苯乙醛纳米微胶囊的制备及特性表征  

Preparation and characterization of phenylacetaldehyde nano-microcapsules

作　　者：吴彦[1] 熊亚妹 孟丹丹[2] 胡志忠[1] 刘鸿[1] 宁振兴[1] 许春平[2] WU Yan;XIONG Ya-mei;MENG Dan-dan;HU Zhi-zhong;LIU Hong;NING Zhen-xing;XU Chun-ping(Technical Center of China Tobacco Guangxi Industrial Co.Ltd,Nanning,Guanxi 530001 China;College of Food and Biology Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002 China)

机构地区：[1]广西中烟工业有限责任公司技术中心,广西南宁530001 [2]郑州轻工业学院食品与生物工程学院,河南郑州450001

出　　处：《化学研究与应用》2020年第12期2199-2208,共10页Chemical Research and Application

基　　金：自然基金联合基金项目(U1604176);广西中烟合作项目(20171011)。

摘　　要：苯乙醛是一种常用的香料,但其在空气中易变质,为提高其稳定性,本实验以苯乙醛为芯材、海藻酸钠为壁材制备纳米微胶囊,以纳米微胶囊粒径为指标,通过单因素实验与响应面分析法对壁材用量、香精用量和乳化剂用量等因素进行优化。然后采用激光粒度分析仪、扫描电子显微镜、热重分析仪对纳米微胶囊进行表征。结果表明:(1)最佳的制备条件:乳化剂为吐温80,海藻酸钠浓度为0.561 mg·mL^-1,香精添加量为0.251%,乳化剂添加量为0.076%,在此条件下制备出的纳米微胶囊粒径约为150 nm。(2)通过对比苯乙醛、海藻酸钠、纳米微胶囊三者的红外光谱图分析可知,苯乙醛纳米微胶囊包埋成功。(3)纳米微胶囊扫描电镜结果显示,干燥后的纳米微胶囊形状近似椭圆形或不规则球形,粒径大多数分布在200 nm以下。(4)通过热稳定性分析可知,纳米微胶囊在能够延缓苯乙醛的释放速率,延长留香时间。Phenylacetaldehyde is a commonly used flavor,but it is easy to deteriorate in the air.In order to improve its stability,this experiment used phenylacetaldehyde as core material and sodium alginate as wall material to prepare nano-microcapsules.The particle size of nano microcapsules was used as the index,and single factor experiment and response surface analysis were used to optimize the factors such as wall material consumption,flavor dosage and emulsifier dosage.Then the nanocapsules were characterized by laser particle size analyzer,scanning electron microscope and thermogravimetry.The results showed that:(1)The optimal preparation conditions were:the emulsifier was Twain 80,the concentration of sodium alginate was 0.561 mg·mL^-1,the flavor content was 0.251%,and the emulsifier dosage was 0.076%.Under these conditions,the particle size of the nano-microcapsule was about 150nm.(2)By comparing with the infrared spectra of phenylacetaldehyde,sodium alginate and nanocapsules,the encapsulation of phenylacetaldehyde nanocapsules was proved to be successful.(3)The results of scanning electron microscopy showed that the shape of the dried nanocapsules was approximately elliptical or irregular spherical,and most of the particles were distributed below 200 nm.(4)By thermal stability analysis,nanocapsules could delay the release rate of phenylacetaldehyde effectively and prolong the retention time.

关 键 词：苯乙醛 海藻酸钠 纳米微胶囊 粒径 

分 类 号：O625.41[理学—有机化学]