A copper foil electrodeposition treatment method and composite copper foil material

Abstract

The invention discloses an electrodeposition treatment method of copper foil and a composite copper foil material. The electrodeposition treatment method includes: at least making the copper foil as the cathode, the anode and the electrolyte jointly construct an electrochemical reaction system, wherein the electrolyte includes a mixed solution of cerium nitrate, saturated fatty acid and gluconic acid, and the saturated fatty acid Including myristic acid; then electrifying the electrochemical reaction system for electrodeposition reaction, thereby forming Ce(CH 3 (CH 2 ) 12 COO) 4 Membrane layer; wherein, the electrolyte includes a mixture of cerium nitrate, myristic acid and gluconic acid. Ce(CH prepared by the present invention 3 (CH 2 ) 12 COO) 4 The film layer has the characteristics of large specific surface area and good anti-corrosion and anti-oxidation effect on the surface. At the same time, during the preparation process, the addition of gluconic acid makes the film layer formed on the surface of copper foil more uniform; compared with traditional chemical methods, this process does not contain toxic six Valence chromium has the advantages of fast reaction, uniform deposition effect, simple process, etc. It is a better copper foil surface treatment process.

Description

technical field [0001] The invention belongs to the technical field of copper foil surface treatment, in particular to an electrodeposition treatment method of copper foil and a composite copper foil material. Background technique [0002] In the case of electrolytically generated copper foil without surface protection, its fresh surface is easily oxidized in the air. The copper foil surface treatment process can effectively improve the oxidation resistance of the copper foil, increase the storage time of the copper foil, reduce the requirements for the storage place of the copper foil, and ensure that the quality of the copper foil can meet the standards during use. [0003] The existing copper foil anti-corrosion and anti-oxidation surface treatment process can be divided into two types from the source of raw materials, namely a chromium passivation process and a chromium-free passivation process. Among them, the chromium passivation process is the most widely used becaus...

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Problems solved by technology

Among them, the chromium passivation process is the most widely used because of its good anti-oxidation effect, and the defects that exist at the same time are the most obvious. The raw materials used for chromium passivation are mostly dichromate, and chemical or electrochemical methods are used on the surface of copper foil. Chromium oxide layer is generated. Chromium oxide has good corrosion resistance and high temperature resistance, which can play a good anti-corrosion and anti-oxidation effect. However, the hexavalent chromium ions in dichromate are toxic and carcinogenic. Negative effects on the human body and the surrounding environment during the discharge process

In order to avoid the damage of hexavalent chromium to the environment and human body, and reduce the environmental protection pressure of enterprises, many enterprises have begun to study the passivation process of copper foil without chromium, such as passivation based on tin, phytic acid or chitosan. These processes have more or less defects in some aspects, or they cannot achieve the same level of anti-corrosion and anti-oxidation effects as chromium-containing passivation, or the composition of the formula is too complicated, and it is difficult to combine them in actual production. stable control, or the reaction speed is too slow, it is difficult to meet the needs of rapid passivation treatment of the surface in the actual production of copper foil

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