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首页> 外文期刊>Journal of Composite Materials >Modification of pineapple leaf fibers and graft copolymerization of acrylonitrile onto modified fibers
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Modification of pineapple leaf fibers and graft copolymerization of acrylonitrile onto modified fibers

机译：菠萝叶纤维的改性和丙烯腈在改性纤维上的接枝共聚

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摘要

Raw pineapple leaf fibers (PALFs) were chemically modified by scouring, NaOH treatment, and bleaching (NaClO2). The graft copolymerization of synthetic acrylonitrile monomer onto bleached PALFs was carried out in aqueous medium using potassium persulfate (K2S2O8/FeSO4) as a redox initiator. The maximum grafting level at optimum conditions, namely, monomer concentration, initiator concentration, catalyst concentration, reaction time, and temperature have been determined. The main objective of this study is to decrease the amorphous region of lignocellulose in PALFs and improve its hydrophobic nature by incorporation of synthetic polymer of polyacrylonitrile and mechanical properties. The modified and grafted fibers were characterized by Fourier transform infrared spectroscopy, scanning electron microscope, thermogravimetric analysis, and X-ray diffraction study techniques. The moisture content and tensile strength properties were also evaluated for their environmental and mechanical performances.
机译：通过煮练，NaOH处理和漂白（NaClO2）对菠萝叶纤维（PALF）进行化学修饰。使用过硫酸钾（K2S2O8 / FeSO4）作为氧化还原引发剂，在水性介质中将合成的丙烯腈单体接枝到漂白的PALF上。确定了最佳条件下的最大接枝量，即单体浓度，引发剂浓度，催化剂浓度，反应时间和温度。这项研究的主要目的是通过引入聚丙烯腈合成聚合物和机械性能来减少PALF中木质纤维素的无定形区域并改善其疏水性。通过傅立叶变换红外光谱，扫描电子显微镜，热重分析和X射线衍射研究技术对改性和接枝纤维进行了表征。还评估了水分含量和拉伸强度特性的环境和机械性能。

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