Hydrophilic and Antibacterial Modification of Poly(lactic acid) Films by γ-ray Irradiation

Yue Qi; Hui-Ling Ma; Zhong-He Du; Bo Yang; Jing Wu; Rui Wang; Xiu-Qin Zhang

doi:10.1021/acsomega.9b03132

Hydrophilic and Antibacterial Modification of Poly(lactic acid) Films by γ-ray Irradiation

ACS Omega. 2019 Dec 4;4(25):21439-21445. doi: 10.1021/acsomega.9b03132. eCollection 2019 Dec 17.

Authors

Yue Qi¹, Hui-Ling Ma¹, Zhong-He Du¹, Bo Yang¹, Jing Wu¹, Rui Wang¹, Xiu-Qin Zhang¹

Affiliation

¹ Beijing Key Laboratory of Clothing Materials R & D and Assessment, Beijing Engineering Research Center of Textile Nanofiber, School of Materials Design & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China.

Abstract

To improve the hydrophilicity and imparting antibacterial properties to poly(lactic acid), poly(acrylic acid) (PAA) and silver particles (AgNPs) were simultaneously introduced onto the surface of poly(lactic acid) (PLA) films by γ-ray irradiation. The morphology and structure of the modified films were characterized by scanning electron microscopy (SEM)/energy-dispersive X-ray (EDX) spectrometry and Fourier transform infrared (FTIR) spectroscopy. The interaction between PAA and AgNPs was investigated by X-ray photoelectron spectroscopy (XPS), confirming the coordination between AgNPs and the oxygen atom on the carboxylic group of PAA. The contact-angle (CA) measurements and antibacterial tests showed that the modified PLA films with a low silver content (PLA-g-PAA-Ag) exhibited excellent hydrophilicity as well as antibacterial activity compared with the neat PLA film.