| 郑秋闿,范晶晶,王林同,郭焕美.化学通报,2015,78(3):254-258. |
| 二氢杨梅素对高分子材料的抗氧化作用 |
| Antioxidation of Dihydromyricetin in Polymer |
| 投稿时间：2014-07-19 修订日期：2014-08-30 |
| DOI： |
| 中文关键词: 天然抗氧剂 二氢杨梅素 氧化诱导温度 |
| 英文关键词:Natural antioxidant, Dihydromyricetin, Oxidation induction temperature |
| 基金项目:国家星火计划项目(2012GA740030)山东省自然科学基金项目(ZR2013BL015)和潍坊市科技发展计划项目(20111118)资助 |
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| 中文摘要: |
| 通过差示扫描量热仪(DSC)和热失重分析仪(TGA)测定了二氢杨梅素(DMY)的热稳定性。测定了添加DMY的不同高分子材料的氧化诱导温度(OIT*),并与添加相同质量分数工业抗氧剂Irganox B215的样品进行了比较。实验结果表明DMY在230℃以下稳定性良好,可用于加工温度低于230℃的各种高分子材料的加工过程,添加DMY的各种高分子材料的抗氧化性能优于添加Irganox B215的样品。从DMY的结构入手对其抗氧化作用机理进行了分析,DMY的特殊结构,特别是分子中羟基的数量和位置,是其具有强抗氧剂性的根本原因。DMY无毒、高效,有望作为新型天然抗氧剂得到广泛应用。 |
| 英文摘要: |
| Thermal stability of dihydromyricetin (DMY), extracted from Ampelopsis grossedentata, was measured by differential scanning calorimeter (DSC) and thermogravimetric analysis (TGA). The antioxidative properties of DMY in different solid polymers were evaluated by measuring the oxidation induction temperature (OIT*). The antioxidative efficiency was compared with Irganox B215. The results showed that DMY shows a good thermal stability below 230 ℃, which could therefore be used on the polymers whose processing temperatures are lower than 230 ℃, DMY is more efficient than the synthetical antioxidant Irganox B215. Based on the structural features, antioxidation mechanisms of DMY were studied. The high antioxidant activity of DMY is attributed to the special chemical structure, including the quantity and positions of the hydroxy groups in the molecule. DMY is harmless and high effective to be a good natural antioxidant. |
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