A novel soft matter composite material for energy-saving smart windows: from preparation to device application

2015 ◽  
Vol 3 (20) ◽  
pp. 10738-10746 ◽  
Author(s):  
Yanzi Gao ◽  
Wenhuan Yao ◽  
Jian Sun ◽  
Huimin Zhang ◽  
Zhendong Wang ◽  
...  
Keyword(s):  
Composite Material ◽  
Liquid Crystal ◽  
Energy Conservation ◽  
Composite Film ◽  
Energy Saving ◽  
Vinyl Acetate ◽  
Soft Matter ◽  
Ethylene Vinyl Acetate ◽  
Smart Windows ◽  
Conservation Efficiency

A novel soft-matter composite film of ethylene-vinyl acetate and liquid crystal with an energy conservation efficiency of 40.4% is developed.

Self-Regulation of Infrared Using a Liquid Crystal Mixture Doped with Push–Pull Azobenzene for Energy-Saving Smart Windows

2021 ◽  
Vol 13 (4) ◽  
pp. 5028-5033
Author(s):  
Seung-Won Oh ◽  
Seung-Min Nam ◽  
Sang-Hyeok Kim ◽  
Tae-Hoon Yoon ◽  
Wook Sung Kim
Keyword(s):  
Liquid Crystal ◽  
Energy Saving ◽  
Self Regulation ◽  
Smart Windows ◽  
Crystal Mixture

Development of Composite Film for Improving Gas Permeable Properties

2010 ◽  
Vol 93-94 ◽  
pp. 647-650
Author(s):  
Suntaree Siraratprapa ◽  
Chuanchom Aumnete ◽  
Waranya Phompan ◽  
Suebpong Kongniam ◽  
Jittiporn Kruenate
Keyword(s):  
Composite Film ◽  
Vinyl Acetate ◽  
Gas Permeability ◽  
Ethylene Vinyl Acetate ◽  
High Porosity ◽  
Ph Indicator ◽  
Accurate Detection ◽  
Internal Mixer

Generally, a suitable polymer for using as pH indicator packaging should exhibit high porosity to provide a maximum gas permeability which lead to an accurate detection. Ethylene vinyl acetate (EVA) is normally used as such application. However, the gas permeability of EVA was fairly low as 1685.0940 cc/ (m2-day) which not good enough for used as pH indicator packaging application is. To increase a permeability of gas, high porous diatom incorporating with biopolymer was mixed into EVA polymer via internal mixer. It was found that the gas permeability of EVA filled porous diatom/biopolymer was increased up to 4204.2225 cc/ (m2-day). This property is one of the crucial properties for further design for pH indicator packaging in NHAM product.

scholarly journals One-step formation of infrared reflection microsheets via local photo-induced in situ polymerization

RSC Advances ◽  
2019 ◽  
Vol 9 (52) ◽  
pp. 30503-30508
Author(s):  
Jingxing Zhang ◽  
Zekun Guo ◽  
Yancong Feng ◽  
Yao Wang ◽  
Hao Li ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Energy Saving ◽  
Building Materials ◽  
In Situ Polymerization ◽  
Intelligent Building ◽  
Smart Windows ◽  
Infrared Reflection ◽  
One Step

Liquid crystal (LC) smart windows with adjustable reflectivity have been gradually applied in green and intelligent building materials for energy saving needs, but their applications are limited by their fundamental defects.

Performance Evaluation of Energy Saving and Emission Reduction

2013 ◽  
Vol 664 ◽  
pp. 1171-1175
Author(s):  
Wei Sun
Keyword(s):  
Energy Conservation ◽  
Energy Saving ◽  
Clustering Analysis ◽  
Emission Reduction ◽  
Evaluation System ◽  
Evaluation Model ◽  
Strategic Issues ◽  
Evaluation Indicator ◽  
Fuzzy Clustering Analysis ◽  
Conservation Efficiency

Energy saving and emission reduction are becoming strategic issues in China. Evaluation indicator of energy conservation efficiency and emission reduction is established in the paper. Fuzzy clustering analysis is used to build the evaluation model of energy conservation efficiency and emission reduction in the paper. The case is analyzed in the paper. It shows that the evaluation system of energy saving and emission reduction is scientific and objective.

Analysis of the External Window Retrofitting for Energy Saving and Economy in Wuhan's Residential Buildings

2013 ◽  
Vol 409-410 ◽  
pp. 566-569
Author(s):  
Gui Hua Hu ◽  
Yu Yun Li ◽  
Chun Zhi Zhang
Keyword(s):  
Energy Conservation ◽  
Energy Saving ◽  
Residential Buildings ◽  
Residential Building ◽  
Simulation Software ◽  
Building Energy Efficiency ◽  
Energy Saving Potential ◽  
Before And After ◽  
Conservation Efficiency ◽  
Energy Consumption Simulation

To discuss the technical and economic problems that emerges in building energy efficiency reform of existing residential building in Wuhan, the energy comsumption of typical existing buildings is calculated using the Dest-h energy consumption simulation software before and after energy conservation transformation. The energy saving potential of exterior window transformation is analyzed and the economy of multiple solutions on the grounds of the market cost is discussed. Finally, taking both energy conservation efficiency and economy into consideration, the optimal and supplementary scheme of exterior window retrofitting for residential buildings in Wuhan is obtained.

scholarly journals Влияние содержания технического углерода на фазовый состав и электропроводность полимерного композита

2020 ◽  
Vol 46 (24) ◽  
pp. 27
Author(s):  
А.М. Зюзин ◽  
А.А. Карпеев ◽  
Н.В. Янцен ◽  
В.В. Наумкин
Keyword(s):  
Electrical Conductivity ◽  
Composite Material ◽  
Phase Composition ◽  
High Temperature ◽  
Carbon Black ◽  
Vinyl Acetate ◽  
Relative Proportion ◽  
Ethylene Vinyl Acetate ◽  
Crystal Phase ◽  
Carbon Black Content

We investigated the effect of carbon black on the phase composition in a composite material based on ethylene vinyl acetate. The existence of an additional, and more high-temperature polymer crystal phase, the relative proportion of which is directly related to the carbon black content, was found. It is shown that peroxide saturation significantly affects the polymorphism of the composite and its electrical conductivity.

Preparation, Characterizations and Oxidation Stability of Polyethylene Coated Nanocrystalline VO2 Particles and the Thermo-Chromic Performance of EVA/VO2@PE Composite Film

2019 ◽  
Vol 19 (6) ◽  
pp. 3356-3366
Author(s):  
Onruthai Srirodpai ◽  
Jatuphorn Wootthikanokkhan ◽  
Saiwan Nawalertpanya
Keyword(s):  
Composite Film ◽  
Vanadium Dioxide ◽  
Hydrothermal Process ◽  
Oxidation Stability ◽  
Ethylene Vinyl Acetate ◽  
Light Transmittance ◽  
Smart Windows ◽  
Alternative Approach ◽  
Structure Morphology ◽  
Acetate Copolymer

In this study, an alternative approach is presented for developing thermo-chromic film, based on ethylene vinyl acetate copolymer (EVA) and vanadium dioxide (VO2) composite, with enhanced oxidation stability and compatibility. The neat monoclinic nanocrystalline VO2 particles were firstly prepared via a hydrothermal process, using citric acid as a reducing agent. After that, the synthesized VO2 particles were characterized, prior to mixing with maleic anhydride grafted PE. The crystalline structure, morphology and thermochromic performance of the polyethylene coated vanadium dioxide (VO2@PE) particles were then verified by SEM, TEM, DSC, XRD, FTIR techniques. After coating, a better oxidation stability of the VO2 particles was noted while the thermo-chromic performance of the VO2@PE was also maintained. After mixing with EVA, the percentage strain and tensile toughness of the VO2@PE based EVA films was the highest, followed by those of the uncoated VO2-based EVA films and the neat EVA, respectively. The VO2@PE-based films also maintained the thermochromic behavior of the monoclinic VO2. The above improvements were achieved at the expense of percentages of visible light transmittance and gel content of the EVA. This is the first report of the EVA/VO2-based thermo-chromic film, which is tougher and more stable toward oxidation than the prior state of the art. This composite film has the potential to be used as a kind of a specialty lamination material for smart windows and energy efficiency in buildings.

COMPARATIVE STUDIES OF ETHYLENE VINYL ACETATE FILMS WITH VARIOUS SILICATE NANOCOMPOSITES

2019 ◽  
Vol 12 (04) ◽  
pp. 1803-1809
Author(s):  
A. Kaviarasi ◽  
M.V.L. Kumari ◽  
A.R. Prabakaran ◽  
A. Anandavadivel
Keyword(s):  
Vinyl Acetate ◽  
Comparative Studies ◽  
Ethylene Vinyl Acetate ◽  
Silicate Nanocomposites
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