【摘要】：為提高大豆胚芽油的氧化穩(wěn)定性,本文采用噴霧干燥法制備微膠囊化大豆胚芽油粉末油脂,并研究了不同芯材、壁材比例及噴霧干燥條件變化對(duì)微膠囊化大豆胚芽油理化特性、微觀結(jié)構(gòu)及氧化穩(wěn)定性的影響,采用的表征方法包括:粒徑分布、乳液穩(wěn)定性、噴霧干燥制得的微膠囊包埋率、水分含量、掃描電鏡及氧化穩(wěn)定性等。結(jié)果顯示:噴霧干燥前,3號(hào)(壁材∶芯材為3∶5)和6號(hào)(壁材∶芯材為2∶3)樣品穩(wěn)定性較高,平均粒徑分布均勻且較小。在單因素實(shí)驗(yàn)的基礎(chǔ)上,采用Design-Expert軟件對(duì)實(shí)驗(yàn)結(jié)果建立數(shù)學(xué)模型,噴霧干燥后樣品條件:當(dāng)壁材含量25%、油脂含量15%及出口溫度為160℃時(shí)樣品的狀態(tài)最佳。外形顆粒較圓整、飽滿,且表面光滑、裂紋較少,并且在室溫下非常穩(wěn)定,此時(shí)包埋率為97.15%。該結(jié)果說(shuō)明壁材阿拉伯膠與芯材大豆胚芽油具有最適比例,可制備成微膠囊化大豆胚芽油,在此條件下所制取的微膠囊可防止大豆胚芽油氧化,延長(zhǎng)油脂保質(zhì)期。
[Abstract]:In order to improve the oxidation stability of soybean germ oil, the microencapsulated soybean germ oil powder oil was prepared by spray drying method. The physicochemical properties of microencapsulated soybean germ oil were studied under different core material, wall material ratio and spray drying conditions. The effects of microstructures and oxidation stability were investigated by means of particle size distribution, emulsion stability, encapsulation rate of microcapsules prepared by spray drying, moisture content, SEM and oxidation stability. The results showed that before spray drying, the stability of samples no. 3 (wall material: core material: 3:5) and 6 (wall material: core material: 2:3) was higher, and the average particle size distribution was uniform and smaller. On the basis of single factor experiment, the mathematical model of the experimental results was established by using Design-Expert software. After spray drying, the sample conditions were as follows: when the wall material content was 25%, the oil content was 15% and the outlet temperature was 160 鈩，

本文編號(hào)：2287168