H2O2 concentrations and treatment time. The optimum was determined using a Response Surface Methodology (RSM) approach for samples treated for 70 min with 5.21% NaOH and 5.54% H2O2. The optimized CMF was used to produce Starch/CMF bio-composite films with higher mechanical and barrier performance, which increased by 300% and 31%, respectively. Moreover, its moisture absorption and water solubility decreased by about 24% and 26%, respectively after adding 20 wt% CMF. In fact, morphological results showed that the higher CMF in the Starch/CMF20 leads to the heterogeneous CMF distribution and agglomerates resulting in weakened starch films. As a result, the extracted CMF can be a competitive nanofabrication filler.



中文翻译:

从华盛顿棕榈中提取纤维素微纤维作为淀粉膜增强剂的应用

本工作旨在优化华盛顿棕榈纤维中纤维素微纤维 (CMF) 的工业提取条件,以用于淀粉生物复合薄膜。CMF 萃取是一种混合工艺,在搅拌恒温浴中将烧碱处理与过氧化氢漂白相结合。为了研究产量、白度指数和 α-纤维素含量,选择了三个变量;NaOH和H 2 O 2浓度和处理时间。对于用 5.21% NaOH 和 5.54% H 2 O 2处理 70 分钟的样品,使用响应面方法 (RSM) 方法确定最佳值. 优化后的CMF用于生产具有更高机械性能和阻隔性能的淀粉/CMF生物复合薄膜,分别提高了300%和31%。此外,添加20wt%的CMF后,其吸湿性和水溶性分别降低了约24%和26%。事实上,形态学结果表明,淀粉/CMF 20 中较高的 CMF导致不均匀的 CMF 分布和团聚,导致淀粉膜变弱。因此,提取的 CMF 可以成为具有竞争力的纳米加工填料。

更新日期:2021-06-04
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