Adsorption of polyethyleneimine (PEI) on hematite. Influence of magnetic field on adsorption of PEI on hematite

被引：15
作者：
Patkowski, J. [1 ]
Mysliwiec, D. [1 ]
Chibowski, S. [1 ]
机构：
[1] Univ Maria Curie Sklodowska, Fac Chem, Dept Radiochem & Chem Colloids, PL-20031 Lublin, Poland
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2014年 / 144卷 / 03期
关键词：
Interfaces; Polymers; Atomic force microscopy (AFM); Visible and ultraviolet spectrometers; Adsorption; Magnetic properties;
D O I：
10.1016/j.matchemphys.2014.01.019
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A research on influence of magnetic field of various inductions on adsorption of polyethyleneimine (PEI) onto hematite is presented. Properties of the adsorbent surface (Magnetic Force Microscopy images and nitrogen adsorption data) and its behaviour in a water solution (particle size distribution) are also studied. Moreover, new analytical approach is proposed to compare the shape of the isotherms (e.g. presence of plateaus) by calculating a reciprocal derivative. A proposal of adsorption mechanism that explains a multilayer character of the adsorption itself as well as shapes of adsorption isotherms is presented. Changes in the before-mentioned mechanism due to exposure to magnetic field are also explained. Study revealed that in most cases presence of magnetic field decreases an amount of PEI adsorbed and this decrease is not a linear function of magnetic field strength the tendency is reversed for the strongest field investigated (what is consistent with literature data). (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：451 / 461
页数：11
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