بررسي فاكتور حفاظتي فرابنفش پارچه هاي تشكيل شده از نخ هاي فلزي

چكيده انگليسي :

Investigation into UV Protection Factors of Fabrics Composed of Metallic Yarns Seyedeh Marjan Eslami Tabaei Sm eslamitabaei@tx iut ac ir 30 7 2011 Department of Textile Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor s Name and Email address Dr Mohammad Ghane M ghane@cc iut ac irAbstractRadiation is a dangerous inevitable aspect of human s life Man is a singular creature He has a set of giftsthat make them unique among animals Millions of years of biological evolution has not really fitted man toany specific environment On the contrary by comparison with evolved animals he has a rather crudepersonal survival kit His imagination reasoning and toughness make it possible for him to change theenvironment in which he lives He is not merely a figure in the landscape but a shaper of the landscape Hehas prevented or decreased the unfavorable effects of natural disasters due to his abilities and talent Radiation is energy emission in electromagnetic waves such as Gamma ultraviolet visible infrared orcorpuscle People are surrounded by things always emitting and absorbing radiative energy at the same time The past decade has witnessed an alarming increase in the incidence of skin cancer worldwide because ofultraviolet radiation Therefore protective textiles against ultraviolet radiation seem essential Spectroscopydiscusses the interaction between materials and electromagnetic waves Spectroscopy results provide theinformation about the amount of emitted or absorbed energy of samples It is one way of detecting unknowncomponents of a material Two subcategories of spectroscopy are atomic and molecular The latter one isused in the present project since the case studies are fabrics Molecular spectroscopy is responsibe for lightmeasurements of moleculs in gas solution and solid phase of materials while the atomic one talks about theatom vibrations of gas materials Using cotton polyestere and nylon 6 as warps and aluminum copper cotton polyester and nylon 6 as wefts six sample fabrics were woven and coded as cotton polyester nylon 6 cotton aluminum cotton copper nylon aluminum and nylon copper F44 and Smith were two machines withwhich samples were woven Warp and weft density of fabrics werw considered constant so that the effect ofmetal in fabrics structure could be investigated better Owing to some problems in preparing weavingmachines the use of metals i e copper and aluminum in warp direction was not feasible Spectrophotometer Jasco V 570 with its accessory ARN 475 was applied to measure the amount of absorbed rays in ultravioletregion The accessory part is nessary when the spectroscopy of solid samples is to be determined Cotton polyester and nylon 6 fabrics were considered as main samples to which other fabrics composed of metalwere compared In other word nylon aluminum alongside nylon copper and cotton aluminum alongsidecotton copper were compared to nylon 6 and cotton polyester respectively SPSS statistical software wasutilized to determine the level of comparison significance Two ANOVA and DUNCAN statistical tests wereapplied to make the comparisons meaningful Regarding the fact that copper emissivity coefficient is higherthan that of aluminum results were supposed to indicate more amount of electromagnetic waves absorptionin copper samples in comparison to aluminum ones But experimental results showed that copper had nosignificant effect on ultraviolet protection factor of woven fabrics composed of cotton polyester Converslyfor nylon 6 applying aluminum metal didn t cause any significant influence on improving ultravioletprotection factor Mentioned results could be attributed to different cover factors of woven samples Asresults denoted nylon 6 fabrics with copper metal as their wefts accounted for better ultraviolet protection But the contrary situation was tue for cotton polyester fabrics It means that using copper was useless inimproving ultraviolet protection factor of co

اسلامي طبائي، مرجان

بررسي فاكتور حفاظتي فرابنفش پارچه هاي تشكيل شده از نخ هاي فلزي

تابش , انرژي تابشي , طيف سنجي , امواج الكترومغناطيسي , ضريب گسيلمندي