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Title: Multistate and On-Demand Smart Windows

Abstract

Composite films consisting of wrinkles on top of the elastomeric poly(dimethylsiloxane) film and a thin layer of silica particles embedded at the bottom is prepared as on-demand mechanoresponsive smart windows. By carefully varying the wrinkle geometry, silica particle size, and stretching strain, different initial optical states and a large degree of optical transmittance change in the visible to near infrared range with a relatively small strain (as small as 10%) is achieved. The 10% pre-strain sample has shallow wrinkles with a low amplitude and shows moderate transmittance (60.5%) initially and the highest transmittance of 86.4% at 550 nm when stretched at the pre-strain level. Stretching beyond the pre-strain level leads to a drastic decrease of the transmittance at 550 nm, 39.7% and 70.8% with an additional 10% and 30% strain, respectively. The large drop of optical transmittance is the result of combined effects from the formation of secondary wrinkles and nanovoids generated around the particles. The 20% pre-strain sample has wrinkles with a moderate amplitude, showing 36.9% transmittance in the initial state, and the highest transmittance of 71.5% at 550 nm when stretched to the pre-strain level. Lastly, further stretching leads to increased opacity similar to that seen from themore » 10% pre-strain sample.« less

Authors:
 [1];  [2];  [3]; ORCiD logo [1]
  1. Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Materials Science and Engineering
  2. Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Materials Science and Engineering; Donghua Univ., Shanghai (China). State Key Lab. for Modification of Chemical Fibers and Polymer Materials, Inst. of Functional Materials
  3. Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Materials Science and Engineering; Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1497269
Alternate Identifier(s):
OSTI ID: 1468361
Report Number(s):
LLNL-JRNL-748798
Journal ID: ISSN 0935-9648; 933677
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Advanced Materials
Additional Journal Information:
Journal Volume: 30; Journal Issue: 43; Journal ID: ISSN 0935-9648
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; composite films; on‐demand; silica particles; smart windows; wrinkles

Citation Formats

Kim, Hye-Na, Ge, Dengteng, Lee, Elaine, and Yang, Shu. Multistate and On-Demand Smart Windows. United States: N. p., 2018. Web. doi:10.1002/adma.201803847.
Kim, Hye-Na, Ge, Dengteng, Lee, Elaine, & Yang, Shu. Multistate and On-Demand Smart Windows. United States. doi:10.1002/adma.201803847.
Kim, Hye-Na, Ge, Dengteng, Lee, Elaine, and Yang, Shu. Sun . "Multistate and On-Demand Smart Windows". United States. doi:10.1002/adma.201803847. https://www.osti.gov/servlets/purl/1497269.
@article{osti_1497269,
title = {Multistate and On-Demand Smart Windows},
author = {Kim, Hye-Na and Ge, Dengteng and Lee, Elaine and Yang, Shu},
abstractNote = {Composite films consisting of wrinkles on top of the elastomeric poly(dimethylsiloxane) film and a thin layer of silica particles embedded at the bottom is prepared as on-demand mechanoresponsive smart windows. By carefully varying the wrinkle geometry, silica particle size, and stretching strain, different initial optical states and a large degree of optical transmittance change in the visible to near infrared range with a relatively small strain (as small as 10%) is achieved. The 10% pre-strain sample has shallow wrinkles with a low amplitude and shows moderate transmittance (60.5%) initially and the highest transmittance of 86.4% at 550 nm when stretched at the pre-strain level. Stretching beyond the pre-strain level leads to a drastic decrease of the transmittance at 550 nm, 39.7% and 70.8% with an additional 10% and 30% strain, respectively. The large drop of optical transmittance is the result of combined effects from the formation of secondary wrinkles and nanovoids generated around the particles. The 20% pre-strain sample has wrinkles with a moderate amplitude, showing 36.9% transmittance in the initial state, and the highest transmittance of 71.5% at 550 nm when stretched to the pre-strain level. Lastly, further stretching leads to increased opacity similar to that seen from the 10% pre-strain sample.},
doi = {10.1002/adma.201803847},
journal = {Advanced Materials},
number = 43,
volume = 30,
place = {United States},
year = {2018},
month = {9}
}

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Cited by: 4 works
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