Preparation method of wear-resistant ultrahydrophobic flame-retarding leather

Abstract

The invention discloses a preparation method of wear-resistant ultrahydrophobic flame-retarding leather. The method includes the steps of: performing suction filtration to an anhydrous ethanol dispersion liquid of a carbon material, a solution containing vegetable tannin, and a solution containing a metal compound in certain order onto leather which has been washed and dried, then soaking the leather having a micron-nano rough structure in a solution containing a low surface energy substance to modify the leather. According to the method, through the suction filtration, the vegetable tannin and metal ions, which are adhered to outside the carbon material on leather collagen fiber, are subjected to in-situ complexing reaction to form a binder, so that the carbon material stably coats and isfixed to the surface of the leather collagen fiber. The leather material has excellent surface mechanical strength; under wearing by external force, the leather collagen fiber is effectively coated and protected by the carbon material, so that the leather has wear-resistant and ultrahydrophobic performance and is further improved in flame retarding property. The method is simple in process, is short in preparation period, is low in energy consumption and is easy to carry out in large scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of preparation of superhydrophobic materials, and in particular relates to a method for preparing wear-resistant superhydrophobic flame-retardant leather by modifying leather by utilizing nanotechnology and surface modification technology. Background technique [0002] Leather is not only soft, breathable, wear-resistant, high-strength, but also has high moisture absorption and water vapor permeability, which is favored by many people. However, its hydrophobicity is poor, and it is very difficult to store it in a humid environment for a long time or after it is stained with water. It is easy to harden or deform or be corroded by bacteria. Therefore, it is necessary to modify the leather surface with superhydrophobic modification. [0003] In recent years, although a lot of achievements have been made in theoretical research on superhydrophobic surfaces [Cui Xiaosong, Yao Xi, Liu Haihua, et al. Design and pre...

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Problems solved by technology

[0002] Leather is not only soft, breathable, wear-resistant, high-strength, but also has high moisture absorption and water vapor permeability, which is favored by many people. However, its hydrophobicity is poor, and it is very difficult to store it in a humid environment for a long time or after it is stained with water. Easy to harden or deform or be attacked by bacteria, therefore, it is necessary to modify the surface of the leather with superhydrophobic

[0003] In recent years, although a lot of achievements have been made in theoretical research on superhydrophobic surfaces [Cui Xiaosong, Yao Xi, Liu Haihua, et al. Design and preparation of micro-nano structures on superhydrophobic surfaces and regulation of wetting behavior [J].Materials Progress,2009,28(12):41-52; Gong Yuqing.The application prospect of superhydrophobic coating in anti-icing[J].Enterprise Technology Development,2009,28:82-83;Zhang Xiaoyan. Research on the construction of superhydrophobic leather coating [D]. Shaanxi University of Science and Technology, 2015.], but on the one hand, there are not many preparation methods disclosed, and most of the preparation methods still have problems such as harsh experimental conditions, cumbersome steps, and high cost. On the one hand, the superhydrophobic materials that have been put into the market or disclosed by research also have shortcomings such as low surface microstructure strength, easy aging, easy wear, easy pollution, and short service life (Guo Chunfang "Material Research and Application" September 2010 Volume 4 Issue 3)

For example, superhydrophobic surfaces are prepared by constructing micro-nano rough structures and reducing surface energy (Mohamed A M A, Abdullah A M, Younan N A. Corrosion behavior of superhydrophobic surfaces: A review[J]. Arabian Journal of Chemistry, 2015, 8( 6): 749-765.), although the use of nanoparticles to construct a rough structure on the surface of the substrate material can achieve the required roughness of the superhydrophobic material, but the superhydrophobic material prepared by this method is subject to the impact of external force or When rubbing, the micro-nano rough structure on the surface is prone to structural damage under the action of pressure and shear force, resulting in the failure of superhydrophobic properties

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