Sinochem News On April 19, a seminar on the development and application of high-end fluorine materials hosted by the China Fluorosilicone 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 polymer technology, polytetrafluoroethylene resin clean production technology, modification technology of fluorine-containing polymer materials, fluorine-containing fine products based on hexafluoropropylene A number of domestic cutting-edge fluorine material-related technologies, including chemical technology, were unveiled in turn, demonstrating the broad development potential of fluorine materials in high-end application fields such as photoresists, semiconductors, and proton exchange membranes.

       "We must promote the transformation of high-end fluorine materials from Made in China to Created in China, China's speed to China's quality, and Chinese products to China's brands." Wu Zhou'an, director of the Fluorine Chemical Expert Committee of the China Fluorosilicone Organic Materials Industry Association, said that my country has proposed to accelerate the construction of With the domestic cycle as the main body and the domestic and international dual cycles reinforcing each other in the new development pattern, the fluorine chemical industry should seize the important opportunity period of the new round of scientific and technological revolution and industrial transformation, promote independent innovation of fluorine materials, and provide technical support for industrial transformation and upgrading.

The team of Shen Jiabin, a researcher at the Polymer Research Institute of Sichuan University, used polyvinylidene fluoride PVDF multi-layer composite technology to produce a product with more than 2,000 layers of micro-nano laminated tube embryos and a regular structure, which is the first of its kind in China. He said: "Polymer molding is not a simple processing of supplied materials, but the science of designing and realizing the structural properties of polymer materials. It is an indispensable key link for high performance and multi-functionality."

Dr. Zhang Panpan of Zhejiang University of Technology said that the team innovatively developed a new synthesis method that solved the problems of the traditional four major synthesis methods, such as easy termination of reactions, uncontrollable molecular weight, many side reactions, few types of polymerized monomers, and harsh reaction conditions. The polymer molecular weight reaches more than 1 million and has excellent mechanical properties of tensile resistance, tear resistance and impact resistance. Using this technology, the Pinghu District Chemical New Materials Park in Jiaxing City has started trial production at the end of 2022 with an annual output of 5,000 tons of methyl methacrylate (PMMA) expanded microspheres Phase I and an annual output of 2,500 tons of PAN porous microspheres Phase II.

"We use the 'gripper' functional group to selectively enrich specific functional groups of special pollutants dispersed in sewage, and at the same time use magnetite powder to quickly separate with a high gradient magnetic field. The removal efficiency of PFAS exceeds 90%, and investment in infrastructure, The operating costs are very low." Regarding the removal of perfluorosulfonic acid (PFAS), Dr. Zou Wei of Sichuan Light Chemical University 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 in detail the synthesis and optimization mechanism of polyperfluoroethylene-propylene (PVDF) and hexafluoropropylene polymers (HFP). Corporate 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 to discuss technology research and development, equipment manufacturing, and application scenarios. They shared their experience in the production of fluorine materials from different aspects, including the synthesis technology routes of ethylene-tetrafluoroethylene copolymer (ETFE) and perfluoropolyether (PFPE) and the manufacturing technology of polymerization reaction equipment, etc.

Many participating experts said that fluorine materials have broad prospects in the fields of photoresist and semiconductors. Materials represented by PFPE also have the advantages of wide temperature and suitable range, energy saving, consumption reduction, and low noise as coolants in digitalization. Regarding the future of fluorine materials, Nie Jun, a professor at Beijing University of Chemical Technology, said that he hopes to hear more demands from enterprises and find practical application scenarios for high-end fluorine materials, so that the technology in the laboratory can move towards engineering amplification and play a greater role. It is continuously optimized and upgraded while functioning.