萱藻褐藻胶的提取及流变学特性的研究  

Study on extraction methodology of alginates from Scytosiphon lomentsrius and its rheological characteristics

作　　者：许小娟[1] 付晓婷[1] 林洪[1] 许加超[1] 高昕[1] 

机构地区：[1]中国海洋大学食品科学与工程学院,山东青岛266003

出　　处：《食品工业科技》2012年第13期88-91,共4页Science and Technology of Food Industry

基　　金：山东省优秀中青年科学家科研奖励基金(BS2010NJ019)

摘　　要：以萱藻为原料,采用碱提法提取褐藻胶,探讨萱藻褐藻胶的最佳漂白工艺条件以及褐藻胶溶液的流变学特性。实验结果表明:用次氯酸钠做漂白剂,每600mL滤液加3mL有效氯浓度为4%的次氯酸钠溶液,即3:600,pH10.5左右,漂白时间40min,漂白温度35℃,能够得到较满意的漂白效果;萱藻褐藻胶溶液粘度随剪切速率的增加而降低,是假塑性流体,具有触变性;褐藻胶溶液具有粘弹性,在低频率区域体系以粘性为主,高频率区域体系以弹性为主;此外,温度、溶液质量分数、盐、蔗糖也会影响褐藻胶溶液的粘度。Extraction method and the optimal bleaching condition of alginates from Scytosiphon Iomentsfius and their rheological characteristics were studied in this research. The results indicated that the optimal bleaching condition was conducted as follows-4% of sodium hypochlorite solution with pH of 10.5 was added to the alginate solution with a ratio of 3：600,and heated at 35℃ for 40min. The viscosity of sodium alginate solution from Scytosiphon Iomentsrius decreased with increasing of shearing rate,thus the sodium alginate solution behaved as pseudoplastic fluid and had thixotropism. The sodium alginate solution from Scytosiphon Iomentsrius possessed viscoelasticity,which primarily behaved viscocity in the low frequency area system and elasticity in the higher one. Furthermore,the viscosity of the sodium alginate solution also was influenced by temperature and the concentrations of alginate,salt and sucrose.

关 键 词：萱藻 褐藻胶 提取 漂白 流变学特性 

分 类 号：TS254.1[轻工技术与工程—水产品加工及贮藏工程]