Impact of SiO2 Particles in Polyethylene Textile Membrane for Indoor Personal Heating

Boutghatin, Mohamed; Assaf, Salim; Pennec, Yan; Carette, Michèle; Thomy, V.; Akjouj, Abdellatif; Djafari‐Rouhani, Bahram

doi:10.3390/nano10101968

Cited by 11 publications

(15 citation statements)

References 24 publications

(29 reference statements)

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“…Furthermore, there is no strict requirement on the size of the SiO 2 particles in this material design. With a suitable particle filling concentration and film thickness, random sized particles are sufficient to enable high mid-infrared emissivity, ,− which have a lower cost to fabricate, unlike the previous study where a specified size of the SiO 2 particles is needed …”

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confidence: 96%

Three-Dimensional Printable Nanoporous Polymer Matrix Composites for Daytime Radiative Cooling

et al. 2021

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Daytime radiative cooling presents an exciting new strategy for combating global warming, because it can passively cool buildings by reflecting sunlight and utilizing the infrared atmospheric window to eject heat into outer space. Recent progress with novel material designs showed promising subambient cooling performance under direct sunlight. However, large-scale implementation of radiative cooling technologies is still limited by the high-cost and complex fabrication. Here, we develop a nanoporous polymer matrix composite (PMC) to enable rapid production and cost reduction using commercially available polymer processing techniques, such as molding, extrusion, and 3D printing. With a high solar reflectance of 96.2% and infrared emissivity > 90%, the nanoporous PMC achieved a subambient temperature drop of 6.1 °C and cooling power of 85 W/m 2 under direct sunlight, which are comparable to the state-of-the-art. This work offers great promise to make radiative cooling technologies more viable for saving energy and reducing emissions in building cooling applications.

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confidence: 96%

Three-Dimensional Printable Nanoporous Polymer Matrix Composites for Daytime Radiative Cooling

et al. 2021

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“…In some cases, to avoid time consuming calculations, we used the generalized transfer-matrix method to calculate R and T. [29] In this paper, all simulations have been performed for an electromagnetic plane wave at normal incidence. The effect of the incident angle has been considered in a previous work [19] resulting in a small variation of the mean optical response for angles less than 40°. As the incidence is normal and the surface of the structure is flat, the wave polarization is not an issue.…”

Section: Model and Methodsmentioning

confidence: 99%

“…Of course, PE is also well known in the industrial field for many applications [ 23 ] and in particular a form derived from PE, the nanoporous PE (nanoPE) which has been used for textile applications in recent years. [ 8,15,20,24 ] The optical properties of the nanoPE are similar to the PE in the infrared range [ 8,19 ] offering in addition more breathability and flexibility due to the presence of the nanopores. Therefore, all results and demonstration presented in this work are valid in the case of nanoPE membranes.…”

Section: Model and Methodsmentioning

confidence: 99%

“…[ 18 ] For heating purpose in indoor conditions, we have theoretically demonstrated that a few percent of SiO 2 nanoparticles decreases the infrared transmission in benefit of the absorption (emissivity), reducing the ambient temperature to maintain the thermal comfort by more than 1 °C. [ 19 ] We explained such benefit by the increase of the thermal radiation flux from the textile's inner face to the human body. Furthermore, Cai et al.…”

Section: Introductionmentioning

confidence: 99%

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Asymmetric Design for a High‐Performance Indoor Radiative Heating Fabric

Boutghatin

Pennec

Djafari‐Rouhani

et al. 2022

Adv Materials Technologies

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Keeping the human body in a thermal comfort is a necessity for our own biological balance. Actually, to create a suitable thermal envelop in indoor areas, there are two strategies: using air conditioning systems (HVAC) to cool or warm the indoor space and/or clothing to adjust the temperature around the human body. The first strategy is showing his limitation due to the considerable energy consumption. In European Union, the building sector uses more than 40% of total energy consumption. [1] More than 50% of this energy is dedicated only for space heating. [2] This huge energy consumption is a worrying contribution to global warming. [3] In that assessment, clothes play a key role in our life to satisfy the human body thermal comfort by providing cooling in hot environment or heating in cold one. However, traditional clothes have a very limited thermal insulation performance. Indeed, a sudden variation of the ambient temperature can impact subsequently the thermal comfort of the body. The development of new textiles able to manage the temperature of the human body over a wide range of indoor temperatures, without providing additional external energy, appears to be an urgent necessity.Recently, personal thermal management has been demonstrated to be an efficient solution to replace the traditional ways of heating or cooling. [4,5] At normal skin temperature of 34 °C, the human skin emits thermal infrared (IR) radiations with a maximum peak around the wavelength 9.6 µm. In sedentary state, the infrared radiation accounts more than 50% of the total body heat losses. [6] By controlling the emissivity, transmissivity, and reflectivity of human body IR radiation through textiles, the temperature in the space between the skin and the textile (microclimate) can be controlled.Although many efforts have been made in the scientific community to develop radiative thermal management textiles, it remains, to this day, a major challenge. Tong et al. proposed an infrared-transparent visible-opaque fabric (ITVOF) which ensures the dissipation of thermal radiation emitted by the human body directly to the environment. [7] Hsu et al. have experimentally demonstrated that a nanoporous polyethylene (nanoPE) film presents both high infrared transparency and visible opacity. [8] The nanoPE film is opaque to human eyes Improving radiative heating performance of textiles is becoming one of the most current research topics to reduce the energy consumption used to control the indoor areas temperature. In this work, the properties of a textile-based asymmetric design for radiative heating are studied both theoretically and experimentally, and its remarkable efficiency over a wide range of temperature is demonstrated. By sandwiching a thin metallic layer characterized by a high reflectivity in the mid-infrared (MIR) between two polyethylene (PE) membranes of same thickness, it is proposed to control the MIR emissivity of the structure by the introduction of SiO 2 nanoparticles (NPs) in one of the two PE membranes. By reversing the fabric sid...

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“…65 A sandwich membrane consisted of MnO 2 and Cu nanowires on the skin side and cellulose @ LDH membrane on the outside can reflect the IR radiation of the body. 71 Boutghatin et al 72 showed that by inserting 5% SiO 2 submicron particles in PE membrane, the membrane's radiative heating increases, which reduces the 1.1 C set point. A polymer photonic membrane with air holes can modulate the optical spectrum in the MIR range and thermoregulate the human body microclimate.…”

Section: Radiative Heating Membranesmentioning

confidence: 99%

A review on emerging developments in thermal and moisture management by membrane‐based clothing systems towards personal comfort

Gorji

Mazinani

Gharehaghaji

2022

J of Applied Polymer Sci

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Enhanced heat and moisture management has become highly urgent to clothing systems due to the global need to personalize the ventilation process. As a significant sector of apparel industries, membrane‐based clothing systems offer protection and ventilation functionalities. This review aims at providing a new viewpoint on efforts to improve heat and moisture management in membrane‐based clothing systems according to the latest advances in this field. The study terminates with presenting a perspective on current challenges and opportunities for future research directions in personal thermal and moisture management technologies. In fact, membranes with different functionalities used in clothing systems such as photonic membranes with heating and cooling performances, unidirectional liquid transport membranes, waterproof‐breathable membranes, shape‐memory membranes, thermoregulating membranes, thermal conductive membranes and finally protective membranes are investigated. The essential functions associated to different categories of the investigated membranes along with the relationships between membrane structure and properties are presented.

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Impact of SiO2 Particles in Polyethylene Textile Membrane for Indoor Personal Heating

Cited by 11 publications

References 24 publications

Three-Dimensional Printable Nanoporous Polymer Matrix Composites for Daytime Radiative Cooling

Three-Dimensional Printable Nanoporous Polymer Matrix Composites for Daytime Radiative Cooling

Asymmetric Design for a High‐Performance Indoor Radiative Heating Fabric

A review on emerging developments in thermal and moisture management by membrane‐based clothing systems towards personal comfort

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