以天然淀粉为内核的硒纳米颗粒的研制及其应用  

Preparation and Application of Starch-Selenium Nanoparticle

作　　者：肖苏尧[1] 童春义[1] 刘选明[1] 邹洪波[1] 俞丹密[1] 唐冬英[1] 赵李剑[1] 

机构地区：[1]湖南大学生命科学与技术研究院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2006年第6期106-109,共4页Journal of Hunan University:Natural Sciences

基　　金：湖南省生物纳米技术重大专项经费资助(03NKY1001)

摘　　要：利用氧化还原体系把高价硒还原为具有生物活性的红色零价硒,以生物材料淀粉为内核,采用纳米制备技术,得到核壳型的淀粉硒纳米颗粒(St-Se0NP).用透射电子显微镜和Zeta-sizer电位分析仪对颗粒进行表征,发现所制备的颗粒具有核壳结构,平均粒径为50 nm左右,电性呈中性.淀粉硒纳米颗粒作为植物营养调节剂应用于巨峰葡萄植株,成熟葡萄果实中的硒含量比对照提高了5倍,糖份提高了30%,钙含量提高了40%,而酸含量则降低了30%,大大改善了葡萄的风味.研究还对硒纳米颗粒的作用机制进行了初步讨论,认为较普通硒化物,淀粉硒纳米颗粒在植物体内形成了缓释,提高了硒在植物体内的作用效果.This paper introduces the synthesis of Starch-Selenium nanoparticle through redox reaction using nanotechnology in redox system, with natural starch as the templet. The particles were characterized with a transmission electron microscope and Zeta-Sizer measurements. The results showed that the particles prepared had core-shell structure, the average sizes of the core-shell particles were below 50 nm in diameter, and the particles were zero charge. Starch-selenium nanoparticle was a plant effective nourishment regulator, it improved the quality of grapy fruits： a very small amount of nanoparticles increased the concentration of selenium for about 5 times, the concentration of sugar increased by about 30 %, and that of calcium increased by about 40 %, but the concentration of acid decreased hy 30%, compared with contrast teams. At the same time, the working mechanism of starch-selenium nanoparticles was discussed. Compared with inorganic selenium compounds, nanoparticles were released more slowly, so that the contributing time was prolonged in plants.

关 键 词：氧化还原 淀粉-硒纳米颗粒 核壳结构 巨峰葡萄(Kyoho) 

分 类 号：O613.52[理学—无机化学]