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1、环糊精稳定紫苏籽油Pickering乳液的制备及其稳定性李学红1,2*陆勇1郝晓萍1刘延奇1,2JaneJay-lin1,3*(郑州轻工业大学食品与生物工程学院1;河南郑州,450002)(河南省食品生产与安全创新中心2,河南郑州,450002)(美国爱荷华州立大学人类营养系3,埃姆斯,爱荷华州,美国)摘要:紫苏籽油具有很好的食用及保健功能,将其制成稳定的可涂抹乳液可增加其应用的多样性。本文利用β-环糊精的乳化特性,通过高速均质法将紫苏籽油制成Pickering乳液,观察乳液的微观结构、测定其粒度和Zeta电位,研究体系添加糖、盐、黄原胶以及pH值对乳液稳定性的影响,并对
2、其粘度特性进行了初步测定。结果表明,紫苏籽油经β-环糊精乳化后可形成稳定的水包油型pickering乳液,油滴呈标准球形,粒径在数十纳米范围;外水相添加5%蔗糖或0.5%黄原胶可增加、添加食盐则降低乳液的粘度及稳定性,酸性条件不利于乳液的稳定;流变特性结果显示,环糊精稳定的紫苏籽油乳液为剪切变稀的假塑性流体,在25-80℃条件下乳液呈现类似奶油状特性。关键词:Pickering乳状液β-环糊精紫苏籽油稳定性流变特性中图分类号:文献标识码:A文章编号:PreparationofPerillaSeedOilEmulsionStabilizedbyCyclodextrinand
3、itsStabilityLiXuehong*1,2LuYong1HaoXiaoping1LiuYanqi1,2JaneJay-lin*1,3(SchoolofFoodandBioengineering,ZhengzhouUniversityoflightindustry1,Zhengzhou450002,China)(HenanCollaborativeInnovationCenterofFoodProductionandSafety2,Zhengzhou450002,China)(DepartmentofHumanNutriention,IowaStateUnivers
4、ity3,Ames,Iowa,USA)AbstractPerillaseedoilhashighnutritionalvalueandhealthfunctions,whichwillhavemoreapplicationpatternsifbeingpreparedintospreadableemulsion.Inthispaper,thePerillaoilPickeringemulsificationsystemwithβ-cyclodextrin(β-CD)asemulsifierbyhigh-speed homogeneous shearingmethodwas
5、prepared,themicrostructure,particlesizeandZetapotentialoftheemulsionweremeasured,andtheeffectofvariousaddingcomponentsonthestabilityandrheologyoftheemulsionwasinvestigated.TheresultsshowedthatthePerillaoilPickeringemulsionstabilizedbyβ-CDisoil-in-watertypewithsphericaldispersionparticlein
6、dozensofnanometersofparticle size.Additionof5%sugar,0.5%xanthangumandweakly alkalinewater-phasecanhelptoincrease,1%~3%saltdecreasebothviscosityandstabilityoftheemulsions.RheologyresultsindicatedthatPerillaoilPickeringemulsionwithoilwaterratioof7:3behaved as non-Newtonian shear-thinning,an
7、dhavecreamypropertiesat25~80℃.KeywaordsPickeringemulsion,β-cyclodextrin,perilla seed oil,Stability,rheology基金项目:2018年河南省科技攻关项目(182102110095)收稿日期:2019-2-20作者简介:李学红,女,1969生,教授,粮食油脂与植物蛋白通信作者:JaneJay-lin,女,1954年生,教授,碳水化合物工程。IPickering乳液是以微纳米固体颗粒为稳定剂的乳状液体系,相比于传统液体表面活性剂乳液