摘要
用 PMMA预聚合单体与 Li Cl O4粉末以不同比例直接混合均匀 ,固化成 3mm厚的板 ,以它为靶 ,在纯氩气气氛及 rf -溅射沉积条件下制备各种薄膜 ,用双电层电容常数法研究它们的离子导电性能。在室温下测试 ,外加信号 1 2 0 m V,频率 40 0 Hz。实验结果表明 ,当氩气压强 (PA r)为4.7— 7.2 Pa,靶掺杂质量比为 1 0 % ,射频功率密度为 3.9— 4.2 W/ cm2 时得到的薄膜为离子导体。当氩气压强为 6.0 Pa,射频功率密度为 4.2 4 W/ cm2 时 ,膜的双电层电容常数为 7.0× 1 0 -2 μf/ cm2 ,离子导电性能最好 ,其电阻率 >1 0 1 1Ω .cm。利用该离子导体薄膜制备的可变反射电致变色镜 ,Al(40 nm) /α- WO3(1 0 0 nm) / PMMA +Li Cl O4(1 60 nm) / Ni O(80 nm) / ITO/ glass,着色态和漂白态可见光平均反射比分别为 0 .2 3和 0 .69。利用红外光谱 (1 90 0— 50 0 cm-1 )对纯 PMMA和 PMMA +Li Cl O4离子导体进行分析 ,发现离子导体膜“- C- O- CH3”侧链的吸收峰在 1 1 85.7cm-1 ,非离子导体膜的吸收峰在 969.2 cm-1处 ,前者侧链具有较强的极性。
mm PMMA+LiClO 4 targets were prepared using prepolymer monomer of PMMA and LiClO 4 with different mass ratio.The ion conduction properties for the films deposited by PVD(rf sputtering)in pure Ar atmosphere were studied with electric double layer capacity parameter method.The capacity parameters were measured at room temperature and applied signal of 120mV and 400Hz.The results show that the films obtained by target of 10% LiClO 4 on the conditions of Ar pressure 4.7～7.2Pa and power density of 3.9～4.2W/cm 2 are ion conductors,and the electric double layer capacity parameter of the film deposited at 6.0Pa and 4.2W/cm 2 is 7.0×10 -2 μ f/cm 2,the ion conduction property is the best,and its resistivity is more than 10 11 Ωcm.A variable reflection electrochromic mirror with PMMA+LiClO 4 ionconductor,Al(40nm) /α WO 3(100nm)/PMMA+LiClO 4(160nm)/NiO(80nm)/ITO/glass,was fabricated.Its average visible reflectances of the colored and bleached states are 0.23 and 0.69 respectively.The infrared spectra(1900～500cm -1 )of the pure PMMA and PMMA+LiClO 4ion conductor layers show that the absorption peak of side chain“ C O CH 3”in the ion conductor lies at 1185.7cm -1 and the polarity of the side chain is enhanced,that in PMMA lies around 969.2cm -1 .
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2000年第2期181-185,共5页
Acta Energiae Solaris Sinica
关键词
预聚合单体
有机薄膜
PMMA
离子导电性能
prepolymer monomer,ion conductor,electric double layer capacity parameter,side chain
