藻油DHA微膠囊的乳化噴霧干燥法制備及在乳品中的應(yīng)用.pdf

1、華中農(nóng)業(yè)大學(xué)碩士學(xué)位論文藻油DHA微膠囊的乳化噴霧干燥法制備及在乳品中的應(yīng)用姓名：解秀娟申請學(xué)位級別：碩士專業(yè)：食品工程指導(dǎo)教師：謝筆鈞20090601華中農(nóng)業(yè)大學(xué)專業(yè)學(xué)位碩十學(xué)位論文AbstractAlthoughdocosahexaenoicacid(DHA)ispolyunsaturatedfattyacidwithgoodnutritionandhealthfunctions，itisunstableandisdifficult

2、todissolveinwaterAsaresult，itisnoteasytoadditintofoodsastheoriginalstatus，whichlimitsitsapplicationinthefoodfieldInthisstudy，microcapsulewaspreparedbyemulsificationspraydryingusingalgaloilDHAasrawmaterialThestabilityofpr

3、oduct，physicochemicalpropertiesofmicrocapsulewellmaterial，optimizationofspraydryingcondition，andtheapplicationofDHAmicrocapsuleinmilkindustrywereinvestigatedThemainresultsaleasfollows：1Wallmaterialpropertiesarecriticalfa

4、ctorsthataffectthemicroencapsulationduringmicrocapsdepreparationbyemulsificationspray—dryingmethodEmbeddingeffectsofdifferentwallmaterialswerecomparedandfoundthat，whenusingmodifiedstarchaswallmaterial，wecanproduceexcelle

5、ntmicrocapsulewithbothofsurfaceandexudationoilcontentaslowas02％andwithembeddedrateofmorethan99％W11ichareattributedtosomepropertiesofmodifiedstarchincludingexcellentemulsificationandfilm—formingproperties，lowviscosity，eas

6、ytodehydrationanddrybutlessstickytocontaiher2ProcessofmicroencapsulationalsoplaysallimportantroleinensuringqualityofpowderproductsEffectsofhomogeneouspressureandtemperatureofinletandoutletwindofmicroencapsulationonqualit

7、yofpowderproductswerestudiedbythesingle—factoranalysis，andfurtheridentifiedbyorthogonalexperimentalTheoptimizedprocessconditionsweregotasfollowing，homogeneouspressure351VlPa，temperatureofinletwind180℃，temperatureofoutlet

8、wind80℃3TheshelflifeofDHAmicrocapsuleWasevaluatedTheresultsindicatedthatDHAmicrocapsuleproductpreparedintheexperimentcouldkeepmeirqualityat45／62。Cfor90／24days，andtheirsensorypropertieswerestillacceptableFurthermore，thesu