Modification of thermal conductivity of cotton fabric using Graphene

Purpose This study aims to manufacture cotton fabric with thermal regulation performance by using the composite phase change material (CPCM) prepared by coating paraffin doped with expanded graphite (EG), and the thermal effect of the fabric material was evaluated and characterized. Design/methodology/approach EG/paraffin CPCM with shape stability and enhanced thermal conductivity were prepared by the impregnation method and then finished on the surface of cotton fabric with coating technology. The microstructure, crystal structure, chemical composition, latent heat property and thermal conductivity were analyzed by scanning electron microscope, x-ray diffraction, Fourier transform infrared spectroscopy, differential scanning calorimeter and thermal constant analyzer. The photo-thermal effect of the coated fabric was studied by a thermal infrared imager. Findings CPCM prepared with a mass ratio of EG to paraffin of 1:8 showed excellent shape stability and low paraffin leakage rate. The latent heat of the CPCM was 51.6201 J/g and the thermal conductivity coefficient was increased by 11.4 times compared with the mixed paraffin. After the CPCM was coated on the surface of the cotton fabric, the light-to-heat conversion rate of the C-EG/PA3 sample was improved by 86.32% compared with the original fabric. In addition, the coated fabric showed excellent thermal stability and heat storage performance in the thermal cycling test. Research limitations/implications EG can improve the shape stability and thermal conductivity of paraffin but will reduce the latent heat energy. Practical implications The method developed provided a simple and practical solution to improving the thermal regulation performance of fabrics. Originality/value Combining paraffin wax with fabrics in a composite way is innovative and has certain applicability in improving the thermal properties of fabrics.

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Fabrication of temperature-regulating functional fabric based on n-octadecane/SWCNTs composite phase change material

Pigment & Resin Technology ◽

10.1108/prt-06-2021-0058 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Wei Zhang ◽

Jiali Weng ◽

Shang Hao ◽

Yuan Xie ◽

Yonggui Li

Keyword(s):

Thermal Conductivity ◽

Phase Change ◽

Latent Heat ◽

Cotton Fabric ◽

Screen Printing ◽

Scanning Calorimetry ◽

Shape Stability ◽

Content Type ◽

Photothermal Conversion ◽

Fabric Surface

Purpose Fabrics with photothermal conversion functions were developed based on the introduction of shape stable composite phase change materials (CPCMs). Design/methodology/approach Acidified single-walled carbon nanotubes (SWCNTs) were selected as support material to prepare CPCMs with n-octadecane to improve the thermal conductivity and shape stability. The CPCMs were finished onto the surface of cotton fabric through the coating and screen-printing method. The chemical properties of CPCMs were characterized by Fourier transform infrared spectrometer, XRD and differential scanning calorimetry (DSC). The shape stability and thermal conductivity were also evaluated. In addition, the photothermal conversion and temperature-regulating performance of the finished fabrics were analyzed. Findings When the addition amount of acidified SWCNTs are 14% to the mass of n-octadecane, the best shape stability of CPCMs is obtained. DSC analysis shows that the latent heat energy storage of CPCMs is as high as 183.1 J/g. The thermal conductivity is increased by 84.4% compared with that of n-octadecane. The temperature-regulating fabrics coated with CPCMs have good photothermal conversion properties. Research limitations/implications CPCMs with high latent heat properties are applied to the fabric surface through screen printing technology, which not only gives the fabric the photothermal conversion performance but also reflects the design of personalized patterns. Practical implications CPCMs and polydimethylsiloxane (PDMS) are mixed to make printing paste and printed cotton fabric with temperature-regulating functional is developed. Originality/value SWCNTs and n-octadecane are composited to prepare CPCMs with excellent thermal properties, which can be mixed with PDMS to make printing paste without adding other pastes. The fabric is screen-printed to obtain a personalized pattern and can be given a thermoregulatory function.

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Comfort properties of nano-filament polyester fabrics: thermo-physiological evaluation

Industria Textila ◽

10.35530/it.069.04.1529 ◽

2018 ◽

Vol 69 (04) ◽

pp. 315-321 ◽

Cited By ~ 6

Author(s):

AZEEM MUSADDAQ ◽

HES LUBOS ◽

WIENER JAKUB ◽

NOMAN MUHAMMAD TAYYAB ◽

ALI AZAM ◽

...

Keyword(s):

Thermal Conductivity ◽

Thermal Resistance ◽

Cotton Fabric ◽

Polyester Fabric ◽

Moisture Management ◽

Different Types ◽

Physiological Evaluation ◽

Thermal Comfort Properties ◽

The Aesthetic ◽

Thermal Absorptivity

Comfort along with the aesthetic properties of textile clothing in activewear and sportswear are utmost worthwhile for costumer demand as latest trends. Different types of fibers and yarns are being used to improve the moisture management and comfort of the fabric for next to skin. Nowadays, multifilaments or nano-filaments of polyester with diameters in the range of a few nanometers and lengths up to kilometers are used in different range of important technological applications such as functional fabrics, biomedicine, composite, etc. Multifilament polyester yarns are made by aggregating many continuous filaments together characterized by their high tenacity and large surface area per unit mass. The nano-filament yarn has also significant effects on thermal comfort properties as a nano-filament fabric has less thermal conductivity than cotton fabric, but equal to multichannel polyester fabric while nano-filament fabrics gave the cool feelings with higher thermal absorptivity. Moreover,coolmax fabric showed the higher value of thermal resistance as compared to nano-filament fabrics. Nano-filament fabrics exhibited higher value of watervaporpermeability than cotton fabric.

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River Branch Inspired Janus Textile with Moisture Wicking and UV Resistant Properties

10.21203/rs.3.rs-390998/v1 ◽

2021 ◽

Author(s):

Jinju Zhang ◽

Juanjuan Sun ◽

Yunjie Yin ◽

Chaoxia Wang

Keyword(s):

Thermal Conductivity ◽

Water Transport ◽

Cotton Fabric ◽

Screen Printing ◽

The Novel ◽

Nano Zno ◽

Moisture Management ◽

New Strategy ◽

Transfer Channel ◽

Gap Width

Abstract Discontinuous hydrophobic/hydrophilic Janus fabric resembling river branches is prepared by nano-ZnO pretreatment and screen printing for directional water transport and thermal conductivity properties. A river branch-like structure is constructed dexterously, and the effect is quantitatively adjusted by accurately regulating the gap width of hexagon water-transfer-channel. Fabrics based on these rivers branch-like hexagon structure possess enhanced moisture wicking performance, a desired water transport index of 147.26%, which are over seven times higher than conventional cotton fabrics. Meanwhile, nano-ZnO treatment improves the thermal conductivity of cotton fabric, which accelerates the evaporation of sweat on the surface of cotton fabric. Moreover, nano-ZnO cotton fabric shows an outstanding UV resistant property with 145 UPF value. The novel discontinuous hydrophobic/hydrophilic Janus fabric could provide a new strategy for the development of moisture management textiles.

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