Controlled Release and Long-Term Antibacterial Activity of Dialdehyde Nanofibrillated Cellulose/Silver Nanoparticle Composites

Abstract

Nanofibrillated cellulose (NFC) is becoming popular in antibacterial material due to its favorable biocompatibility, stability, and modifiable properties, which give it a great potential as a template for the deposition of silver nanoparticles (Ag NPs). To investigate the deposition procedure and antibacterial ability of Ag NPs, dialdehyde nanofobrillated cellulose (DATNFC) prepared by oxidation of nanofibers was used to initiate the silver mirror reaction. Silver nanoparticles (∼31.07 nm) were successfully fabricated and uniformly anchored onto DATNFC (DATNFC@Ag). The film containing DATNFC@Ag via vacuum filtration showed excellent mechanical properties and exhibited efficient antibacterial activity against both Staphylococcus aureus and Escherichia coli. Dialdehyde nanofobrillated cellulose-induced silver ions release slowly, which displayed a controllable release of silver ions with a rate of 0.63% per 2 days and an ultralong Ag + release period of 323.6 days. The Ag + release time was prolonged due to the efficient in situ immobilization of silver nanoparticles. This study offers a novel and simple way to fabricate a green, controlled release and long-term antibacterial material based on dialdehyde nanofibrillated cellulose/silver-nanoparticle composites and opens a new window for the rapid and highly efficient synthesis of silver nanoparticles.

Green synthesized AgNPs decorated on Ketjen black for enhanced catalytic dye degradation

“…Particularly, the spectra exhibit doublet peaks which arose from the spin-orbit coupling Ag 3d 3/2 and Ag 3d 5/2 ; the corresponding peaks are located at 373.5 and 367.5 eV, respectively. The splitting of the 3d doublet of Ag was approximately 6.0 eV, indicating that Ag was formed on the surface of Ketjen black [46].…”

Cellulose-Based Hydrogels for Wastewater Treatment: A Concise Review

“…A plethora of challenges generated by the excessive use of fossil resources and non-biodegradable materials result in shifting the attention of researchers toward renewable and environmentally safe materials. At this juncture, biopolymers are used in different areas such as agriculture, food packaging, biomedical applications, and wastewater treatment [ 55 , 64 , 65 , 66 , 67 , 68 , 69 , 70 ]. Similarly, when it comes to the removal of dyes and heavy metals by adsorption process, biopolymer-based hydrogels such as CBHs are suitable due to their better functionality, good solubility in organic solvents, enhanced surface area, abundancy, low-cost, better adsorption capacity, biodegradability, and ease of fabrication and recyclability.…”

Characterisation of carboxylate nanocrystal cellulose /silver nanoparticles from eucalyptus pulp and its antitumour activity

“…This method was adapted from Li J et al ( 2019) (Li et al 2019) with a minor modi cation. In brief, 0.05 g of 1.5wt%Ag-cCNC sample was mixed with 50 mL of DI water in a screw cap centrifuge tube and incubated at a temperature of 37 °C.…”