Goyal Anubha, Kumar Ashavani, Patra Prabir K, Mahendra Shaily, Tabatabaei Salomeh, Alvarez Pedro J J, John George, Ajayan Pulickel M
Department of Mechanical Engineering and Materials Science, Rice University, Houston TX 77005.
Macromol Rapid Commun. 2009 Jul 1;30(13):1116-22. doi: 10.1002/marc.200900174. Epub 2009 Jun 2.
We demonstrate a simple one-step method for synthesizing noble metal nanoparticle embedded free standing polydimethylsiloxane (PDMS) composite films. The process involves preparing a homogenous mixture of metal salt (silver, gold and platinum), silicone elastomer and the curing agent (hardener) followed by curing. During the curing process, the hardener crosslinks the elastomer and simultaneously reduces the metal salt to form nanoparticles. This in situ method avoids the use of any external reducing agent/stabilizing agent and leads to a uniform distribution of nanoparticles in the PDMS matrix. The films were characterized using UV-Vis spectroscopy, transmission electron microscopy and X-ray photoemission spectroscopy. The nanoparticle-PDMS films have a higher Young's modulus than pure PDMS films and also show enhanced antibacterial properties. The metal nanoparticle-PDMS films could be used for a number of applications such as for catalysis, optical and biomedical devices and gas separation membranes.
我们展示了一种简单的一步法来合成嵌入贵金属纳米颗粒的独立聚二甲基硅氧烷（PDMS）复合薄膜。该过程包括制备金属盐（银、金和铂）、硅氧烷弹性体和固化剂（硬化剂）的均匀混合物，然后进行固化。在固化过程中，硬化剂使弹性体交联，同时将金属盐还原以形成纳米颗粒。这种原位方法避免了使用任何外部还原剂/稳定剂，并导致纳米颗粒在PDMS基质中均匀分布。使用紫外可见光谱、透射电子显微镜和X射线光电子能谱对薄膜进行了表征。纳米颗粒-PDMS薄膜比纯PDMS薄膜具有更高的杨氏模量，并且还显示出增强的抗菌性能。金属纳米颗粒-PDMS薄膜可用于许多应用，如催化、光学和生物医学设备以及气体分离膜。
