Effect of processing conditions on the rheological and mechanical properties of composites based on a PBS matrix and enzymatically treated date palm fibers

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2022-10-26 DOI:10.1515/ipp-2022-4251

Rania Chaari, F. Kharrat, M. Khlif, C. Bradai, C. Lacoste, P. Dony

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引用次数: 1

Abstract

Abstract The rheological properties of biocomposites can change depending on the polymer, fiber type, fiber size and processing conditions. In this work, biodegradable PBS composites filled with raw and enzymatically treated date palm fibers were processed using an internal mixer. The influence of the processing conditions, namely filler concentration, rotor of the mixer rotational speed, as well as the type of the enzymatic fiber treatment on PBS (Poly Butylene Succinate)/date palm fiber composites were studied by measuring the torque and the temperature in real time during melt processing. A rheological analysis was also carried out by performing time and multi-wave-frequency sweeps. It was found that the stabilization torque increased with increasing fiber loading and rotor rotational speed, indicating a higher viscosity. An enhancement of the melting process occurred with modified fibers, which was explained by the decrease in the fiber diameter, denoting cellulose micro-fibrils separation by enzymes action. These composites were characterized by a better thermal resistance and mechanical stiffness compared to those based on raw fibers at the same loading rate.

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加工条件对PBS基与酶处理椰枣纤维复合材料流变学和力学性能的影响

摘要生物复合材料的流变性能会随着聚合物、纤维类型、纤维尺寸和加工条件的不同而变化。在这项工作中，使用内部混合器处理了填充有生的和酶处理的椰枣棕榈纤维的可生物降解PBS复合材料。通过实时测量熔融加工过程中的扭矩和温度，研究了填料浓度、搅拌器转子转速以及纤维酶处理方式等工艺条件对PBS（聚丁二酸丁二醇酯）/椰枣纤维复合材料的影响。还通过进行时间和多波频率扫描进行了流变学分析。研究发现，稳定扭矩随着纤维负载和转子转速的增加而增加，表明粘度更高。改性纤维的熔融过程增强，这可以通过纤维直径的减小来解释，表明纤维素微纤维通过酶的作用分离。与相同加载速率下基于原纤维的复合材料相比，这些复合材料具有更好的耐热性和机械刚度。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.