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首页> 外文期刊>Journal of Applied Polymer Science >Scanning Electron Microscopy Study of Chemically Modified Coir Fibers
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Scanning Electron Microscopy Study of Chemically Modified Coir Fibers

机译：化学改性椰壳纤维的扫描电子显微镜研究

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摘要

Chemical-surface modification of coir fibers was done by dewaxing, using an alkali treatment (5% and 10% NaOH), vinyl grafting with methyl methacrylate (MMA) and cyanoethylation. The chemically modified fibers were characterized by Fourier transform infrared (FTIR) spectroscopy. In addition, the surface features of untreated, dewaxed, alkali-treated, grafted, and cyanoethylated coir fibers were stud, ied using scanning electron microscopy (SEM). Progressive changes in surface morphol- ogy were observed. SEM observations showed the removal of tyloses from the surface of coir as a result of alkali treatment (5% ), resulting in a rough fiber surface with regularly spaced pits. At a lower percentage of grafting (PMMA), the surfaces became more or less uniform, while the surfaces of the coir fibers with a higher percentage of grafting were increasingly covered with grafted materials, resulting in canal-like cavities be- tween the overgrowths of the grafted materials on the unit cells. Cyanoethylated coir-fiber surfaces showed an insufficient deposit of cyanoethyl groups. SEM analysis of the samples was corroborated by measurements of a mechanical property (maximum stress at break).
机译：椰壳纤维的化学表面改性是通过使用碱处理（5％和10％NaOH）进行脱蜡，用甲基丙烯酸甲酯（MMA）接枝乙烯基和氰基乙基化完成的。化学改性的纤维通过傅里叶变换红外（FTIR）光谱进行表征。另外，使用扫描电子显微镜（SEM）对未处理的，脱蜡的，碱处理的，接枝的和氰乙基化的椰壳纤维的表面特征进行钉扎。观察到表面形态学的逐步变化。 SEM观察表明，由于碱处理（5％），从椰壳表面除去了酪醇，导致纤维表面粗糙且凹坑间隔均匀。在较低的接枝率（PMMA）下，表面变得或多或少均匀，而具有较高接枝率的椰壳纤维表面越来越多地被接枝材料覆盖，从而导致在过度生长期之间形成类似运河的空洞。嫁接在单位细胞上的材料。氰乙基化的椰壳纤维表面显示出氰乙基的沉积不足。通过测量机械性能（断裂时的最大应力）证实了样品的SEM分析。

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