Environmentally responsive hydrogel ...
Document type :
Article dans une revue scientifique: Article original
DOI :
PMID :
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Title :
Environmentally responsive hydrogel composites for dynamic body thermoregulation.
Author(s) :
Altamirano, M. G. [Auteur]
Abebe, M. G. [Auteur]
Hergué, N. [Auteur]
Lejeune, Joseph [Auteur]
École nationale supérieure des arts et industries textiles [ENSAIT]
Cayla, Aurélie [Auteur]
Campagne, C. [Auteur]
Maes, B. [Auteur]
Devaux, E. [Auteur]
Odent, Jérémy [Auteur]
Raquez, Jean-Marie [Auteur]
Abebe, M. G. [Auteur]
Hergué, N. [Auteur]
Lejeune, Joseph [Auteur]

École nationale supérieure des arts et industries textiles [ENSAIT]
Cayla, Aurélie [Auteur]
Campagne, C. [Auteur]
Maes, B. [Auteur]
Devaux, E. [Auteur]
Odent, Jérémy [Auteur]
Raquez, Jean-Marie [Auteur]
Journal title :
Soft Matter
Abbreviated title :
Soft Matter
Publication date :
2023-03-08
ISSN :
1744-6848
HAL domain(s) :
Sciences de l'ingénieur [physics]
English abstract : [en]
ydrogel composites exhibiting dynamic thermo-hydro responsive modulation of infrared radiation (IR) in the 5–15 μm range are designed for personalized body thermoregulation. Fabrication of the proposed system relies on the ...
Show more >ydrogel composites exhibiting dynamic thermo-hydro responsive modulation of infrared radiation (IR) in the 5–15 μm range are designed for personalized body thermoregulation. Fabrication of the proposed system relies on the periodic arrangement of submicron-sized spherical fine silica (SiO2) particles within poly(N-isopropylacrylamide) (PNIPAM)-based hydrogels. The dependence of the SiO2 particles content on the IR reflection, followed by its modulation in response to any immediate environmental changes are thereby investigated. The addition of 20 wt% of SiO2 allowed the hydrogel composites to reflect 20% of the IR emitted by the human body at constant temperature (i.e. T = 20 °C) and relative humidity (i.e. RH = 0%). According to Bragg's law, we found that the smaller the distance between the SiO2 particles, the higher the IR reflection. The IR reflection further increased to a maximum of 42% when the resulting hydrogel composites are subjected to changes in relative humidity (i.e. RH = 60%) and temperature (i.e. T = 35 °C). Thermography is used to map the IR radiation emitted from the hydrogel composites when placed on the skin of the human body, demonstrating that the composite is actually reflecting IR. The latter results are supported by theoretical models that define the IR reflection profile of the resulting hydrogel composites with respect to the silica content, relative humidity and temperature.Show less >
Show more >ydrogel composites exhibiting dynamic thermo-hydro responsive modulation of infrared radiation (IR) in the 5–15 μm range are designed for personalized body thermoregulation. Fabrication of the proposed system relies on the periodic arrangement of submicron-sized spherical fine silica (SiO2) particles within poly(N-isopropylacrylamide) (PNIPAM)-based hydrogels. The dependence of the SiO2 particles content on the IR reflection, followed by its modulation in response to any immediate environmental changes are thereby investigated. The addition of 20 wt% of SiO2 allowed the hydrogel composites to reflect 20% of the IR emitted by the human body at constant temperature (i.e. T = 20 °C) and relative humidity (i.e. RH = 0%). According to Bragg's law, we found that the smaller the distance between the SiO2 particles, the higher the IR reflection. The IR reflection further increased to a maximum of 42% when the resulting hydrogel composites are subjected to changes in relative humidity (i.e. RH = 60%) and temperature (i.e. T = 35 °C). Thermography is used to map the IR radiation emitted from the hydrogel composites when placed on the skin of the human body, demonstrating that the composite is actually reflecting IR. The latter results are supported by theoretical models that define the IR reflection profile of the resulting hydrogel composites with respect to the silica content, relative humidity and temperature.Show less >
Language :
Anglais
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
Université de Lille
ENSAIT
Junia HEI
ENSAIT
Junia HEI
Collections :
Submission date :
2023-06-20T01:35:16Z
2024-01-17T13:19:46Z
2024-01-17T13:19:46Z