Synthesis and characterization of positively charge-modified polypropylene membranes

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A technique to incorporate positively charged groups onto the surface of microporous polypropylene membrane filters has been developed. In this method, 4-vinyl-pyridine was polymerized and grafted onto polypropylene membranes using 60Co γ-irradiation. Pyridyl groups on the grafted membranes were then quaternized with butyl bromide. The electrical characteristics of prepared membranes were measured by streaming potential and anionic dye challenge tests. The compatibility of these charge-modified membranes with ultrapure water was investigated. Results show that these charge-modified membranes are characterized by a positive zeta potential in the pH range from 4 to 9.3. From the dye challenge test at a pH of 5.0, the density of positively charged sites was calculated to be 1.7 × 1019 sites/g. The membranes did not release any measurable TOC into ultrapure water and thus appear to have potential for use in DI water systems.

Original languageEnglish (US)
Pages (from-to)367-372
Number of pages6
JournalIEEE Transactions on Semiconductor Manufacturing
Volume6
Issue number4
DOIs
StatePublished - Nov 1993

Fingerprint

Polypropylenes
polypropylene
membranes
Membranes
synthesis
Water
Coloring Agents
Dyes
dyes
water
Zeta potential
Pyridine
compatibility
bromides
pyridines
Irradiation
filters
irradiation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Industrial and Manufacturing Engineering
  • Electronic, Optical and Magnetic Materials
  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics

Cite this

Synthesis and characterization of positively charge-modified polypropylene membranes. / Jan, D.; Raghavan, Srini.

In: IEEE Transactions on Semiconductor Manufacturing, Vol. 6, No. 4, 11.1993, p. 367-372.

Research output: Contribution to journalArticle

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