Soybean: For Textile Applications and Its Printing

It is vital to colorize sustainable, renewable, ecologic natural-based soybean fiber properly via printing for the textile and fashion industry. Optimum steaming-fixation conditions in respect of colorimetric values and color fastness properties should be determined for dye class in order to obtain the best possible print quality on soybean fiber fabric. This study exhibits that acid and 1:2 metal-complex dyes (originally used for printing of natural protein fibers such as wool and silk) and special reactive dyes (used for wool and polyamide fibers printing) can be used for regenerated soybean fiber printing leading to high color strength with adequate color fastness performance. Steaming at 102°C for 40 and 45 minutes are the optimum fixation conditions for acid and 1:2 metal-complex dyes on soybean fiber fabrics, respectively. On the other hand, steamings at 102°C for 20 minutes and 30 minutes are the optimum fixation conditions for wool-type reactive dyes and polyamide-type reactive dyes on soybean fiber fabrics, respectively. These optimum steam-fixation durations for each dye class led to the highest light fastness levels. Optimum steam fixation durations for 1:2 metal-complex and reactive dye classes (for both wool and polyamide) on printed soybean fibers displayed quite high and commercially acceptable wash fastness and good and commercially acceptable dry rub fastness and moderate to good wet rub fastness levels performance

Effects of different production processing stages on mechanical and surface characteristics of polylactic acid and PET fibre fabrics

This paper reports study on the polylactic acid (PLA) and polyester (PET) knitted fabrics mechanical and surface characteristics at low-stress and the influence of typical commercially applied different production processing stages on the properties. The KES-FB is used for the investigation of low-stress bending, compression, tensile, shear and surface characteristics. The results show remarkable changes after each processing stage, such as scouring, drying, dyeing, heat setting and softening, in mechanical and surface characteristics of PLA and PET fibre knitted fabrics. PLA knitted fabrics represent higher values in bending, shear and surface properties after different processing stages as compared to PET knitted fabrics. The values of bending rigidity (B), bending hysteresis (2HB), shear stiffness (G), and shear hysteresis (2HG and 2HG3) have been significantly decreased after the scouring treatment. There is a considerable decrease in B, 2HB, G, 2HG and 2HG3 values and an improvement in tensile elongation (EMT) after dyeing of PET and PLA fabrics. A slight reduction in shear and bending properties of polylactic acid fibre fabrics shows that softening treatment decreases the inter fibre and inter yarn friction. LT (linearity of load-extension curve), RT (recovery from tensile deformation), LC (linearity of compression curve) and RC (recovery from compression deformation) properties are not found quite sensitive for different production processing stages in case of both the fabrics

Treatment of cotton with a laccase enzyme and ultrasound

In this study, the effects of ultrasound on the enzymatic treatment of cotton fabrics with laccase were investigated. The laccase enzyme treatment of cotton fabric samples was carried out with the support of an ultrasonic homogeniser (UH) and an ultrasonic bath (UB). Optimum enzyme concentration, application time, and enzyme application temperature conditions were first determined. The ultrasound-supported treatments were performed with the obtained optimum conditions. Whiteness, yellowness, weight loss, fabric thickness, tensile strength, Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) analysis, as well as COD measurement of the process effluents, were carried out. The whiteness of the cotton fabric slightly increased after the laccase enzyme treatment. The effect of the enzyme was intensified with the help of ultrasonic energy leading to up to a 9.2% whiteness improvement. Results indicated that the laccase enzyme treatment processes had no significant degradative damage or effect and/or did not lead to any drastic detrimental change to the surface morphology of the cotton fibre

Effects of different production processing stages on mechanical and surface characteristics of polylactic acid and PET fibre fabrics

31-37This paper reports study on the polylactic acid (PLA) and polyester (PET) knitted fabrics mechanical and surface characteristics at low-stress and the influence of typical commercially applied different production processing stages on the properties. The KES-FB is used for the investigation of low-stress bending, compression, tensile, shear and surface characteristics. The results show remarkable changes after each processing stage, such as scouring, drying, dyeing, heat setting and softening, in mechanical and surface characteristics of PLA and PET fibre knitted fabrics. PLA knitted fabrics represent higher values in bending, shear and surface properties after different processing stages as compared to PET knitted fabrics. The values of bending rigidity (B), bending hysteresis (2HB), shear stiffness (G), and shear hysteresis (2HG and 2HG3) have been significantly decreased after the scouring treatment. There is a considerable decrease in B, 2HB, G, 2HG and 2HG3 values and an improvement in tensile elongation (EMT) after dyeing of PET and PLA fabrics. A slight reduction in shear and bending properties of polylactic acid fibre fabricsshows that softening treatment decreases the inter fibre and inter yarn friction. LT (linearity of load-extension curve), RT (recovery from tensile deformation), LC (linearity of compression curve) and RC (recovery from compression deformation) properties are not found quite sensitive for different production processing stages in case of both the fabrics

You can control mold [Vietnamese]

You can control mold [Vietnamese]N\ue2\u301m m\uf4\u301c co\u301 th\uea\u309 co\u301 nhi\uea\u300u a\u309nh hu\u31b\u1a1\u309ng \u111\uea\u301n s\u1b0\u301c kho\u309e. V\u1a1\u301i m\u1ecd\u302t s\uf4\u301 ngu\u31b\u1a1\u300i, n\ue2\u301m m\uf4\u301c co\u301 th\uea\u309 ga\u302y ra nghe\u323t mu\u303i, \u111au ho\u323ng, ho ho\u1ea1\u306c th\u1a1\u309 kho\u300 khe\u300, cay m\u103\u301t ho\u1ea1\u306c pha\u301t ban ngoa\u300i da. Nh\u1b0\u303ng ngu\u31b\u1a1\u300i bi\u323 hen suy\uea\u303n ho\u1ea1\u306c di\u323 \u1b0\u301ng v\u1a1\u301i n\ue2\u301m m\uf4\u301c co\u301 th\uea\u309 co\u301 pha\u309n \u1b0\u301ng nghie\u302m tro\u323ng. Nh\u1b0\u303ng ngu\u31b\u1a1\u300i co\u301 h\u1eb9\u302 mi\uea\u303n di\u323ch suy gia\u309m ho\u1ea1\u306c bi\u323 b\u1eb9\u302nh ph\uf4\u309i ma\u323n ti\u301nh co\u301 th\uea\u309 bi\u323 la\u302y nhi\uea\u303m trong ph\uf4\u309i t\u1b0\u300 n\ue2\u301m m\uf4\u301c.CS254313Publication date from document properties.Mold_Factsheet_vi_508.pdf201

Poly (Lactic Acid) Nano-fibers as Drug-delivery Systems: Opportunities and challenges

Numerous Scientists have discovered the procedure of nano-technology, explicitly nano-fibers, as drug-delivery systems for trans-dermal uses. Nano-fibers can be used to deliver drugs and are capable of controlled-release for a continued period of time. Poly (Lactic Acid) (PLA) is the lastly interesting employed synthetic polymer in bio-medical usage owing to its well categorized biodegradable properties. PLA (−[CH(CH3)COO]n–)is linear biodegradable aliphatic polyester which can be derived from 100% re-newable bio-resources like rice and wheat through fermentation and polymerization. PLA has been accepted by FDA to be applied in bio-materials, for instance sutures, bone plates, abdominal mesh, and drug-delivery systems. PLA holds stereo-isomers, for instance Poly (L-Lactide) (PLLA), Poly(D-Lactide) (PDLA), and Poly(DL-Lactide) (PDLLA). PLGA is a co-polymer of PLA and Poly (Glycolic Acid) (PGA) that are most usually used biodegradable synthetic polymers for bio-medical uses for instance scaffolds and drug-delivery systems. The objective of this review paper is to highpoint the possibility of PLA nano-fibres as drug-delivery substances and to give full information about the new progresses about the PLA, PLLA and PLGA nano-fibers fabrication as novel drug-delivery systems. © 2019 Tehran University of Medical Sciences. All rights reserved

Nano-Fibrous and Tubular Poly (lactic acid) Scaffolds for Vascular Tissue Engineering

In recent years, the adaptation of tissue engineering techniques is necessary to progress the field of cardio-vascular bio-logy and advancing patient care. Through the high event of cardio-vascular disease and increasing amount of patients needing vascular admission, there is a considerable require for small-diameter (<6mm inner diameter) vascular graft that can supply long-period patency. Vascular tissue engineering is a novel field that has undergone massive growth more than the final decade and has suggested suitable keys for blood-vessels darn. The objective of vascular tissue engineering is to manufacture neovessels and neo-organ tissue from autologous cells by means of a bio-degradable polymer like Poly (lactic acid) (PLA) as a scaffold. PLA Nano-fibrous scaffolds have high surface area–to-volume ratios and porosity that simulate the structure of protein fibers in native extra cellular matrix (ECM). The versatilities of polymer components, fiber structures, and functionalization have made the fabrication of PLA Nano-fibrous scaffolds with suitable mechanical strength, transparency and biological properties for vascular tissue engineering feasible. The most significant benefit of tissue engineered implants is that these tissues can grow, remodel, rebuild, and respond to damage. This review explains the fabrication, properties and advantages of different types of PLA scaffolds with emphasis on Nano-fibrous ones for vascular tissue engineering. © Nanomedicine Research Journal. All rights reserved

Investigation of the influence of different commercial softeners on the stability of poly(lactic acid) fabrics during storage

We have studied the potential degradation of poly(lactic acid)-based fabrics treated with commercial softeners and stored under two sets of conditions for one year. Initial wet-processing caused a fall in molecular weight of about 28%, irrespective of after-treatment. Storage at 40 degrees C and 80% RH produced further degradation which, with few exceptions, was aggravated by the presence of softeners. Ultimately, all samples degraded beyond the point of commercial usefulness. No clear distinction could be made between the effects of softeners having differing compositions. In contrast, fabrics stored under milder conditions of 23 degrees C and 50% RH showed no significant time-dependent polymer degradation, irrespective of the treatment applied. There were slight changes in tensile properties and some evidence of physical structural effects having occurred, which we attribute to physical aging. However, we do not believe these to be so serious as to call into question the long-term viability of PLA-based textile products. (C) 2009 Elsevier Ltd. All rights reserved

Effects of softeners and laundering on the handle of knitted PLA filament fabrics

We have studied the effects of softeners and repeated laundering on the handle of knitted fabrics constructed from poly(lactic acid) (PLA) filament yarns derived from corn-starch. The fabrics were assessed: a) subjectively, via a panel of volunteers, in terms of their perceived softness and 'scroopiness'; and b) objectively, using a Kawabata Evaluation System for Fabrics (KES-F), in terms of their low-stress mechanical properties. The study employed two fabric variants and a range of commercial softeners in an attempt to determine the combination that would provide optimal handle and durability to laundering. We found the standard KES-F parameters B, 2HB, G, 2HG, and SMD to be generally well-correlated with the subjective assessment of softness and scroopiness. Although repeated laundering reduced somewhat the beneficial effects of the softeners, this deterioration was not severe, and we were able to identify specific formulations that can provide good handle coupled with acceptable durability. The fabric handle was seen to be influenced by the chemical nature of the softening agent, the type of emulsion employed and the degree of hydrophobicity (assessed in terms of wettability); on the other hand, the ionicity of the softener appeared not to play a significant role