大气压射流等离子体引发PVC表面接枝聚合季铵盐及其抗菌性的研究  

Graft polymerization of quaternary ammonium compounds on PVC surfaces initiated by atmospheric pressure plasma jet and its antibacterial properties

作　　者：刘亚峰 孙涛 孙红梅 马中洋 隋思源 倪国华 LIU Yafeng;SUN Tao;SUN Hongmei;MA Zhongyang;SUI Siyuan;NI Guohua(Institute of Plasma Physics,Hefei Institute of Physical Science,CAS,Hefei 230031,China;Science Island Branch of Graduate School,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学院合肥物质科学研究院等离子体物理研究所,合肥230031 [2]中国科学技术大学研究生院科学岛分院,合肥230026

出　　处：《功能材料》2023年第4期4141-4149,共9页Journal of Functional Materials

基　　金：国家自然科学基金项目(11875295,12105325)。

摘　　要：为了提高医用聚氯乙烯(PVC)抗菌性,采用大气压等离子体射流(APPJ)技术对PVC表面接枝并制备季铵盐(QAC)涂层。通过纹影仪和发射光谱仪诊断了等离子体射流的流动状态和活性组分,结合静态水接触角方法、扫描电子显微镜、X射线光电子能谱仪表征和分析APPJ处理前后PVC表面的亲水性、微观形貌和化学组分,并测试了季铵盐/PVC对大肠杆菌的抗菌性能。结果表明,随着放电电压的增大,与PVC接触区域的等离子体射流流动状态从层流向湍流转变,PVC表面亲水性增强,改性后的PVC表面水接触角最低可达26°,含氧官能团含量高达31.02%(原子分数)。放电电压的增大,有助于PVC表面含氧官能团量的提升,并促进季铵盐在PVC表面的接枝和聚合形成致密涂层,提高其对大肠杆菌的抗菌性能。To improve the antibacterial properties of medical polyvinyl chloride(PVC),atmospheric pressure plasma jet(APPJ)technology was used to graft and prepare quaternary ammonium compounds(QAC)coatings on the PVC surface.The flow state and active components of the plasma jet were diagnosed by ripple shadowing and emission spectroscopy,respectively.The hydrophilicity,microscopic morphology and chemical components of the PVC surface before and after plasma treatment were characterized by static water contact angle method,scanning electron microscopy and X-ray photoelectron spectroscopy,respectively.The antibacterial performance of QAC/PVC against Escherichia coli was also tested.The results showed that with the increase of discharge voltage,the plasma jet flow state in the area of contact with PVC changed from laminar to turbulent flow.After plasma modification,the hydrophilicity of the PVC surface was enhanced.The water contact angle of the modified PVC surface could be as low as 26°,and the content of oxygen-containing functional groups was as high as 31.02 at%.The increase of discharge voltage contributes to the enhancement of the amount of oxygen-containing functional groups on the PVC surface and promotes the grafting and polymerization of quaternary amines on the PVC surface to form a dense coating,which improves its antibacterial performance against E.coli.

关 键 词：大气压等离子体射流 聚氯乙烯 表面改性 季铵盐 抗菌 

分 类 号：TQ316.6[化学工程—高聚物工业]