섬유

mechanical, chemical and bacterial resistance of modified polyvinylidene fluoride membranes suitable for ultrafiltration of oil emulsions

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 281
the membranes are made from modified polyvinylidene fluoride the base polymer shows very good resistance to chemical and bacterial attack and the membranes prepared from it should presumably have the same properties. in order to verify the above assumption, the membranes were stored for one year in the presence of the following agents: water, wool scouring waste water, acids, alkali, calcium chloride sodium hypochlorite and sodium bisulfite at concentrations ranging from a few grams to more than one hundred grams per liter the results show that, in most cases, after an initial decline of about 30 during the first three months of storage, the permeate flux for these membranes becomes constant with values corresponding to more than 7000 liters per square meter per day. 17 refs
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