Photo bleaching of wool using nano TiO2 under daylight irradiation

Majid Montazer,Somaye Morshedi 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.1

Wool bleaching is usually carried out on raw wool through treatment with oxidizing or reducing agents. Here, nano TiO2 as a photocatalyst was applied on raw wool fabric to decompose the naturally occurredpigments under daylight irradiation. To enhance nano particles adsorption on the fabric, it was firsttreated with protease and then treated with nano TiO2 along with citric acid. The whiteness andyellowness indexes and hydrophilicity features of the treated wool fabrics indicated a reasonablewhiteness with a significant improved hydrophilicity. This new wool bleaching approach was named as‘‘nano photo bleaching’’ as a most successful bleaching application.

Single-step Synthesis and Characterization of Zr-MOF onto Wool Fabric: Preparation of Antibacterial Wound Dressing with High Absorption Capacity

Reihane Rezaee,Majid Montazer,Ali Mianehro,Mahnaz Mahmoudirad 한국섬유공학회 2022 Fibers and polymers Vol.23 No.2

Improvement of curative herbal extracts effectiveness through novel drug delivery systems is a field of study forthe researches nowadays. Zirconium-based metal-organic frameworks (Zr-MOFs) are one of the most capable porousnanocarriers that need a biocompatible template to be used in biomedical applications. In this work, Zr-MOF was synthesizedinto the wool fabric through in-situ one-pot method with different molar ratios. The final fabrics were characterizedthoroughly using various techniques and the effect of components on monodispersity and nucleation tendency of Zr-MOFonto the surface of wool were explained. The resultant fabric stablished absolute wash durability, increased air-permeabilityup to twice and reasonable hydrophilicity. Tensile strength and young modulus decreased 30 and 1244 % and strain increased66 %. Salvia Officinalis (SO) and Calendula Officinalis (CO) extracts were loaded onto the modified fabrics with 1154 and1842 % increased absorption capacity. The release profiles showed domination of diffusion mechanism. The wool-MOF-SOand CO displayed both 100 % antibacterial activity against Escherichia coli and 60.95 and 64.64 % against Staphylococcusaureus because of diverse antibacterial components. Calendula Officinalis proved biocompatibility with human skin howeverSalvia Officinalis exhibited high toxicity.

Facile technique for wool coloration via locally forming of nano selenium photocatalyst imparting antibacterial and UV protection properties

Maryam Razmkhah,Majid Montazer,Ali Bashiri Rezaie,Mahnaz Mahmoudi Rad 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.101 No.-

The lowering intake of organic dyes and their auxiliaries by employing nanoparticles for some specialtextile coloration is novel and interesting topic. Nonetheless, application of reducing, stabilizing andother chemical agents in textile nano-coloration is still undesirable from both environmental andhuman/aquatic life viewpoints. This research renders a facile technique for wool coloration throughlocally forming selenium nanoparticles using sodium selenite without using other chemicals. Beingindustrially enforceable, free from use of additional chemicals, showing photo-active ability to discolorthe dyeing effluent and low-toxic colorant are the main privileges of the used method. The wool fabricswere colored light to dark orange depending on coloration time and concentration of sodium selenite. Also, the color fastness properties against washing, rubbing and acid/alkaline spotting of prepared sampleswere excellent. Moreover, the colored fabrics indicated reasonable bactericidal and fungicidal performancestoward Escherichia coli, Staphylococcus aureus and Candida albicans (95, 70 and 100 %,respectively) and still remained compatible with human skin. The in-situ synthesis of selenium nanoparticleson wool fabric not only colored the wool but also promoted the UV-protecting performance by61.82 %, photocatalytic activity through methylene blue discoloration under sunlight by 97.22 % and tensilestrength by 11.27 %.

Simultaneous Superhydrophobic and Photo-catalytic Properties on Polyester Fabric: Prior in-situ Synthesis of Nano ZnO with Subsequent Fluorochemical-based Water Repellent Treatment

Niloufar Norouzi,Majid Montazer,Ali Akbar Gharehaghaji 한국섬유공학회 2022 Fibers and polymers Vol.23 No.12

A combination of two significant requirements of low surface energy and roughness should be utilized to obtainthe lotus effect on polyester fabric. In this research, ZnO nano-particles were first in-situ synthesized on the polyester fabricusing zinc nitrate and NaOH to create nano-roughness as one requirement for producing a superhydrophobic surface. TheZnO pre-treated fabrics were then irradiated under sunlight for seven consecutive days to enhance the hydrophilicity. Theywere then treated with a fluorocarbon-based water repellent through the pad-dry-cure method to generate the surface with lowenergy. The produced fabric considered as a substrate manipulated the lotus topography. The superhydrophobic properties oftreated fabrics were investigated through contact and sliding angles, spray, and water drop tests. The surface morphology wasobserved under SEM, and the presence and distribution of Zn and F elements were proved by EDX and mapping pictures. The self-cleaning behaviors were examined by discoloration of Methylene Blue as a stain under daylight irradiation. Theinfluence of nano ZnO pre-treatment and then daylight irradiation was positively indicated on the fluoropolymer posttreatmentthat was provided a superhydrophobic fabric with sliding and contact angles of 8 and 157.3 °, respectively.

Click Electroless Plating and Sonoplating of Polyester with Copper Nanoparticles Producing Conductive Fabric

Bahareh Moazzenchi,Majid Montazer 한국섬유공학회 2020 Fibers and polymers Vol.21 No.3

Here, copper nanoparticles were in situ synthesized on polyester fabric using cost effective chemicals, withoutstabilizing and sensitizing agents through a simple click electroless plating method to attain the electrical conductivefabric. Central composite design based on response surface methodology was applied to study the influence of copper saltprecursor and reducing agent concentration on the electrical resistivity. The best sample with the lowest electricalresistivity was chosen and analyzed and then similar processing conditions were applied under ultrasonic conditionbesides final fabrics were subjected to the diverse characterizations. Findings suggested the potentiality of the one-potsonoplating method for fabrication of copper nanoparticles on polyester fabric. The successful synthesis of coppernanoparticles on the polyester fabric was verified by scanning electron microscopy (SEM) images and X-ray diffraction(XRD) patterns. A remarkable low electrical resistivity of 0.5 Ω·cm obtained on the sonotreated samples produced withincorporation of copper nanoparticles. Further, good results indicated on the mechanical properties of the copper treatedfabrics. All of the observations perceive the great potential applications of the product in electrical, medical and smarttextiles industries.

In-situ Synthesis of SiO2 Nanoparticles on Polyester Fabric as Benign Multi-purpose Catalysts

Bahare Nozari,Majid Montazer,Mahnaz Mahmoudi Rad 한국섬유공학회 2018 Fibers and polymers Vol.19 No.12

Here, silica nanoparticles (NPs) as safe multi-purpose catalysts were in situ synthesized on PET fabric to achieve a higher quality fabric. The PET fabric was treated in an aqueous solution of sodium silicate and ammonia at boil for 1 h to insitu synthesis silica NPs along with aminolysis of the fabric. Effect of silica NPs as the multi-purpose catalysts on the fabric were subjected to various analysis such as self-cleaning, hydrophilic, antibacterial and antifungal properties and also thermal resistance. The surface morphology, the crystalline structure and elemental analysis were studied by Field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and map and energy dispersive X-ray (EDX) analysis. The optimized treated fabric indicated 4 s for the water to spread and 65 o for contact angle provided higher hydrophilic properties. Silica NPs on the fabric showed thermo-catalytic behavior protecting against yellowing at high temperature (200 oC for 3 h) proved the higher thermal resistance of the treated fabric. Also, the fabric specified good self-cleaning properties through discoloration of methylene blue solution. Further, the treated fabric proposed 100 % anti-bacterial and anti-fungal activities against Staphylococcus aureus, Escherichia coli and Candida albican along with good cell viability. Overall, this research indicates silica NPs as multi-purpose catalysts including photo, bio and thermo-catalyst on the PET fabric using low price materials.

A Novel Semi-bionanofibers through Introducing Tragacanth Gum into PET Attaining Rapid Wetting and Degradation

Sara Jalali,Majid Montazer,Reza Mohammad Ali Malek 한국섬유공학회 2018 Fibers and polymers Vol.19 No.10

Untreated polyethylene terephthalate has limitation in some medical applications, such as wound dressing due to the hydrophobic property. Thereby, Tragacanth Gum (TG) as a natural polysaccharide utilized in polymer solution led to novel semi-bionanofibers of PET/TG blends (15:1, 15:2 and 15:3) through electrospinning method. Fourier transform infrared spectroscopy results confirmed the existence of hydrophilic groups of TG such as hydroxyl groups. Moreover, twice water uptake of PET/TG comparing with PET nanofibers indicated the hydrogel properties, also PET/TG nanofibers possessed high surface wettability through reduction of contact angle from 113 to 0 o. Further, differential scanning calorimetry analysis indicated the alteration in the crystalline structure of PET/TG nanofibers that led to faster degradation in various pH values. The SEM images of PET/TG nanofibers displayed the greater average diameter with increasing TG content (283 nm) comparing with PET nanofibers (193 nm). Also introducing more TG in the nanofibers exhibited lower mechanical properties.

Mothproofing of wool fabric utilizing ZnO nanoparticles optimized by statistical models

ALI NAZARI,Majid Montazer,Mehdi Dehghani-Zahedani 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6

Wool with high strength, elasticity, and resiliency has good dye-ability and comfort however could bedigested by keratinolytic enzymes. In this research, wool fabric pre-treated with BTCA and then treatedwith nano ZnO. The treated fabrics showed mothproofing activity against the larvae of carpet beetle,Anthrenus verbasci, as feeding protein fibers. The role of both BTCA and nano ZnO concentrations onmothproofing properties of the wool fabric were optimized using statistical model of response surfacemethodology (RSM). Mothproofing was investigated through assessing wool weight loss during feedingby A. verbasci. The analysis of variance (ANOVA) was utilized to obtain the optimum models for woolwith mothproofing properties. The damages on the wool surface confirmed with scanning electronmicroscopy and digital camera images. Further transmission and absorbance spectra approved the UVprotection properties of the nano ZnO treated wool in both UVA and UVB.

Natural and organo-montmorillonite as antibacterial nanoclays for cotton garment

Ali Sadeghian Maryan,Majid Montazer 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.22 No.-

Here, antibacterial activities of the powder and colloidal forms of natural and organo-montmorillonite(Mt) and also clay mineral and the cotton fabrics treated with various Mt and clay mineral wereinvestigated against S. aurous as Gram-positive and E. coli as Gram-negative bacteria based on AATCC 100standardmethod. The durability of the treated cotton fabrics was also studied against home laundering. The cell cytotoxicity of natural and modified montmorillonite was assessed through MTT against cellfibroblast of human skin. The natural and organo-Mt in powder and colloid forms and also on the cottonfabrics indicated good antibacterial activities however clay mineral showed no antibacterial properties. Further, the kinetic of bacteria killing of treated cotton fabrics followed Chick–Watson model. Naturalmontmorillonite indicated lower cytotoxicity in comparison of cell viability of natural and modifiedmontmorillonite with human skin cell.

Clean Sono-synthesis of ZnO on Cotton/Nylon Fabric Using Dopamine: Photocatalytic, Hydrophilic, Antibacterial Features

Elham Siami Aminloo,Majid Montazer 한국섬유공학회 2021 Fibers and polymers Vol.22 No.1

In this paper, zinc oxide nanoparticles (NPs) were synthesized through sonication method as a green technique on50/50 nylon/cotton (N/C) blend fabric to create multi-functional purposes. The N/C blend fabric was treated with zinc acetateas an initial material to synthesis ZnO NPs in presence of dopamine hydrochloride (DP). Herein, different concentrations ofDP (0.01, 0.02, 0.05 and 0.50 g/l) were used to investigate its effect on characterizations of the treated fabrics with zincacetate. Surface of the raw and treated fabrics was characterized via Field emission scanning electron microscopy (FESEM),X-ray diffractometer (XRD) and UV-Visible absorption spectroscopy. The weight percentage of the zinc on the fabric wasroughly determined by EDX analysis. The DP perfectively affected on the morphology of ZnO NPs changed their shape tothe nanosheets. The hydroxyl groups on the DP create appropriate conditions for adsorption of the more ZnO NPs on surfaceof the fabric, consequently increasing degradation rate of methylene blue. In addition, antibacterial activities of the ZnO NPswere significantly growing to 100 % against Escherichia coli. Overall, this work indicates that DP can enhance someimportant functions of ZnO NPs on the N/C blend fabric including hydrophilic properties, photo and bio activities.