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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (2): 179-184. 上一篇    下一篇

研究简报

以两亲性共聚物为模板溶胶-凝胶法制备WO3多孔薄膜及其 氢致变色特性的研究

丁进月a,b 钟 良b 赵巧玲b 黄 晋b 张淑媛a 马 志*,b

  

  1. (a郑州大学化学系 郑州 450052)
    (b中国科学院上海有机化学研究所 上海 200032)

  • 投稿日期:2008-09-14 修回日期:2008-10-15 发布日期:2009-01-28
  • 通讯作者: 马志

Preparation of Porous WO3 Films by Sol-Gel Process Using Amphiphilic Copolymer as Template and Their Hydrogen Gasochromic Properties

Ding, Jinyue a,b Zhong, Liang b Zhao, Qiaoling b
Huang, Jin b Zhang, Shuyuan a Ma, Zhi *,b
  

  1. (a Department of Chemistry, Zhengzhou University, Zhengzhou 450052)
    (b Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032)
  • Received:2008-09-14 Revised:2008-10-15 Published:2009-01-28
  • Contact: Ma, Zhi

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2047

被引次数

19

报道了以六氯化钨为原料, 以两亲性的无规共聚物聚苯乙烯-co-聚烯丙醇(PS-co-PAAL)和三嵌段共聚物聚氧乙烯-b-聚氧丙烯-b-聚氧乙烯(PEO-b-PPO-b-PEO)为模板, 采用溶胶-凝胶法制备了WO3多孔薄膜. 利用热重分析仪(TGA)、粉末X射线衍射仪(XRD)、扫描电子显微镜(SEM)、原子力显微镜(AFM)等表征手段, 研究了模板和热处理温度对薄膜孔结构的影响; 并通过H2敏测试以及利用紫外可见分光光度计(UV), 研究了薄膜的氢敏性能和着色前后的透射光谱. 结果表明, 以无规共聚物PS-co-PAAL为模板制得的WO3薄膜, 经400 ℃热处理后, 可得到呈交联网状的多孔结构, 并表现出最佳的氢致变色性能.

关键词: 三氧化钨多孔薄膜, 溶胶-凝胶法, 两亲性共聚物模板, 氢致变色

Porous tungsten oxide films were prepared using a sol-gel process with the tungstic chloride as the source material using amphiphilic copolymers, poly(styrene-co-allyl alcohol) (PS-co-PAAL) and poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (PEO-b-PPO-b-PEO), as template respectively. The effect of polymer template and annealed temperature on the porous structure of the WO3 films was investigated by thermogravimetric analyzer (TGA), X-ray powder diffractometer (XRD), scanning electron microscope (SEM) and atomic force microscope (AFM). The H2 gasochromic property and the change of visible transmittance before and after bleached were characterized by the test of H2 gas-sensing with combination of UV-visible spectrophotometer. The results indicated that the WO3 films prepared using PS-co-PAAL as template and annealed at 400 ℃ had crosslinked and porous structure, and showed the best H2 gasochromic property.

Key words: porous tungsten oxide film, sol-gel process, amphiphilic copolymer template, hydrogen gasochromic