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Article: Broadband Light Management with Thermochromic Hydrogel Microparticles for Smart Windows

TitleBroadband Light Management with Thermochromic Hydrogel Microparticles for Smart Windows
Authors
Keywordsoptical phase change materials
microgels
solar radiation
smart window
Issue Date2019
PublisherCell Press. The Journal's web site is located at https://www.journals.elsevier.com/joule
Citation
Joule, 2019, v. 3 n. 1, p. 290-302 How to Cite?
AbstractControl of solar transmission through windows promises to reduce building energy consumption. However, the ability of current chromogenic technologies to regulate solar gain with the tunable extinction of phase-change materials is still far from optimum. We report a strategy for optimizing the transmittance modulation range of temperature-responsive hydrogel particles by means of tuning the light-scattering behaviors through controlling particle size and internal structure. An emerging thermochromic material, poly(N-isopropylacrylamide)-2-aminoethylmethacrylate hydrochloride (pNIPAm-AEMA) microparticles, was synthesized to demonstrate this strategy. The average size of pNIPAm-AEMA microparticles varies from 1,388 nm at 25°C to 546 nm at 35°C, contributing to an unprecedented infrared transmittance modulation of 75.6%. A high luminous transmittance of 87.2% at 25°C had also been accomplished. An investigation of the tunable scattering behaviors of pNIPAm-AEMA particles provided mechanistic insight into light management by this class of materials, the application field of which is beyond energy-saving smart windows.
Persistent Identifierhttp://hdl.handle.net/10722/279449
ISSN
2019 Impact Factor: 27.054

 

DC FieldValueLanguage
dc.contributor.authorLi, XH-
dc.contributor.authorLiu, C-
dc.contributor.authorFeng, SP-
dc.contributor.authorFang, NX-
dc.date.accessioned2019-11-01T07:17:34Z-
dc.date.available2019-11-01T07:17:34Z-
dc.date.issued2019-
dc.identifier.citationJoule, 2019, v. 3 n. 1, p. 290-302-
dc.identifier.issn2542-4351-
dc.identifier.urihttp://hdl.handle.net/10722/279449-
dc.description.abstractControl of solar transmission through windows promises to reduce building energy consumption. However, the ability of current chromogenic technologies to regulate solar gain with the tunable extinction of phase-change materials is still far from optimum. We report a strategy for optimizing the transmittance modulation range of temperature-responsive hydrogel particles by means of tuning the light-scattering behaviors through controlling particle size and internal structure. An emerging thermochromic material, poly(N-isopropylacrylamide)-2-aminoethylmethacrylate hydrochloride (pNIPAm-AEMA) microparticles, was synthesized to demonstrate this strategy. The average size of pNIPAm-AEMA microparticles varies from 1,388 nm at 25°C to 546 nm at 35°C, contributing to an unprecedented infrared transmittance modulation of 75.6%. A high luminous transmittance of 87.2% at 25°C had also been accomplished. An investigation of the tunable scattering behaviors of pNIPAm-AEMA particles provided mechanistic insight into light management by this class of materials, the application field of which is beyond energy-saving smart windows.-
dc.languageeng-
dc.publisherCell Press. The Journal's web site is located at https://www.journals.elsevier.com/joule-
dc.relation.ispartofJoule-
dc.subjectoptical phase change materials-
dc.subjectmicrogels-
dc.subjectsolar radiation-
dc.subjectsmart window-
dc.titleBroadband Light Management with Thermochromic Hydrogel Microparticles for Smart Windows-
dc.typeArticle-
dc.identifier.emailLiu, C: willmole@hku.hk-
dc.identifier.emailFeng, SP: hpfeng@hku.hk-
dc.identifier.authorityFeng, SP=rp01533-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.joule.2018.10.019-
dc.identifier.scopuseid_2-s2.0-85060015558-
dc.identifier.hkuros308567-
dc.identifier.volume3-
dc.identifier.issue1-
dc.identifier.spage290-
dc.identifier.epage302-
dc.publisher.placeUnited States-

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