两亲性聚合物修饰的大粒径金纳米粒子的相转移  

Phase-Transfer of Large Gold Nanoparticles Modified by Amphiphilic Polymers

作　　者：唐强[1] 徐保明[1] 胡传群[1] 陈宇[2] 

机构地区：[1]湖北工业大学化学与环境工程学院,武汉430068 [2]天津大学理学院化学系,天津300071

出　　处：《高分子通报》2011年第12期103-108,共6页Polymer Bulletin

摘　　要：通过对线性聚乙烯亚胺(linear polyethylenimine LPEI)的棕榈酸改性和季铵化制备了具有两亲性结构的线性聚合物。两亲性线性聚合物在没有诸如硫醇、四正辛基溴化铵(TOAB)等其它化学物质的协助下,通过氨基和柠檬酸钠负离子之间的离子键或氢键相互作用,成功将粒径为18nm柠檬酸钠保护的金纳米粒子(AuNP)从水相转移至氯仿相。金纳米粒子氯仿溶液的紫外-可见光光度法和动态光散射检测结果发现,金纳米粒子的尺寸大小和形状在相转移过程中得到了很好的保持,透射电镜检测结果显示两亲性线性聚合物在金纳米粒子的表面能够形成相对均匀、密集的壳层。更为突出的是,两亲性线性聚合物稳定的金纳米粒子能够以固体形态在室温条件下保存至少35天。Amphiphilic linear polymers were prepared by palmitic acid mobified and quaternization of linear polyethylenimine （LPEI）. Through the ionic bond or hydrogen bond interactions between the amino and citric acid anion,amphiphilic linear polymers has been successfully employed to transfer the 18nm citrate-protected gold nanoparticles（AuNP） from water into chloroform without aid of other compounds such as thiols,TOAB and so on. The chloroform solutions of AuNPs were characterized by UV-vis spectrometry and dynamic light scattering. It was found that the sizes and shapes of the gold nanoparticles were preserved during the phase-transfer process, the product of palmitic acid modified LPEI afterquaternization （LPEI15k-C160 -3 N＋） exhibited higher efficiency in transferring the large AuNPs. furthermore the amphiphilic linear polymers could form relatively homogeneous and densely packed shell around the gold core revealed by transmission electron microscopy. Moreover, the AuNPs capped with the amphiphilic linear polymers could be also stored in dryness for at least 35 days at room temperature.

关 键 词：线性聚乙烯亚胺 金纳米粒子 两亲性 相转移 

分 类 号：TB383.1[一般工业技术—材料科学与工程]