Thermo-regulating properties of textiles with incorporated microencapsulated Phase Change Materials
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MRS Advances © 2020 Materials Research Society DOI: 10.1557/adv.2020.106
Thermo-regulating properties of textiles with incorporated microencapsulated Phase Change Materials Maria Cristina Larciprete1, Stefano Paoloni2, Gianmario Cesarini1,5, Concita Sibilia1, Vitalija Rubežienė3, Audrone Sankauskaitė4 1 Dipartimento di Scienze di Base ed Applicate per l̓Ingegneria, Sapienza Università di Roma, Via Antonio Scarpa 16, 00161 Rome, Italy 2 Dipartimento di Ingegneria Industriale, Università degli Studi di Roma Tor Vergata, Via del Politecnico 1, 00133 Rome, Italy 3 Department of Textiles Physical-Chemical Testing, Center for Physical Sciences and Technology, Demokratų str. 53, Kaunas, Lithuania 4 Department of Textile Technologies, Center for Physical Sciences and Technology, Demokratų str. 53, Kaunas, Lithuania 5
I.N.F.N. Sezione di Roma, Piazzale Aldo Moro 2, 00185 Rome, Italy
ABSTRACT Phase change materials (PCMs) are getting increasing interest due to their capacity to absorb, store and release heat energy. Their effectiveness is characterized by quantities of absorbed/released heat energy, expressed as enthalpy. Specifically, the larger is the enthalpy, the more efficient thermoregulation effect is achieved. With this in mind, PCMs can be used in the manufacture of thermally regulated clothing in order to minimize heat strain and simultaneously improve thermal comfort. Moreover, such materials also modify their infrared radiation emission during phase transition, thus they can be envisioned to exploit thermal shielding applications. The aim of the present research was to investigate the infrared emissivity of textiles composed by cotton yarns with dispersed PCMs. The organic microcapsules of phase change materials, having different binding to the fibre mechanisms, were padded onto the fabric surface by pad-dry-cure method. The thermal properties and stabilities were measured using differential scanning calorimetry, while infrared emissivity was characterized using infrared thermographic technique. The obtained experimental results
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show a dynamic tuning of IR emissivity during heating/cooling process which can be correlated to the type and properties (enthalpy of fusion) of the corresponding PCM.
INTRODUCTION Thermal regulating textiles play a very important role in providing thermal comfort for human beings in temperature changing environments. The level of thermal comfort depends on the heat exchange between the human body and the surrounding environment. The thermoregulatory effect can be achieved by dispersing microcapsulated phase change materials (PCMs) into the textiles. As these materials have ability to lower the temperature of the body or an object [1, 2], besides wearing comfort they can improve thermal concealment properties and infrared camouflage effectiveness. Their s
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