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 »
- Authors:
-
- Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Materials Science and Engineering
- 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
- 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 Laboratory (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. https://doi.org/10.1002/adma.201803847
Kim, Hye-Na, Ge, Dengteng, Lee, Elaine, and Yang, Shu. Sun .
"Multistate and On-Demand Smart Windows". United States. https://doi.org/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 = {Sun Sep 02 00:00:00 EDT 2018},
month = {Sun Sep 02 00:00:00 EDT 2018}
}
Web of Science
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