An awareness of environmental issues is crucial for textile engineering due to increasing consumption of textile fibres. In addition, levels of pollution are ever increasing due to single use polymeric packaging materials in our daily life. Single use polymeric packaging materials, such as PET beverage bottles, have impacts on the consumption of raw materials and energy, on the contamination of our water and atmosphere, on human health, on global climate change. In this point of view, the ability of the textile producers to recycle the disposed PET beverage bottles into textile products has a critical importance. In this study, performance properties of knitted fabrics produced from rPET and cotton/rPET blended vortex and ring yarns are investigated to figure out the reproducibility of environmentally friendly textile products. For this aim, 100% rPET, 50-50% rPET-Co and 50-50% VPET-Co yarns were produced by Vortex and Ring Spinning technologies with same yarn number as Ne 30/1. Then the knitted fabric samples were produced from these sample yarns and the fabrics were dyed. Dimensional stability, bursting strength and pilling resistance properties of the fabrics were examined. Dimensional stability properties of rPET used fabrics were found to be similar with the ones which VPET used. Pilling resistance and bursting strength of the sample fabrics were close to each other that rPET usage does not demonstrate any disadvantage. Consequently, rPET fibre usage instead of VPET fibre is found to be appropriate.
{"title":"PERFORMANCE PROPERTIES OF KNITTED FABRICS\u0000PRODUCED FROM rPET AND COTTON/rPET BLENDED VORTEX\u0000AND RING YARNS","authors":"A. Oruç, Y. Arıkan, E. İlanbey, K. Özşahin","doi":"10.35530/tt.2021.32","DOIUrl":"https://doi.org/10.35530/tt.2021.32","url":null,"abstract":"An awareness of environmental issues is crucial for textile engineering due to increasing\u0000consumption of textile fibres. In addition, levels of pollution are ever increasing due to single use polymeric\u0000packaging materials in our daily life. Single use polymeric packaging materials, such as PET beverage bottles,\u0000have impacts on the consumption of raw materials and energy, on the contamination of our water and\u0000atmosphere, on human health, on global climate change. In this point of view, the ability of the textile\u0000producers to recycle the disposed PET beverage bottles into textile products has a critical importance. In this\u0000study, performance properties of knitted fabrics produced from rPET and cotton/rPET blended vortex and ring\u0000yarns are investigated to figure out the reproducibility of environmentally friendly textile products. For this\u0000aim, 100% rPET, 50-50% rPET-Co and 50-50% VPET-Co yarns were produced by Vortex and Ring Spinning\u0000technologies with same yarn number as Ne 30/1. Then the knitted fabric samples were produced from these\u0000sample yarns and the fabrics were dyed. Dimensional stability, bursting strength and pilling resistance\u0000properties of the fabrics were examined. Dimensional stability properties of rPET used fabrics were found to\u0000be similar with the ones which VPET used. Pilling resistance and bursting strength of the sample fabrics were\u0000close to each other that rPET usage does not demonstrate any disadvantage. Consequently, rPET fibre usage\u0000instead of VPET fibre is found to be appropriate.","PeriodicalId":22214,"journal":{"name":"TEXTEH Proceedings","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82856093","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. Avadanei, A. Matasel, I. Ionescu, E. Loghin, D. Ionesi
We use IT applications to solve various problems, such as buying various things, communication or professional matters. Everything seems to be solved faster when we shop on online platforms (virtual stores) because we can analyse several offers, see the best deals and then decide which one suits our purpose. Sometimes the items bought online are returned for the following reasons: they do not look as they were presented on the website; these items have functional problems or do not fit (this is the situation with clothing and footwear products). Usually, the fit problems occur because the customer did not choose the right size, the model does not have a size range that fits the customer, or the customer has a particular body shape. The return rate (fit problem) can decrease if the customer can virtually try on the selected model during the purchase process to check how it looks on their body. Assuming that customers also have the option to personalise the product according to their body shape or desires, their satisfaction increases. In this case, the number of returned or unsold products is reduced, and a dynamic and positive advertising campaign for the brand can be carried out (based on customer reviews). This paper proposes an integrated solution for online marketing of customised clothing products (website for medium or small companies), using a virtual test room that simulates the product on the virtual mannequin in different positions (360°).
{"title":"AN INTEGRATED SOLUTION FOR THE ONLINE MARKETING OF\u0000CUSTOM-MADE GARMENTS THAT INCORPORATES A VIRTUAL\u0000FITTING ROOM","authors":"M. Avadanei, A. Matasel, I. Ionescu, E. Loghin, D. Ionesi","doi":"10.35530/tt.2021.48","DOIUrl":"https://doi.org/10.35530/tt.2021.48","url":null,"abstract":"We use IT applications to solve various problems, such as buying various things, communication or\u0000professional matters. Everything seems to be solved faster when we shop on online platforms (virtual stores)\u0000because we can analyse several offers, see the best deals and then decide which one suits our purpose.\u0000Sometimes the items bought online are returned for the following reasons: they do not look as they were\u0000presented on the website; these items have functional problems or do not fit (this is the situation with clothing\u0000and footwear products). Usually, the fit problems occur because the customer did not choose the right size, the\u0000model does not have a size range that fits the customer, or the customer has a particular body shape. The\u0000return rate (fit problem) can decrease if the customer can virtually try on the selected model during the\u0000purchase process to check how it looks on their body. Assuming that customers also have the option to\u0000personalise the product according to their body shape or desires, their satisfaction increases. In this case, the\u0000number of returned or unsold products is reduced, and a dynamic and positive advertising campaign for the\u0000brand can be carried out (based on customer reviews). This paper proposes an integrated solution for online\u0000marketing of customised clothing products (website for medium or small companies), using a virtual test room\u0000that simulates the product on the virtual mannequin in different positions (360°).","PeriodicalId":22214,"journal":{"name":"TEXTEH Proceedings","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90790484","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}
This work presents the general aspects concerning the accessibility and usability of the learning tools existent for smart materials development using eco-design in the context of the circular economy. These learning tools will be used in part and some of them developed in the framework of the Erasmus+ project DigiTEX and will cover also the aspects of digital learning technologies capable to accelerate innovation in the field of healthcare and protective systems based on electroconductive materials. In DigiTEX Erasmus+ project will be developed solution-based software technologies, database development and creative methods for coaching the innovative ideas from design, development and production management in the context of circular economy and sustainable development with reduced environmental impact. This paper is structured in 5 sections such as introduction, smart materials overview, eco-design for smart materials, circular economy approach and conclusions.
{"title":"ACCESSIBILITY AND USABILITY OF THE LEARNING TOOLS TO\u0000ACCELERATE INNOVATION IN THE FIELD OF SMART\u0000MATERIALS DEVELOPMENT","authors":"R. Aileni, L. Chiriac","doi":"10.35530/tt.2021.44","DOIUrl":"https://doi.org/10.35530/tt.2021.44","url":null,"abstract":"This work presents the general aspects concerning the accessibility and usability of the learning\u0000tools existent for smart materials development using eco-design in the context of the circular economy. These\u0000learning tools will be used in part and some of them developed in the framework of the Erasmus+ project\u0000DigiTEX and will cover also the aspects of digital learning technologies capable to accelerate innovation in\u0000the field of healthcare and protective systems based on electroconductive materials. In DigiTEX Erasmus+\u0000project will be developed solution-based software technologies, database development and creative methods\u0000for coaching the innovative ideas from design, development and production management in the context of\u0000circular economy and sustainable development with reduced environmental impact. This paper is structured in\u00005 sections such as introduction, smart materials overview, eco-design for smart materials, circular economy\u0000approach and conclusions.","PeriodicalId":22214,"journal":{"name":"TEXTEH Proceedings","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77096683","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}
High performance fire retardant textiles are utilized in different end-use areas such as workwear, firefighter garments, military textiles etc. These textiles are produced to protect the wearer against harsh environmental/occupational hazards and to bear forces during occupation. In the literature, fire-retardancy and mechanical performance of high performance fire retardant textiles are searched in details. Nevertheless, in most of these studies, samples were in the form of fibres or fabrics. When the fabrics are cut and sewn together to form a textile article, their mechanical properties change along the seam lines. In spite of this fact, seam properties of high performance fire retardant fabrics were not studied in the literature, systematically. Therefore, in this study, some seam properties of high performance fire retardant fabrics were studied as a preliminary work in this subject. According to results, seam strength of all samples were considerably lower when compared to strength of non-sewn reference samples. Strength differences were detected between the samples sewn with meta–aramid sewing yarn and para-aramid sewing yarn. Seam elongation and seam slippage values were similar for both sewing yarn types.
{"title":"EFFECTS OF ARAMID SEWING YARN TYPE AND FABRIC\u0000COMPOSITIONS ON SOME SEAM PROPERTIES OF HIGH\u0000PERFORMANCE FIRE RETARDANT FABRICS","authors":"Sukran KARA","doi":"10.35530/tt.2021.16","DOIUrl":"https://doi.org/10.35530/tt.2021.16","url":null,"abstract":"High performance fire retardant textiles are utilized in different end-use areas such as workwear,\u0000firefighter garments, military textiles etc. These textiles are produced to protect the wearer against harsh\u0000environmental/occupational hazards and to bear forces during occupation. In the literature, fire-retardancy and\u0000mechanical performance of high performance fire retardant textiles are searched in details. Nevertheless, in\u0000most of these studies, samples were in the form of fibres or fabrics. When the fabrics are cut and sewn together\u0000to form a textile article, their mechanical properties change along the seam lines. In spite of this fact, seam\u0000properties of high performance fire retardant fabrics were not studied in the literature, systematically.\u0000Therefore, in this study, some seam properties of high performance fire retardant fabrics were studied as a\u0000preliminary work in this subject. According to results, seam strength of all samples were considerably lower\u0000when compared to strength of non-sewn reference samples. Strength differences were detected between the\u0000samples sewn with meta–aramid sewing yarn and para-aramid sewing yarn. Seam elongation and seam slippage\u0000values were similar for both sewing yarn types.","PeriodicalId":22214,"journal":{"name":"TEXTEH Proceedings","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76814235","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}
In this study, it was investigated experimentally the influence of various solvents (distilled water and ethanol) on the solution properties, spinning performance, and fibre morphology of the electro spun Poly (acrylic acid) nanofibers. Firstly, polymer solutions were prepared at 5 wt % PAA with various solvent ratios of ethanol and distilled water. Then, solution properties such as viscosity, density, pH, conductivity, and surface tension were determined. The production of nanofiber samples was carried out by electrospinning under the optimum process parameters (voltage, distance between electrodes, feed rate, and atmospheric conditions). Finally, the morphological characterization of the nanofiber surface was carried out with SEM. According to the results, it was observed that conductivity, surface tension and the density of the solution increase as the ethanol ratio decreases. On the other hand, pH value increases as the ethanol ratio increases and, so, the acidic value of the solutions decreases. The viscosity increased until the ethanol/distilled water ratio was 50/50 and then decreased as the ethanol percentage decreased to under 50%. In addition, average fibre diameter decreases with ethanol ratio decreases. It is possible to say that solvent type affects solution properties, fibre morphology and spinning performance significantly. Generally, fine, uniform and bead free nanofibers could be electro spun and the PAA solution containing 70 wt % distilled water and 30 wt % ethanol was selected as the optimum in terms of fibre morphology, web quality and spinning performance.
{"title":"SOLVENT OPTIMIZATION OF ELECTROSPUN\u0000POLY(ACRYLIC ACID) NANOFIBERS","authors":"M. Geysoğlu, F. C. Çallıoğlu","doi":"10.35530/tt.2021.27","DOIUrl":"https://doi.org/10.35530/tt.2021.27","url":null,"abstract":"In this study, it was investigated experimentally the influence of various solvents (distilled water and\u0000ethanol) on the solution properties, spinning performance, and fibre morphology of the electro spun Poly\u0000(acrylic acid) nanofibers. Firstly, polymer solutions were prepared at 5 wt % PAA with various solvent ratios of\u0000ethanol and distilled water. Then, solution properties such as viscosity, density, pH, conductivity, and surface\u0000tension were determined. The production of nanofiber samples was carried out by electrospinning under the\u0000optimum process parameters (voltage, distance between electrodes, feed rate, and atmospheric conditions).\u0000Finally, the morphological characterization of the nanofiber surface was carried out with SEM. According to the\u0000results, it was observed that conductivity, surface tension and the density of the solution increase as the ethanol\u0000ratio decreases. On the other hand, pH value increases as the ethanol ratio increases and, so, the acidic value of\u0000the solutions decreases. The viscosity increased until the ethanol/distilled water ratio was 50/50 and then\u0000decreased as the ethanol percentage decreased to under 50%. In addition, average fibre diameter decreases\u0000with ethanol ratio decreases. It is possible to say that solvent type affects solution properties, fibre morphology\u0000and spinning performance significantly. Generally, fine, uniform and bead free nanofibers could be electro spun\u0000and the PAA solution containing 70 wt % distilled water and 30 wt % ethanol was selected as the optimum in\u0000terms of fibre morphology, web quality and spinning performance.","PeriodicalId":22214,"journal":{"name":"TEXTEH Proceedings","volume":"66 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81017381","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}
Storage of recovered oil and oily water is an important issue when it comes to maritime disasters, being a significant factor of the overall operation. Using large storage vessels is not always an option especially when the vessel is close to the shore. Currently, floating or non-inflatable tanks made of composite textile materials are used worldwide for the storage of the water/hydrocarbon mixture, regardless of the area of action (maritime or fluvial). The research carried out so far by INCDTP specialists, which consists in modelling, simulation and numerical analysis of various constructive forms and devices, led to the conclusion that for the making of a floating tank for storing water/hydrocarbon/oil mixtures, the best solution for its construction is represented by textile materials woven from high-tech yarns (p-aramid and polyamide 6.6) covered with polyurethane. The experimental model of the floating tank for the transport of oils and hydrocarbons in case of disaster was designed by INCDTP specialists and consists of five experimental models of floating materials (made of five variants of covered textile structures) and assembled in collaboration with specialists from SC CONDOR SA, in the form of a floating storage tank. The storage tank that has been created will be tested on the ground first, in order to perform all gravimetric and quality measurements
{"title":"FLOATING TANK FOR TRANSPORTING\u0000OIL AND HYDROCARBONS FOLLOWING A MARITIME DISASTER","authors":"M. Jomir, D. Zamfirache, A. Ene, C. Mihai","doi":"10.35530/tt.2021.06","DOIUrl":"https://doi.org/10.35530/tt.2021.06","url":null,"abstract":"Storage of recovered oil and oily water is an important issue when it comes to maritime disasters,\u0000being a significant factor of the overall operation. Using large storage vessels is not always an option\u0000especially when the vessel is close to the shore. Currently, floating or non-inflatable tanks made of\u0000composite textile materials are used worldwide for the storage of the water/hydrocarbon mixture,\u0000regardless of the area of action (maritime or fluvial). The research carried out so far by INCDTP\u0000specialists, which consists in modelling, simulation and numerical analysis of various constructive forms and\u0000devices, led to the conclusion that for the making of a floating tank for storing water/hydrocarbon/oil mixtures,\u0000the best solution for its construction is represented by textile materials woven from high-tech yarns (p-aramid\u0000and polyamide 6.6) covered with polyurethane. The experimental model of the floating tank for the\u0000transport of oils and hydrocarbons in case of disaster was designed by INCDTP specialists and consists\u0000of five experimental models of floating materials (made of five variants of covered textile structures) and\u0000assembled in collaboration with specialists from SC CONDOR SA, in the form of a floating storage tank.\u0000The storage tank that has been created will be tested on the ground first, in order to perform all gravimetric\u0000and quality measurements","PeriodicalId":22214,"journal":{"name":"TEXTEH Proceedings","volume":"267 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78425232","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}
Although the textile industry has many products to offer to humanity, it consumes a lot of energy and indirectly causes greenhouse gas emissions. With increasing environmental awareness, parameters such as the cost and performance of each industrial activity to society, as well as the use of natural resources and the possibility of causing global environmental problems to have become more frequently considered factors. In the denim bleaching process, the desired effect is usually obtained with the help of sodium hypochlorite. Sodium metabisulfite is then used for the neutralization process. Since these processes are carried out at high liquor ratios, the waste load resulting from the consumption of necessary chemicals and water is also high. In this study, ecological bleaching methods have been developed as an alternative to the conventional sodium hypochlorite bleaching method by reducing the use of water and chemicals with low liquor and spraying bleaching methods. Denim garments subjected to bleaching with low liquor and spraying methods were compared with denim garments applied to sodium hypochlorite bleaching in industrial washing machines according to exhaustion method. In the spraying method, the mixture coming out of the narrow nozzle is mixed with the compressed air by means of a specially designed spray gun and sprayed in very small droplets. Thus, a good atomization is ensured, and a low liquor ratio water cloud is created.
{"title":"DEVELOPMENT OF ECOLOGICAL DENIM BLEACHING\u0000METHODS","authors":"İ. İvedi, K. Yagci, E. Tağaç","doi":"10.35530/tt.202.07","DOIUrl":"https://doi.org/10.35530/tt.202.07","url":null,"abstract":"Although the textile industry has many products to offer to humanity, it consumes a lot of energy and indirectly causes greenhouse gas emissions. With increasing environmental awareness, parameters such as the cost and performance of each industrial activity to society, as well as the use of natural resources and the possibility of causing global environmental problems to have become more frequently considered factors. In the denim bleaching process, the desired effect is usually obtained with the help of sodium hypochlorite. Sodium metabisulfite is then used for the neutralization process. Since these processes are carried out at high liquor ratios, the waste load resulting from the consumption of necessary chemicals and water is also high. In this study, ecological bleaching methods have been developed as an alternative to the conventional sodium hypochlorite bleaching method by reducing the use of water and chemicals with low liquor and spraying bleaching methods. Denim garments subjected to bleaching with low liquor and spraying methods were compared with denim garments applied to sodium hypochlorite bleaching in industrial washing machines according to exhaustion method. In the spraying method, the mixture coming out of the narrow nozzle is mixed with the compressed air by means of a specially designed spray gun and sprayed in very small droplets. Thus, a good atomization is ensured, and a low liquor ratio water cloud is created.","PeriodicalId":22214,"journal":{"name":"TEXTEH Proceedings","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88848691","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}
Composites are materials formed by the combination of two or more components that acquire better properties than the ones obtained by each component on its own. Composites have been widely used in the industry due to its light weight and good mechanical properties. To improve these properties several layers of reinforced material (e.g., carbon fibre) are overlapped which produce an increase in the fibre consumption. In this sense Tailored Fibre Placement (TFP) embroidery can offer good opportunity to reduce the consumption of reinforced fibre while improving the mechanical properties due to the alignment of the fibres in the effort direction. This study analyzes the performance of carbon fibre reinforced composites with Polyester resin made with TFP embroidery technology against flexural strength efforts and without using plain woven fabrics to demonstrate that the use of reinforcement fabrics in composites can be optimized by a curved alignment of the fibers. Two different structures were embroidered with TFP technology, one simulating a woven fabric with straight unidirectional alignment of fibres in horizontal and vertical direction, and a second structure made with curvilinear alignment of carbon fibers. After the study of the flexural mechanical properties an improvement of 18% was obtained in maximum flexural strength.
{"title":"CARBON FIBRE ALIGNMENT FOR REINFORCED COMPOSITES\u0000USING EMBROIDERY TECHNOLOGY","authors":"J. DOMENECH-PASTOR, P. Díaz-García, D. Garcia","doi":"10.35530/tt.2021.14","DOIUrl":"https://doi.org/10.35530/tt.2021.14","url":null,"abstract":"Composites are materials formed by the combination of two or more components that acquire better\u0000properties than the ones obtained by each component on its own. Composites have been widely used in the\u0000industry due to its light weight and good mechanical properties. To improve these properties several layers of\u0000reinforced material (e.g., carbon fibre) are overlapped which produce an increase in the fibre consumption. In\u0000this sense Tailored Fibre Placement (TFP) embroidery can offer good opportunity to reduce the consumption\u0000of reinforced fibre while improving the mechanical properties due to the alignment of the fibres in the effort\u0000direction. This study analyzes the performance of carbon fibre reinforced composites with Polyester resin\u0000made with TFP embroidery technology against flexural strength efforts and without using plain woven fabrics\u0000to demonstrate that the use of reinforcement fabrics in composites can be optimized by a curved alignment of\u0000the fibers. Two different structures were embroidered with TFP technology, one simulating a woven fabric\u0000with straight unidirectional alignment of fibres in horizontal and vertical direction, and a second structure\u0000made with curvilinear alignment of carbon fibers. After the study of the flexural mechanical properties an\u0000improvement of 18% was obtained in maximum flexural strength.","PeriodicalId":22214,"journal":{"name":"TEXTEH Proceedings","volume":"183 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81814919","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}
The hydrodynamic and flocculation properties of aqueous solution of chitosan (CS) were investigated at room temperature. The viscometric data of dilute CS solutions were discussed in terms of Wolf method as a function of polymer concentration, salt nature (NaCl, NaNO3, and CaCl2) and concentration. The flocculation properties in emulsions of some commercial pyrethroid insecticides (Fastac 10 EC (F), Decis (Dc) and Karate Zeon (KZ)) were evaluated. The viscosity measurements reveal that the experimental data fit well with the Wolf model and the [η] values decrease in salt aqueous solutions. For the same insecticide concentration (0.02%, v/v), UV-Vis spectroscopy measurements show maximum removal efficiency around 90% for Fastac 10EC and Decis and 80% for Karate Zeon. The residual KZ absorbance decreased with the increase of insecticide concentration in the initial emulsion, from 80% for the lowest concentration (0.02%, v/v) to around 90% for the highest one (0.06%, v/v). The supernatant zeta potential dependence on the chitosan dose pleads for the charge neutralization as the main mechanism for the flocculation of pyrethroid insecticide particles.
{"title":"AQUEOUS SOLUTIONS OF CHITOSAN: VISCOMETRIC AND\u0000FLOCCULATION PROPERTIES","authors":"Cristina-Eliza Brunchi, L. Ghimici","doi":"10.35530/tt.2021.21","DOIUrl":"https://doi.org/10.35530/tt.2021.21","url":null,"abstract":"The hydrodynamic and flocculation properties of aqueous solution of chitosan (CS) were investigated\u0000at room temperature. The viscometric data of dilute CS solutions were discussed in terms of Wolf method as a\u0000function of polymer concentration, salt nature (NaCl, NaNO3, and CaCl2) and concentration. The flocculation\u0000properties in emulsions of some commercial pyrethroid insecticides (Fastac 10 EC (F), Decis (Dc) and Karate\u0000Zeon (KZ)) were evaluated. The viscosity measurements reveal that the experimental data fit well with the Wolf\u0000model and the [η] values decrease in salt aqueous solutions. For the same insecticide concentration (0.02%,\u0000v/v), UV-Vis spectroscopy measurements show maximum removal efficiency around 90% for Fastac 10EC and\u0000Decis and 80% for Karate Zeon. The residual KZ absorbance decreased with the increase of insecticide\u0000concentration in the initial emulsion, from 80% for the lowest concentration (0.02%, v/v) to around 90% for the\u0000highest one (0.06%, v/v). The supernatant zeta potential dependence on the chitosan dose pleads for the charge\u0000neutralization as the main mechanism for the flocculation of pyrethroid insecticide particles.","PeriodicalId":22214,"journal":{"name":"TEXTEH Proceedings","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78068778","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}
A. Tigău, G. Vasile, L. Chirilă, A. Popescu, S. Olaru
Every year, millions of peoples are affected by skin injuries of either an acute or chronic nature. Worldwide 300,000 people die every year in lower-middle-income countries due to chronic wounds and burn injuries. Wounds are described as the disruption in the skin integrity and function, which arises from different causes such as trauma, surgery, diabetes, and burns. Skin provides a mechanical barrier against the external environment and has further roles in thermoregulation, metabolism and regulation of fluid balance. Skin diseases can affect each of these regions and they can be influenced by body size, sex, age, medications, diet, and microenvironment. Also, they can manifest whether the skin is healthy or diseased. Wound dressings are critical to wound care, providing a physical barrier between the wound and the external environment to prevent further damage or infection. The most promising wound dressings are biocompatible, enable physical protection of the wound milieu against penetration of bacteria and are highly porous. The use of natural biocompatible drugs is highly desirable in wound dressing compared to synthetic chemicals. To achieve an adequate therapeutic effect, different polymeric systems are used for drug delivery. To improve drug efficacy, safety, patient compliance and convenience a drug delivery system is modified to enhance drug release profile, absorption, distribution and elimination of the drug. The present review is an attempt to brief readers about the engineering of wound dressing materials from natural and synthetic sources upfront using active principles, such as bee products, drugs, essential oils, metallic nanoparticles and vitamins.
{"title":"ACTIVE PRINCIPLES APPLIED ON BIOMATERIALS FOR THE\u0000CURATIVE THERAPY OF INFLAMMATORY SKIN DISEASES - A\u0000REVIEW","authors":"A. Tigău, G. Vasile, L. Chirilă, A. Popescu, S. Olaru","doi":"10.35530/tt.2021.04","DOIUrl":"https://doi.org/10.35530/tt.2021.04","url":null,"abstract":"Every year, millions of peoples are affected by skin injuries of either an acute or chronic nature.\u0000Worldwide 300,000 people die every year in lower-middle-income countries due to chronic wounds and burn\u0000injuries. Wounds are described as the disruption in the skin integrity and function, which arises from different\u0000causes such as trauma, surgery, diabetes, and burns. Skin provides a mechanical barrier against the external\u0000environment and has further roles in thermoregulation, metabolism and regulation of fluid balance. Skin\u0000diseases can affect each of these regions and they can be influenced by body size, sex, age, medications, diet,\u0000and microenvironment. Also, they can manifest whether the skin is healthy or diseased. Wound dressings are\u0000critical to wound care, providing a physical barrier between the wound and the external environment to\u0000prevent further damage or infection. The most promising wound dressings are biocompatible, enable physical\u0000protection of the wound milieu against penetration of bacteria and are highly porous. The use of natural\u0000biocompatible drugs is highly desirable in wound dressing compared to synthetic chemicals. To achieve an\u0000adequate therapeutic effect, different polymeric systems are used for drug delivery. To improve drug efficacy,\u0000safety, patient compliance and convenience a drug delivery system is modified to enhance drug release profile,\u0000absorption, distribution and elimination of the drug. The present review is an attempt to brief readers about\u0000the engineering of wound dressing materials from natural and synthetic sources upfront using active\u0000principles, such as bee products, drugs, essential oils, metallic nanoparticles and vitamins.","PeriodicalId":22214,"journal":{"name":"TEXTEH Proceedings","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84186186","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：