Incorporating silver nanoshell-coated mesoporous silica nanoparticles improves physicochemical and antimicrobial properties of chitosan films

• Published in: International journal of biological macromolecules 2021-10, Vol.189, p.792-801
• Main Authors: Abaza, Sana F., Elbialy, Nihal Saad, Mohamed, Noha
• Format: Article
• Language: English
• Subjects: Anti-Infective Agents - pharmacology; Antimicrobial activity; Bacteria - drug effects; Chemical Phenomena; Chitosan - pharmacology; CS films; Elastic Modulus; Mechanical properties; Mesoporous silica nanoparticles; Microbial Sensitivity Tests; Nanoshells - chemistry; Nanoshells - ultrastructure; Optical Phenomena; Porosity; Silver - chemistry; Silver nanoshell; Spectrometry, X-Ray Emission; Spectroscopy, Fourier Transform Infrared; Tensile Strength; X-Ray Diffraction; Yeasts - drug effects
• ISSN: 0141-8130; 1879-0003
• DOI: 10.1016/j.ijbiomac.2021.08.161

Tailoring nanomaterials with tunable properties is of great importance to develop multifunctional candidates in the biomedical field. In the present study, we aimed to develop a promising nano-hybrid system composed of chitosan (CS) and mesoporous silica nanoparticles with a silver nanoshell coat (CS-AgMSNs). The physicochemical properties of CS-AgMSNs films were characterized using various techniques. Further, the mechanical properties of CS-AgMSNs were evaluated and compared with those of undoped CS film. Moreover, the antimicrobial activities of CS-AgMSNs (with different concentrations) were assessed against E-coli, S. aureus, C. albicans, and A. niger. Our results demonstrated that increasing the concentrations of doped AgMSNs (10 to 40 mg) in CS films lowered their transparency and blocked light transmission effectively. The measured elastic modulus of CS-AgMSNs films (20 and 30 mg) showed a decrease in the stiffness of CS films. Also, the elongation at break for CS-AgMSNs (40 mg) indicated a better flexibility. CS-AgMSNs films (10–40 mg) showed an enhanced antimicrobial activity in a concentration-dependent manner compared to undoped CS films. Collectively, the results suggest that our nano-hybrid CS-AgMSNs matrix has unique and promising properties, and holds potential for use in the biomedical field, food packaging, and textile industry. •We developed a hybrid system of chitosan and silver mesoporous silica nanoparticles.•Silver mesoporous silica nanoparticle-doped films show high antimicrobial activity.•Doped chitosan films exhibit an enhanced mechanical strength.•Doped chitosan films can be used in medicine, food packaging, and textile industry.