نتایج جستجو برای: tetraethylenepentamine

تعداد نتایج: 89  

2010
Khalid Z. Elwakeel

Chitosan was cross-linked using glutaraldehyde in the presence of magnetite. The resin obtained was chemically modified through the reaction with tetraethylenepentamine followed by glycidyl trimethylammonium chlorid to produce chitosan bearing amine (R1) and chitosan bearing both amine and quaternary ammonium chloride moieties (R2), respectively. The quaternary amine resin (R2) showed a higher ...

Journal: :Tribology Letters 2022

Two water-soluble N-containing additives without sulfur and phosphorus, hexanamide with tetraethylenepentamine (EEHA) benzotriazole amide diethylenetriamine (BTAA), were synthesized used as in the oil-in-water emulsion to investigate effect of amino ring on tribological properties emulsion. The results showed that EEHA/BTAA exhibited wear resistance under all tested conditions. This may be attr...

Journal: :Dalton transactions 2015
Jian Zhou Hong Xiao Hong-Ping Xiao Tao Yang Hua-Hong Zou Xing Liu Rong-Qing Zhao Qiuling Tang

Two types of lanthanide selenidostannates(iv) [Ln2(tepa)2(μ-OH)2Sn2Se6] {Ln = Y(), Pr (), Dy (), Er (), Tm (); tepa = tetraethylenepentamine} and [Ln2(tepa)2(μ2-OH)2Cl2]2[Sn4Se10]·4H2O {Ln = Y (), Dy (), Er (), Tm ()} have been synthesized under identical solvothermal conditions and characterized structurally. Type I (, , , and ) displays 1-D neutral chains [Ln2(tepa)2(μ-OH)2Sn2Se6]n, while typ...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2012
Yun Zhang Shengdong Pan Haoyu Shen Meiqin Hu

An efficient analytical method for the preconcentration and determination of phosphate in water samples at trace levels was proposed. The method was based on sample enrichment using dispersive solid-phase extraction (dSPE) with tetraethylenepentamine (TEPA)-functionalized nano-size composite materials (TEPA-NCMs) as sorbents, which were fully characterized. Various parameters affecting the ex...

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