Using Polystyrene-block-poly(acrylic acid)-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization

作者：Wang Yawen; Song Xiohui; Wang Hong; Chen Hongyu^*

来源：Jove-Journal of Visualized Experiments, 2015, (101): e52954.

DOI：10.3791/52954

• Chemistry
• Issue 101
• Nanoparticle
• chain
• self-assembly
• encapsulation
• polymer
• homo-polymerization
• co-polymerization
• polystyrene-block-poly(acrylic acid)

We present a template-free method for "polymerizing" nanoparticles into long chains without side branches. A variety of nanoparticles are encapsulated in polystyrene-block-poly(acrylic acid) (PSPAA) shells and then used as monomers for their self-assembly. Spherical PSPAA micelles upon acid treatment are known to assemble into cylindrical micelles. Exploiting this tendency, the core-shell nanoparticles are induced to aggregate, coalesce, and then transform into long chains. When more than one type of nanoparticles are used, random and block "copolymers" of nanoparticles can be obtained. Detailed procedures are reported for the PSPAA encapsulation of nanoparticles, homo-and co-polymerization of the core-shell nanoparticles, separation and purification of the resulting nanoparticle chains. Transformations of single-line chains into doubleand triple-line chains are also presented. The synergy between the polymer shell and the embedded nanoparticles leads to an unusual chain-growth polymerization mode, giving long nanoparticle chains that are distinct from the products of the traditional step-growth aggregation process.

• 出版日期2015-7
• 单位南阳理工学院