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RISS 인기검색어
- 검색키워드
- 저자 : Mahnaz Mahmoudi Rad (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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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.
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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 %.
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Zahra Karami Chemeh,Majid Montazer,Mohammadali Tavanaie,Mahnaz Mahmoudi Rad 한국섬유공학회 2023 Fibers and polymers Vol.24 No.12
Most textiles are electrically insulated, however, creating textile with electrical conductivity increase their usage in wearable electronics and smart textiles and reduce the accumulation of electrical charge. Conductive fabrics can successfully convert into electromagnetic shields. Most applied methods for the production of conductive textiles are cost-effective through difficult and complex methods. This research was aimed at fabricating textiles with ideal multifunctional properties such as anti-static, electrical conductivity, EMI shielding, and antibacterial properties. To do this, the fabrics were coated with carbon black nanoparticles (CB NPs) using a simple and easy dip-padding method. The composition of CB NPs on the surface of the polyester fabric was confirmed with FESEM, FTIR, and EDX image. The samples treated with CB NPs and vinyl acrylic-based resin showed a wide range of electrical resistance from 1 × 1010 to 1 × 105 (Ω.cm). In addition, antibacterial activity against Staphylococcus aureus as Gram-positive bacteria, the mechanical, thermal, and antistatic properties, air permeability, and EMI protection of the samples were evaluated, and superior results were reported for the treated samples. Conductivity measurements and triple stimuli of L* (lightness), a* (red–green), and b* (yellow–blue) showed that more weight percentages of CB NPs on the fabrics led to a significant improvement in the uniform black color and conductivity. In addition, EMI studies in the frequency range of 8.4–12.4 GHz indicated 100% shielding for CB NPs treated fabrics. These promising results are significant for large potential applications of the product with very low cost in various industries.
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