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RISS 인기검색어
- 검색키워드
- 저자 : Aminoddin Haji (검색결과 5 건)
- 무료
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Aminoddin Haji,Ahmad Mousavi Shoushtari 한국섬유공학회 2019 Fibers and polymers Vol.20 No.5
The aim of this study is to prepare a polypropylene nonwoven with the ability to adsorb both anionic and cationiccompounds from aqueous media. Polypropylene nonwoven was activated with oxygen plasma and acrylic acid was graftedon it. Then, poly(propylene imine) dendrimer was grafted on it by a pad-dry-cure process. The effect of three parameters onthe dendrimer grafting yield was studied and the process was optimized using response surface methodology. The preparedsamples were analyzed using ATR-FTIR, FESEM, EDS, AFM, and XPS. The results of different analyses confirmed thegrafting of acrylic acid and dendrimer on the surface of the polypropylene nonwoven. The XPS results showed that thesample prepared under the optimal conditions contains both amine and carboxylic acid groups which enables it to interactwith various compounds. The ability of acrylic acid grafted and dendrimer grafted samples for removal of model anionic andcationic dyes was studied. The dendrimer grafted sample removed more than 70 % and 99 % of cationic and anionic dyesfrom water, respectively.
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Improving the Dyeability of Polypropylene Fibers Using Nanoclay and Plasma Treatment
Aminoddin Haji,Rouhollah Semnani Rahbar,Amin Ebrahimzade 한국섬유공학회 2021 Fibers and polymers Vol.22 No.5
In this study, polypropylene (PP) and polypropylene/nanoclay composite multifilament yarns with differentnanoclay contents were prepared by melt spinning. The knitted fabrics were then made from these yarns and subjected tooxygen plasma treatment for 5 min. The samples were dyed with a disperse dye and an acid dye and the color strength, colorcoordinates, and fastness properties of the dyed samples were compared. The effect of plasma treatment on the surfacechemistry and morphology of the samples was evaluated using Fourier-transform infrared spectroscopy (FTIR) and atomicforce microscopy (AFM) analyses, respectively. FTIR analysis confirmed the introduction of oxygen-containing groups onthe surface of the plasma-treated samples. AFM images confirmed etching of the fibers, and the surface roughness of thefibers increased significantly after plasma treatment. The incorporation of nanoclay in the multifilament yarns improved thedyeability of the polypropylene/nanoclay composite fibers with disperse and acid dyes. The optimum amount of the nanoclayfor obtaining the highest color strength was 2 wt% and 1 wt%, for dyeing with the disperse and acid dye, respectively. Plasmatreatment enhanced the dyeability and fastness properties of the fibers. The highest K/S values obtained on plasma-treated PP/nanoclay samples were 1.27 and 10.88 for acid and disperse dyes, respectively. The fastness properties of the samples dyedwith the acid dye were generally lower than those of dyed with the disperse dye. The highest washing, dry rubbing, and lightfastness properties were obtained on plasma-treated and disperse-dyed PP/nanoclay (2 %) sample, which were 4-5, 3, and 5,respectively.
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Aminoddin Haji,Saba Ashraf,Majid Nasiriboroumand,Caroline Lievens 한국섬유공학회 2020 Fibers and polymers Vol.21 No.4
In this study, the effect of surface modification of wool fiber with oxygen plasma and chitosan (PC) on the colorstrength of the samples dyed with cochineal and safflower natural dyes has been studied. According to colorimetricmeasurements, plasma and chitosan treatments resulted in notable improvements in dyeability of wool fibers. The plasma andchitosan-treated wool sample could be dyed in less time and at lower temperature compared with untreated one. The dyebathpH had a prominent effect on color strength, which showed that the electrostatic force has an important role in dyeadsorption. The optimum pH for maximum dye absorption was 3.6. The fastness properties, tensile strength, and elongationat break of dyed wool were improved after PC treatment. Scanning electron microscopy (SEM) images and ATR-FTIRanalysis proved the coating of wool scales with a uniform thin layer of chitosan, which caused the improved dyeability ofwool fibers with safflower and cochineal.
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Isotherm and Kinetic Studies in Dyeing of Citric Acid-Crosslinked Cotton with Cationic Natural Dye
Aminoddin Haji,Seyed Mansour Bidoki,Firoozeh Gholami 한국섬유공학회 2020 Fibers and polymers Vol.21 No.11
In this study, cotton fabric was crosslinked with citric acid (CA) in the presence of sodium hypophosphite using apad-dry-cure process under the optimum conditions. The chemistry and morphology of the crosslinked fibers were studiedand compared with the untreated fibers using FTIR and SEM. The crosslinked fabric was dyed with the natural cationic dye,berberine, obtained from the roots of Berberis vulgaris. The effects of dyebath conditions, including dye concentration, pH,and temperature, on the color strength of the dyed samples were investigated, and the mean values were compared usingSPSS. The isotherm and kinetics of the dyeing of the CA-treated fabric with berberine were investigated. The results showedthat the color strength of the dyed samples increased with increasing the dye concentration, pH, and temperature. The bestfittingisotherm and kinetic models were Freundlich and pseudo-second-order models, respectively.
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Aminoddin Haji,Majid Nasiriboroumand,Sayyed Sadroddin Qavamnia 한국섬유공학회 2018 Fibers and polymers Vol.19 No.11
In this study, Berberis vulgaris L. wood as an agricultural waste was used for dyeing and functional finishing of cotton. To facilitate the attachment of natural dye, citric acid was used to create carboxylic acid functional groups on cotton fibers. The process of crosslinking of cotton fabric with citric acid was optimized in order to obtain the maximum dyeability with the cationic natural dye. The effects of three important factors including citric acid concentration, sodium hypophosphite concentration and curing temperature on the color strength of the dyed samples with woods of barberry tree were analyzed by response surface methodology and the optimum conditions for obtaining the highest color strength was obtained. The crosslinking of citric acid on cotton fibers was confirmed by FTIR spectroscopy. The dyed sample prepared under the optimum conditions of crosslinking showed good wash and light fastness properties besides very good antibacterial activity against gram-negative and gram-positive bacteria.
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