The stumbling block of magnetic graphene industrialization has been solved

    The newly developed intelligent preparation platform realizes automatic control and management. The entire production process does not discharge waste liquid and waste residue. The synthesized powder has high purity, does not require secondary purification steps, and the utilization rate of raw materials is close to 100%.

    Graphene materials and their composite materials are national strategic industries, which have penetrated into various fields of national economy, national defense construction and social life. As a popular cutting-edge material in the world, my country's graphene material is on the starting line of large-scale industrialization.

    A reporter from Science and Technology Daily learned from the Science and Technology Bureau of Chifeng City, Inner Mongolia on May 7 that a magnetic graphene prepared with an independent new technology has entered the industrialization development stage with the support of the Inner Mongolia Science and Technology Achievement Transformation Project. The project adopts an efficient and controllable preparation method to synthesize new materials, which breaks through the technical bottleneck of industrialized preparation of high-performance magnetic graphene composite materials and fills the gap in the industrial production of magnetic graphene in my country.

    New technology makes graphene magnetic

    With the development of science and technology and the expansion of market demand, the existing graphene materials on the market have been unable to meet the needs of some fields, and some emerging graphene composite materials need to be developed urgently.

    "The key and difficulty in the industrialization of new graphene materials is the preparation and transfer technology of related materials." Introduced by Li Shuangjun, deputy general manager of Inner Mongolia Yuanci New Materials Technology Co., Ltd. (hereinafter referred to as Yuanci New Materials), the undertaking unit of the magnetic graphene project. , In 2016, the enterprise R&D team and the School of Chemical Engineering and Chemistry of Harbin Institute of Technology began to cooperate closely to jointly develop the preparation process of magnetic graphene.

    Through innovations in materials, properties and production processes, the R&D team makes magnetic particles loaded on the surface of graphene, creating a multi-functional composite material with graphene as the matrix that integrates magnetic and electrical properties.

    "Magnetic particles are loaded on the surface of graphene to realize the controllable assembly and close combination of two different functional components to form an integrated functional composite material. On the basis of exerting their respective functions, they complement each other and create a graphene-based composite material. The magnetic material of the matrix." Li Shuangjun told reporters that magnetic graphene has won the first batch of new materials certification in Inner Mongolia Autonomous Region in 2020, and is expected to play a broad application prospect in the fields of electromagnetic shielding and electromagnetic wave modulation, national defense and military industry, and new energy applications.

    The preparation process realizes the green and high yield of materials

    According to Li Shuangjun, there are two traditional ways to obtain magnetic graphene materials. One is to physically mix magnetic materials such as iron, cobalt, and nickel with carbon materials. The composite materials produced by this physical mixing method are easy to occur. Separation does not work as expected. The other is chemically prepared by cracking and compounding various raw materials in organic solvents. The product is formed in the liquid phase, which requires multiple washings and complex separation steps to complete, which causes huge pressure on environmental protection and resource utilization.

    In order to overcome the shortcomings of the above processes, the R&D team has continuously optimized the process technology and innovatively developed a magnetic graphene industrial production and preparation platform. The magnetic graphene material produced by this preparation platform has reached the domestic leading level in terms of size, parameter index, production reliability and stability.

    It is understood that the intelligent preparation platform realizes automatic control and management in the production process. The whole process does not discharge waste liquid and waste residue. The synthesized powder has high purity, does not require secondary purification steps, and the utilization rate of raw materials is close to 100%.

    In 2019, Yuanci New Materials undertook the "Industrialization Construction of Magnetic Graphene Materials" for the transformation project of scientific and technological achievements in the autonomous region. On the basis of improving the magnetic graphene production line, the project team further optimizes the process, and the next step is to achieve the pilot test target of 10 tons per year. Li Shuangjun said that since the basic research of magnetic graphene materials in my country has developed rapidly but the industrialization has not developed synchronously, it is of positive significance to promote the industrial production of magnetic graphene.

    The "Industrialization Construction of Magnetic Graphene Materials" project solves application problems in many fields such as electromagnetic protection, water and soil pollution control, new energy batteries, energy storage devices, etc. Connected new infrastructure. The breakthrough of this technology makes it possible for the industrialization of magnetic graphene materials in my country, which will break the monopoly of foreign magnetic graphene-related industrialization technologies and greatly improve the international market competitiveness of my country's graphene products.