文章摘要
李进,武雪菲,米晓培,黄师荣,万慧.原儿茶酸烷基酯在水包油乳液中的抗氧化行为[J].精细化工,2019,36(6):
原儿茶酸烷基酯在水包油乳液中的抗氧化行为
Antioxidant Behavior of Protocatechuic Acid Alkyl Esters in Oil-in-water Emulsion
投稿时间:2018-07-13  修订日期:2018-12-08
DOI:
中文关键词: 原儿茶酸  酯化  乳液  抗氧化
英文关键词: Protocatechuic acid  Esterification  Emulsion  Antioxidant
基金项目:湖南省自然科学基金资助项目(2016JJ2120);“环境友好与资源高效利用化工新技术”湖南省高校2011协同创新中心资助项目
作者单位E-mail
李进 湘潭大学化工学院 476996440@qq.com 
武雪菲 湘潭大学化工学院  
米晓培 湘潭大学化工学院  
黄师荣 湘潭大学化工学院 hwangee@163.com 
万慧 湘潭大学化工学院  
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中文摘要:
      以原儿茶酸(PA)和系列正烷基醇为原料,采用直接酯化法合成了4种PA烷基酯。用IR和1HNMR表征了其结构,用DPPH法和ABTS法测定了其自由基清除能力,用Schaal烘箱实验考察了其在水包油乳液中的抗氧化效率。结果表明:PA酯化后增强了其对自由基清除能力,并且随着烷基链长的增加清除能力增强。PA酯化提高了其在水包油乳液中的抗氧化效率,并随烷基链长的增加,抗氧化效率先增大后下降,PA辛酯的抗氧化效率最佳。各种PA烷基酯在乳化剂吐温20的体积百分数4%、油与水体积比2:8的菜籽油乳液中的抗氧化效率最佳。与添加PA的乳液相比,添加PA烷基酯的乳液的共轭二烯(CD)值达到1的时间以及p-茴香胺(AV)值达到6的时间均显著增加了。
英文摘要:
      Four protocatechuic alkyl esters were synthesized by direct esterification reaction with protocatechuic acid and a series of alkyl alcohols as raw materials, and their structures were identified by infrared and 1HNMR spectrometers. The DPPH assay and ABTS assay were used to determine their free radical scavenging capacity. The Schaal oven test was used to determine their antioxidant efficiency in oil-in-water emulsion. Results showed that the free radical scavenging capacity of protocatechuic acid was enhanced by esterification, and it increased with the increase of alkyl chain length. Esterification of protocatechuic acid enhanced its antioxidant activity in the oil-in-water emulsion. As the alkyl chain length increased, the antioxidant efficiency increased first and then decreased, it reached the maximum at PA-C8. All protocatechuic alkyl esters have a maximum of antioxidant efficiency in rapeseed oil emulsions with the volume fraction of emulsifier 4% and the oil to water ratio 2:8. Compared with emulsions with the addition of protocatechuic acid, the time to reach a conjugated diene value of 1 and the p-anisidine value of 6 was significantly increased.
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