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1.
鱼油(南海低值鱼)微胶囊化工艺的研究   总被引:7,自引:0,他引:7  
壳聚糖、海藻酸钠为壁材,以自制鱼油为芯材,采用复凝聚法制备鱼油微胶囊产品。以产品的外形,粒径大小、产率、效率、缓释性能作为评价指标,系统地得出制备鱼油微胶囊的最佳工艺条件。结果表明,鱼油微胶囊的最佳工艺条件为:芯壁比为1:2,壁材(壳聚糖:海藻酸钠)比为2.5:1,乳化剂用量为0.1wt%,成二醛用量为3.5ml,pH为9,反应温度为60℃,乳化搅拌速度为800r/s。  相似文献
2.
Complex coacervation of soybean protein isolate and chitosan   总被引:3,自引:0,他引:3  
Huang GQ  Sun YT  Xiao JX  Yang J 《Food chemistry》2012,135(2):534-539
The formation of coacervates between soybean protein isolate (SPI) and chitosan was investigated by turbidimetric analysis and coacervate yield determination as a function of pH, temperature, time, ionic strength, total biopolymer concentration (TB(conc)) and protein to polysaccharide ratio (R(SPI/Chitosan)). The interaction between SPI and chitosan yielded a sponge-like coacervate phase and the optimum conditions for their coacervation were pH 6.0-6.5, a temperature of 25 °C, and a R(SPI/Chitosan) ratio of four independently of TB(conc). NaCl inhibited the complexation between the two biopolymers. Fourier transform infrared spectroscopy (FTIR) revealed that the coacervates were formed through the electrostatic interaction between the carboxyl groups of SPI (-COO(-)) and the amine groups of chitosan (-NH(3)(+)), however hydrogen bonding was also involved in the coacervation. Differential scanning calorimetry (DSC) thermograms indicated raised denaturation temperature and network thermal stability of SPI in the coacervates due to SPI-chitosan interactions. Scanning electron microscopy (SEM) micrographs revealed that the coacervates had a porous network structure interspaced by heterogeneously sized vacuoles.  相似文献
3.
明胶/壳聚糖复凝聚法制备八角茴香油微胶囊   总被引:2,自引:0,他引:2  
李强  吴彩娥 《中国粮油学报》2007,22(3):122-125,130
以八角茴香油为心材,明胶和壳聚糖为壁材,采用复凝聚法制备了八角茴香油微胶囊,并对影响微胶囊形成的主要因素如壳聚糖脱乙酰度、系统浓度、壁材与心材的比例、pH值、乳化剂浓度等进行了试验,确定了比较适宜的反应条件。  相似文献
4.
维生素A微胶囊化工艺的研究   总被引:1,自引:0,他引:1  
王华  王泽南  赵晓光 《食品科学》2006,27(11):366-369
研究了复凝聚法制备凝聚液、喷雾干燥法进行干燥的维生素A微胶囊化的工艺.以微胶囊包埋率为评价指标进行单因素及正交试验,得到最佳工艺条件为:pH值4.2、乳化时间20min、芯壁比3:1、反应温度4 5℃.  相似文献
5.
以壳聚糖-海藻酸钠为壁材制备纸用微囊   总被引:1,自引:0,他引:1  
刘文波  宋湛谦  于钢 《中国造纸》2005,24(10):17-19
采用天然高分子物质壳聚糖、海藻酸钠为壁材,无色染料油溶液为芯材,通过复合凝聚法制备纸用微囊.通过初步实验确定了主要影响因素,利用正交实验分析探讨了乳化、絮凝、固化过程中的最佳工艺条件.  相似文献
6.
The coacervates of gelatin (G) and gum arabic (GA) were prepared in order to elucidate their pH-dependent complexation mechanism. Three biopolymers mixing ratios (MRs) (G/GA of 2:1, 1:1 and 1:2, w/w) were chosen to disclose their individual coacervates transition pattern for morphology and size distribution. The results showed that with pH decline, the coacervates became larger for the MR of 1:1 and 1:2; whereas, the trend went oppositely as to the MR of 2:1. Through the composition analysis of coacervates, such transition pattern was found to be consistent with the conversion rate of GA. Coacervates prepared by the MR of 2:1 were chosen to further investigate the formation mechanism at the molecular level. During the complexation process with pH decrease, G molecules experienced a conformational change from a flexible pattern to an ordered PPII helix. On the other hand, GA went through a transition from partly ordered PPII helix to relatively disordered conformation, and then converted to a more compact structure, called PPI helix. Such molecular transformation for both G and GA finally contributed to the smaller coacervates with pH decline, which coincided perfectly with the morphology evolution.  相似文献
7.
复凝聚法制备葱油香精微胶囊   总被引:1,自引:0,他引:1  
探讨了以明胶、阿拉伯胶为壁材,用复凝聚法制备葱油香精微胶囊的工艺条件。分析了芯壁质量比、pH值、固化时间对微胶囊成囊效果的影响,制备葱油香精微胶囊的适宜工艺为:芯壁材质量比1∶2;pH值4.15;固化剂为谷氨酰胺转氨酶,用量为明胶质量的25%,固化时间12h。采用喷雾干燥法(进风温度185℃,出风温度80℃,进料温度50℃)可以制备出葱油香精微胶囊粉状产品,产品的含水率为2.87%,包埋率为89.55%。  相似文献
8.
酵母浸膏-壳聚糖-海藻钠为壁材制备纸用微囊   总被引:1,自引:0,他引:1  
采用天然高分子物质酵母浸膏-海藻酸钠-壳聚糖为壁材,无色染料油溶液为芯材,通过复凝聚法制备纸用微囊。以产品的外形,粒径大小、产率、包埋率、价格作为评价指标,优化了制备纸用微囊的工艺条件。结果表明此工艺合理、可行,且工艺环保、经济。  相似文献
9.
辣椒红色素复凝聚微囊化工艺研究   总被引:1,自引:0,他引:1       下载免费PDF全文
目的 以大豆分离蛋白(soybean protein isolate, SPI)和壳聚糖(chitosan, CH)为壁材,采用复凝聚法制备辣椒红色素(paprika red pigment,PRP)微胶囊。方法 以微胶囊的包埋产率和包埋效率为指标,研究搅拌转速、复凝聚pH、温度、时间及SPI/CH比对微囊化效果的影响。结果 SPI/CH复凝聚法制备PRP微胶囊的最佳工艺为:将均匀的PRP乳状液冷却至室温,按SPI:CH质量比4:1加入0.6%的CH溶液,此时固形物浓度为1.5%,用10% NaOH溶液调节混合液的pH至6.3,25 ℃、300 r/min下搅拌15 min得到微胶囊悬浮液,此时微胶囊的包埋产率为90.05%,效率为95.08%。所得微胶囊大小不均一,多以球形形式存在。结论 SPI/CH复凝聚体系可用于PRP的微囊化。  相似文献
10.
复凝聚法制备松籽油微胶囊工艺优化及其氧化稳定性分析   总被引:1,自引:0,他引:1  
郭阳  包怡红  赵楠 《食品科学》2017,38(18):229-236
以明胶与阿拉伯胶为壁材,采用复凝聚法包埋松籽油制备松籽油微胶囊。考察壁材比(明胶与阿拉伯胶体积比)、芯壁比、壁材质量分数、复凝聚时间对微胶囊包埋率的影响,通过正交试验优化微胶囊制备工艺,并对制备的微胶囊理化特性及氧化稳定性进行分析。结果表明松籽油微胶囊制备的优化工艺条件为壁材比2∶1、芯壁比2∶3、壁材质量分数2%、复凝聚时间50?min,在此条件下微胶囊包埋率达到87.23%。制备的松籽油微胶囊含水率为5.1%,溶解度为98.09%,具有较好的溶解性;通过傅里叶转换红外光谱及扫描电子显微镜分析证明了微胶囊的形成;差示扫描量热分析结果显示,微胶囊热溶解温度较高,在室温下热稳定性良好。包埋后的松籽油经加速贮藏实验表明微胶囊化可以提高松籽油的氧化稳定性,延长松籽油贮藏期。  相似文献
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