期刊
ADVANCED FUNCTIONAL MATERIALS
卷 30, 期 9, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201908458
关键词
composite materials; elemental gold; polymeric matrix; polystyrene; scaling behavior
类别
资金
- ETH Zurich [ETH-43 17-1]
- SNSF [206021_183298]
- ScopeM/Swiss Federal Institute of Technology ETHZ
- Swiss National Science Foundation (SNF) [206021_183298] Funding Source: Swiss National Science Foundation (SNF)
A new 18 karat light gold, composed of gold single crystals, amyloids, and a polymer latex matrix is developed. It is similar to a glassy plastic, yet lighter than aluminum and of use in watches, jewelry, radiation shielding, catalysis, and electronics. The material is prepared via a hydrogel precursor dried into an aerogel. Annealing of the polystyrene matrix under vacuum gives rise to a homogeneous template. The final apparent density and porosity of the material depend directly on the volumetric concentration of the starting solution used for hydrogel formation. After annealing, a homogeneous microstructure is obtained in which the shining gold single crystal platelets are evenly embedded in a polystyrene matrix. The material has a glass transition temperature of approximate to 105 degrees C which allows for annealing and molding above this temperature. A general scaling behavior is found for the Young's modulus of the material with the density. The Young's modulus of the material with a density of 1.7 g cm(-3) is approximate to 50 MPa. The density and stiffness, as well as the color, of the material can be tuned depending on the final application.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据