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Remarkable Ability To Modulate Light Transmittance and Block Heat in the Bleached State Combined in One Electrochromic Material: Highly Crystalline Polyaniline
Macromolecules ( IF 5.1 ) Pub Date : 2018-03-07 00:00:00 , DOI: 10.1021/acs.macromol.7b02543
Natalia Gospodinova 1 , Taras Skorokhoda 1 , Volodymyr Lobaz 1
Affiliation  

It is revealed that chain ordering strongly affects optical and electrochromic properties of polyaniline. Polyaniline film with 70% crystalline phase combines the remarkable ability to modulate the light transmittance (coloration efficiency of 150 cm2/C with a contrast ratio approaching 10 at λ = 633 nm) with an unprecedented “bright-cool” bleached state, where the polymer is highly transparent to light but has low transmittance for the most intense near-infrared irradiation. Compared to the recently developed dual-band electrochromic materials in which modulation of the near-infrared absorption is realized through plasmonic electrochromism of WO3–x nanoparticles, the highly crystalline polyaniline film demonstrates in the “bright-cool” regime a 10 times lower transmittance at 900 nm (1.6 vs 16%) with the same level (≈60%) of transmittance in the visible region. The coloration efficiency found here is almost 3-fold higher than commonly communicated for polyaniline.

中文翻译:

结合一种电致变色材料:高结晶度聚苯胺,在脱色状态下具有出色的调制透光率和阻隔热量的能力

揭示了链的排列强烈影响聚苯胺的光学和电致变色性质。具有70%晶相的聚苯胺薄膜具有出色的调制光透射能力(在λ= 633 nm处,着色效率为150 cm 2 / C,对比度达到10时),具有前所未有的“亮冷”漂白状态,其中该聚合物对光高度透明,但对于最强烈的近红外辐射却具有较低的透射率。与最近开发的双波段电致变色材料相比,后者通过WO 3– x的等离子体电致变色来实现近红外吸收的调制在纳米颗粒中,高结晶度的聚苯胺薄膜在“明亮冷却”模式下在900 nm处的透射率降低了10倍(1.6对16%),而可见光区域的透射率却相同(≈60%)。在此发现的着色效率比聚苯胺通常传递的着色效率高出近三倍。
更新日期:2018-03-07
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