Computer simulation and optimization of the composition of the hydrophobising mixture
Abstract
Scientifically based determination of the optimal qualitative and quantitative composition of the hydrophobizing mixture to ensure increased water resistance of leather and fur materials is relevant. The article is devoted to computer simulation and optimization of the composition of the hydrophobizing mixture based on C20-24 alkenes polymerized with maleic anhydride. Statement of the problem. Scientifically based determination of the optimal qualitative and quantitative composition of the mixture to ensure increased water resistance of leather and fur materials is relevant. Analysis of recent research and publications. The analysis of scientific and technical literature indicates the use of a wide range of reagents and materials of different chemical composition, in particular, derivatives of fatty and oxycarboxylic acids, organosilicon compounds of solid hydrocarbons in the technology of forming leather and fur materials and products, with most recommendations in this field based on empirical principles. The purpose of the article. The purpose of this study is to establish the optimal composition of the hydrophobizing composition based on alkenmaleic polymer for fur velor using computer modeling and optimization. Presentation of the main material. The hydrophobizing mixture is intended to improve the operational characteristics of natural polymers, in particular, fur velour obtained from semi-fine-wooled sheepskins. During the research, the methods of experimental and statistical simulation and mathematical programming were used to find the optimal composition of the filler-hydrophobic mixture. The stage of experimental and statistical simulation included, in particular, D-optimal simplex-lattice experimental design with restrictions on the composition of components, which was synthesized by the original procedure as well as parametric identification of the model and analysis of variances. At the stage of optimization based on the nonlinear multifactor and multiobjective optimization model the classical multiplicative convolution method as well as convolution by the Harrington desirability function-based approach, and also the hierarchical method of successive concessions were used to determine the optimal composition of the hydrophobizing mixture. Results. As a result of research, the optimal composition of the filler-hydrophobizing mixture containing C18–22 maleic acid ester, C5–7 light fraction paraffins, ethyl cellosolve, propanol, water, and urea (in the 0.3163 : 0.0770 : 0. 0663 : 0.0354 : 0.475 : 0.03 ratio) was proposed. Conclusion. The optimized composition of the filler-hydrophobic mixture can be successfully used in the production technologies of sheepskin and leather materials with increased water resistance. According to the totality of its properties, the hydrophobized velour obtained using the mixture is suitable for the production of clothing for various purposes, which is used in extreme conditions
Keywords
fur velour; filling; hydrophobization; experiment planning; synthesis of the experiment plan; mathematical model; multi-criteria optimization
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