Publication: Characterization of polypropylene-coated chitosan/silver nanoparticles (agnp) for antimicrobial application
| datacite.subject.fos | oecd::Engineering and technology::Materials engineering | |
| dc.contributor.author | Nazihah Binti Nasri | |
| dc.date.accessioned | 2025-04-29T06:58:28Z | |
| dc.date.available | 2025-04-29T06:58:28Z | |
| dc.date.issued | 2023-09-01 | |
| dc.description.abstract | In fighting against microbial contamination, the fabrication of chitosan/AgNP coating on polypropylene (PP) surface could be an advantage because of the intrinsic antimicrobial and biocompatibility behavior of AgNP and chitosan. This research project aims to fabricate an antimicrobial chitosan/AgNP coating onto plasma-treated PP film via dip coating. The first stage of this study involved of green synthesis of AgNP from turmeric extract via an ultrasonic-assisted method, which AgNO3 and turmeric extract concentration were varied from 1 mM to 10 mM and 5 mL to 25 mL respectively. After 30 minutes, an optimized concentration of AgNO3 (7mM) and turmeric extract (25 mL) were obtained to produce the smallest size of AgNP (9.62 ± 6.72 nm) with biggest inhibition zone on E. coli and S. aureus growth. The presence of organic molecules from turmeric extract on AgNP surface was confirmed via High Resolution-Transmission Electron Microscopy (HR-TEM) and Fourier-Transform Infrared Spectroscopy (FTIR) analysis. Meanwhile, the best plasma current supply (8 mA and 10 mA) and plasma treatment time (15s, 30s, 45s, 60s) during oxygen plasma surface treatment was evaluated on PP surface. The continuous etching action and new functional groups formation had produced PP surface with high average surface roughness (12.46 nm) and low water contact angle (17.95o ± 2.36) after 45 seconds of treatment under 10 mA of current. Subsequently, the immobilization of chitosan/AgNP coating on plasma treated PP was done via dip coating method. In this stage, different chitosan molecular weight (high, medium, and low molecular weights) and chitosan concentration (0.5%, 1.0%, 1.5%, and 2.0% (w/v)) were immobilized onto plasma-treated PP film and evaluated based on FTIR, water contact angle, and Atomic Force Microscopy (AFM) analysis. It was found that 1.5% (w/v) of high molecular weight chitosan produced surface properties with 54% reduction of water contact angle and 29% increment of average surface roughness that is suitable properties for antimicrobial purpose with good coating stability. In the last stage involves of the study on the effect of dipping cycle on antimicrobial activity and adhesion strength of chitosan/AgNP coating. An increasing of dipping cycle did increase the coating thickness and AgNP content but no noticeable differences were observed on antimicrobial activity behavior | |
| dc.identifier.uri | https://erepo.usm.my/handle/123456789/21464 | |
| dc.language.iso | en | |
| dc.title | Characterization of polypropylene-coated chitosan/silver nanoparticles (agnp) for antimicrobial application | |
| dc.type | Resource Types::text::thesis::master thesis | |
| dspace.entity.type | Publication | |
| oairecerif.author.affiliation | Universiti Sains Malaysia |