Study on the mechanical properties of ramie fiber/polypropylene composites prepared by hot pressing after the carding machine mixing,Polymer Composites

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Study on the mechanical properties of ramie fiber/polypropylene composites prepared by hot pressing after the carding machine mixing
Polymer Composites ( IF 4.8 ) Pub Date : 2024-03-23 , DOI: 10.1002/pc.28339
Yangxi Jin ₁ , Weizhi Huang ₁ , Yi Guo ₁ , Jiaqi Deng ₁ , Haoyang Yu ₁ , Bobing He ₁

Affiliation

A growing variety of composites utilize natural plant fibers with naturally occurring veins structured hierarchically in an effort to reduce dependence on petroleum-based materials. In this article, ramie fibers were extracted by alkaline delignification. Then, ramie fibers and PP matrix, were prepared in filament form and an amino-silane coupling agent KH550, and maleic anhydride grafted polypropylene were added to improve interfacial compatibility. Ramie fiber/polypropylene fiber-reinforced polymer composites (FRC) were prepared by hot pressing after using a carding machine. This method preserves the structure and length of ramie fibers to a large extent, thus greatly improving the mechanical properties of the material. After optimization, the FRC prepared from plant fibers of 2 cm length and 60% content had a density of 0.95 g/cm³, showed an increase in tensile and flexural strength of 276% and 339%, respectively, compared to the pure PP matrix. The specific strength of the FRC in the work was higher than galore FRC prepared from talc, carbon fiber, other plant fibers, and so forth. The FRC has a wide range of potential applications due to its own low-cost, lightweight, and high-performance, and is highly feasible in replacing the current polymers in the preparation of numerous everyday items.

中文翻译：

梳理机混炼热压制备苎麻纤维/聚丙烯复合材料力学性能研究

越来越多的复合材料利用具有分层结构的天然纹理的天然植物纤维，以减少对石油基材料的依赖。在本文中，通过碱脱木素法提取苎麻纤维。然后，将苎麻纤维和PP基体制备成长丝形式，并添加氨基硅烷偶联剂KH550，并添加马来酸酐接枝聚丙烯以改善界面相容性。采用梳理机热压制备苎麻纤维/聚丙烯纤维增强聚合物复合材料(FRC)。该方法在很大程度上保留了苎麻纤维的结构和长度，从而大大提高了材料的力学性能。优化后，长度为2 cm、含量为60%的植物纤维制备的FRC密度为0.95 g/cm ³ ，拉伸强度和弯曲强度分别提高了276%和339%，与纯PP基体相比。该工作中FRC的比强度高于大量由滑石粉、碳纤维、其他植物纤维等制备的FRC。 FRC因其自身的低成本、轻量化和高性能而具有广泛的潜在应用，并且在制备众多日常用品中替代现有聚合物具有很强的可行性。

更新日期：2024-03-23

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