Polyvinylidene fluoride (PVDF) hydrophilic modified membrane and preparation method thereof
A polyvinylidene fluoride and water bath technology, applied in the field of polyvinylidene fluoride hydrophilic modified membrane and its preparation, can solve the problems of high C-F bond energy, complex modification process, low activity, etc. The effect of water and stain resistance
Inactive Publication Date: 2013-04-17
TIANJIN POLYTECHNIC UNIV
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Problems solved by technology
However, the C-F bond energy of PVDF is relatively high and difficult to break, so its ATRP initiation activity is relatively low
In many cases, people introduce more active Br end groups on the surface of PVDF membranes through chemical reactions, and then carry out ATRP grafting reactions, which makes the modification process complicated and difficult to operate.
Method used
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Embodiment 1
[0032] The polyvinylidene fluoride modified functional film is grafted with poly-2-(dimethylamino)ethyl methacrylate on the surface of the polyvinylidene fluoride film by means of water-phase atom transfer radical polymerization.
Embodiment 2
[0034] Polyvinylidene fluoride modified functional film, which is grafted with poly-2-(diisopropylamino) ethyl methacrylate on the surface of polyvinylidene fluoride film by the method of water-phase atom transfer radical polymerization .
Embodiment 3
[0036] The polyvinylidene fluoride modified functional film is grafted with poly-2-(diethylamino)ethyl methacrylate on the surface of the polyvinylidene fluoride film through the method of water-phase atom transfer radical polymerization.
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The invention discloses a polyvinylidene fluoride (PVDF) modified functional membrane and a preparation method thereof. The PVDF modified functional membrane is obtained by grafting a functional polymer on the surface of a PVDF membrane by adopting a water phase atom transfer free radical polymerization method. The invention has the advantages that: on the basis of keeping the advantages of the original PVDF, the hydrophilicity and pollution resistance of the membrane are enhanced. The method has a simple process, is environmental-friendly and is suitable for industrial production. By grafting of different monomers, various membranes with different functions can be obtained.
Description
technical field [0001] The invention relates to a polyvinylidene fluoride hydrophilic modified membrane and a preparation method thereof. Background technique [0002] In the field of water treatment in the 21st century, membrane separation technology has become one of the preferred technologies in this field due to its characteristics of high efficiency, environmental protection, energy saving, simple process and automatic control. Membrane is the core of membrane technology, and its chemical properties and structure play a decisive role in the performance of membrane separation. Polyvinylidene fluoride (PVDF) has the advantages of excellent chemical stability, radiation resistance, heat resistance and easy film formation. Therefore, it has received widespread attention from researchers and has been widely used in chemical, electronic, textile, food, biochemical and other fields. However, due to the low surface energy and strong hydrophobicity of PVDF, surface adsorption ...
Claims
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IPC IPC(8): C08J7/16C08L27/16
Inventor 孟建强陈春霖倪磊
Owner TIANJIN POLYTECHNIC UNIV