INFLUENCE OF Na-MMTDOPED ON STRUCTURE AND PHOTOCHROMISM OF PMA/PVP NANOCOMPOSITE FILMS

ZOU Zhiming; WANG Chunyan; LIU Yan; FENG Wei; BAO Xinjian

doi:10.3724/SP.J.1105.2009.01192

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INFLUENCE OF Na-MMTDOPED ON STRUCTURE AND PHOTOCHROMISM OF PMA/PVP NANOCOMPOSITE FILMS

Research Article | 更新时间：2021-03-19

- INFLUENCE OF Na-MMTDOPED ON STRUCTURE AND PHOTOCHROMISM OF PMA/PVP NANOCOMPOSITE FILMS
- Acta Polymerica Sinica Issue 12, Pages: 1192-1197(2009)
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- DOI：10.3724/SP.J.1105.2009.01192
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- Published：20 December 2009，
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ZOU Zhiming, WANG Chunyan, LIU Yan, FENG Wei, BAO Xinjian. INFLUENCE OF Na-MMTDOPED ON STRUCTURE AND PHOTOCHROMISM OF PMA/PVP NANOCOMPOSITE FILMS. [J]. Acta Polymerica Sinica (12):1192-1197(2009)
DOI：

ZOU Zhiming, WANG Chunyan, LIU Yan, FENG Wei, BAO Xinjian. INFLUENCE OF Na-MMTDOPED ON STRUCTURE AND PHOTOCHROMISM OF PMA/PVP NANOCOMPOSITE FILMS. [J]. Acta Polymerica Sinica (12):1192-1197(2009) DOI： 10.3724/SP.J.1105.2009.01192.

摘要

将钠基膨润土(Na-MMT)掺入磷钼酸/聚乙烯基吡咯烷酮(PMA/PVP)体系中，利用透射电子显微镜(TEM)、原子力显微镜(AFM)、红外光谱(FTIR)、热重差热(TG-DTA)、紫外可见吸收光谱(UV-Vis)、X射线光电子能谱(XPS)等手段对复合薄膜的结构、热稳定性和光致变色性能进行了研究.红外光谱结果表明keggin结构磷钼酸和聚乙烯吡咯烷酮的基本结构在复合膜中仍然存在，复合膜中高分子与质子结合，以阳离子的形式与杂多阴离子成盐.Na-MMT的掺杂未对复合膜中PVP和PMA间的相互作用产生影响，但其掺杂提高了复合膜的热稳定性.在紫外光照下，复合膜由无色变为蓝色，杂多酸被还原产生杂多蓝.Na-MMT的掺杂降低了复合膜的光致变色响应性，这是由于多酸分子与钠基膨润土之间发生阳离子交换作用导致的.

Abstract

Abstract The phosphomolybdic acid/polyvinylpyrrolidone (PMA/PVP) nanocomposite films doped with sodiumbentonite (Na-MMT) were been prepared.The structure

thermal stability and photochromic behavior of these composite films were studied with TEM

AFM

FTIR

TG-DTA UV-Vis and XPS analysis.FTIR results showed the Keggin geometry of PMA and the structure of PVP were still preserved in the PMA/PVP composite films

and the salts were formed by combination of the ions based on the N atoms in the polymeric molecules and H+ of the polyanions.The doping of Na-MMT had no influence on the effect of PVP and PMA

but enhanced the thermal stability.Irradiated with UV light

the composite film changed from colorless to blue

heteropolyacid had been deoxidized to heteropolybules.The doping of Na-MMT debased the photochromic response of PMA/PVP hybrid films owing to the exchange of ions between PMA and Na-MMT.

关键词

钠基膨润土聚乙烯基吡咯烷酮薄膜光致变色

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