The Experts below are selected from a list of 51795 Experts worldwide ranked by ideXlab platform
Hao Zhao - One of the best experts on this subject based on the ideXlab platform.
-
Effect of Chelating Agent acetylacetone on corrosion protection properties of silane-zirconium sol-gel coatings
Applied Surface Science, 2016Co-Authors: Mei Yu, Bing Xue, Songmei Li, Min Liang, Jianhua Liu, Hao ZhaoAbstract:The hybrid sol-gel coatings on AA2024-T3 were prepared with a silane coupling Agent 3-glycidoxypropyltrimethoxysilane (GPTMS) and a metal alkoxide tetra-n-propoxyzirconium (TPOZ) as precursors. The effect of acetylacetone (AcAc) as a Chelating Agent on the corrosion protection properties of sol-gel coatings were evaluated and the optimal AcAc/TPOZ molar ratio was obtained. The sol-gel coatings were characterized by atomic force microscopy (AFM), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The corrosion protection properties of the coatings were evaluated by means of potentiodynamic polarization study (PDS) and electrochemical impedance spectroscopy (EIS). It is demonstrated that AcAc avoids fast hydrolysis of TPOZ and benefits to form stable sols. The coating with AcAc/TPOZ molar ratio of 3 shows the best corrosion protection performance in 0.05 M NaCl solution.
Victor Snieckus - One of the best experts on this subject based on the ideXlab platform.
-
a new convenient synthesis of bifunctional Chelating Agent 1 4 aminobenzyl 1 4 8 11 tetraazacyclotetradecane n n n triacetic acid 1 h2nbn teta
Tetrahedron Letters, 1998Co-Authors: Marjorie Maillet, Antoine A. Noujaim, C S Kwok, Victor SnieckusAbstract:A convenient and short synthesis (3 steps, 50% overall yield) of the bifunctional Chelating Agent 1-(4-aminobenzyl)-1,4,8,11-tetraazacyclotetradecane-N′-,N″-,N‴-triacetic acid (4) via a boron-protection strategy is reported.
-
A new convenient synthesis of bifunctional Chelating Agent 1-(4-aminobenzyl)-1,4,8,11-tetraazacyclotetradecane-N′,N″,N‴-triacetic acid [1-(H2NBn-TETA)]
Tetrahedron Letters, 1998Co-Authors: Marjorie Maillet, Antoine A. Noujaim, C S Kwok, Victor SnieckusAbstract:A convenient and short synthesis (3 steps, 50% overall yield) of the bifunctional Chelating Agent 1-(4-aminobenzyl)-1,4,8,11-tetraazacyclotetradecane-N′-,N″-,N‴-triacetic acid (4) via a boron-protection strategy is reported.
Mei Yu - One of the best experts on this subject based on the ideXlab platform.
-
Effect of Chelating Agent acetylacetone on corrosion protection properties of silane-zirconium sol-gel coatings
Applied Surface Science, 2016Co-Authors: Mei Yu, Bing Xue, Songmei Li, Min Liang, Jianhua Liu, Hao ZhaoAbstract:The hybrid sol-gel coatings on AA2024-T3 were prepared with a silane coupling Agent 3-glycidoxypropyltrimethoxysilane (GPTMS) and a metal alkoxide tetra-n-propoxyzirconium (TPOZ) as precursors. The effect of acetylacetone (AcAc) as a Chelating Agent on the corrosion protection properties of sol-gel coatings were evaluated and the optimal AcAc/TPOZ molar ratio was obtained. The sol-gel coatings were characterized by atomic force microscopy (AFM), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The corrosion protection properties of the coatings were evaluated by means of potentiodynamic polarization study (PDS) and electrochemical impedance spectroscopy (EIS). It is demonstrated that AcAc avoids fast hydrolysis of TPOZ and benefits to form stable sols. The coating with AcAc/TPOZ molar ratio of 3 shows the best corrosion protection performance in 0.05 M NaCl solution.
Jianfeng Huang - One of the best experts on this subject based on the ideXlab platform.
-
preparation of gas sensing cotio3 nanocrystallites using edta as the Chelating Agent in a sol gel process
Ceramics International, 2015Co-Authors: Yucheng Jiang, Yabin Zhang, Jianfeng HuangAbstract:Abstract CoTiO 3 nanocrystallites with an average diameter of 40 nm were prepared by the sol–gel method using C 10 H 16 N 2 O 8 (EDTA) as the Chelating Agent. The thermal decomposition process and chemical bonding of the precursor were studied by thermogravimetric-differential scanning calorimetry and fourier transform infrared spectra, respectively. The as-prepared nanocrystallites were characterized by X-ray diffraction, field-emission scanning electron microscopy and transmission electron microscopy. The effects of calcination temperature, sol pH and Chelating Agent on the formation of CoTiO 3 were investigated. The results show that calcination temperature is a key factor controlling the composition of the products. Acid sol is the optimum condition for hydrolysis and polycondensation of Ti(OC 4 H 9 ) 4 . Co 2+ and Ti 4+ were bonded together by EDTA, and pure CoTiO 3 nanocrystallites were obtained due to this Chelating effect. The Chelating mechanism and the formation process of CoTiO 3 in the sol–gel process were proposed. Furthermore, the nano-CoTiO 3 was applied to make a gas sensor, and the response value to 104 ppm ethanol was 17.9, response time and the recovery time were 13 s and 10 s, respectively.
Marjorie Maillet - One of the best experts on this subject based on the ideXlab platform.
-
a new convenient synthesis of bifunctional Chelating Agent 1 4 aminobenzyl 1 4 8 11 tetraazacyclotetradecane n n n triacetic acid 1 h2nbn teta
Tetrahedron Letters, 1998Co-Authors: Marjorie Maillet, Antoine A. Noujaim, C S Kwok, Victor SnieckusAbstract:A convenient and short synthesis (3 steps, 50% overall yield) of the bifunctional Chelating Agent 1-(4-aminobenzyl)-1,4,8,11-tetraazacyclotetradecane-N′-,N″-,N‴-triacetic acid (4) via a boron-protection strategy is reported.
-
A new convenient synthesis of bifunctional Chelating Agent 1-(4-aminobenzyl)-1,4,8,11-tetraazacyclotetradecane-N′,N″,N‴-triacetic acid [1-(H2NBn-TETA)]
Tetrahedron Letters, 1998Co-Authors: Marjorie Maillet, Antoine A. Noujaim, C S Kwok, Victor SnieckusAbstract:A convenient and short synthesis (3 steps, 50% overall yield) of the bifunctional Chelating Agent 1-(4-aminobenzyl)-1,4,8,11-tetraazacyclotetradecane-N′-,N″-,N‴-triacetic acid (4) via a boron-protection strategy is reported.
