Studies of the influence of nonequilibrium plasma thermal exposure on the characteristics of the capillary-porous polymer material

8th All-Russian Conference on Low Temperature Plasma in the Processes of Functional Coating Preparation

Makhotkina, L. Yu^1 ; Khristoliubova, V.I.^1

Kazan National Research Technological University, 68 Karl Marks st., Kazan

420015, Russia^1

关键词: Collagen degradations;    Effect of temperature;    Heating temperatures;    Low temperature plasmas;    Materials and products;    Nonequilibrium plasmas;    Physical and mechanical properties;    Porous polymer material;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/789/1/012032/pdf
DOI  :  10.1088/1742-6596/789/1/012032

来源: IOP

【 摘 要 】

Capillary-porous materials, which include natural macromolecular tanning material, are exposed to a number of factors during the treatment by a nonequilibrium plasma. Plasma particles exchange the charge and energy with the atoms of the material during the interaction of the plasma with the surface. The results of treatment are desorption of atoms and molecules from the body surface, sputtering and evaporation of material's particles, changes of the structure and phase state. In real terms during the modification of solids by nonequilibrium low-temperature plasma thermal effect influences the process. The energy supplied from the discharge during the process with low pressure, which is converted into heat, is significantly less than during the atmospheric pressure, but the thermal stability of high-molecular compounds used in the manufacture of materials and products of the tanning industry, is very limited and depends on the duration of the effect of temperature. Even short heating of hydrophilic polymers (proteins) (100-180 °C) causes a change in their properties. It decreases the collagen ability to absorb water vapor, to swell in water, acids, alkalis, and thus decreases their durability. Prolonged heating leads to a deterioration of the physical and mechanical properties. Higher heating temperatures it leads to the polymer degradation. The natural leather temperature during plasma exposure does not rise to a temperature of collagen degradation and does not result in changes of physical phase of the dermis. However, the thermal plasma exposure must be considered, since the high temperatures influence on physical and mechanical properties.