Preparation, antimicrobial, crystallization and mechanical properties of nano-ZnO-supported zeolite filled polypropylene random copolymer composites
Preparation, antimicrobial, crystallization and mechanical properties of nano-ZnO-supported zeolite filled polypropylene random copolymer composites
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DOI：
10.1016/j.compscitech.2013.03.020
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发表时间：
2013-06
影响因子：
9.1
通讯作者：
Mei-Xian Li;Gu Li;Juan Jiang;Y. Tao;K. Mai
中科院分区：
文献类型：
--
作者：
Mei-Xian Li;Gu Li;Juan Jiang;Y. Tao;K. Mai
为了提高聚丙烯无规共聚物(PPR)的抗菌性能，在沸石颗粒表面负载了纳米氧化锌，并将其用作PPR复合材料的功能填料。用荧光光谱、紫外可见光谱、电感耦合等离子体和扫描电子显微镜对所制备的纳米氧化锌负载沸石颗粒进行了表征。通过差示扫描量热仪、偏光显微镜、抗菌性能和力学性能测试，研究了沸石、氧化锌和纳米氧化锌负载沸石填充PPR复合材料的结晶行为、结晶形态、抗菌性能和力学性能。结果表明，在沸石颗粒表面形成了花状的氧化锌颗粒。沸石和纳米氧化锌负载沸石的非均相成核提高了PPR的结晶温度。纳米氧化锌负载沸石填充PPR复合材料的结晶温度随着纳米氧化锌负载沸石中氧化锌含量的增加而升高。纳米氧化锌负载沸石的加入显著减小了PPR的球晶尺寸。由于纳米氧化锌负载分子筛中的氧化锌呈花朵状，因此纳米氧化锌负载PPR复合材料比直接在PPR中加入相同含量的纳米氧化锌制备的纳米氧化锌填充PPR复合材料对金黄色葡萄球菌和大肠杆菌具有更高的抗菌能力。纳米氧化锌负载沸石含量对PPR复合材料的力学性能影响不大。纳米氧化锌负载沸石作为功能性填料可用于提高PPR的抗菌性能。
In order to increase the antimicrobial functionality of polypropylene random copolymer (PPR), nano-ZnO-supported on the surface of zeolite particles were prepared and used as functional fillers for PPR composites. The prepared nano-ZnO-supported zeolite particles were characterized by fluorescence and UV–Vis spectra, inductive coupled plasma and scanning electron microscopy. The crystallization behavior and crystalline morphology, antimicrobial ability and mechanical properties of zeolite, ZnO and nano-ZnO-supported zeolite filled PPR composites were investigated by differential scanning calorimeter, polarizing optical microscopy, antimicrobial and mechanical testing. The results indicated that the ZnO with flower-like morphology was formed on the surface of zeolite particles. The heterogeneous nucleation of zeolite and nano-ZnO-supported zeolite increase the crystallization temperature of PPR. The crystallization temperatures of nano-ZnO-supported zeolite filled PPR composites increase with increasing ZnO content in the nano-ZnO-supported zeolite. Incorporation of nano-ZnO-supported zeolite significantly decreases the size of spherulites of PPR. The nano-ZnO-supported zeolite filled PPR composites exhibit higher antimicrobial abilities than nano-ZnO filled PPR composite prepared by directly adding the same content of nano-ZnO into PPR matrix for the Staphylococcus aureus and Escherichia coli due to the flower-like morphology of ZnO in the nano-ZnO-supported zeolite. The nano-ZnO-supported zeolite content has little influence on the mechanical properties of PPR composites. nano-ZnO-supported zeolite as functional filler can be used to increase the antimicrobial ability of PPR.