Du X.,Textile Institute |
Wang H.,Textile Institute |
Wu Y.,Textile Institute |
Du Z.,Textile Institute |
Cheng X.,Textile Institute
Journal of Applied Polymer Science | Year: 2017
A hyperbranched polyol (HBP) was synthesized with poly(ethylene glycol) (PEG) as the core molecule and 2,2-bis(hydroxymethyl) propionic acid as the chain extender. Then, a series of hyperbranched polyurethane phase-change materials (HP-PCMs) with different crosslinking densities was synthesized with isophorone diisocyanate and HBP as a molecular skeleton and PEG 6000 as a phase-change ingredient. 1H-NMR, gel permeation chromatography, and Fourier transform infrared spectroscopy confirmed the successful synthesis of the HBP and HP-PCMs. The polarization optical microscopy and wide-angle X-ray diffraction results show that the HP-PCM exhibited good crystallization properties, but the crystallinity was lower than that of PEG 6000. The analysis results from differential scanning calorimetry indicated that the HP-PCMs were typical solid-solid phase-change materials with suitable phase-transition temperatures. In addition, HP-PCM-3, with an appropriate degree of hyperbranched structure, possessed the highest thermal transition enthalpy of 123.5 J/g. Moreover, thermal cycling testing and thermogravimetric analysis showed that the HP-PCMs exhibited good thermal reliability and stability. © 2017 Wiley Periodicals, Inc.
News Article | October 25, 2016
Pre-treating the fabric surface of the bandages used to treat burns with enzymes and polyethylene glycol or cellulase may promote the adhesion of antibacterial nanoparticles and improve their bacteria-repelling ability. These are the findings of a group of scientists from the Islamic Azad University, Iran, published in The Journal of The Textile Institute.
Sirvaitiene A.,Kaunas University of Technology |
Jankauskaite V.,Kaunas University of Technology |
Bekampiene P.,Textile Institute |
Norkaitis J.,Textile Institute
Polymer Composites | Year: 2013
The automated manufacturing of several complex shape composite parts simultaneously by compression and transfer molding method faces the problem of poor elastic properties of synthetic fibers, what leads to the insufficient depth of formed part and fiber breakage. Alternative to synthetic fibers, vegetable fibers have higher elasticity and lower impact on environment, but due to the lower fiber bulk integrity and orientation vegetable fibers have lower strength. However, fiber pre-tension processes involved in various composite manufacturing routes could enhance the fibrous reinforcement orientation and increase tensile strength. Nevertheless, the influence of this method commonly is used to increase the flexural strength of the composites and its influence on the tensile properties of the composite was not studied. Thus, the aim of this work was to investigate vegetable fiber pre-tensioning influence on the tensile and flexural properties of the composites. It was obtained that significant enhancement of flexural performance is caused by the residual compressive forces propagated in the matrix polymer, achieved only at high values of pre-tension (approximately at 50-70% of the ultimate strength of the reinforcement), while even minimal pre-tension load significantly increases the tensile strength of the composite. Thus, the pre-tension technique is particularly effective in the case of vegetable fibers reinforced composite, whose properties after pre-tension are comparable with the properties of glass fiber composites. © 2013 Society of Plastics Engineers.
Barauskas R.,Kaunas University of Technology |
Baltusnikaite J.,Textile Institute |
Abraitiene A.,Textile Institute |
Grineviciute D.,Textile Institute
Fibres and Textiles in Eastern Europe | Year: 2012
New textile technologies based on lamination and thermoplastic film or volumetric textile architecture creation enable to achieve many desirable effects providing necessary ballistic protection along with a considerable improvement in wearing comfort. In this study a prototype active ventilation system of a 3D textile layer was developed and investigated. The finite element, which represents the forced ventilation layer made of three-dimensional textile material, was created and may be used as a structural element within the overall structural model of the textile package. The element equations are derived on the basis of an ideal gas state equation. Results of the textile layer characteristics measured and numerical data are presented.
Varnaite-Zuravliova S.,Textile Institute |
Sankauskaite A.,Textile Institute |
Stygiene L.,Textile Institute |
Krauledas S.,Textile Institute |
And 2 more authors.
Journal of Industrial Textiles | Year: 2016
The aim of this work was to investigate the barrier and comfort properties of protective uncoated and coated-impregnated three-layered knitted fabrics with different arrangements of special yarns, such as conductive yarns and yarns with different filament cross sections. Depending on content (7.5–30%) of conductive PES yarns with carbon core filaments and PES/stainless steel spun yarns, fabrics were grouped into A and B. In order to achieve multifunctional barrier and comfort properties, high porosity polyurethane and fluorocarbon resin coatings were applied. At the beginning of the research, the fabrics of groups A and B were coated with commercially available micro-porous polyurethane foam Tubicoat® MB according to the crushed foams method and impregnated with fluorocarbon water-repellent agent Tubiguard® 270. The achieved functional, barrier (water and oil repellency, resistance to water penetration, and electrostatic shielding), and comfort (air permeability, water vapor permeability, water retentivity, and drying intensiveness) properties were determined. © 2014, The Author(s) 2014.
Park J.,Textile Institute
Colourage | Year: 2010
Textile printing is a significant late-stage process in coloration and introduces both colour and design to the substrate. The background to textile printing on modern machinery is provided and recent developments are discussed. Short runs per colourway can also be a problem as in continuous dyeing and quick-change technology has been developed.