Work

Two-step grafting of ethylene glycol dicyclopentenyl ether acrylate and methacrylic acid in silicone films by gamma radiation

Year: 2025

Type: article

Abstract: In this research, medical-grade silicone (SR) films were modified through grafting with ethylene glycol dicyclopentenyl ether acrylate (EGDEA) and methacrylic acid (MAAc) in two steps. To achieve this, gamma radiation was used as a physical initiator, employing both direct irradiation and pre-irradiation oxidative methods. SR films were modified by varying some parameters, including solvent, monomer concentration, and irradiation dose, for the direct method. In the second step, reaction time and temperature were additional parameters evaluated for the pre-irradiation oxidative method. To verify the correct grafting of both monomers and graft copolymers (SR- g -EGDEA and (SR- g -EGDEA)- g -MAAc), they were characterized using various techniques and procedures, including FTIR-ATR, TGA, contact angle, swelling degree, and critical pH. These analyses determined that the inclusion of both monomers into SR films provides a high degree of hydrophilicity and a pH response near 7, which could be helpful in certain applications.

Source: Radiation Physics and Chemistry

DOI: 10.1016/j.radphyschem.2025.113000

Authors: Guadalupe Caballero-Becerra, Y. Aylin Esquivel-Lozano, David Romero-Fierro, Emilio Bucio

Institution: Universidad Nacional Autónoma de México

Language: English

Topic: Polymer Surface Interaction Studies

Subfield: Surfaces, Coatings and Films

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,530

Funders: Universidad Nacional Autónoma de México, Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México