Thermal-regulation of nonwoven fabrics by microcapsules of n-eicosane coated with a polysiloxane elastomer

Karaszewska, Agnieszka; Kamińska, Irena; Nejman, Alicja; Gajdzicki, Bogumił; Fortuniak, Witold; Chojnowski, Julian; Słomkowski, Stanisław; Sowiński, Przemysław

doi:10.1016/j.matchemphys.2019.01.029

Cited by 19 publications

(14 citation statements)

References 45 publications

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“…Microencapsulation of the PCMs in shell structures can protect the PCMs from unwanted interactions with the environment, increase the surface area of heat transfer, and localize the phase change process. [ 114 ] The microencapsulation of PCMs can be incorporated into textiles by well‐established methods in the textile industry as coating, padding, laminating, printing, etc. [ 71,72,114 ] However, it should be noticed that the PCMs may be degraded or lost by washing, wiping or abrasion.…”

Section: Advanced Strategiesmentioning

confidence: 99%

“…[ 114 ] The microencapsulation of PCMs can be incorporated into textiles by well‐established methods in the textile industry as coating, padding, laminating, printing, etc. [ 71,72,114 ] However, it should be noticed that the PCMs may be degraded or lost by washing, wiping or abrasion. To this end, fibers with hollow structures offer advantages to act as the tiny containers of PCMs.…”

Section: Advanced Strategiesmentioning

confidence: 99%

See 1 more Smart Citation

Emerging Materials and Strategies for Personal Thermal Management

Liu

Shin

et al. 2020

Advanced Energy Materials

416

242

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us warm in cold climates and shielded us from the nakedness for modesty and civilization. [1,2] Cloth is also a platform for artists, designers, and tailors to advance the clothing demands with emerging materials, process, and fashion. [2] While the majority of the functionalities of clothes lie in their physical attributes, such as their softness, breathability, air/ vapor permeability, and, of course the appearance, their role in thermal management is equally, if not more, important. The primary goal of clothing is to satisfy human being's basic needs in thermal comfort, by providing cooling in the hot environment or heating in the cold environment. [1] The energy management aspect of clothing is becoming an increasingly important and attractive aspect due to our increasing awareness to energy consumption and our persisting pursuit of comfort and health. The finite availability and the associated environmental consequence of fossil fuels have motivated us to save energy from virtually all aspects of our daily lives. A suitable thermal envelop is a necessity for our living and working. To create a comfortable indoor environment, the building heating, ventilation, and air conditioning (HVAC) systems are widely used for space cooling and heating at the expense of excessive energy consumption. [3][4][5][6] According to United States In this decade, the demands of energy saving and diverse personal thermoregulation requirements along with the emergence of wearable electronics and smart textiles give rise to the resurgence of personal thermal management (PTM) technologies. PTM, including personal cooling, heating, insulation, and thermoregulation, are far more flexible and extensive than the traditional air/liquid cooling garments for the human body. Concomitantly, many new advanced materials and strategies have emerged in this decade, promoting the thermoregulation performance and the wearing comfort of PTM simultaneously. In this review, an overview is presented of the state-ofthe-art and the prospects in this burgeoning field. The emerging materials and strategies of PTM are introduced, and classed by their thermal functions. The concept of infrared-transparent visible-opaque fabric (ITVOF) is first highlighted, as it triggers the work on advanced PTM by combining it with radiative cooling, and the corresponding implementations and realizations are subsequently introduced, followed by wearable heaters, flexible thermoelectric devices, and sweat-management Janus textiles. Finally, critical considerations on the challenges and opportunities of PTM are presented and future directions are identified, including thermally conductive polymers and fibers, physiological/psychological statistical analysis, and smart PTM strategies.

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Section: Advanced Strategiesmentioning

confidence: 99%

Section: Advanced Strategiesmentioning

confidence: 99%

Emerging Materials and Strategies for Personal Thermal Management

Liu

Shin

et al. 2020

Advanced Energy Materials

416

242

View full text Add to dashboard Cite

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“…The polysiloxanes are mechanically strong and elastic enough to withstand the volume change during a phase change. Nonwoven textile material that is modified with selected polysiloxane PCM capsules was subjected to thermoregulation studies [48]. The modified textile had good and stable thermoregulating properties and showed a high-energy storage coefficient.…”

Section: Fabrication Of Core-shell Polysiloxane Microcapsules Containmentioning

confidence: 99%

Hydrophilic Polysiloxane Microspheres and Ceramic SiOC Microspheres Derived from Them

Chojnowski

Słomkowski

Fortuniak

et al. 2019

J Inorg Organomet Polym

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In this overview article, the research on polysiloxane microspheres performed in the authors' laboratory is briefly reviewed. These microspheres are prepared in water emulsion from polyhydromethylsiloxane (PHMS). This polymer is cross-linked in the emulsion process by hydrosilylation using various low molecular weight cross-linkers having at least two vinyl functions. The microspheres contain a large number of silanol groups which give them hydrophilicity and a broad possibility of functionalization by condensation with reactive silanes bearing a functional group in the organic radical. Further transformation of these functions leads to materials for practical use, such as catalysts and biocidal powders. The hydrophilic-hydrophobic properties of the microspheres may be fine-tuned by silylation or modification of the precursor PHMS polymer. Pristine microspheres are highly hydrophilic and well-dispersed in water. They do not adsorb proteins and hydrophobic organic substances. Macropores may be generated in these particles by a simple modification of the emulsion procedure. These microspheres are also very good precursors for ceramic silicon oxycarbide microsphers because they retain their shape in pyrolytic processes even at high temperatures; and they give a high yield of ceramic material. The polysiloxane microspheres heated at 600 °C give micro and mezo porous materials with specific surface above 500 m 2 /g. When pyrolysed at temperatures 1000-1400 °C, they form solid ceramic microspheres of high strength. They retain spherical shape at 1500 °C although cracks are formed at their surfaces. Etching them with HF(aq) solution gives porous microspheres with specific surface above 1000 m 2 /g that is almost devoid of SiO 2 .

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“…It is important for nonwoven padding to provide recoverable stretch in both machine direction and cross direction. It is very common practice to incorporate elastic components into nonwoven fabrics to increase elasticity, but such fabrics are likely to have an uneven surface, heavy basic weight, and stiffer 11 . Most of the nonwoven fabrics can be elongated in the cross direction, but the elongation has limited recovery and also recovery decreases after each successive elongation 12 .…”

Section: Introductionmentioning

confidence: 99%

Development of biaxial stretchable nonwoven paddings using novel polymeric fibers

Arumugam

Yang

et al. 2021

Polymers for Advanced Techs

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Nonwoven paddings with superior stretch and recovery properties in both directions with good thermal insulation properties were developed for application in winter clothes. Paddings were developed using a self‐crimping elastic fiber composed of both polyethylene terephthalate (PET) and polytrimethylene terephthalate (PTT) polymers, polyester fiber balls, polypropylene fiber balls, along with bicomponent as binder fibers at different blending ratios through carding, postthermal bonding, and gluing process. Developed paddings were characterized and analyzed for their biaxial stretch and recovery behavior, elongation under tensile load, stiffness, thermal insulation, and washing stability. In addition, energy loss was calculated and reported from hysteresis curve obtained during 40% loading (stretch) and unloading (recovery) cycle. The results were statistically evaluated to determine whether fiber types and blend ratios have significant effect on nonwoven paddings properties. This study indicates that nonwoven padding composed of naturally crimped elastic fibers: binder fibers (50:50) has ability to stretch around 120‐140% in both directions, 95% total recovery with minimal energy loss upon 40% stretch and recovery cycle, and it has sustainable tensile breaking load around 11 N along cross direction and 20 N along machine direction. It has stiffness load 5 N which is flexible enough for required applications, possesses good thermal insulation properties, and holds their structural properties after five washing cycles. From statistical analysis, ANOVA results exhibited that the used fiber types and their weight percentages significantly affect stretch and recovery, other properties of nonwoven paddings for required application.

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Thermal-regulation of nonwoven fabrics by microcapsules of n-eicosane coated with a polysiloxane elastomer

Cited by 19 publications

References 45 publications

Emerging Materials and Strategies for Personal Thermal Management

Emerging Materials and Strategies for Personal Thermal Management

Hydrophilic Polysiloxane Microspheres and Ceramic SiOC Microspheres Derived from Them

Development of biaxial stretchable nonwoven paddings using novel polymeric fibers

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