After more than 50 years of development, China's membrane industry has gradually matured. In the past 15 years, China's membrane industry has experienced rapid growth, with the total output value increasing from 200 million yuan in 1993 to 20 billion yuan in 2008 (the total output value of the membrane industry refers to the total value of membrane products, membrane components, membrane ancillary equipment and related engineering, and membrane products and membrane components are the core of the entire industry) [1-2]. According to the development trend of the Chinese membrane market in the past 15 years (Figure 1), it is expected that the demand for the Chinese membrane market will reach 24 billion yuan in 2009, and the application prospects of membrane technology are very broad. In 1999, the total output value of the global membrane industry was around 20 billion US dollars, while the total output value of China's membrane industry was about 2.8 billion yuan that year, accounting for only 1% of the global total output value. By 2007, the total output value of the global membrane industry had reached around 36 billion US dollars, of which the market for membrane products and components was 8.3 billion US dollars. By comparison, the total output value of China's membrane industry reached 17 billion yuan that year, and the market for membrane products and components was about 5 billion yuan. The international market share increased by 6% to 8%. 1. Research Environment Analysis: China's membrane technology started later than developed countries. In order to promote the rapid development of China's membrane technology and shorten the gap with the advanced level of foreign countries as soon as possible.
