A phase change material embedded composite consisting of kapok and hollow PET fibers for dynamic thermal comfort regulation
[Display omitted] •Kapok fiber with thin cell wall and large lumen was used as supporting material for PCM.•The composite made by kapok and hollow PET fibers encapsulated PCM by vacuum impregnation.•This composite demonstrated obvious thermal regulating capacity in the cooling/hot environment.•The c...
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Veröffentlicht in: | Industrial crops and products 2020-12, Vol.158, p.112945, Article 112945 |
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Sprache: | eng |
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•Kapok fiber with thin cell wall and large lumen was used as supporting material for PCM.•The composite made by kapok and hollow PET fibers encapsulated PCM by vacuum impregnation.•This composite demonstrated obvious thermal regulating capacity in the cooling/hot environment.•The composite demonstrated robust leakage resistance to laundry, pressure and heat/cooling cycling.•This composite has great potential for dynamic heat insulation and thermal regulation.
Kapok fiber, an agricultural product, is a typical cellulosic fiber with the features of thin cell wall and large lumen. Herein, a microtubule-based composite with high porosity of 98.03 % was prepared using kapok fibers and hollow PET. The kapok fiber-based composite successfully encapsulated a phase change material (PCM), that is a fatty acid ester of myristic acid and tetradecyl alcohol (MA-TD), in the microtubules by vacuum impregnation. The SEM showed that the PCM was encapsulated in the lumens of the fibers with a calculated percentage of 40.5 %. This condition provided the composite a basic thermal insulation from air pockets in the composite and a dynamic thermal insulation from the PCM. The kapok/PET/MA-TD could absorb 76.8 J/g latent heat in the comfort temperature range of 24 °C – 42.3 °C or release 77.4 J/g latent heat in the comfort temperature range of 29.7 °C – 10.5 °C. It withstood repeated laundry and exhibited robust leakage resistance to continuous heating/cooling under pressure. In addition, the composite was successfully used to dynamically regulate the temperature with obvious thermal regulating capacity in the simulated cooling/hot environments. Such material will be a robust candidate for dynamic heat regulating and thermal insulating applications. |
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ISSN: | 0926-6690 1872-633X |
DOI: | 10.1016/j.indcrop.2020.112945 |