Formation features and AFM studies of the silicon-chitosan-containing glycerohydrogel surface

Scanning Probe Microscopy 2017

Zhuravleva, Yu.Yu.^1 ; Malinkina, O.N.^1 ; Bratashov, D.N.^1 ; Shipovskaya, A.B.^1

Chernyshevsky Saratov State University, Saratov

410012, Russia^1

关键词: Component composition;    Crystallinity degree;    Low molecular weight;    Micro-porous structure;    Morphological features;    Roughness parameters;    Surface irregularities;    Uniform distribution;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/256/1/012011/pdf
DOI  :  10.1088/1757-899X/256/1/012011

来源: IOP

【 摘 要 】

Hybrid glycerohydrogels based on silicon tetraglycerolate and chitosan were produced by means of one-pot sol-gel synthesis. The influence of the component composition (the concentration of the template and precursor), the low-molecular-weight accelerator (NaCl), and the conditions of the process (pH, temperature) on the gelling duration was estimated. The glycerohydrogel surface microrelief was visualized by AFM in the semi-contact mode and the standard roughness parameters were calculated. The silicon-chitosan-containing glycerohydrogels were established to have a complex surface relief. Their solid sol-gel matrix is characterized by a uniform distribution of elements of the inorganic phase and a developed microporous structure with amorphous-crystalline ordering. The scale of the surface irregularities, as well as their structural and morphological features and the crystallinity degree of the solid sol-gel matrix, are determined by the template/precursor weight ratio and the molecular weight of the polymer.