摘要
利用Fe^3+引发吡咯(Py)在层状双羟基金属氧化物(LDHs)表面发生氧化反应,形成聚吡咯(PPy)包覆LDHs(LDHs@PPy);以LDHs@PPy和聚己内酯(PCL)为原料,采用溶液浇筑方法制备LDHs@PPy/PCL纳米复合薄膜.研究结果表明,LDHs@PPy对大肠杆菌和金黄色葡萄球菌的抗菌率均达到99.7%,其与基材PCL界面相容性良好,而且在基材中还具有异相成核作用.当LDHs@PPy的质量分数仅为1%时,LDHs@PPy/PCL纳米复合材料的拉伸强度和断裂伸长率分别增加35%和23%,氧气渗透性降低幅度达到56%,对大肠杆菌和金黄色葡萄球菌的抗菌率均超过99.99%,表现出良好的抗菌活性,拓展了层状黏土/生物基高分子复合材料在活性包装领域的应用.
Polypyrrole-coated layered double hydroxides(LDHs @ PPy) was prepared by the chemical oxidation polymerization of pyrrole(Py) on the surface of LDHs induced by Fe3+. And LDHs @ PPy/poly(ε-caprolactone)(PCL) nanocomposites were prepared by blending LDHs@PPy and pure PCL via solution casting method to obtain homogeneous films. The results showed that LDHs@PPy was prepared with an antibacterial rate of 99. 7%(for Escherichia coli and Staphylococcus aureus). It had a good interface compatibility with the PCL matrix and played a role of heterogeneous nucleation in the PCL matrix. When the mass fraction of LDHs@ PPy was only 1%,the tensile strength and elongation at break of nanocomposites increased by35% and 23%,respectively. And the oxygen permeability also decreased by 56%. It was worth mentioning that the antibacterial rate of the nanocomposites was over 99. 99%(for Escherichia coli and Staphylococcus aureus),which showed good antibacterial activity. The work promotes the application of layered clay/biopolymer nanocomposites in the field of active packaging.
作者
毛龙
刘跃军
范淑红
MAO Long;LIU Yuejun;FAN Shuhong(Fujian Provincial Key Laboratory of Functional Materials and Applications,Xiamen University of Technology,Xiamen 361024,China;Key Laboratory of Advanced Packaging Materials and Technology of Hunan Province,Hunan University of Technology,Zhuzhou 412007,China)
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2019年第8期1726-1732,共7页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:11872179)
福建省科技计划项目(批准号:2018H6024)
湖南省自然科学基金(批准号:2019JJ50132)
湖南省高校创新平台开放基金(批准号:18K079)
福建省功能材料及应用重点实验室开放课题(厦门理工学院)(批准号:fma2018004,fma2017110)资助~~
关键词
层状黏土
表面改性
纳米复合材料
阻隔性能
抗菌活性
层状双羟基金属氧化物
聚吡咯
聚己内酯
Layered clay
Surface modification
Nanocomposites
Barrier property
Antibacterial activity
Layered double hydroxides
Polypyrrol
Poly( ε -eaprolactone)
