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用于智能窗户应用及建筑能源效率的EVA/VO₂层压薄膜的制备、表征及热致变色性能

Preparation, Characterization and Thermo-Chromic Properties of EVA/VO₂ Laminate Films for Smart Window Applications and Energy Efficiency in Building.

作者信息

Srirodpai Onruthai, Wootthikanokkhan Jatuphorn, Nawalertpanya Saiwan, Yuwawech Kitti, Meeyoo Vissanu

机构信息

School of Energy, Environment and Materials, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok 10140, Thailand.

Nanotec-KMUTT Center of Excellence on Hybrid Nanomaterials for Alternative Energy, King Mongkut's University of Technology (KMUTT), Thonburi, Bangkok 10140, Thailand.

出版信息

Materials (Basel). 2017 Jan 11;10(1):53. doi: 10.3390/ma10010053.

DOI:10.3390/ma10010053
PMID:28772413
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5344615/
Abstract

Thermochromic films based on vanadium dioxide (VO₂)/ethylene vinyl acetate copolymer (EVA) composite were developed. The monoclinic VO₂ particles was firstly prepared via hydrothermal and calcination processes. The effects of hydrothermal time and tungsten doping agent on crystal structure and morphology of the calcined metal oxides were reported. After that, 1 wt % of the prepared VO₂ powder was mixed with EVA compound, using two different mixing processes. It was found that mechanical properties of the EVA/VO₂ films prepared by the melt process were superior to those of which prepared by the solution process. On the other hand, percentage visible light transmittance of the solution casted EVA/VO₂ film was greater than that of the melt processed composite film. This was related to the different gel content of EVA rubber and state of dispersion and distribution of VO₂ within the polymer matrix phase. Thermochromic behaviors and heat reflectance of the EVA/VO₂ film were also verified. In overall, this study demonstrated that it was possible to develop a thermochromic film using the polymer composite approach. In this regard, the mixing condition was found to be one of the most important factors affecting morphology and thermo-mechanical properties of the films.

摘要

基于二氧化钒（VO₂）/乙烯-醋酸乙烯酯共聚物（EVA）复合材料的热致变色薄膜被研制出来。首先通过水热和煅烧工艺制备单斜晶系VO₂颗粒。报道了水热时间和钨掺杂剂对煅烧金属氧化物晶体结构和形貌的影响。之后，将1 wt%制备好的VO₂粉末与EVA化合物混合，采用两种不同的混合工艺。结果发现，通过熔融工艺制备的EVA/VO₂薄膜的机械性能优于通过溶液工艺制备的薄膜。另一方面，溶液浇铸的EVA/VO₂薄膜的可见光透过率百分比大于熔融加工复合薄膜。这与EVA橡胶的不同凝胶含量以及VO₂在聚合物基体相中的分散和分布状态有关。还验证了EVA/VO₂薄膜的热致变色行为和热反射率。总体而言，本研究表明使用聚合物复合方法开发热致变色薄膜是可行的。在这方面，混合条件被发现是影响薄膜形貌和热机械性能的最重要因素之一。

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掺镁 VO2 纳米颗粒的水热合成及其可见光透过率增强和金属-绝缘体相变温度降低。
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Synthesis, field-emission and electric properties of metastable phase VO2 (A) ultra-long nanobelts.亚稳相 VO2(A) 超长纳米带的合成、场发射及电性能。
Dalton Trans. 2011 Nov 7;40(41):10961-5. doi: 10.1039/c1dt10941c. Epub 2011 Sep 14.
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From VO2 (B) to VO2 (A) nanobelts: first hydrothermal transformation, spectroscopic study and first principles calculation.从 VO2 (B) 到 VO2 (A) 纳米带：首次水热转化、光谱研究和第一性原理计算。
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