scholarly journals Comparative Enactment of Fluorocarbon-free and Fluorocarbon-based Water Repellent Finishes on Cotton Single Jersey Fabrics

2018 ◽  
Vol 8 (02) ◽  
Author(s):  
Kawser Parveen Chowdhury ◽  
Sutapa Chowdhury ◽  
Mohammad Alamin Hosain ◽  
Ahasan Al Mamun ◽  
Sk. Nasimul Alahi ◽  
...  
Keyword(s):  
Water Repellency ◽  
Strength Test ◽  
Test Method ◽  
Water Repellent ◽  
Color Fastness ◽  
Bursting Strength ◽  
Knit Fabrics ◽  
Different Types ◽  
Derivatives Of ◽  
Single Jersey

In this study, single jersey derivatives of knit fabric were taken to evaluate the performance of water repellent finishes on knit fabrics properties. Here, polo pique and single jersey knit structured fabrics were treated with different types of water repellent chemicals at different formulations. The levels of water repellency of the fabrics were measured in accordance with ISO 4920:2012spray rating test method. To assess the performance of water repellent finishes on knit fabric properties, GSM, bursting strength test according to ASTM (D 3786-87) method, color fastness to wash according to ISO- 105/ C06-C2S method, color fastness to water with ISO 105-E01 method and color fastness to rubbing with ISO-105-X 12 method were done. The results showed that the water repellent finish type and concentration were very important parameters to obtain water repellent fabrics with desirable properties.

Chemical-Free Scouring and Bleaching of Cotton Knit Fabric for Optimum Dyeing Performance

2019 ◽  
Vol 37 (4) ◽  
pp. 265-280 ◽  
Author(s):  
Md. Abdul Hannan ◽  
Papia Haque ◽  
S. M. Fijul Kabir ◽  
Mohammed Mizanur Rahman
Keyword(s):  
Color Difference ◽  
Color Measurement ◽  
Color Fastness ◽  
Green Method ◽  
Process Stage ◽  
Dyeing Performance ◽  
Acceptable Range ◽  
Knit Fabrics ◽  
Single Jersey ◽  
Infrared Data

The current work endeavored to avoid chemicals during scouring and bleaching of cotton knit fabric in order to introduce a green method. Single jersey single lacoste knit fabrics were treated in water at 105 °C, 120 °C, and 130 °C for 20, 40, and 60 min at reduced process stage. Fourier transform infrared data revealed the weakening and shifting of typical bands of wax and pectin-based cotton impurities in the region of 1,740–1,200 cm−1 for the pretreated samples at 130 °C for 20 min. Color difference (Color Measurement Committee ΔE) was found within the acceptable range for 1.5% and 1% dyed samples when treated at 105 °C for 20 min, while 0.5% dyed samples required 130 °C for 20 min to achieve the desired range. The ratings for color fastness to washing, perspiration, and rubbing were 4–5 for all the chemical-free pretreated samples. The proposed process yielded better strength and dimensional stability compared to the conventionally pretreated samples.

Quantifying Water Repellency by Modifying Spray Test Method AATCC TM22 to Extend Test Duration Allowing Discrimination between Similarly Graded Fabrics

2020 ◽  
Vol 7 (6) ◽  
pp. 8-14
Author(s):  
Philippa J. Hill ◽  
David Kirton ◽  
Mark Taylor ◽  
Richard S. Blackburn
Keyword(s):  
Mass Difference ◽  
Water Repellency ◽  
Test Period ◽  
Test Method ◽  
Water Repellent ◽  
Test Duration ◽  
Surface Wetting ◽  
Assessment Of Performance ◽  
Textile Testing ◽  
End Use

The AATCC TM22-2014 spray test (similarly BS EN ISO 4920:2012) is widely used to determine the water repellency of textiles. Given the ongoing move towards non-fluorinated chemistries to provide water repellent finishes on textiles, modifications to the spray test are suggested to discriminate between those which initially demonstrate similar repellency and aid in assessment of performance within laboratory textile testing. An extended shower duration of 60 minutes or 120 minutes is recommended, with additional calculations to objectively quantify surface wetting. This increased test period demonstrated differences in performance between repellent finishes with a 1.37 g mass difference between fluorinated and non-fluorinated chemistries after 120 minutes. Further quantification of repellent performance, as set out in this study, would determine the performance of non-fluorinated durable water repellent (DWR) chemistries and suitability for end use.

Structural Impact on Some Common Physical Properties of Single Jersey Weft Knit Fabric

2021 ◽  
Vol 8 (4) ◽  
pp. 36-46
Author(s):  
Md. Arif Mahmud ◽  
Md. Ruhul Amin ◽  
Ferdausee Rahman Anannya
Keyword(s):  
Transmission Rate ◽  
Areal Density ◽  
Water Vapor Transmission Rate ◽  
Fabric Structure ◽  
Knit Fabrics ◽  
Structural Impact ◽  
Water Vapor Transmission ◽  
Different Types ◽  
Drying Properties ◽  
Single Jersey

Single jersey weft knit fabrics include a large portion of knitted products. These fabrics are made using different types of stitches. In this study, several single jersey weft knit fabric samples containing four courses and two wales in the repeating unit of the fabric structure were made by introducing and gradually increasing the number of tuck stitches in the structure, to find out the effect of this stitch on fabric properties. Results showed that tuck stitches could positively affect the areal density, width, and tensile properties of the fabric. For some comfort-related properties, tuck stitches were found to improve wicking and drying properties, reduce water vapor transmission rate, and affect fabric smoothness. The position of tuck stitches in the structure also had some effect, but was not as significant as when the number of tuck stitches was varied.

Quasi-Barrierless Submolecular Motion in Mechanically Interlocked Carbon Nanotubes

2020 ◽  
Author(s):  
Julia Villalva ◽  
Belén Nieto-Ortega ◽  
Manuel Melle-Franco ◽  
Emilio Pérez
Keyword(s):  
Density Functional ◽  
Close Contact ◽  
Tight Binding ◽  
Energetic Cost ◽  
Molecular Fragments ◽  
Activation Barriers ◽  
Flat Surfaces ◽  
Different Types ◽  
Atomically Flat ◽  
Derivatives Of

The motion of molecular fragments in close contact with atomically flat surfaces is still not fully understood. Does a more favourable interaction imply a larger barrier towards motion even if there are no obvious minima? Here, we use mechanically interlocked rotaxane-type derivatives of SWNTs (MINTs) featuring four different types of macrocycles with significantly different affinities for the SWNT thread as models to study this problem. Using molecular dynamics, we find that there is no direct correlation between the interaction energy of the macrocycle with the SWNT and its ability to move along or around it. Density functional tight-binding calculations reveal small (<2.5 Kcal·mol-1) activation barriers, the height of which correlates with the commensurability of the aromatic moieties in the macrocycle with the SWNT. Our results show that macrocycles in MINTs rotate and translate freely around and along SWNTs at room temperature, with an energetic cost lower than the rotation around the C−C bond in ethane.<br>

Non-adhesive lotus and other hydrophobic materials

2008 ◽  
Vol 366 (1870) ◽  
pp. 1539-1556 ◽  
Author(s):  
David Quéré ◽  
Mathilde Reyssat
Keyword(s):  
Solid Surface ◽  
Room Temperature ◽  
Water Repellency ◽  
Short Review ◽  
Water Repellent ◽  
Practical Applications ◽  
Hydrophobic Materials ◽  
Volatile Liquid ◽  
Air Cushion ◽  
The Stability

Superhydrophobic materials recently attracted a lot of attention, owing to the potential practical applications of such surfaces—they literally repel water, which hardly sticks to them, bounces off after an impact and slips on them. In this short review, we describe how water repellency arises from the presence of hydrophobic microstructures at the solid surface. A drop deposited on such a substrate can float above the textures, mimicking at room temperature what happens on very hot plates; then, a vapour layer comes between the solid and the volatile liquid, as described long ago by Leidenfrost. We present several examples of superhydrophobic materials (either natural or synthetic), and stress more particularly the stability of the air cushion—the liquid could also penetrate the textures, inducing a very different wetting state, much more sticky, due to the possibility of pinning on the numerous defects. This description allows us to discuss (in quite a preliminary way) the optimal design to be given to a solid surface to make it robustly water repellent.

Performance Study of Nano-TiO2 Modified Fabric

2012 ◽  
Vol 549 ◽  
pp. 733-736
Author(s):  
Xiao Mian Chen ◽  
Jing Jing Shi ◽  
Hong Sha Su ◽  
Chun Ting Lin ◽  
En Long Yang
Keyword(s):  
Titanium Dioxide ◽  
Catalytic Activity ◽  
Catalytic Properties ◽  
Antibacterial Property ◽  
Wear Behavior ◽  
Water Repellency ◽  
Innovative Technology ◽  
Water Repellent ◽  
High Catalytic Activity ◽  
Performance Study

The catalytic properties of nano-TiO2 modified fabric suits the demand for self-cleaning in recent years. In this paper, advanced and innovative technology were used to synthesize water sol of titanium dioxide photocatalyst with high catalytic activity for fabric finishing. The wear behavior, antibacterial property and water repellency of treated and untreated fabric were tested. Results indicate that finishing and washing of the titanium dioxide had no effect on wear behavior; finished and washed fabric has a certain antibacterial and water repellent properties.

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