Search academic texts

Information × Registration Number 0212U002440, 0109U001216 , R & D reports Title The structural properties regulation of the hybrid composites at the base of the micro and ultra disperses particles popup.stage_title Head Lebovka Nikolay Ivanovich, Registration Date 27-02-2012 Organization F.D. Ovcharenko Institute of biocolloidal Chemistry NAS of Ukraine popup.description2 Different colloidal systems, such as hybrid composite suspensions filled by nanotubes and organo-modified clay platelets and biological objects were objects of the present project. In this report results of computer simulation of processes of porous deposits formation are presented. The deposits were constructed from the platelets. The calculated diffusion coefficient revealed critical dependence versus the porosity of deposit. Composites of different degree of orientation ordering of filler particles of filler of anisotropic shape were theoretically studied. The anomalous diffusion behavior was observed at high concentration of filler. Hybrid composites on the base of polyethylene glycol (PEG-1000), organo-modified montmorillonite (ОММТ) and multilayered carbon nanotubes (NT) were experimentally studied. Presence of high integration of PEG-1000 in structure OMMT was demonstrated. For these hybrid composites the strong hysteretic behavior in temperature dependencies of electrical conductivity in the vicinity of crystallization-melting phase transitions was observed. It was shown, that filling of PEG-1000 by nanoparticles of PEG-1000 resulted in noticeable growth (two orders of magnitude) of electric conductivities near the concentration of percolation transition ( 0.1 % wt). Impact of different physical and chemical treatments on filtration and consolidation properties bio - suspensions and concentrated suspensions of micro-particles was investigated. The technique of an optimum mode of a dynamic filtration was proposed. It allowed the preparation of suspension of lime carbonate with concentration of a solid phase 80 % and viscosity as low as 1 Pa s from optimum concentration of dispersant (sodium polyacrylate) of 0,5 %. Product Description popup.authors Ар'єв І.А. Бойко Ю.П. Вигорницький М. В. Гігіберія В. А. Гончарук А. І., Логінов М.О. Мельник О.П. Надєл Л.Г Середа К.В. Соловйова O.O. Старченко В.Ю. Шинкарик М.В. popup.nrat_date 2020-04-02 Close