期刊
SOFT MATTER
卷 13, 期 37, 页码 6542-6554出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7sm01169e
关键词
-
类别
资金
- National Science Foundation [DMR-1505976, CHE-1228904]
2,2'-Bipyridine-terminated poly(dimethylsiloxane)s (bpyPDMS) with number average molecular weights, MN, of 3300, 6100, 26 200, and 50 000 g mol(-1) were synthesized. When mixed with Fe(BF4) 2 at low concentrations, red solutions formed with UV-vis spectra that match those of iron(II) tris(2,20-bipyridine) (Fe(bpy)(3)(2+)). Upon solvent evaporation, Fe(bpy)(3)(2+) crosslinked PDMS networks (bpyPDMS/ Fe(II)) formed, and were studied using oscillating shear rheometry. The shear storage moduli (0.084 to 2.6 MPa) were found to be inversely proportional to the MN of the PDMS, though the storage moduli at low molecular weights greatly exceeded the storage moduli of comparable covalently crosslinked PDMS networks. The shear storage moduli exhibited the characteristic rubbery plateau up to similar to 135 degrees C. Films of bpyPDMS/Fe(II) coated onto electrodes were found to be electrochemically active, especially so when the PDMS M-N is low. The Fe(bpy)(3)(2+) crosslinks can be reversibly oxidized over similar to 500 nm away from the electrode surface in the presence of a suitable electrolyte.
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