评估化学改性葫芦纤维在聚酯复合材料制造中的应用

Ernest Mbamalu Ezeh, Ezeamaku U Luvia, Onukwuli O D
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引用次数: 0

摘要

目的葫芦纤维(GF)是一种可生物降解的天然纤维材料,具有优异的机械性能和较高的抗拉强度。由于天然纤维具有可再生性、低成本、低密度和生物可降解性等各种优点,近年来在复合材料中使用天然纤维越来越受欢迎。葫芦纤维就是这样一种已被确定为复合材料潜在增强材料的天然纤维。然而,葫芦纤维具有低表面能和疏水性,因此很难与聚酯等基体材料结合。为了克服这一问题,有人提出了化学改性葫芦纤维的解决方案。化学处理是改善天然纤维性能最广泛使用的方法之一。本研究评估了将化学改性葫芦纤维加入聚酯复合材料进行工业制造的可行性和有效性。本研究的目的是考察化学改性 GF 在聚酯复合工程材料生产中的应用。设计/方法/途径 本研究旨在评估化学改性葫芦纤维在复合材料制造中改善葫芦纤维与聚酯树脂粘附性的效果,具体方法是将 GF 的重量百分比从 5% 调整到 20%。研究涉及使用氢氧化钠(NaOH)、高锰酸盐(KMnO4)和乙酸(CH3COOH)偶联剂通过表面改性制备化学处理的葫芦纤维。研究了改性纤维和复合材料的机械性能。研究结果FTIR 表征显示,NaOH 处理导致纤维素解聚,使羟基和羧基显著增加,显示出表面功能基团的改善;KMnO4 处理使纤维表面氧化,导致表面氧化物基团的形成;醋酸处理引起的变化主要影响酯基和羟基。SEM 研究表明,NaOH 处理改变了葫芦纤维的表面形态,引入了空隙并降低了亲水倾向。与未处理的纤维相比,随着改性化学品浓度的增加,改性葫芦纤维的拉伸强度逐渐增加。与未增强的聚酯相比,拉伸强度提高了 181.5%,弯曲强度提高了 56.63%。这项研究成果将有助于人们了解化学改性葫芦纤维作为复合材料增强材料的潜力,并为开发可持续复合材料提供启示。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evaluation of the application of chemically adapted gourd fibre in polyester composite fabrication
Purpose Gourd fibres (GF) are a natural biodegradable fibre material with excellent mechanical properties and high tensile strength. The use of natural fibres in composite materials has gained popularity in recent years due to their various advantages, including renewability, low cost, low density and biodegradability. Gourd fibre is one such natural fibre that has been identified as a potential reinforcement material for composites. However, it has low surface energy and hydrophobic nature, which makes it difficult to bond with matrix materials such as polyester. To overcome this problem, chemically adapted gourd fibre has been proposed as a solution. Chemical treatment is one of the most widely used methods to improve the properties of natural fibres. This research evaluates the feasibility and effectiveness of incorporating chemically adapted gourd fibre into polyester composites for industrial fabrication. The purpose of this study is to examine the application of chemically modified GF in the production of polyester composite engineering materials. Design/methodology/approach This work aims to evaluate the effectiveness of chemically adapted gourd fibre in improving the adhesion of gourd fibre with polyester resin in composite fabrication by varying the GF from 5 to 20 wt.%. The study involves the preparation of chemically treated gourd fibre through surface modification using sodium hydroxide (NaOH), permanganate (KMnO4) and acetic acid (CH3COOH) coupling agents. The mechanical properties of the modified fibre and composites were investigated. It was then characterized using scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) to determine the changes in surface morphology and functional groups. Findings FTIR characterization showed that NaOH treatment caused cellulose depolymerization and caused a significant increase in the hydroxyl and carboxyl groups, showing improved surface functional groups; KMnO4 treatment oxidized the fibre surface and caused the formation of surface oxide groups; and acetic acid treatment induced changes that primarily affected the ester and hydroxyl groups. SEM study showed that NaOH treatment changed the surface morphology of the gourd fibre, introduced voids and reduced hydrophilic tendencies. The tensile strength of the modified gourd fibres increased progressively as the concentration of the modification chemicals increased compared to the untreated fibres. Originality/value This work presents the designed composite with density, mechanical properties and microstructure, showing remarkable improvements in the engineering properties. An 181.5% improvement in tensile strength and a 56.63% increase in flexural strength were got over that of the unreinforced polyester. The findings from this work will contribute to the understanding of the potential of chemically adapted gourd fibre as a reinforcement material for composites and provide insights into the development of sustainable composite materials.
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