Investigation of Chemical Treatments to Enhance the Mechanical Properties of Natural Fiber Composites

IF 3.4 4区 化学 Q2 POLYMER SCIENCE International Journal of Polymer Science Pub Date : 2023-07-14 DOI:10.1155/2023/4719481
Farooq Rauf, M. Umair, K. Shaker, Yasir Nawab, Tehseen Ullah, Sheraz Ahmad
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Abstract

A sustainable approach to composites is leading to the use of natural fibers rather than synthetic materials, like carbon or glass, for reinforcement. However, the higher moisture absorption of natural fibers impairs the composite’s mechanical properties. Therefore, to improve the mechanical properties, some chemical treatments like silane and fluorocarbon can be performed to reduce the moisture absorption of natural fibers. In this study, flax was used as reinforcement, and epoxy was used as a matrix. In the first part of the study, flax reinforcement was treated with different concentrations of silane (20, 40, and 60 g/L) and fluorocarbons (80, 100, and 120 g/L). Moisture regains (MRs), absorbency, and tensile strength were measured at reinforcement levels. According to the results, reinforcements treated with 60 g/L silane (S3) and 120 g/L fluorocarbons (F3) exhibited the lowest MR values of 7.09% and 3.06%, respectively, whereas water absorbency was significantly reduced. The sample treated with 120 g/L fluorocarbons required 300 seconds extra time to absorb the water as compared with the untreated sample, whereas samples S3 and F3 showed an increase in tensile strength by 20.16% and 34.80% when compared with untreated reinforcement flax reinforcement. In the second part of the study, untreated and treated flax reinforcements were combined with an epoxy matrix for composite fabrication. MR and mechanical tests (tensile, flexural, and Charpy impact tests) were performed. Results revealed that treated flax-reinforced composites exhibited lower MR values 0.86% for F3 and 0.42% for S3, respectively. The tensile, flexural, and pendulum impact strengths of silane-treated reinforced composite sample C.S3 were increased by 15.07%, 117%, and 20.01%, respectively, compared with untreated reinforced composite samples. Consequently, both chemical treatments improve composite mechanical performance as well as service life.
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化学处理提高天然纤维复合材料力学性能的研究
复合材料的可持续发展方法是使用天然纤维而不是合成材料,如碳或玻璃,来增强。然而,天然纤维的高吸湿性损害了复合材料的机械性能。因此,为了提高机械性能,可以进行硅烷和氟碳等化学处理,以减少天然纤维的吸湿性。本研究以亚麻为增强剂,环氧树脂为基体。在研究的第一部分,用不同浓度的硅烷(20、40和60 g/L)和碳氟化合物(80、100和120 g/L)处理亚麻增强纤维。在加固水平上测量回潮率(MRs)、吸湿性和抗拉强度。结果表明,添加60 g/L硅烷(S3)和120 g/L碳氟化合物(F3)处理的增强材料MR值最低,分别为7.09%和3.06%,吸水率显著降低。经120 g/L氟碳化合物处理的样品比未处理的样品吸水时间增加300秒,而样品S3和F3的抗拉强度比未处理的亚麻增强剂分别提高了20.16%和34.80%。在研究的第二部分,未经处理和处理的亚麻增强剂与环氧基复合材料的制备。进行MR和机械试验(拉伸、弯曲和Charpy冲击试验)。结果表明,处理后的亚麻增强复合材料的MR值较低,F3的MR值为0.86%,S3的MR值为0.42%。硅烷处理后的增强复合材料试样C.S3的拉伸、弯曲和钟摆冲击强度分别比未处理的增强复合材料试样提高了15.07%、117%和20.01%。因此,两种化学处理都能提高复合材料的机械性能和使用寿命。
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来源期刊
CiteScore
6.10
自引率
0.00%
发文量
55
审稿时长
>12 weeks
期刊介绍: The International Journal of Polymer Science is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles on the chemistry and physics of macromolecules.
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