Polhydroxbutyrates (PHBs) are well-known bio-based and biodegradable bacterial polyesters. In this study, the effects of polymer type, solution concentration and feeding rate on the electrospinnability of Poly(3-hydroxbutyrate) (PHB) and Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) PHBV nanofibers were investigated. First, PHB, PHBV and PHB/PHBV solutions with different polymer concentrations ranging between 5-11% wt. were prepared and characterized in terms of viscosity. Afterwards, electrospinning was performed and ultrafine fibers were produced. The surface morphology and the fiber diameters of the samples were investigated by scanning electron microscopy (SEM) analyses. Pore sizes of the samples were also calculated. In order to understand the wettability of the samples, contact angle measurements were conducted. The thermal properties and the crystallinity of the samples were investigated differential scanning calorimetry (DSC) analyses. The solution viscosities increased dramatically above %9 wt. of polymer concentration. SEM images revealed that decreasing feeding rate and increasing solution concentration resulted in fewer bead formation. On the other hand, fibers with diameters from 1.2 to 5.4 μm were produced with the increasing solution concentration and increasing voltage. All samples showed contact angle values above 90° indicating that they are hydrophobic. The PHB/PHBV blend surface showed the highest contact angle. DSC analyses showed that PHBV surface had significantly lower crystallization degree than PHB surface produced at the same concentration. It can be concluded that PHB fibers can be successfully produced by electrospinning.
{"title":"PRODUCTION AND CHARACTERIZATION OF PHB, PHBV ELECTROSPUN FIBERS AND THEIR BLENDS","authors":"Hatice Aybige AKDAĞ, Sebnem DUZYER GEBİZLİ, Aslı HOCKENBERGER","doi":"10.7216/teksmuh.1268253","DOIUrl":"https://doi.org/10.7216/teksmuh.1268253","url":null,"abstract":"Polhydroxbutyrates (PHBs) are well-known bio-based and biodegradable bacterial polyesters. In this study, the effects of polymer type, solution concentration and feeding rate on the electrospinnability of Poly(3-hydroxbutyrate) (PHB) and Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) PHBV nanofibers were investigated. First, PHB, PHBV and PHB/PHBV solutions with different polymer concentrations ranging between 5-11% wt. were prepared and characterized in terms of viscosity. Afterwards, electrospinning was performed and ultrafine fibers were produced. The surface morphology and the fiber diameters of the samples were investigated by scanning electron microscopy (SEM) analyses. Pore sizes of the samples were also calculated. In order to understand the wettability of the samples, contact angle measurements were conducted. The thermal properties and the crystallinity of the samples were investigated differential scanning calorimetry (DSC) analyses. The solution viscosities increased dramatically above %9 wt. of polymer concentration. SEM images revealed that decreasing feeding rate and increasing solution concentration resulted in fewer bead formation. On the other hand, fibers with diameters from 1.2 to 5.4 μm were produced with the increasing solution concentration and increasing voltage. All samples showed contact angle values above 90° indicating that they are hydrophobic. The PHB/PHBV blend surface showed the highest contact angle. DSC analyses showed that PHBV surface had significantly lower crystallization degree than PHB surface produced at the same concentration. It can be concluded that PHB fibers can be successfully produced by electrospinning.","PeriodicalId":35281,"journal":{"name":"Tekstil ve Muhendis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136279397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Semiha EREN, Hüseyin Aksel EREN, Gizem BAYAÇLI, İrem ÖZYURT
As a result of rapid population growth and industrialization, wastewater generated in various sectors poses a threat to the environment and living things.Textile industry wastewater comes first among these wastewater sources.These wastewaters contain dyestuffs and different chemicals. These waters, which contain many impurities, must be treated well, otherwise they may cause serious problems in the environments where they are discharged. Various physical, chemical and biological methods are used for color removal in wastewater. However, due to the cost and low efficiency of these methods, researches are carried out on innovative and more economical methods. Among the new technologies, advanced oxidation processes (AOPs) are highly efficient new methods being studied for the purification of certain impurities that cannot be removed by general techniques. AOP methods include photocatalytic reaction with UV, ultrasound, Fenton/Peroxide, ultrasound sound waves and similar reactions. One of these methods is ozonation method. In this study, ozone decolorization of wastewater after disperse dyeing taken from textile dyehouse was investigated. In the determined procedure, the removal of color by ozonation method, which is one of the advanced oxidation methods for wastewater recipes after dyeing, was investigated and the color absorbance and COD values of the samples were examined and the results were evaluated.
{"title":"COLOR REMOVAL OF DISPERSE DYEING WASTE WATER BY OZONE IN AN EXAMPLE DYEHAUSE","authors":"Semiha EREN, Hüseyin Aksel EREN, Gizem BAYAÇLI, İrem ÖZYURT","doi":"10.7216/teksmuh.1365908","DOIUrl":"https://doi.org/10.7216/teksmuh.1365908","url":null,"abstract":"As a result of rapid population growth and industrialization, wastewater generated in various sectors poses a threat to the environment and living things.Textile industry wastewater comes first among these wastewater sources.These wastewaters contain dyestuffs and different chemicals. These waters, which contain many impurities, must be treated well, otherwise they may cause serious problems in the environments where they are discharged. Various physical, chemical and biological methods are used for color removal in wastewater. However, due to the cost and low efficiency of these methods, researches are carried out on innovative and more economical methods. Among the new technologies, advanced oxidation processes (AOPs) are highly efficient new methods being studied for the purification of certain impurities that cannot be removed by general techniques. AOP methods include photocatalytic reaction with UV, ultrasound, Fenton/Peroxide, ultrasound sound waves and similar reactions. One of these methods is ozonation method. In this study, ozone decolorization of wastewater after disperse dyeing taken from textile dyehouse was investigated. In the determined procedure, the removal of color by ozonation method, which is one of the advanced oxidation methods for wastewater recipes after dyeing, was investigated and the color absorbance and COD values of the samples were examined and the results were evaluated.","PeriodicalId":35281,"journal":{"name":"Tekstil ve Muhendis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136343487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fatma Banu NERGİS, Cevza CANDAN, Sena Cimilli DURU
In the textile and clothing sector, a wide range of auxetic textiles have been made and shown great application potential in many areas. Creating auxetic effect at the yarn stage is relatively a simple approach since helical auxetic yarns (HAY) can be made only by winding or twisting different conventional filaments together with existing spinning machinery. Employing sports safety equipment is a cost-effective solution for avoiding injury and increasing the safety and protection. In the area of materials development for sports safety equipment, an important candidate is auxetic materials. In this study, polyester filament/elastane based helical auxetic yarns (HAY) and knitted fabrics from the yarns were developed that will offer dampening effect against injuries during sports activities. Effects of count of the elastane component and the presence of a third component in the HAY structure on the auxetic behaviour of the knitted fabrics were also studied.
{"title":"A NOVEL YARN FOR PERSONEL PROTECTION IN KNITTED SPORTSWEAR","authors":"Fatma Banu NERGİS, Cevza CANDAN, Sena Cimilli DURU","doi":"10.7216/teksmuh.1365889","DOIUrl":"https://doi.org/10.7216/teksmuh.1365889","url":null,"abstract":"In the textile and clothing sector, a wide range of auxetic textiles have been made and shown great application potential in many areas. Creating auxetic effect at the yarn stage is relatively a simple approach since helical auxetic yarns (HAY) can be made only by winding or twisting different conventional filaments together with existing spinning machinery. Employing sports safety equipment is a cost-effective solution for avoiding injury and increasing the safety and protection. In the area of materials development for sports safety equipment, an important candidate is auxetic materials. In this study, polyester filament/elastane based helical auxetic yarns (HAY) and knitted fabrics from the yarns were developed that will offer dampening effect against injuries during sports activities. Effects of count of the elastane component and the presence of a third component in the HAY structure on the auxetic behaviour of the knitted fabrics were also studied.","PeriodicalId":35281,"journal":{"name":"Tekstil ve Muhendis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136343665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shear thickening fluids are known to enhance the performance of ballistic fabrics. However, the effect of shear thickening performance is influenced by various factors, primarily, the concentration of the shear thickening fluids applied onto the fabric. The preparation of highly concentrated shear thickening fluid is difficult in laboratory conditions. They cause a weight increase in the fabrics. Thus, this study aims to investigate the effect of impregnation of shear thickening fluid onto fabrics at lower concentrations. To this aim, shear thickening fluids were prepared at two concentrations (5% and 10%) and applied to three different types of para-aramid fabrics. Yarn pull-out test was established to check the effect of shear thickening fluid on frictional force between yarns of fabrics. Moreover, drop weight impact tests were applied to see the effect of shear thickening impregnation on the energy absorption behaviour of the single-ply ballistic fabrics. The findings were interpreted according to the concentration of shear thickening fluid solution as well as the fabric types.
{"title":"YARN PULL-OUT AND DROP WEIGHT IMPACT PERFORMANCE OF SHEAR THICKENING FLUID IMPREGNATED BALLISTIC FABRICS","authors":"Nazan OKUR, Canan SARICAM","doi":"10.7216/teksmuh.1365872","DOIUrl":"https://doi.org/10.7216/teksmuh.1365872","url":null,"abstract":"Shear thickening fluids are known to enhance the performance of ballistic fabrics. However, the effect of shear thickening performance is influenced by various factors, primarily, the concentration of the shear thickening fluids applied onto the fabric. The preparation of highly concentrated shear thickening fluid is difficult in laboratory conditions. They cause a weight increase in the fabrics. Thus, this study aims to investigate the effect of impregnation of shear thickening fluid onto fabrics at lower concentrations. To this aim, shear thickening fluids were prepared at two concentrations (5% and 10%) and applied to three different types of para-aramid fabrics. Yarn pull-out test was established to check the effect of shear thickening fluid on frictional force between yarns of fabrics. Moreover, drop weight impact tests were applied to see the effect of shear thickening impregnation on the energy absorption behaviour of the single-ply ballistic fabrics. The findings were interpreted according to the concentration of shear thickening fluid solution as well as the fabric types.","PeriodicalId":35281,"journal":{"name":"Tekstil ve Muhendis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136343662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bu araştırmada gömlek giyimi ile ilgili tüketici konfor deneyimlerinin ve tüketici beklentilerinin ortaya konması amaçlanmıştır. Deneyim ve beklentinin yanında tüketicilerin konfora/görünüşe/fonksiyonelliğe önem verme dereceleri, gömlek tercihinde etkili olan özellikler ve gömlek kumaşlarında tercih edilen lif türleri de incelenmiştir. Yaşa ve cinsiyete göre farklılıklar da değerlendirilmiştir. Bu araştırma tarama modelli bir araştırmadır. Araştırmanın verileri anket formu aracılığıyla toplanmıştır. Araştırmaya 132 kişi katılmıştır. Araştırma kapsamında elde edilen veriler SPSS programı ile istatistiksel olarak analiz edilmiştir. Araştırma sonuçlarında; gömlek giyme deneyiminde; dokunsal deneyimin istatistiksel olarak cinsiyete göre değiştiği ve kadınların erkeklere göre daha yüksek deneyim puanına sahip oldukları tespit edilmiştir. Hareket konforu deneyimi ise istatistiksel olarak cinsiyete göre değişmemiştir. Konfor/kullanım/bakım beklentisinin cinsiyete göre istatistiksel olarak değiştiği ve kadınların erkeklere göre daha yüksek beklenti puanına sahip oldukları tespit edilmiştir. Gömlek tercihinde etkili olan en önemli özellikler bedene uygunluk, konfor ve stil/model iken en az önemli özellikler üretim yeri, marka ve modaya uygunluktur. Cinsiyetin marka, konfor ve kolay bakım değerlendirmelerinde istatistiksel olarak etkili olduğu, kadınların konfor ve kolay bakımı erkeklere göre daha önemli buldukları, erkeklerin ise markayı kadınlara göre daha önemli buldukları sonucuna ulaşılmıştır. Yaş; sadece konfor değerlendirmesinde istatistiksel olarak etkilidir ve 55-75 yaş grubunun konfora en az önem veren grup olduğu tespit edilmiştir. Kadınların erkeklere göre konfora ve fonksiyonelliğe daha çok önem verdikleri, görünüşe ise kadın ve erkeklerin benzer derecede önem verdikleri görülmüştür. Tüketicilerin gömlek giyiminde en çok pamuk lifini sonrasında keten, keten pamuk, ipek gibi doğal içerikli lifleri tercih ettikleri en az ise sentetikler lif grubunda yer alan akrilik lifini tercih ettikleri tespit edilmiştir.
{"title":"GÖMLEK GİYİMİ İLE İLGİLİ TÜKETİCİ KONFOR DENEYİMLERİNİN VE TÜKETİCİ BEKLENTİLERİNİN İNCELENMESİ","authors":"Selma DOLANBAY DOĞAN, Nurgul KILINÇ","doi":"10.7216/teksmuh.1273775","DOIUrl":"https://doi.org/10.7216/teksmuh.1273775","url":null,"abstract":"Bu araştırmada gömlek giyimi ile ilgili tüketici konfor deneyimlerinin ve tüketici beklentilerinin ortaya konması amaçlanmıştır. Deneyim ve beklentinin yanında tüketicilerin konfora/görünüşe/fonksiyonelliğe önem verme dereceleri, gömlek tercihinde etkili olan özellikler ve gömlek kumaşlarında tercih edilen lif türleri de incelenmiştir. Yaşa ve cinsiyete göre farklılıklar da değerlendirilmiştir. Bu araştırma tarama modelli bir araştırmadır. Araştırmanın verileri anket formu aracılığıyla toplanmıştır. Araştırmaya 132 kişi katılmıştır. Araştırma kapsamında elde edilen veriler SPSS programı ile istatistiksel olarak analiz edilmiştir. Araştırma sonuçlarında; gömlek giyme deneyiminde; dokunsal deneyimin istatistiksel olarak cinsiyete göre değiştiği ve kadınların erkeklere göre daha yüksek deneyim puanına sahip oldukları tespit edilmiştir. Hareket konforu deneyimi ise istatistiksel olarak cinsiyete göre değişmemiştir. Konfor/kullanım/bakım beklentisinin cinsiyete göre istatistiksel olarak değiştiği ve kadınların erkeklere göre daha yüksek beklenti puanına sahip oldukları tespit edilmiştir. Gömlek tercihinde etkili olan en önemli özellikler bedene uygunluk, konfor ve stil/model iken en az önemli özellikler üretim yeri, marka ve modaya uygunluktur. Cinsiyetin marka, konfor ve kolay bakım değerlendirmelerinde istatistiksel olarak etkili olduğu, kadınların konfor ve kolay bakımı erkeklere göre daha önemli buldukları, erkeklerin ise markayı kadınlara göre daha önemli buldukları sonucuna ulaşılmıştır. Yaş; sadece konfor değerlendirmesinde istatistiksel olarak etkilidir ve 55-75 yaş grubunun konfora en az önem veren grup olduğu tespit edilmiştir. Kadınların erkeklere göre konfora ve fonksiyonelliğe daha çok önem verdikleri, görünüşe ise kadın ve erkeklerin benzer derecede önem verdikleri görülmüştür. Tüketicilerin gömlek giyiminde en çok pamuk lifini sonrasında keten, keten pamuk, ipek gibi doğal içerikli lifleri tercih ettikleri en az ise sentetikler lif grubunda yer alan akrilik lifini tercih ettikleri tespit edilmiştir.","PeriodicalId":35281,"journal":{"name":"Tekstil ve Muhendis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136343601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dyestuffs are used in almost every industry. However, due to the negative effects of synthetic dyestuffs on the environment and human health, environmentally friendly natural dyestuffs have gained importance in recent years, especially in the textile sector. Mostly plant and plant waste-based dyes are used in coloring fabrics with natural dyes. However, with the developments in the field of biotechnology, there are also studies in which pigment is produced by microorganisms. Within the scope of this study, 100% cotton woven fabric was dyed using 6 different processes with 3 bio-colors, pink, blue and brown, produced by bacterial fermentation. The dyeings were carried out in the absence of chemicals, in the presence of salt, salt-soda, salt-alum, salt-soda-alum and alum respectively. In order to evaluate the dyeing performance, the CIELab values of the fabrics were measured and their color fastness to washing, water, alkali and acid perspiration and also dry and wet rubbing fastness were checked. As a result of the studies, it was concluded that each dyestuff react in a different way with a different process. While the most suitable process for blue and pink bio-color is that salt used process, the highest K/S value with brown bio-color was obtained as a result of dyeing with salt-soda. All fastness values of the dyed fabrics were quite good. As a result of the trials, it can be said that laboratory-scale studies of bio-colors obtained by bacterial fermentation are promising for the future.
{"title":"INVESTIGATION OF THE DYEABILITY OF COTTON FABRICS WITH BACTERIAL COLORANTS","authors":"Hülya KICIK, Çağla GÖKBULUT","doi":"10.7216/teksmuh.1365865","DOIUrl":"https://doi.org/10.7216/teksmuh.1365865","url":null,"abstract":"Dyestuffs are used in almost every industry. However, due to the negative effects of synthetic dyestuffs on the environment and human health, environmentally friendly natural dyestuffs have gained importance in recent years, especially in the textile sector. Mostly plant and plant waste-based dyes are used in coloring fabrics with natural dyes. However, with the developments in the field of biotechnology, there are also studies in which pigment is produced by microorganisms. Within the scope of this study, 100% cotton woven fabric was dyed using 6 different processes with 3 bio-colors, pink, blue and brown, produced by bacterial fermentation. The dyeings were carried out in the absence of chemicals, in the presence of salt, salt-soda, salt-alum, salt-soda-alum and alum respectively. In order to evaluate the dyeing performance, the CIELab values of the fabrics were measured and their color fastness to washing, water, alkali and acid perspiration and also dry and wet rubbing fastness were checked. As a result of the studies, it was concluded that each dyestuff react in a different way with a different process. While the most suitable process for blue and pink bio-color is that salt used process, the highest K/S value with brown bio-color was obtained as a result of dyeing with salt-soda. All fastness values of the dyed fabrics were quite good. As a result of the trials, it can be said that laboratory-scale studies of bio-colors obtained by bacterial fermentation are promising for the future.","PeriodicalId":35281,"journal":{"name":"Tekstil ve Muhendis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136343664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kişisel termal yönetimin sağlanmasına yönelik, değişen vücut ve çevre şartlarına adapte olabilen pasif ve aktif akıllı tekstil yapıları ile artırılmış konfor ve azalan enerji gereksinimi gibi konularda avantajlar sağlanabilmektedir. Bu çalışmada, dünya için gün geçtikçe önem kazanan enerji kısıtlarına bağlı olarak, ekstra enerji harcanmadan doğal radyasyon enerji bileşenleri (ultraviyole, görünür, infrared) ve mekanizmalarının (yayılım, yansıtma, absorpsiyon, geçirgenlik) yönetimiyle vücudun termal dengesini ısıtma/soğutma veya ısıtma-soğutmayı birlikte sağlayarak koruyan yapılar, etkili radyasyon ısı transfer mekanizmaları ışığında incelenmiştir. Bu tür pasif akıllı yapılar için kullanılan ölçüm yöntemleri, mevcut çalışmaların eksik noktaları ve ilerleme yönü konularında da literatür ışığında değerlendirmeler yapılmıştır. Mevcut çalışmaların son dönemde, küresel ısınmanın etkilerinin de somut olarak hissedilmesiyle birlikte, radyasyonla iç ortamlarda kişisel soğutma konusunda yoğunlaştığı, dış ortamda geçerli olan karmaşık mekanizmaların tasarım ve ölçümleri zorlaştırdığı sonucuna varılmıştır. Ayrıca, çalışmalarda yapıların giyilebilirlikleri açısından önemli olan tutum, konfor ve radyasyon dışındaki ısı ve kütle transfer mekanizmalarının bütüncül olarak incelenmeleri konusunda eksiklikler tespit edilmiştir. Çalışmalar, konfor ve enerji tasarrufu beklentilerinin hızla değiştiği günümüzde radyasyon enerjisi yönetimiyle ısıtma/soğutma yapan yapıların vücut ve ortam koşullarına otonom olarak uyum sağlayabilecek şekilde tasarlanması yönünde ilerlemektedir.
{"title":"DOĞAL RADYASYONUN YÖNETİMİYLE TASARLANAN KİŞİSEL TERMAL YÖNETİM SAĞLAYAN PASİF AKILLI YAPILAR","authors":"Sibel KAPLAN, Nazife KORKMAZ MEMİŞ","doi":"10.7216/teksmuh.1271662","DOIUrl":"https://doi.org/10.7216/teksmuh.1271662","url":null,"abstract":"Kişisel termal yönetimin sağlanmasına yönelik, değişen vücut ve çevre şartlarına adapte olabilen pasif ve aktif akıllı tekstil yapıları ile artırılmış konfor ve azalan enerji gereksinimi gibi konularda avantajlar sağlanabilmektedir. Bu çalışmada, dünya için gün geçtikçe önem kazanan enerji kısıtlarına bağlı olarak, ekstra enerji harcanmadan doğal radyasyon enerji bileşenleri (ultraviyole, görünür, infrared) ve mekanizmalarının (yayılım, yansıtma, absorpsiyon, geçirgenlik) yönetimiyle vücudun termal dengesini ısıtma/soğutma veya ısıtma-soğutmayı birlikte sağlayarak koruyan yapılar, etkili radyasyon ısı transfer mekanizmaları ışığında incelenmiştir. Bu tür pasif akıllı yapılar için kullanılan ölçüm yöntemleri, mevcut çalışmaların eksik noktaları ve ilerleme yönü konularında da literatür ışığında değerlendirmeler yapılmıştır. Mevcut çalışmaların son dönemde, küresel ısınmanın etkilerinin de somut olarak hissedilmesiyle birlikte, radyasyonla iç ortamlarda kişisel soğutma konusunda yoğunlaştığı, dış ortamda geçerli olan karmaşık mekanizmaların tasarım ve ölçümleri zorlaştırdığı sonucuna varılmıştır. Ayrıca, çalışmalarda yapıların giyilebilirlikleri açısından önemli olan tutum, konfor ve radyasyon dışındaki ısı ve kütle transfer mekanizmalarının bütüncül olarak incelenmeleri konusunda eksiklikler tespit edilmiştir. Çalışmalar, konfor ve enerji tasarrufu beklentilerinin hızla değiştiği günümüzde radyasyon enerjisi yönetimiyle ısıtma/soğutma yapan yapıların vücut ve ortam koşullarına otonom olarak uyum sağlayabilecek şekilde tasarlanması yönünde ilerlemektedir.","PeriodicalId":35281,"journal":{"name":"Tekstil ve Muhendis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136343672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Using leftover industrial curtain fabrics, this study aims to develop environmentally friendly acoustic panels. In this context, two forms of curtain fabric waste, blackout and dimout, which are segregated as waste from post-production process within Oba Perdesan, are transformed into fiber utilizing mini shredder. The hot press method is used to produce composite samples made of 100% blackout and 50% blackout/ 50% dimout fabric waste in two different thicknesses (0.5 and 1 cm). The thickness, density, basis weight, FTIR, sound absorption coefficient, and sound transmission loss of the manufactured panels are measured. The FTIR analysis reveals the distinctive peaks of the raw materials of the structures, while the acoustic test results show that the sound absorption coefficient and sound transmission loss increase along with the thickness and basis weight of the structures, respectively. While the 1 cm blackout/dimout blend sample has a superior sound absorption coefficient for 2000 Hz with 0.81, the 1 cm 100% blackout sample performs highest with 10dB sound transmission loss. The produced panels aid in solid waste management while consuming minimal raw materials, and an essential step is taken toward the development of sustainable, practical, and decorative panels.
本研究旨在利用工业窗帘布的剩余材料，开发环保型隔音板。在这种情况下，两种形式的窗帘织物废料，blackout和dimout，在Oba Perdesan内作为后期制作过程的废物被隔离，利用迷你碎纸机转化为纤维。采用热压法制备两种不同厚度(0.5 cm和1 cm)的100%遮光和50%遮光/ 50%遮光废布复合样品。测量了板材的厚度、密度、基重、FTIR、吸声系数和传声损失。FTIR分析显示结构的原材料具有明显的峰值，声学测试结果表明，吸声系数和传声损失分别随着结构的厚度和基重的增加而增加。1 cm暗/暗混合样品的吸声系数为0.81，为2000 Hz，而1 cm 100%暗混合样品的吸声系数最高，声音传输损失为10dB。所生产的面板有助于固体废物管理，同时消耗最少的原材料，并且朝着可持续，实用和装饰面板的发展迈出了重要的一步。
{"title":"ENVIRONMENTALLY FRIENDLY ACOUSTIC PANEL DESIGN FROM CURTAIN WASTE","authors":"Gamze AÇIKGÖZ, Onur AYDIN, Alp Yaman ALTUĞ, Hande SEZGİN, İpek YALÇIN ENİŞ","doi":"10.7216/teksmuh.1365898","DOIUrl":"https://doi.org/10.7216/teksmuh.1365898","url":null,"abstract":"Using leftover industrial curtain fabrics, this study aims to develop environmentally friendly acoustic panels. In this context, two forms of curtain fabric waste, blackout and dimout, which are segregated as waste from post-production process within Oba Perdesan, are transformed into fiber utilizing mini shredder. The hot press method is used to produce composite samples made of 100% blackout and 50% blackout/ 50% dimout fabric waste in two different thicknesses (0.5 and 1 cm). The thickness, density, basis weight, FTIR, sound absorption coefficient, and sound transmission loss of the manufactured panels are measured. The FTIR analysis reveals the distinctive peaks of the raw materials of the structures, while the acoustic test results show that the sound absorption coefficient and sound transmission loss increase along with the thickness and basis weight of the structures, respectively. While the 1 cm blackout/dimout blend sample has a superior sound absorption coefficient for 2000 Hz with 0.81, the 1 cm 100% blackout sample performs highest with 10dB sound transmission loss. The produced panels aid in solid waste management while consuming minimal raw materials, and an essential step is taken toward the development of sustainable, practical, and decorative panels.","PeriodicalId":35281,"journal":{"name":"Tekstil ve Muhendis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136343661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M Murat PEKSEN, Fatma Banu NERGİS, Cevza CANDAN, Bilge KOYUNCU
The requirements placed on the textile industry are changing drastically. Zero-emission targets for 2030 and beyond require cross-sectoral changes. This also challenges the textile industry to find viable all-in solutions that satisfy social, economic, and sustainable requirements. Currently, the use of textiles in transdisciplinary sectors demands a high level of tailor-made solutions. This requires a broad understanding of the processed materials, complex multiphysics as well as machine settings. Hence, to consolidate high production rates with optimal energy consumption and the use of sustainable resources, systematic research and product development need to be pursued. The digitalisation of research and production in the textile industry aids to close the gap between the complex production processes and the quality measure of the end products. For this purpose, a systematic approach comprising experimental measurements and emerging digital technologies is used. nonwoven manufacturing machine park results have been used for the benchmark study.
{"title":"DIGITALISED NONWOVEN MANUFACTURING FOR REDUCED ENERGY CONSUMPTION AND EFFICIENT PRODUCTION RATES","authors":"M Murat PEKSEN, Fatma Banu NERGİS, Cevza CANDAN, Bilge KOYUNCU","doi":"10.7216/teksmuh.1365862","DOIUrl":"https://doi.org/10.7216/teksmuh.1365862","url":null,"abstract":"The requirements placed on the textile industry are changing drastically. Zero-emission targets for 2030 and beyond require cross-sectoral changes. This also challenges the textile industry to find viable all-in solutions that satisfy social, economic, and sustainable requirements. Currently, the use of textiles in transdisciplinary sectors demands a high level of tailor-made solutions. This requires a broad understanding of the processed materials, complex multiphysics as well as machine settings. Hence, to consolidate high production rates with optimal energy consumption and the use of sustainable resources, systematic research and product development need to be pursued. The digitalisation of research and production in the textile industry aids to close the gap between the complex production processes and the quality measure of the end products. For this purpose, a systematic approach comprising experimental measurements and emerging digital technologies is used. nonwoven manufacturing machine park results have been used for the benchmark study.","PeriodicalId":35281,"journal":{"name":"Tekstil ve Muhendis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136343663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
İbrahim ÜNER, Sultan CAN, Banu Hatice GÜRCÜM, Asım Egemen YILMAZ, Ertuğrul AKSOY
Frequency Selective Surface (FSS) is a specialized structure used in the field of electromagnetic waves and radio frequency (RF) engineering. It is designed to exhibit selective transmission or reflection properties based on the frequency of the incident electromagnetic waves. This article describes the design, construction, and analysis of a textile-based band-stop frequency selective surface for use in the highly EM-polluted GSM, Wi-Fi, LTE, and WiMAX bands. A full-wave EM solver called CST Microwave Studio was used to develop and simulate the unit cell of the proposed FSS at the relevant frequency. In this study, embroidered and screen-printed textile based FSSs were designed. According to the results of this study, it was demonstrated that both embroidery and screen printing FSSs exhibit resonance at a frequency of 3.5 GHz. The screen printing method yielded the best results in terms of resonance frequency sensitivity, while the embroidery method showed a resonance frequency shift. It was observed that the stitch directions and density are important parameters in the embroidery method. Gaps between the embroidery paths in the production of embroidered FSSs resulted in differences from simulations due to the disruption of the structural integrity of the unit cell. Consequently, textile-based FSSs offer advantages over traditional FSSs. This study highlights the potential of textile FSSs as an effective means of reducing electromagnetic pollution, and suggests that further improvements in the design and production processes of textile FSSs can be made.
{"title":"COMPARATIVE ANALYSIS OF EMBROIDERY AND SCREEN-PRINTING TECHNIQUES FOR TEXTILE-BASED FREQUENCY SELECTIVE SURFACES","authors":"İbrahim ÜNER, Sultan CAN, Banu Hatice GÜRCÜM, Asım Egemen YILMAZ, Ertuğrul AKSOY","doi":"10.7216/teksmuh.1365882","DOIUrl":"https://doi.org/10.7216/teksmuh.1365882","url":null,"abstract":"Frequency Selective Surface (FSS) is a specialized structure used in the field of electromagnetic waves and radio frequency (RF) engineering. It is designed to exhibit selective transmission or reflection properties based on the frequency of the incident electromagnetic waves. This article describes the design, construction, and analysis of a textile-based band-stop frequency selective surface for use in the highly EM-polluted GSM, Wi-Fi, LTE, and WiMAX bands. A full-wave EM solver called CST Microwave Studio was used to develop and simulate the unit cell of the proposed FSS at the relevant frequency. In this study, embroidered and screen-printed textile based FSSs were designed. According to the results of this study, it was demonstrated that both embroidery and screen printing FSSs exhibit resonance at a frequency of 3.5 GHz. The screen printing method yielded the best results in terms of resonance frequency sensitivity, while the embroidery method showed a resonance frequency shift. It was observed that the stitch directions and density are important parameters in the embroidery method. Gaps between the embroidery paths in the production of embroidered FSSs resulted in differences from simulations due to the disruption of the structural integrity of the unit cell. Consequently, textile-based FSSs offer advantages over traditional FSSs. This study highlights the potential of textile FSSs as an effective means of reducing electromagnetic pollution, and suggests that further improvements in the design and production processes of textile FSSs can be made.","PeriodicalId":35281,"journal":{"name":"Tekstil ve Muhendis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136343671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：