ANTIMICROBIAL EFFICIENCY OF BIO–SYNTHESISED NANOSILVER FINISHED VISCOSE SPUNLACE NON WOVEN FABRIC
2015; World Wide Journals; Linguagem: Inglês
ISSN
2249-555X
Autores Tópico(s)Nanoparticles: synthesis and applications
ResumoSilver is a renowned antimicrobial agent used on textiles from very ancient time till date. A very small quantity of silver is required to inhibit a very wide range of pathogenic microorganisms. Application of silver in nano size on textile substrate has enhanced the antimicrobial efficiency of textiles. Biosynthesis of silver is simple and less hazardous and this green technology is having advantage over chemicals methods. Silver nanoparticles were prepared with plant extracts and were applied on viscose spun lace non-woven fabric. The treated fabric shows excellent antimicrobial activity towards E. coli, S. aureus, C. albicans, A. niger. INTRODUCTION Textiles with inherent feature to inhibit microorganisms are in great demand today. Microbial growth on textiles causes its degradation leading to unpleasant odors, skin infections, discoloration and stains (Damle, Nerurkar, & Adivarekar, 2014). Several chemicals have been used to impart antimicrobial finish to textiles and among them silver had proven to be the best with broad range of antimicrobial efficiency with less toxicity towards mammalian cells (Zhang, Wu, Chen, & Lin, 2009). Antibacterial properties of inorganic materials like silver are due to the release of ions interfering with bacteria and cause decomposition (Farouk, Moussa, Ulbricht, Schollmeyer, & Textor, 2014). Silver nanoparticls can be synthesised via various methods like electrochemical, facile technique, thermal decomposition, micro wave assisted process, sonochemical and green chemistry (Shafaghat, 2015). Syntheses of silver nanoparticles using plant extracts have received attention in the recent times as it is a simple and efficient method with low cost and less hazardous to nature (Vankar & Shukla, 2012), (Iyer, Yashwanthi, Soumya, Selvaraju, & Santhiya, 2013). Therefore the development of silver nanoparticles based on natural extracts is considered as most the appropriate method for environmental reasons (Di, Li, & Zhuang, 2012). MATERIALS AND METHODS Synthesis of silver nanoparticles The synthesis of silver nanoparticles by reducing the silver ions in the silver nitrate solution with water extracts of Chromolaena odorata was done as per the procedure explained by Geetha, Harini, Showmya, and Priya, (2012). Preparation of plant extracts C odorata also known as siam weed is a perennial shrub widely known as pest that grows in open areas and interior shrub jungles of southern Asia and western Africa (Sukanya, Sudisha, Prakash, & Fathima, 2011). The plant is recognized for its anti-pyretic, antimicrobial and anti-inflammatory properties (Vaisakh & Pandey, 2012). The leaves of C odorata were collected from Palakkad district, Kerala, washed in distilled water, shade dried and powdered. C odorata powdered leaf (one gram) was mixed with 10 ml distilled water and was kept for 10 minutes in a water bath at 600C. The mixture was filtered through Whatman No. 1 filter paper and the pure water extract obtained was used for the synthesis of silver nanoparticles. Synthesis of silver nitrate solution Silver Nitrate (0.03 %) was used to prepare solution with 100ml distilled water and add four ml of water extracts of C odorata leaf drop by drop to the silver nitrate solution under constant magnetic stirring for one minute. The colour of the solution changes from colorless to golden brown and to dark brown, indicates the formation of silver nanoparticles. Selection of fabric The need for best performance material at minimum cost has resulted in the usage of non-woven fabric (Walker, 2001). Good absorbency and low linting property makes viscose fiber an appropriate choice for fabricating wound dressings and absorbent pads (Chellamani, Balaji, & Veerasubramanian, 2013). Hence spun lace viscose fabric was selected for the study. Application of silver nanoparticles on fabric The prepared silver nanoparticles suspended solution was sprayed on spun lace viscose fabric within one minute after preparation, with the aid of ultrasonic atomizer at a dispensing speed 100 ml per minute and the treated fabric was dried at room temperature. Scanning electron microscopy Field Emission Scanning Electron Microscope (FESEM) was used to evaluate the silver nanoparticles size and its adhesion on the fabric surface. The samples were analyzed with a magnification of 5.31 KX and 30.0 KX. Antimicrobial assessment of treated fabric Antimicrobial efficiency of the silver nano particles treated fabric was done as per AATCC Test method 90 – 2011, Agar plate method. Various organisms selected for testing were Staphylococcus aurous (NCIM No. 2079), Escherichia coli (NCIM No. 2065), Candida albicans (NCIM NO. 3471) and Aspergillus niger (NCIM No.596) procured from
Referência(s)