The industry explores the key points of membrane technology research

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for the recently released 'Opinions on Accelerating the development of seawater desalination industry' and 'New material industry'Twelfth Five-Year Plan' The development plan focuses on membrane technology. Industry experts believe that the key to the development of high-performance membrane industry is to master the preparation of high-end raw materials, it also focuses on breaking through the technical development and application promotion of membranes used in the four fields of water treatment, caustic soda, power battery and optical polyester. This is the information obtained by the reporter from the Symposium on the development of high-performance Membrane Industry held by China Membrane Industry Association in Beijing on March 16.

Song Xianzhu, deputy director of the raw material industry department of the Ministry of Industry and Information Technology, said that China's membrane industry has developed rapidly in recent years, however, there are some problems such as weak innovation ability, few product types, small enterprise scale, and dependence on imports of high-end membrane materials. For example, there are no less than 500 enterprises engaged in microfiltration and ultrafiltration in the field of water treatment, but there are less than 10 enterprises with an output value of more than 0. 5 billion yuan, and relevant technical standards are even lacking. The Ministry of Industry and Information Technology, the Ministry of Finance, the National Development and Reform Commission and other departments will support the development of membrane technology in terms of policies and funds in the future.

he proposed that one of the key problems restricting the development of the membrane industry is the supply of raw materials. Polyvinyl chloride, polypropylene, etc. can basically be based in China, while high-performance materials such as polyvinylidene fluoride are largely imported. The preparation of membrane materials requires tackling key problems in raw material treatment, impurity removal, on-line product detection, ultra-thin and composite membrane materials, etc.

professor Zhu Baoku of Zhejiang University and Wu Chen, general manager of Shandong Lanjing Membrane Technology Engineering Co. , Ltd. , proposed to solve the problem of lack of raw materials, first of all, polysulfone, polyethersulfone, polyimide, polyvinylidene fluoride, polyvinyl chloride and other commonly used materials should be distinguished to find out common materials and characteristic materials, and key problems should be organized according to the needs of the industry.

Song Xianzhu pointed out that the next breakthrough in the membrane industry will focus on the use of membranes in four fields: Water Treatment, caustic soda, power batteries and optical polyester. Reverse osmosis membranes for seawater desalination in China are 90% dependent on imports. Domestic membranes need to be improved in terms of membrane module stability, service life and water utilization rate. The annual production capacity of caustic soda in China is 34 million tons, and the ionic membrane method accounts for 86%, but the membranes used are almost entirely imported. At present, the perfluorinated ionic membrane of Dongyue Group has made a breakthrough, and high quality should be improved and its application and promotion should be strengthened. The power lithium ion battery diaphragm is still in the process of breakthrough. Driven by flat panel display and point control touch technology, optical polyester film has developed rapidly. In the future, the development of additives and coating equipment should be strengthened.

Jiang Jian, director of the petrochemical and chemical division of the Raw Materials Department of the Ministry of Industry and Information Technology, said that on the basis of fully understanding the current situation of the industry, the Ministry of Industry and Information Technology will issue 'guidance on the development of high-performance Membrane Industry'. clarify the key points of technology research and development and the direction of industrialization, and focus on solving the problems of weak innovation ability, small enterprise scale and homogeneous competition in the industry.