纳米ZnO/生物基尼龙612纳米复合抗菌薄膜的制备与性能  

Preparation and properties of nano-ZnO/bio-based nylon 612 nano-composite antibacterial film

作　　者：李霞 刘跃军[1] 刘小超[1] 江南[1] 王雄刚 莫智翔 胡钰迪 郑伟 LI Xia;LIU Yuejun;LIU Xiaochao;JIANG Nan;WANG Xionggang;MO Zhixiang;HU Yudi;ZHENG Wei(Hunan Provincial Key Laboratory of Advanced Packaging Materials and Technology,Hunan University of Technology,Zhuzhou 412007,China;Xiamen Changsu Industrial CO.,LTD.,Xiamen 361026,China)

机构地区：[1]湖南工业大学先进包装材料与技术湖南省重点实验室,株洲412007 [2]厦门长塑实业有限公司,厦门361026

出　　处：《复合材料学报》2023年第1期437-446,共10页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(11872179);湖南省自然科学基金(2020JJ5137);湖南省教育厅科学研究项目(19A138,19B152)。

摘　　要：细菌滋生将缩短食品货架周期,对人体健康产生负面影响,因此开展抗菌包装膜的研究十分重要。本文采用γ-氨丙基三乙氧基硅烷偶联剂(KH550)改性了纳米氧化锌(ZnO),并将改性后的纳米氧化锌(m-ZnO)与尼龙612(PA612)进行熔融共混制备复合材料,最终采用挤出流延制备了m-ZnO/PA612纳米复合抗菌薄膜。采用FTIR对改性前后的ZnO进行表征,证明了KH550成功接枝到ZnO上。通过SEM、DSC、TGA、平板计数法等测试手段对ZnO的分散及复合材料的结晶性能、热性能、抗菌性能进行了研究。结果表明:m-ZnO在PA612基体中分散良好。m-ZnO可以作为成核剂提高PA612的结晶度,m-ZnO的含量为2wt%时,其结晶度提高了4.1%。m-ZnO对PA612有增强作用,m-ZnO的添加量为2wt%时,m-ZnO/PA612纳米复合薄膜的拉伸强度较纯PA612提高了15%。m-ZnO的存在赋予了PA612抗菌性能,m-ZnO/PA612纳米复合薄膜对大肠杆菌和金黄色葡萄球菌均有很好的抗菌效果,且随着m-ZnO含量的增大,抗菌率增大,m-ZnO的质量分数为4wt%时,对大肠杆菌的抗菌率为93.25%,对金黄色葡萄球菌的抗菌率为91.03%。Bacterial growth can shorten the shelf life of food and exert a negative effect on human health,therefore it is of great importance to conduct research on anti-bacterial films.Herein,theγ-aminopropyltriethoxysilane coupling agent(KH550)was used to modify nano-zinc oxide,and the modified nano-zinc oxide(m-ZnO)was meltblended with nylon 612(PA612)to prepare m-ZnO/PA612 nanocomposite,followed by the fabrication of the antibacterial film through extrusion film casting process.The FTIR was used to characterize the nano-zinc oxide before and after the modification,which proved that KH550 was successfully grafted onto the nano-zinc oxide.Through SEM,DSC,TGA,plate counting method,and other test methods,the dispersibility of nano-zinc oxide and the crystallization performance,thermal performance,and antibacterial properties of composite materials were studied.The results show that the m-ZnO is well dispersed in the PA612 matrix.The m-ZnO can be used as a nucleating agent to increase the crystallinity of PA612.When the content of m-ZnO is 2wt%,the crystallinity is increased by 4.1%.Moreover,the m-ZnO exhibits a reinforcing effect on PA612.When the addition amount of m-ZnO is 2wt%,the tensile strength of the m-ZnO/PA612 nanocomposite film is 15%higher than that of pure PA612.The presence of m-ZnO gives PA612 antibacterial properties.m-ZnO/PA612 nanocomposite film has a good inhibitory effect on Escherichia coli and Staphylococcus aureus.With the increase of m-ZnO content,the antibacterial rate increases,when the mass fraction of m-ZnO is 4wt%,the antibacterial rate against Escherichia coli is 93.25%,and the antibacterial rate against Staphylococcus aureus is 91.03%.

关 键 词：尼龙612 Γ-氨丙基三乙氧基硅烷 纳米氧化锌 抗菌 纳米复合薄膜 

分 类 号：TB332[一般工业技术—材料科学与工程]