Development of Homogeneous Series Charged Membrane
Release time:
2010-05-25
Brief technical description and main technical performance indicators
"Homogeneous series of charged membranes" is a high-tech industrialization promotion project issued by the Shandong Provincial Development Planning Commission to the Shandong Marine Chemical Research Institute, and the National Development Planning Commission has included this project in the national high-tech industrialization promotion project.
Membrane technology is generally regarded as a new type of separation technology with high efficiency and energy saving due to its unique advantages such as high efficiency, practicality, no pollution and simple process. It is an effective means to solve the major problems of energy, resources and environment faced by human beings. Homogeneous membrane is a kind of high-efficiency membrane, which has the advantages of small resistance, low energy consumption, strong selectivity and low production cost. It is widely used in waste acid and alkali recovery, separation of one or two valent ions, salt water purification, pollution control, biochemical engineering and other aspects, and has a huge potential market in China. But the industrial production of the product is still blank. For this reason, we declared and undertook the topic of "homogeneous series of charged membranes" in 1999 on the basis of the success of the small test. After more than two years of hard research, the homogeneous series of charged membranes have been fully completed.
The use of brominated amine crosslinking process for the preparation of homogeneous anion membrane and sulfonated crosslinking process for the preparation of homogeneous cation membrane, a major breakthrough in the manufacturing process, the performance of the product has reached the international indicators of similar products, its process technology and product performance up to the international advanced level.
Main technical performance indicators:
Indicator Name Negative Film Indicator Value Positive Film Indicator Value Unit
Moisture content 42.34 43.68%
Exchange capacity 1.82 1.57 mol/kg (dry)
Film surface resistance 2.7 1.4 Ω.cm2
ion transport number 0.981 0.96
Select transmittance 96.2 92%
Membrane Potential 14.9 - mV
Burst strength> 0.9 >0.7 MPa
Film thickness 0.32~0.34 0.22mm
Promotion and Application Prospect and Measures
Homogeneous series of charged membrane can be widely used in chemical industry, environmental protection, daily chemical industry, metallurgical industry, nuclear industry and other fields, with excellent application prospects, belonging to China's sustainable development strategy should be vigorously promoted high-tech products. According to authoritative estimates, the annual consumption of homogeneous series of charged membranes is more than 300000 square meters. China spends a lot of foreign exchange every year to import homogeneous series of charged membranes. Therefore, the research, development and production of homogeneous series of charged membranes have good prospects for development.
The use of brominated amine crosslinking process for the preparation of homogeneous negative membrane and the use of sulfonated crosslinking process for the preparation of homogeneous positive membrane, a major breakthrough in the manufacturing process, the performance of the product reached the international indicators of similar products, its process technology and product performance reached the international advanced level.
On the basis of pilot research, we will increase the serialization of homogeneous negative film products, applied research and development, and market development efforts to industrialize this high-tech product as soon as possible,In order to meet the market demand for this high-tech products, it has made a significant contribution to the development of China's film industry and related industries.
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