A kind of preparation method and application method of graphene oxide-based leather finishing agent

Abstract

The invention relates to the technical field of tanning chemistry and engineering, and provides a preparation method and an application method of a graphene oxide-based leather finishing agent. Graphene oxide is used in the preparation method of the graphene oxide-based leather finishing agent. Graphene oxide has oxygen-containing groups, has good water solubility and reactivity, and can be combined with hydroxyl groups, carboxyl groups or amino groups in polyacrylates and polyurethane resins. React or combine with the hydroxyl group, carboxyl group or amino group of leather collagen fiber, it is not easy to fall off, graphene oxide uses polyacrylate, polyurethane resin as the carrier, can prepare the leather finishing agent of stable homogeneous system; Apply the obtained leather finishing agent on the leather On the surface, as the moisture in the finishing agent gradually volatilizes, the finishing agent forms a uniform film on the leather surface, thereby improving the performance of the leather coating.

Description

technical field [0001] The invention relates to the technical field of tanning chemistry and engineering, in particular to a preparation method and application method of a graphene oxide-based leather finishing agent. Background technique [0002] Leather finishing is a very important process in the leather manufacturing process. Unpainted leather has a rough feel and is easy to be damaged. After finishing, a thin film is formed on the leather surface, which feels smooth and has a certain strength and is not easy to damage. Due to the limitation of leather chemicals, currently widely used leather products have technical defects such as poor coating strength, wear resistance, and aging resistance. This situation seriously restricts the competitiveness of my country's leather products in the international market. The research and development of high-performance key technologies of products and the use of high-tech to transform the traditional leather industry are the key to imp...

AI Technical Summary

Problems solved by technology

[0004] 1. In the existing method, graphene uses ethylene glycol ether as a dispersion medium, and ethylene glycol ether is an organic solvent, which will produce VOC, which is harmful to human health and does not meet the needs of environmental protection leather; and graphene has a reactive nature. Technical defect, it is difficult to react with leather finishing agent components or leather collagen fibers, as ethylene glycol ether gradually volatilizes, graphene will aggregate and deposit on the leather surface, the distribution is uneven, and it is easy to peel off, showing different parts of the leather surface The defect of different coating wear resistance reduces the film-forming stability of the coating agent and reduces the practical effect of coating; the prepared coating agent is a heterogeneous system with poor stability and cannot be stored;

[0005] 2. The leather finishing agent is a multi-component mixture, including polyacrylate, polyurethane resin and other non-resin components. In the existing method, the graphene dispersion is directly added and mixed with the leather finishing agent, which will cause graphene to be mixed with the leather finishing agent. The phenomenon of adsorption of polyacrylate and polyurethane resin, and adsorption with non-resin components, while the wear resistance of the coating mainly depends on the properties of polyacrylate and polyurethane resin in leather finishing agents, and the graphene adsorbed on non-resin components Failure to play an effective role, resulting in low effective utilization of graphene, increased production costs and other production problems