What is it about?
In this work, poly (vinyl alcohol) (PVA) was employed to produce a Mesoporous Composition of Matter-48 Modified (MCM-48-M or MCM-48-PVA). After surface modification, MCM-48-M was used to produce nanocomposite (NC) films with polycaprolactone (PCL) as a matrix at room temperature.
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Why is it important?
PCL and MCM-48 nanoparticles (NPs) were chosen due to their great biocompatibility and low toxicity. However, MCM-48-M is more compatible with PCL than MCM-48. NC films were sterilized by gamma radiation with a dose of 25 kGy and characterized by experimental techniques to investigate their chemical, mechanical (tensile) and thermal properties. Scanning electron microscopy (SEM) and transmission electronic microscopy (TEM) results indicated that MCM-48-M exhibited a random distribution in the PCL matrix. The PCL chemical structure was preserved in NC films as described by Fourier transform infrared (FT-IR) spectroscopy as well as the tensile and thermal properties of NC films. FT-IR and thermogravimetric analysis (TGA) results showed surface modification. X-ray diffraction (XRD) and differential scanning calorimetry (DSC) showed that crystalline symmetries were preserved and the crystallinity of NC films had small variations in all samples before and after irradiation, respectively.
Perspectives
• The surface of the MCM-48 was modified with PVA. • The chemical structure of PCL was preserved in NC films irradiated at 25 kGy. • The thermal and mechanical properties of PCL/MCM-48-PVA NC films did not indicate major changes after exposure to 25 kGy. • The experimental techniques for sterilization of PCL/MCM-48-PVA NC films proved to be adequate.
Prof. Dr. Carlos Alberto Brito da Silva Jr.
Universidade Federal do Para
Read the Original
This page is a summary of: Gamma radiation effect on the chemical, mechanical and thermal properties of PCL/MCM-48-PVA nanocomposite films, Heliyon, July 2023, Elsevier,
DOI: 10.1016/j.heliyon.2023.e18091.
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