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US5282971A Positively charged polyvinylidene fluoride membrane 失效
带正电的聚偏二氟乙烯膜

Positively charged polyvinylidene fluoride membrane
摘要:
A filter medium comprising a microporous polyvinylidene fluoride membrane and a polymer containing positively charged quaternary ammonium groups covalently bonded to the membrane, and a method of using the filter medium to treat a composition, particularly a biological or pharmaceutical composition such as an ophthalmic composition.
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