辐射接枝共聚物XG-g-NVP对葡萄籽原花青素的吸附和解吸性能  

Adsorption and Desorption Performance on Grape Seed Proanthocyanidins of Xanthan Gum-g-N-vinylpyrrolidone Prepared by Irradiation

作　　者：丁文博[1,2] 李彦杰[1] 哈益明[2] 包亚莉[1] 刘培玲[1] 

机构地区：[1]内蒙古工业大学化工学院,呼和浩特010051 [2]中国农业科学院农产品加工研究所,北京100193

出　　处：《中国食品学报》2017年第12期50-57,共8页Journal of Chinese Institute Of Food Science and Technology

基　　金：国家自然科学基金项目(31260370);内蒙古自然科学基金项目(2012MS1202)

摘　　要：采用共辐射接枝法制备黄原胶-N-乙烯基吡咯烷酮接枝共聚物(XG-g-NVP),研究不同因素对原花青素溶液的吸附解吸性能的影响。结果表明,当接枝率为557%,吸附时间为60 min,吸附剂量为100 mg,溶液pH为酸性时,共聚物对原花青素具有较好的吸附效果,吸附过程可自发进行,吸附行为符合二级动力学方程和Freundlich吸附等温式。以红外图谱和扫描电镜分析证实了吸附前后产物的结构及形貌特征。当解吸时间和乙醇体积分数分别为40 min和65%时,对原花青素具有较好的解吸效果。研究表明XG-g-NVP共聚物可作为葡萄籽原花青素的高效吸附材料。Xanthan gum-g-N-vinylpyrrolidone graft copolymer（XG-g-NVP）was prepared by, irradiation, then to study the different factors of proanthocyanidins solution on the adsorption and desorption performance. The results showed that the copolymer had the better proanthocyanidins adsorption capacity when the grafting ratio was 557%, the adsorption time of 60 min, adsorbent amount of 100 mg and the pH of solution was acidic. The adsorption process was spontaneously occurred, and the adsorption behavior was consistent with both the second orderrate equation and Freundlich isotherm.The molecular structure and morphology before and after adsorption were analyzed and confirmed by IR and ESM. The proanthocyanidins had the better desorption capacity when desorption time and ethanol concentrations were 40 min and65%. The results suggested that XG-g-NVP copolymer could be used as a highly effective adsorbent for grape seed proanthocyanidins.

关 键 词：XG-g-NVP 原花青素 吸附 解吸 

分 类 号：O647.3[理学—物理化学] TS201.2[理学—化学]