离子/非离子表面活性剂对脲醛树脂包覆碘酸钙微胶囊形貌及性能的影响  

Effect of lonic/nonionic surfactant on morphology and properties of microcapsules with calcium iodate encapsuled by PUF

作　　者：朱丹丹 曹鼎鼎 蒲侠[1] 龚圣[1] 舒绪刚[1,2] 周新华[1,2] ZHU Dandan;CAO Dingding;PU Xia;GONG Sheng;SHU Xungang;ZHOU Xinhua(College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China;Key Laboratory of Agricultural Green Fine Chemicals of Guangdong Higher Education Institution, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China)

机构地区：[1]仲恺农业工程学院化学化工学院,广东广州510225 [2]仲恺农业工程学院,广东省普通高校农用绿色精细化学品重点实验室,广东广州510225

出　　处：《仲恺农业工程学院学报》2020年第4期29-35,共7页Journal of Zhongkai University of Agriculture and Engineering

基　　金：广州市产学研协同创新重大专项民生科技专题(201605121218497)资助项目.

摘　　要：为隔绝饲用碘酸钙在贮存过程中与还原性物质,如维生素C的反应,以脲醛树脂为壁材,碘酸钙晶体为芯材,采用原位聚合一步法制备固态囊芯微胶囊.研究碘酸钙晶体对十二烷基磺酸钠(Sodium dodecyl sulfonate,SDBS)、十六烷基三甲基溴化铵(Cetyltrimethylammonium bromide,CTAB)和乙基苯基聚乙二醇(Octylphenoxypolyethoxyethanol,NP-40)3种不同类型表面活性剂的吸附行为,观察3种表面活性剂对微胶囊形貌的影响.采用光学显微镜、傅里叶红外光谱和紫外分光光度计对微胶囊进行表征,测定微胶囊的包覆率和碘酸钙含量,测试脲醛树脂在维生素C溶液中对碘酸钙的保护效果.研究结果表明碘酸钙晶体对3种表面活性剂的吸附曲线呈S型,其中CTAB的吸附量最高;以SDBS为表面活性剂制备的微胶囊包覆率高,囊壁较厚,形状规则;包覆完整的微胶囊能很好的保护碘酸钙不被维生素C还原;微胶囊的包覆率为28.6%,碘酸钙含量为42.9%.To avoid the reaction of calcium iodate Ca(IO3)2 with reducing substances,such as vitamin C(VC)during storage in feeds,microcapsules were prepared by in-situ polymerization with poly(urea-formaldehyde)(PUF)as the shell material and calcium iodate as the core material.Investigate the adsorption behavior of calcium iodate crystals on 3 different types of surfactants(Sodium dodecyl sulfate,cetyltrimethylammonium bromide,octylphenoxypolyethoxyethanol),and observe the effects of 3 types of surfactants on the microcapsule morphology.Optical microscopy,Fourier transform infrared spectrometer and ultraviolet spectrophotometer were used to characterize the microcapsules,and the coating rate and content of calcium iodate were measured.The protective effect of urea-formaldehyde resin on calcium iodate in the Vc solution was tested.The results showed that the adsorption curve of calcium iodate crystals to three kinds of surfactants was s-shaped,and the adsorption amount of CTAB was the highest;The microcapsules prepared with SDBS as surfactant have high enveloped rate,thick wall and regular shape;The intact microcapsule can protect calcium iodate from being reduced by Vc;The coating ratio of microcapsule was 28.6%and the content of calcium iodate was 42.9%.

关 键 词：表面活性剂 微胶囊 碘酸钙 脲醛树脂 

分 类 号：TQ323.3[化学工程—合成树脂塑料工业]