原位合成 FeO@氰乙基纤维素复合材料作为抗菌和半导体薄膜。
In situ synthesis of FeO@ cyanoethyl cellulose composite as antimicrobial and semiconducting film.
机构信息
Cellulose and Paper Department, National Research Centre, 33 El- Bohouth St., Dokki, Giza, 12622, Egypt.
Microwave Physics & Dielectrics Department, National Research Centre, 33 El- Bohouth St., Dokki, Giza, 12622, Egypt.
出版信息
Carbohydr Polym. 2020 May 15;236:116032. doi: 10.1016/j.carbpol.2020.116032. Epub 2020 Feb 18.
Cyanoethyl cellulose (CEC)/ magnetite (FeO) flexible composite film with enhanced dielectric and magnetic properties was successfully prepared. CEC has been synthesized from micro crystalline cellulose (MCC). The effects of magnetite mass fraction on the morphology, microstructure, thermal stability, and antimicrobial activity of the as-prepared composite films were investigated. The Vibrating sample magnetometer (VSM) and broadband dielectric spectrometer was also employed to study the magnetic and dielectric properties, respectively. In addition to study the computational calculation of MCC, and CEC by DFT/ B3LYP/6-31G (d) basis sets. The results showed that, the sample that is magnetite free has a diamagnetic response to the applied magnetic field, however the other samples that is loaded with magnetite show super-paramagnetic behavior indicating that the particles' sizes of the magnetite mostly below 20 nm. Also, antimicrobial activities of composite films against (G + ve), (G-ve), were investigated.
成功制备了具有增强介电和磁性能的氰乙基纤维素（CEC）/磁铁矿（FeO）柔性复合膜。CEC 是由微晶纤维素（MCC）合成的。研究了磁铁矿质量分数对所制备复合膜的形态、微观结构、热稳定性和抗菌活性的影响。还采用振动样品磁强计（VSM）和宽带介电谱仪分别研究了磁性能和介电性能。此外，通过 DFT/B3LYP/6-31G（d）基组对 MCC 和 CEC 进行了计算计算。结果表明，无磁铁矿的样品对施加的磁场表现出反铁磁响应，而负载有磁铁矿的其他样品则表现出超顺磁行为，表明磁铁矿的颗粒尺寸主要小于 20nm。此外，还研究了复合膜对（G+ve）、（G-ve）的抗菌活性。
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