Improved abrasion resistance of textile fabrics due to polymer coatings

2018 ◽  
Vol 49 (5) ◽  
pp. 572-583
Author(s):  
Martin Wortmann ◽  
Natalie Frese ◽  
Lubos Hes ◽  
Armin Gölzhäuser ◽  
Elmar Moritzer ◽  
...  
Keyword(s):  
Water Vapor ◽  
Abrasion Resistance ◽  
Polymer Coatings ◽  
Contact Angles ◽  
Woven Fabrics ◽  
Vapor Transport ◽  
Water Vapor Transport ◽  
Slight Reduction ◽  
Textile Fabrics ◽  
Technical Textiles

Textile fabrics are often subject to abrasion, starting from exposed parts of garments to a variety of technical textiles. Abrasion protection by usual coatings, however, can significantly decrease the water vapor transport through a fabric which is often not desired, especially in the case of garments. In our paper, we report on an approach to combine increased abrasion resistance with sufficient water vapor transport properties. For this, different polymers (poly(methyl methacrylate), acrylonitrile butadiene styrene, or amorphous polyamides) were coated on cotton and polyester woven fabrics. The results of abrasion tests against sandpaper show significantly increased abrasion resistance. The absolute evaporation resistance, measured by a Permetest testing device, was only slightly increased up to values still acceptable for typical garments. Images of all coatings by helium ion microscopy deliver an explanation for the measuring results. Polymer coatings on the polyester fabric resulted in a slight reduction of the hydrophobicity, while coating the cotton fabric severely increased the contact angles of the originally superhydrophilic material.

Effect of polymer coatings from CO2, on water-vapor transport in porous media

AIChE Journal ◽  
2002 ◽  
Vol 48 (5) ◽  
pp. 941-952 ◽  
Author(s):  
Florence E. Hénon ◽  
Ruben G. Carbonell ◽  
Joseph M. Desimone
Keyword(s):  
Porous Media ◽  
Water Vapor ◽  
Polymer Coatings ◽  
Vapor Transport ◽  
Water Vapor Transport ◽  
Transport In Porous Media

Statistical modeling of water vapor transport through woven fabrics

2012 ◽  
Vol 82 (3) ◽  
pp. 211-219 ◽  
Author(s):  
Seungsin Lee ◽  
S Kay Obendorf
Keyword(s):  
Water Vapor ◽  
Woven Fabrics ◽  
Vapor Transport ◽  
Water Vapor Transport ◽  
Cover Factor ◽  
Fabric Thickness ◽  
Packing Factor ◽  
Yarn Twist ◽  
Twist Factor ◽  
Water Vapor Transmission

Water vapor transport through textile structures is complicated and governed by various factors, including fabric openness, fabric thickness, pore size, and intrinsic fiber properties. The objective of this study is to understand parameters that are critical in the moisture vapor transport through woven textiles and develop a predictive model that describes water vapor transport of woven fabrics using those parameters. Fifteen woven fabrics with various fabric thickness, weight, fabric construction, and staple fiber type were selected, and the water vapor transmission rate, fabric thickness, fabric count, weight, yarn number, yarn twist, yarn diameter, and pore size distribution were measured. Based on the mechanisms of water vapor transmission through porous textile materials, the fabric cover factor, solid volume fraction, yarn twist factor, and yarn packing factor were computed and used as possible predictor variables in the modeling. Moisture regains of fiber were obtained from literature and used as a possible predictor variable. Statistical analyses were performed to examine the relationship between these parameters and water vapor transmission. Statistical analyses revealed that fabric thickness, fabric cover factor, mean flow pore diameter of fabric, and moisture regain of fiber were significant parameters affecting water vapor transmission through woven fabrics. The adjusted R2 value for the final model selected was 0.97. Influence of yarn twist factor and yarn packing factor were shown to be insignificant at the 5% significance level for these experimental conditions.

scholarly journals Extreme Floods in the Eastern Part of Europe: Large-Scale Drivers and Associated Impacts

Water ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1122
Author(s):  
Monica Ionita ◽  
Viorica Nagavciuc
Keyword(s):  
Water Vapor ◽  
Heavy Rainfall ◽  
Large Scale ◽  
Vapor Transport ◽  
Water Vapor Transport ◽  
Flood Events ◽  
Rainfall Events ◽  
Catchment Areas ◽  
Large Scale Atmospheric Circulation ◽  
Heavy Rainfall Events

The role of the large-scale atmospheric circulation in producing heavy rainfall events and floods in the eastern part of Europe, with a special focus on the Siret and Prut catchment areas (Romania), is analyzed in this study. Moreover, a detailed analysis of the socio-economic impacts of the most extreme flood events (e.g., July 2008, June–July 2010, and June 2020) is given. Analysis of the largest flood events indicates that the flood peaks have been preceded up to 6 days in advance by intrusions of high Potential Vorticity (PV) anomalies toward the southeastern part of Europe, persistent cut-off lows over the analyzed region, and increased water vapor transport over the catchment areas of Siret and Prut Rivers. The vertically integrated water vapor transport prior to the flood peak exceeds 300 kg m−1 s−1, leading to heavy rainfall events. We also show that the implementation of the Flood Management Plan in Romania had positive results during the 2020 flood event compared with the other flood events, when the authorities took several precaution measurements that mitigated in a better way the socio-economic impact and risks of the flood event. The results presented in this study offer new insights regarding the importance of large-scale atmospheric circulation and water vapor transport as drivers of extreme flooding in the eastern part of Europe and could lead to a better flood forecast and flood risk management.

scholarly journals Analysis of Intense Poleward Water Vapor Transports into High Latitudes of Western North America

2009 ◽  
Vol 24 (6) ◽  
pp. 1732-1747 ◽  
Author(s):  
Alain Roberge ◽  
John R. Gyakum ◽  
Eyad H. Atallah
Keyword(s):  
Water Vapor ◽  
North America ◽  
Vapor Transport ◽  
Water Vapor Transport ◽  
Western Coast ◽  
Synoptic Scale ◽  
The Pacific ◽  
The Pacific Ocean ◽  
Subtropical Oceans ◽  
Pineapple Express

Abstract Significant cool season precipitation along the western coast of North America is often associated with intense water vapor transport (IWVT) from the Pacific Ocean during favorable synoptic-scale flow regimes. These relatively narrow and intense regions of water vapor transport can originate in either the tropical or subtropical oceans, and sometimes have been referred to as Pineapple Express events in previous literature when originating near Hawaii. However, the focus of this paper will be on diagnosing the synoptic-scale signatures of all significant water vapor transport events associated with poleward moisture transport impacting the western coast of Canada, regardless of the exact points of origin of the associated atmospheric river. A trajectory analysis is used to partition the events as a means of creating coherent and meaningful synoptic-scale composites. The results indicate that these IWVT events can be clustered by the general area of origin of the majority of the saturated parcels impacting British Columbia and the Yukon Territories. IWVT events associated with more zonal trajectories are characterized by a strong and mature Aleutian low, whereas IWVT events associated with more meridional trajectories are often characterized by an anticyclone situated along the California or Oregon coastline, and a relatively mature poleward-traveling cyclone, commonly originating in the central North Pacific.

A Theoretical Model of Localized Heat and Water Vapor Transport in the Human Respiratory Tract

1986 ◽  
Vol 108 (1) ◽  
pp. 19-27 ◽  
Author(s):  
L. M. Hanna ◽  
P. W. Scherer
Keyword(s):  
Water Vapor ◽  
Theoretical Model ◽  
Respiratory Tract ◽  
Air Conditioning ◽  
High Stress ◽  
Vapor Transport ◽  
Water Vapor Transport ◽  
Upper Respiratory Tract ◽  
Transfer Coefficients ◽  
Human Respiratory Tract

A steady-state, one-dimensional theoretical model of human respiratory heat and water vapor transport is developed. Local mass transfer coefficients measured in a cast replica of the upper respiratory tract are incorporated into the model along with heat transfer coefficients determined from the Chilton-Colburn analogy and from data in the literature. The model agrees well with reported experimental measurements and predicts that the two most important parameters of the human air-conditioning process are: 1) the blood temperature distribution along the airway walls, and 2) the total cross-sectional area and perimeter of the nasal cavity. The model also shows that the larynx and pharynx can actually gain water over a respiratory cycle and are the regions of the respiratory tract most subject to drying. With slight modification, the model can be used to investigate respiratory heat and water vapor transport in high stress environments, pollutant gas uptake in the respiratory tract, and the connection between respiratory air-conditioning and the function of the mucociliary escalator.

Sign in / Sign up

Export Citation Format

Share Document