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RISS 인기검색어
- 검색키워드
- 저자 : Rattanaphol Mongkholrattanasit (검색결과 3 건)
- 무료
- 기관 내 무료
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Azoic Deep Dyeing of Silk and UV Protection Using Plant Polyphenols and Diazonium Coupling
Nattaya Vuthiganond,Monthon Nakpathom,Rattanaphol Mongkholrattanasit 한국섬유공학회 2020 Fibers and polymers Vol.21 No.5
This study investigated azoic dyeing as an approach to improving the natural dyeability of silk fabric whileavoiding the use of metallic mordants, which are toxic to health and the environment. An aryl diazonium salt was preparedfrom p-nitroaniline and used to couple with silk fabric pretreated with plant polyphenols. The interaction triggered in situproduction of azo dye within the silk fibers. This dyeing approach was demonstrated to overcome the poor tinctorial strengthand fastness of natural dyes. Plant polyphenols were extracted from oolong tea and mangrove bark. The CIE L*a*b* and K/Svalues were measured, and compared with the results of post-mordant dyeing using aluminum potassium sulfate. Even at lowconcentrations, aryl diazonium salt was shown to achieve deep dyeing, producing an intense brown/orange shade. The effectof azoic dyeing on color strength was strongly dependent on the primary aromatic amine concentration. At 7 % owf, theoolong tea extract produced a K/S value approximately six times that of the comparable post-mordant sample, and themangrove bark extract approximately three times. The grater color strength achieved by the tea extract was due to the higherTPC concentration. The natural extracts conferred UV protection greater than 50 in all dyeing processes.
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Metal-free Dyeing of Cotton Fabric Using Mangrove Bark Polyphenols via Azoic Dyeing
Nattaya Vuthiganond,Monthon Nakpathom,Rattanaphol Mongkholrattanasit 한국섬유공학회 2018 Fibers and polymers Vol.19 No.12
This study proposed a novel azoic dyeing method, in which mangrove bark extract was used as the colorant. This approach eliminates the use of toxic metallic mordants. Polyphenols from mangrove bark were selected as the natural coupling component. These were applied to cotton fabric using an exhaust method, then reacted with diazonium salt prepared from a powerful primary aromatic amine (p-nitroaniline). Four concentrations of p-nitroaniline were tested from 0.5-7 % owf, produced a range of shades from pale to dark. The study confirmed that fabric was effectively and efficiently dyed with a high degree of color yield. Azoic dyeing produced a uniform bright yellow shade, with homogeneous penetration of the dye molecules. An extended range of plant materials were then investigated, and a significant correlation was found between the total phenolic content of the plant materials and the K/S of the dyed cotton. This confirmed that the proposed method can be used to fix natural dye to a cotton substrate, as long as the plant extract contained polyphenol. The colorimetric properties (L * a * b * , and K/S) of the dyed fabric were compared with those produced by traditional mordants (AlK(SO4)2 and FeSO4). The formation of azo linkages on the fabric was confirmed by ATR FTIR. Color fastness to washing and dry crock fastness were found to be acceptable, though the wet crock fastness and light fastness were low, due to the formation of surface dye on the fibers.
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Dry Finishing Using Plasma Treatment for Shortening the Initial Wet Finishing of Cotton Fabrics
Nezam Samei,Sheila Shahidi,Rattanaphol Mongkholrattanasit 한국섬유공학회 2022 Fibers and polymers Vol.23 No.12
Simultaneity of different processes in finishing of textile products is very useful. It causes reducing energyconsumption and increasing the speed of production. Moreover, by this way it is possible to reduce water consumption andenvironmental pollution. In this research, synchronizing the processes of desizing, scouring and bleaching at ambienttemperature for raw cotton fabrics have been investigated using plasma technology. In this work plasma textile activator,under air atmospheric pressure was used. Untreated and plasma treated cotton fabric were desized, scoured and bleachedusing a solution containing alkaline peroxide and ammonium persulfate as an oxidation accelerator by padding method atroom temperature (Cold Pad Batch). In order to evaluate the results of this treatment, the amount of impurities, degree ofwhiteness and wettability of untreated and plasma treated fabrics were investigated and compared with each other. The resultsshow that the starch partially remains on untreated fabric, while by plasma treatment the starch is completely removed. Plasma treated fabrics have a higher degree of wetting and a higher whiteness than those of untreated. Results of this studyindicate that the plasma treatment of cotton reduces the time it takes to remove starch from cotton products. SEM images ofuntreated and plasma treated fabrics, as well as FTIR spectra of the fabrics; indicate the degradation of starch by the plasmaprocess and the increase of polar groups in cotton fibers. Also, by performing a dry plasma treatment on raw cotton, whileallowing the desizing, scouring and bleaching steps to be simultaneously, economized in water and energy at a single stageand at ambient temperature.
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