• Textile Coloration and Finishing
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• v.30 no.4
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• pp.245-255
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• 2018

In this study, cotton fabrics were coated with $TiO_2$ nanoparticles using 3-mercaptopropyltrimethoxysilane(3-MPTMS), which is highly reactive to cotton fabrics, as a medium, and the characteristics, antimicrobial properties, and photodegradation properties of the fibers were measured. The manufacturing process is as follows. (1) 3-MPTMS was added to isopropanol, and $TiO_2$ colloid was added to the mixture to prepare a solution. (2) Cellulose fibers were immersed in the prepared $3-MPTMS/TiO_2$ solution, stirred for 90 minutes at $45^{\circ}C$ in a constant temperature water bath, and dried thereafter. In order to identify the morphology of the cellulose fibers coated with $TiO_2$ nanoparticles, the surface was observed with a scanning electron microscope(SEM), and SEM-EDS was measured to identify the adhesion of $TiO_2$ nanoparticles. The SEM images showed $TiO_2$ nanoparticle and 3-MPTMS coated layers on the fibers and it was identified that $TiO_2$ nanoparticles were attached to the cellulose fibers. The antimicrobial activity of $3-MPTMS/TiO_2$-treated cotton fabrics was measured using a bacterial reduction method. $3-MPTMS/TiO_2$ cellulose fibers which was irradiated by ultra violet light, showed antimicrobial activity against Escherichia coli(ATCC 43895) and Staphylococcus aureus(ATCCBAA-1707) unlike unirradiated fibers. The cellulose fibers were stained with methylene blue and the photodegradation performance of the stained fabrics was analyzed. The stained fabrics showed high degradation performance with photolytic reactions of $TiO_2$ nanoparticles.

• Textile Coloration and Finishing
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• v.10 no.1
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• pp.38-42
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• 1998

Both cellulose and chitin together were dissolved in DMAc/LiCl and these solutions were extruded into coagulant of $DMAc/H_2O$. Fibers thus obtained were treated in NaOH aqueous solution. Results showed that the fiber surface contains celluose and chitosan. This means that these fibers treated are composed of three components, ie, cellulose, chitin, and chitosan. These fiber showed secure antibacterial and mechanical properties.

• Textile Coloration and Finishing
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• v.23 no.1
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• pp.28-34
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• 2011

Deep coloration of cotton fabrics with concentrated Rhus verniciflua extract was carried out using large amount of Glauber's salt and a mordant in order to improve dyeability and functional properties such as deodorizing and antimicrobial activity. With increasing in the salt addition upto 80% in the dyeing liquor containing 0.45% extract concentration, K/S value and exhaustion increased threefold from 1.2 to 3.5, indicating that the salt reduced the electrostatic repulsion between the dyes and the cotton fibers. Also the concentrated extract solution to 8% can increase the color build up upto a K/S of 11.1. In addition the combined pre- and post-mordanting methods with potassium alum enhanced the dyeability upto a K/S of 22.2. The ammonia deodorizing property increased with increased color yield of the dyed fabrics. Also the dyed and post-mordanted fabrics with 8% extract concentration showed antimicrobial activity against both Klebsiella pneumoniae and Staphylococcus aureus.

• Textile Coloration and Finishing
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• v.32 no.1
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• pp.38-43
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• 2020

To overcome the harmful effects caused by conventional oxidative hair dyes, natural colorants becomes more popular in the hair dyeing. By extracting Sagassum fusiforme powders with aqueous alkaline solution as a solvent at 130℃ for 60 minutes, a fucoxanthin concentration of up to 216㎍/ml can be obtained. UV/Vis analysis was used to prove the presence of fucoxanthin in the extract powder. A K/S value of 23.8 can be obtained when wool fabrics were dyed with the extract at 120℃ for 60 minutes under pH 2. The color fastness properties of the dyed wool fabrics were very good as indicated by rating 4 for laundering(color change), rating 3 or higher for rubbing, and rating 5 for light irradiation. The dyed wool fabric was found to have antimicrobial activity against Staphylococcus aureus. The antioxidant and antimicrobial activity of the Sagassum fusiforme extract can be an effective functional hair colorant. Hair dyeing with the extract formulation at 45℃ for 40 minutes under pH 5 accomplished a K/S value of 8.9. The color fastness of the dyed hair showed rating 3 against light irradiation, which increased to rating 5 with after-mordanting of tannin acid.

• Textile Coloration and Finishing
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• v.20 no.6
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• pp.18-25
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• 2008

The functional non-woven fabrics have been applied in various industry fields, such as clothing, hygiene, environment, medical and so forth. The functional non-woven fabrics were manufactured by meltblown and finishing processes. These functional non-woven fabrics were based on 5wt% masterbatch using 2,000ppm nano-silver resin composite. Silver is one of the most universal antimicrobial substances. Nano-technology enables us to expand the surface area of silver particles markedly. Silver nano particles were successfully produced less than 50nm in size. The functional non-woven fabrics including nano-silver particles showed excellent antibacterial activities against Staphylococcus aureus (ATCC 6538) and Klebsieila pneumoniae (ATCC 4352). From the results, functional non-woven fabrics including silver nano particels probably will be available as a good and safe antibiotic alternative, such as mask medium filter, water purifier filter, hygiene wet tissues, marine products pad and so forth.

• Fashion & Textile Research Journal
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• v.10 no.2
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• pp.260-266
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• 2008

Recently there has been a growing interest in the use of natural dyes in textile applications. Natural dyes can exhibit better biodegradability and generally have a higher compatibility with the environment. In this study, the colorants of clove were extracted with boiling water. Chitosan crosslinked cotton fabrics have been dyed with aqueous extract of clove and their dyeabilities on the fabrics were studied. Additionally the fastness to washing and light, and the effects on antimicrobial properties were also investigated. Cotton fabrics were treated with a crosslinking agent epichlorohydrin in the presence of chitosan to provide the cotton fabrics the dyeing properties of natural dye(clove) by the chemical linking of chitosan to the cellulose structure. This process was applied by means of the conventional mercerizing process. The chitosan finishing and durable press finishing of the cotton fabrics occurred simultaneously in the mercerization bath. The dyeability(K/S), which was obtained by CCM observation, remarkablely became increased when the crosslinked chitosan concentration was higher. The hue value indicated reddish yellow with increasing the crosslinked chitosan concentration. And the color fastness to washing and light was the almost the same. The chitosan treated cotton fabrics showed very high activities with almost 100% reduction.

• Textile Coloration and Finishing
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• v.20 no.6
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• pp.1-7
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• 2008

The effects of $TiO_2$ contents and UV irradiation treatment on the surface properties of PLA films embedded with $TiO_2$ nanoparticle were investigated. Whereas UV irradiation decreased reflectance of the treated PLA films proportionally with increasing UV energy, the reflectance of PLA/$TiO_2$ films increased with increasing UV energy. The UV irradiation treatment caused PLA/$TiO_2$ blend films more polar as indicated in the generation of new carbonyl group and decrease in zeta potentials, which was more pronounced with the introduction of $TiO_2$. Upon UV irradiation, $TiO_2$ particles appeared on the film surface as observed in SEM images. The PLA/$TiO_2$ blend films showed photocatalytic properties such as photobleaching of methylene blue, deodorization of ammonia and antimicrobial activity in comparison with pure PLA films.

• Textile Coloration and Finishing
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• v.28 no.4
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• pp.290-298
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• 2016

In this study, the efficacy of water lily(Nymphaea tetragona) leaves as a new natural dye resource was investigated. For this purpose, the colorants from water lily leaves were extracted in methanol, evaporated, and powdered. Dyeing onto cotton fiber was carried out to study the effects of dyeing conditions, mordant type and mordanting method on dye uptake, color change, and colorfastness. FTIR analysis supported that hydrolyzable tannins and chrolophyll were contained in the extracted colorants. The colorants showed good affinity to cotton fiber showing Y Munsell color. Pre-mordanting method gave better results in terms of dye uptake than post-mordanting method. By mordanting, dyed fabrics exhibited various colors such as green, khaki, brownish yellow, dark brown, dark gray and so on. Colorfastness to washing and rubbing was relatively good showing 4-5 rating. The light fastness was improved 1-2 rating by Fe mordanting. The dyed cotton fabric showed antimicrobial activity.

• Textile Coloration and Finishing
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• v.14 no.2
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• pp.94-94
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• 2002

A number of studies have been introduced on the use of quaternary cationic agents having various reactive groups, which can improve the substantivity of anionic dyes, specially direct dyes, towards cotton. In the case of direct dyes, it is well known that they are widely used due to their convenience to apply and low cost, whilst they display poor levels of fastness properties to washing. Thus many applications using direct dyes in the textile fields have been still enjoyed in the areas where a higher level of wet fastness is specially not required. This work herein comprises that in order to improve the substantivity of direct dyes towards cotton, cellulose-reactive allylamine polymer namely, triazinyl N,N′-dimethyl-N,N′-diallyl ammonium chloride was prepared and treated onto cotton to provide cationic properties within substrates. This application showed that even low concentration of electrolytes being present, the direct dyes were exhausted well on the cationized cotton and that the rate of dye uptake by treated cotton was faster than that of untreated sample. Furthermore the antimicrobial properties were observed from the cationized samples.

• Textile Coloration and Finishing
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• v.29 no.3
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• pp.148-154
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• 2017

Many researches have been made on the processing technology of Poly(ethylene terephthalate) (PET), which is widely used for clothing and non-clothing applications. In this study, we coated PET filaments with m-aramid resin to improve heat resistance and antimicrobial properties. In order to enhance adhesion between PET and m-aramid polymer, the adhesive polymer was coated on the PET filaments using a winding speed of 100m/min and then treated with m-aramid. Scanning electron microscopy was used to analyze the surface of the adhesive polymer and m-aramid treated PET filament. The change of initial degradation temperature according to treatment was confirmed by thermogravimetric analysis. Antimicrobial activity analysis using bacterial reduction method showed that PET filament treated with adhesive polymer and m-aramid had an increased antibacterial effect compared to untreated PET filament.