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He J.C.,Donghua University | Li J.,Key Laboratory of Clothing Design and Technology
Advanced Materials Research | Year: 2013

The study is to weave the yarns of silver-plated fiber and photocatalyst fiber together to make 18 kinds of fabrics with different woven proportions and structures, and conduct antibacterial experiments on the fabrics with agar diffusion plate method. The experimental results show that for the strains of E.coli and Staphylococcus aureus, with the increasing woven proportion of silver-plated fiber and photocatalyst fiber, the width of inhibition zone grows; and in the condition of the same woven proportion of the two fibers, the plain weave fabric has the best antibacterial activity. And overall considering the antibacterial activity, cost and safety of the fabric, the plain weave fabric with 12.5% distribution ratio of silver-plated fiber is the optimal antibacterial fabric among the 18 samples. © (2013) Trans Tech Publications, Switzerland. Source

Lu Y.,Soochow University of China | Song G.,University of Alberta | Li J.,Donghua University | Li J.,Key Laboratory of Clothing Design and Technology
Applied Ergonomics | Year: 2014

The garment fit played an important role in protective performance, comfort and mobility. The purpose of this study is to quantify the air gap to quantitatively characterize a three-dimensional (3-D) garment fit using a 3-D body scanning technique. A method for processing of scanned data was developed to investigate the air gap size and distribution between the clothing and human body. The mesh model formed from nude and clothed body was aligned, superimposed and sectioned using Rapidform software. The air gap size and distribution over the body surface were analyzed. The total air volume was also calculated. The effects of fabric properties and garment size on air gap distribution were explored. The results indicated that average air gap of the fit clothing was around 25-30 mm and the overall air gap distribution was similar. The air gap was unevenly distributed over the body and it was strongly associated with the body parts, fabric properties and garment size. The research will help understand the overall clothing fit and its association with protection, thermal and movement comfort, and provide guidelines for clothing engineers to improve thermal performance and reduce physiological burden. © 2014 Elsevier Ltd and The Ergonomics Society. Source

Su Y.,Donghua University | He J.,Donghua University | Li J.,Donghua University | Li J.,Key Laboratory of Clothing Design and Technology
Applied Thermal Engineering | Year: 2016

A finite difference model was introduced to simulate the transmitted and stored energy in firefighters' protective clothing exposed to low-level thermal radiation. The model domain consists of a three-layer fire-resistant fabric system (outer shell, moisture barrier, and thermal liner), the human skin, and the air gap between clothing and the skin. The model accounted for the relationship between the transmitted heat during the exposure and the discharged heat during the cooling-down period. The numerical model predictions were compared with experimental data. Additionally, the parameters that affect the transmitted and stored energy of protective clothing were investigated. The results demonstrate that for the typical multilayer firefighter protective clothing, the transmitted heat during exposure and the discharged heat after exposure totally determine the skin burn under low-level heat exposure, especially for third-degree skin burns. The findings obtained in this study can be used to engineer fabric systems that provide better protection for the stored thermal burn. © 2015 Elsevier Ltd. All rights reserved. Source

Lu Y.,Donghua University | Song G.,University of Alberta | Zeng H.,University of Alberta | Zhang L.,University of Alberta | And 2 more authors.
Textile Research Journal | Year: 2014

Hot liquid hazards present in work environments are well known to be a considerable risk in workplace safety for numerous industries. In this work, the effects of different liquids and temperatures on penetration performance of fabrics were investigated, and the influence of impingement angle on protective performance of liquid penetration was also studied. Several kinds of fabrics for protective clothing were used to characterize the penetration behaviors of protective materials. The results showed the liquid temperature had a significant impact on the stored and penetrated amount of liquids. Different liquids can lead to distinct damage to fabrics. The impingement angle affects liquid transfer (storage and penetration) through the fabric. The addition of a thermal liner or moisture barrier can sharply decrease the penetration. The results provide new insights into the development of functional garments/materials and better methods for evaluating the performance of these materials under hazardous work environments. © The Author(s) 2014 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav. Source

Lu Y.,Donghua University | Lu Y.,University of Alberta | Song G.,University of Alberta | Ackerman M.Y.,University of Alberta | And 3 more authors.
Experimental Thermal and Fluid Science | Year: 2013

A hot liquid splash tester and a protocol were developed to investigate the thermal protective performance and impact penetration performance of fabrics used in protective clothing. The instrument developed could be used to characterize penetration resistance and thermal protection against hot liquid splash. Different liquids were employed to explore the effect of liquid properties on penetration performance and thermal protection. The correlation between penetration and thermal protection was discussed. The results showed that liquid viscosity and fabric surface property determined the impact penetration. Impermeable fabrics showed better protection than permeable fabrics. Increasing penetration resistance improved thermal protection of a permeable fabric. Liquid thermal diffusivity, mass transfer rate and total amount affected heat transfer through the fabric to skin simulant. The findings will provide technical data to improve protective material performance and modify test standard. © 2012. Source

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