Influence of counter ions on structure, morphology, thermal stability of lanthanide complexes containing dipicolinic acid ligand

A water and organic soluble N-benzyl-N,N-diethyl quaternized chitosan (NSQC) material was synthesized using chitosan, benzaldehyde, and bromoethane. Amino groups on chitosan reacted with benzaldehyde to form a Schiff base intermediate. Quaternized chitosan was obtained by reacting the Schiff base with bromoethane. The quaternized chitosan was dissolved in an organic solution with dissolved cellulose and cast to prepare quaternized chitosan/cellulose (QCC) film. The molecular structure, morphology, tensile strength, thermal stability, and antibacterial activity effects of NSQC-treated cellulose film were studied in detail. The results showed that the NSQC product exhibited superior solubility in deionized water and dimethylacetamide. The addition of NSQC as a reinforcing agent in QCC film enhanced the interlinking of fibers and slowed down the rate of cellulose pyrolysis, which improved the tensile properties and thermal stability of the cellulose film. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values of NSQC showed that it had good antibacterial activity against Staphylococcus aureus and Escherichia coli. The QCC film also showed contact sterilization ability with regards to two kinds of bacteria, which suggested that QCC film has the potential for applications in food packaging and bacterial barriers.

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Effect of Lanthanum Doping on the Microstructure, Thermal Stability, and CO2 Adsorption Property of ZIF-8

Advances in Materials Science and Engineering ◽

10.1155/2019/9734984 ◽

2019 ◽

Vol 2019 ◽

pp. 1-7 ◽

Cited By ~ 2

Author(s):

Sheng Wang ◽

Shengquan Zhang ◽

Xueyan Du ◽

Yingying Shen ◽

Zhiwei Ma

Keyword(s):

Thermal Stability ◽

Adsorption Property ◽

Research Process ◽

X Ray Diffraction ◽

Lanthanum Doping ◽

Microstructure Stability ◽

Structure Morphology ◽

Metal Organic ◽

The Relationship ◽

Thermal Stability Of

The reaction materials La(NO3)3·6H2O, Zn(NO3)2·6H2O, and 2-methylimidazole were mixed in a certain proportion. A research process innovatively adopts the parallel flow-drop solvothermal method and a lanthanum-doping method to achieve the synthesis of metal organic frameworks. In this study, we successfully introduce lanthanum into the framework of ZIF-8 to stabilize the spatial structure and improve its performance. The structure and properties of La-ZIF-8 were characterized by the X-ray diffraction (XRD), scanning electron microscope (SEM), thermogravimetry analysis (TGA), and fourier transform infrared spectroscopy (FTIR). The relationship between microstructure stability and macroscopical properties is illustrated. The results show that the doping of lanthanum is beneficial for improving the thermal stability and CO2 adsorption property of ZIF-8 because of the improvement in the microstructure. The introduction of lanthanum to the ZIF-8 is also beneficial for forming porous frameworks and raising the thermal stability and CO2 adsorption properties. The crystallinity, structure, morphology, and thermal stability of La-ZIF-8 are optimal at the La content of 2 atom.%.

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Structure, morphology and thermal stability of electrochemically obtained Ni–Co deposits

Thermochimica Acta ◽

10.1016/j.tca.2009.07.007 ◽

2009 ◽

Vol 496 (1-2) ◽

pp. 110-116 ◽

Cited By ~ 12

Author(s):

L.D. Rafailović ◽

W. Artner ◽

G.E. Nauer ◽

D.M. Minić

Keyword(s):

Thermal Stability ◽

Structure Morphology ◽

Thermal Stability Of

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