聚乳酸薄膜的γ射线辐照亲水化及抗菌改性
Hydrophilic and Antibacterial Modification of Poly(lactic acid) Films by γ-ray Irradiation.
作者信息
Qi Yue, Ma Hui-Ling, Du Zhong-He, Yang Bo, Wu Jing, Wang Rui, Zhang Xiu-Qin
机构信息
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.
出版信息
ACS Omega. 2019 Dec 4;4(25):21439-21445. doi: 10.1021/acsomega.9b03132. eCollection 2019 Dec 17.
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--PAA-Ag) exhibited excellent hydrophilicity as well as antibacterial activity compared with the neat PLA film.
为了提高聚乳酸的亲水性并赋予其抗菌性能，通过γ射线辐照将聚丙烯酸（PAA）和银颗粒（AgNPs）同时引入到聚乳酸（PLA）薄膜表面。采用扫描电子显微镜（SEM）/能量色散X射线（EDX）光谱和傅里叶变换红外（FTIR）光谱对改性薄膜的形态和结构进行了表征。通过X射线光电子能谱（XPS）研究了PAA与AgNPs之间的相互作用，证实了AgNPs与PAA羧基上的氧原子之间的配位作用。接触角（CA）测量和抗菌测试表明，与纯PLA薄膜相比，低银含量的改性PLA薄膜（PLA-PAA-Ag）具有优异的亲水性和抗菌活性。
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