On April 19, a seminar on the development and application of high-end fluorine materials sponsored by China Fluoro-Silicon Organic Materials Industry Association was held in Zigong. Processing molding and modification technology of high-performance fluorine membrane materials, precious metal catalyzed synthesis of fluorine-containing high polymer technology, clean production technology of polytetrafluoroethylene resin, modification technology of fluorine-containing polymer materials, fluorine-containing fine film based on hexafluoropropylene A number of domestic cutting-edge fluorine material-related technologies such as chemical technology were unveiled in turn, showing that fluorine materials have broad development potential in high-end application fields such as photoresists, semiconductors, and proton exchange membranes.
"We want to promote the transformation of high-end fluorine materials from made in China to created in China, from Chinese speed to Chinese quality, and from Chinese products to Chinese brands." Wu Zhouan, director of the Fluorochemical Expert Committee of China Fluoro-Silicon Organic Materials Industry Association, said that my country proposed Accelerate the construction of a new development pattern with the domestic big cycle as the main body and the domestic and international double cycles mutually promoting each other. The fluorine chemical industry should seize the important opportunity period of the new round of technological revolution and industrial transformation, promote independent innovation of fluorine materials, and provide new resources for industrial transformation and upgrading. Technical support,
The team of Shen Jiabin, a researcher at the Institute of Polymer Research, Sichuan University, used polyvinylidene fluoride PVDF multilayer composite technology to produce a product with more than 2,000 layers of micro-nano laminated tube embryos, and the structure is regular, which is the first in China. He said: "Polymer molding is not a simple processing of incoming materials, but the science of designing and realizing the structural properties of polymer materials, which is an indispensable key link for high performance and multifunctionality."
Dr. Zhang Panpan from Zhejiang University of Technology said that the team innovated and developed a new synthetic method, which solved the problem of uncontrollable molecular weight, many side reactions, few types of polymerized monomers, and harsh reaction conditions caused by the easy termination of the four traditional synthetic methods. And other problems, the molecular weight of the polymer reaches more than 1 million, and it has excellent mechanical properties of tensile resistance, tear resistance and impact resistance. The Phase I of expanded microspheres with an annual output of 5,000 tons of methyl methacrylate (PMMA) and the Phase II of PAN porous microspheres with an annual output of 2,500 tons in the New Chemical Materials Park in Pinghu District, Jiaxing City, using this technology, will be put into trial production at the end of 2023.
"We use the 'grab' functional group to selectively enrich the specific functional groups of special pollutants dispersed in sewage, and at the same time use magnetite powder high-gradient magnetic field to quickly separate, the removal efficiency of PFAS exceeds 90%, and The infrastructure investment and operating costs are very low." Regarding the removal of perfluorosulfonic acid (PFAS), Dr. Zou Wei from Sichuan University of Light and Chemical Technology introduced. In addition, he and his team also realized the use of non-toxic green organic solvents to remove emulsifiers from wastewater, with a recovery rate of more than 95%, wastewater COD less than 3000mg/L, and good biodegradability.
Professor Li Yongjin of Hangzhou Normal University and Professor Zhou Lu of Nanjing University of Science and Technology introduced the synthesis and optimization mechanism of polyperfluoroethylene propylene (PVDF) and hexafluoropropylene polymer (HFP) in detail. Enterprise experts from the Research Institute of Shandong Dongyue Polymer Materials Co., Ltd., Chengdu Chenguang Boda New Materials Co., Ltd., and Zhejiang Quzhou Xinju Fluorine Materials Co., Ltd. also combined their own production actualities, respectively, from technology research and development, equipment manufacturing, and application scenarios. They shared their experience in the production of fluorine materials, including the synthesis technology route of ethylene-tetrafluoroethylene copolymer (ETFE), perfluoropolyether (PFPE) and the manufacturing technology of polymerization reaction equipment.
A number of participating experts said that fluorine materials have broad prospects in the fields of photoresists and semiconductors, and materials represented by PFPE as cooling fluids also have the advantages of wide temperature range, energy saving, low noise and other advantages in digitalization. Regarding the future of fluorine materials, Nie Jun, a professor at Beijing University of Chemical Technology, proposed that he hopes to hear more demands from enterprises, find out the practical application scenarios of high-end fluorine materials, and let the technology in the laboratory move towards engineering amplification, so as to play a greater role. Continuously optimize and upgrade while functioning. (Zhao Xinjie)
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