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以铁盐和葡萄糖为原料,采用有机凝胶-热分解法制备了碳基(Fe/C)中空纤维。通过傅里叶变换红外光谱(FTIR)、X射线衍射(XRD)、扫描电子显微镜(SEM)和振动样品磁强计(VSM)等测试技术对纤维前躯体的结构,热处理产物的物相、形貌以及纤维的磁性能进行了表征。400℃热处理后得到Fe/C纤维纯相,且纤维平均直径在1μm左右,具有良好的中空结构和长径比,饱和磁化强度(Ms)为24.5AM2/kg。以所制备的Fe/C纤维为载体,利用磺酸化处理后得到碳基固体酸(Fe/C-SO3H)纤维。催化试验表明:Fe/C-SO3H纤维具有良好的催化效果,在醇酸比为18∶1时,10%的剂量的纤维样品,反应6h油酸的转化率可达90.1%。因此,所制备的磁性碳基纤维有望在废油脂转化生物柴油领域有良好的运用。
Using iron salt and glucose as raw materials, carbon-based (Fe / C) hollow fibers were prepared by organic-gel-pyrolysis method. The structure of the fiber precursor, the phase and shape of the heat-treated product were characterized by FTIR, XRD, SEM and VSM. Appearance and fiber magnetic properties were characterized. After heat treatment at 400 ℃, the pure Fe / C fibers were obtained. The mean diameter of the fibers was about 1μm. The hollow fibers had a good hollow structure and aspect ratio. The saturation magnetization (Ms) was 24.5AM2 / kg. The prepared Fe / C fiber was used as a carrier to obtain a carbon-based solid acid (Fe / C-SO3H) fiber by sulfonation treatment. The catalytic tests showed that the Fe / C-SO3H fiber has a good catalytic effect. The conversion rate of oleic acid reached 90.1% when the ratio of alkoxydic acid was 18:1. Therefore, the prepared magnetic carbon-based fiber is expected to have a good application in the field of waste fat conversion biodiesel.