Research of consumer properties of leather filled with the use of electroactivated water reagent solutions
DOI:
https://doi.org/10.15587/1729-4061.2016.73337Keywords:
semifinished leather, filling, activated water, xanthan acrylamide, porosity, hydrophilic ability, elasticityAbstract
Consumer properties of the filled macroporous chrometanned semifinished leather obtained by the developed technology using electrochemically activated aqueous solutions of the composition comprising xanthan acrylamide were studied. Sorptiondesorption properties of different sections of the filled material during its interaction with water, relaxation and deformation characteristics, differential moisture content on a thermogravicaloriemetric installation, volume yield were determined.
It was found that the leather material obtained by the developed technology has higher elastic and plastic strain components by 1.7 and 1.3 times respectively compared with the current technology; porosity, volume yield and hygroscopic ability of obtained samples exceed those of the samples of the experimental technology by 4.5; 19.0; and 9.8–11.3 % respectively. The technology of filling of chrometanned leather material from pig skin is implemented by diffusion of the composition ingredients in the anolyte solution at pH 4.2–4.4 with the reduction of surface tension, the formation of mostly hydrogen bonds between the elements of the modified structure of collagen and the filler reagents. The interaction with water results in partial destruction of bonds that are restored after moisture removal. Optimum consumer properties are achieved at a certain ratio of the hydrophilic ability and the differential porosity type of the leather material.
The use of the filling composition involving xanthan acrylamide in the anolyte provides effective alignment of porosity in different sections of the semifinished product due to preferred filling of large pores and increase in the specific volume of smaller pores with the composition. The resulting finepored leather material with the split fibrillar structure causes a smaller loss of its area by 0.3 % after moisturizing and drying processes compared with the current technology.
The leather material formed using the developed technology due to the complex of consumer properties is recommended for making the insides of shoes – insoles and lining and moisture removal material in the mechanical surface cleaning of products and structures.References
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