Silver Nanoparticles Deposited Algal Nanofibrous Cellulose Sheet for Antibacterial Activity
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Nanofibrillated, intertwined, and bird’s nest type cellulose (Iα) was extracted from green filamentous seaweed Chaetomorpha crassa by using simple bleaching agent. Silver nanoparticles were grown over seaweed cellulose sheet by using single-step hydrothermal method. The nanofibrillated cellulose and silver nanoparticles deposited cellulose sheets were characterized by FTIR, SEM-EDX, TGA, XRD, UV-Visible spectroscopy, and tensile strength. XRD peaks showed that seaweed cellulose was highly crystalline (crystallinity index: 83.21%) and acted as reducing agent, reducing Ag2O/Ag2CO3 to metal silver. The average diameter of seaweed nanofibrous cellulose and silver nanoparticles were 25 nm and 56 nm, respectively. The broad spectra in UV-Vis analysis indicated that silver nanoparticles had agglomerated. Silver deposited sheet was thermally stable as compared to cellulose sheet. Nanosilver-coated cellulose sheet has been found with good antimicrobial property against the gram-positive (Staphylococcus aureus: 54.5%) and the gram-negative (Escherichia coli: 43.8%) microbes. The laboratory findings reveal that with the use of marine raw material along with straightforward manufacturing process, the antibacterial sheet can effectively develop for applications in pharmaceutical, biomedical, food packaging, textile, water treatment, and biotechnological industries.
KeywordsSeaweed Nanofibrillated cellulose (Iα) Ag2O/Ag2CO3 Silver nanoparticles Straightforward manufacturing Antibacterial sheet Biomedical
The authors are thankful to Mr. B.k. Solanki of Sigma Public School, Porbandar, and the local fishermen of Bhavpara, Gujarat, India, for their constant support in the tedious task of collection of seaweed samples under the sea close to Bhavpara region. The authors are also thankful to Mr. Brajmohan for his constant support.
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