将高锰酸钾负载在活性炭上制备保鲜剂,以纸基为承载体,采用浆内添加法制备保鲜纸。利用红外光谱(FTIR)、X 射线衍射(XRD)、热重分析(TGA)和扫描电子显微镜(SEM)等手段对保鲜剂和保鲜纸进行表征。FTIR 分析表明,饱和高锰酸钾负载活性炭使活性炭表面的含氧官能团含量增加,保鲜剂和纸基之间的结合属物理结合;XRD 测试表明高锰酸钾会破坏活性炭的晶型结构,加入保鲜剂后保鲜纸的结晶度下降。由TGA 曲线可知,保鲜纸热分解的起始温度和最大分解速率温度都低于对照组,这是因为保鲜纸的结晶度降低。SEM 测试结果表明,保鲜剂的加入使保鲜纸表面变得粗糙。
Preservative is made by modified activated carbon which contains potassium permanganate, the paper is used as carrier, and the preservative paper is developed by the method of putting preservatives into pulp. Analytical methods such as the infrared spectrum (FTIR), the X ray diffraction (XRD), the thermogravimetric analysis (TGA) and the scanning electron microscope (SEM) are used to study the structures of the preservative and the preservative paper. The FTIR analysis shows that the activated carbon loaded with the saturated potassium permanganate contains more oxygen functional groups on the surface, the combination of the antistaling agent and the paper serves as the physical bond. The XRD analysis shows that the potassium permanganate could destroy the crystal structure of the activated carbon, the crystallization degree of the preservative paper is decreased after the antistaling agent is added. From the TGA curve, it is seen that the temperature of the thermal decomposition of the fresh paper is lower than that of the control group, which is due to the decrease of the crystallinity of the preservative paper. The result of the SEM test shows that the antistaling agent could make the preservative paper surface coarse.
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