抗菌型含氟丙烯酸酯共聚物涂膜的制备及性能研究

Preparation and Properties of Antibacterial Fluorinated Acrylate Copolymer Films

以甲基丙烯酸十二氟庚酯((MBFA-12)、甲基丙烯酸甲酯(MMA)、3-烯丙基-5,5-二甲基海因(ADMH)为原料单体,以双(2-乙基己酯)琥珀磺酸钠(AOT)为乳化剂,采用反相微乳液聚合法制备了含氟丙烯酸酯共聚物抗菌涂层。利用红外光谱(FTIR)、核磁共振波谱(NMR)分析表征了共聚物的结构组成,并通过接触角及X射线光电子能谱(XPS)对共聚物表面亲疏水性及表面化学成分进行分析,探讨了含氟单体用量对共聚物膜表面性能的影响。进一步以大肠杆菌(Escherichia coli,E.coli)进行抑菌测试,考察了ADMH单体用量对共聚物抗菌性能的影响。结果表明,随含氟单体用量的增加,共聚物成膜后空气侧及玻璃侧的接触角均增大,但含氟链段在成膜时更易于向涂膜-空气界面迁移,涂膜-空气侧接触角高于涂膜-玻璃侧接触角;膜抗菌性能显示,ADMH单体的引入,提供了共聚物的抗菌特性,对大肠杆菌的杀灭率最高能达到90.57%。

A new antibacterial fluorinated acrylate copolymer hydrophobic film was prepared by inverse micro-emulsion polymerization using dodecafluoroheptyl methacrylate （MBFA-12）, methyl methacrylate （MMA） and 3-allyl-5,5-dimethylhydantion （ ADMH ） as monomers, and docusate sodium （ AOT ） as emulsifier. The chemical structure of the prepared copolymer films were characterized by means of Fourier transform infrared （FT-IR） and nuclear magnetic resonance spectrum （NMR）. Surface hydrophobic properties and chemical composition of copolymer films were characterized by X-ray photoelectron spectra （XPS）, and the effect of fluorinated monomer content on surface properties of copolymer films was mainly discussed. Further, antibacterial experiments of the copolymer films were carried out by using Escherichia coli （E. coli） to investigate the effect of ADMH monomer content on the antibacterial activity of the copolymer. The results showed that with the increasing of MBFA-12 content, both the contact anger of the polymer-air interface and the polymer-glass interface of the copolymer films increased. However, the fluorinated component preferentially enriched at the polymer-air interface, and the contact angle of the polymer-air interface was bigger than that of the polymer-glass interface. The antibacterial activity of the film showed that the introduction of ADMH monomer provided the antibacterial property of the copolymer with the highest killing rate of E. coli up to 90. 57%.