Rapid generation and control of microporosity, bimodal pore size distribution, and surface area in Davankov-type hyper-cross-linked resins

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Synthesis of Davankov-type hyper-cross-linked resin beads has been carried out using gel-type and permanently porous poly(divinylbenzene-co-vinylbenzyl chloride) (DVB-VBC) precursor resins without any external electrophile. Of the Lewis acids examined (FeCl3, AlCl3, SnCl4), FeCl3 was by far the most effective catalyst. Rather remarkably in the case of a gel-type 2 mol % DVB-VBC precursor, extensive microporosity was generated within only 15 min of initiating the cross-linking reaction, yielding a surface area (N-2 sorption/BET) of similar to 1200 in which rose steadily to a maximum approaching 2000 m(2) g(-1) in after 18 h. In the case of porous DVB-VBC precursor resins, the presence of discrete pores in the precursor, accompanied by a micropore fraction on hyper-cross-linking, yields resins with a clearly bimodal distribution of pores. Manipulation of the Friedel-Crafts reaction variables and the structure of the precursor resin allows final resin products to be prepared with surface areas in the range similar to 300-2000 m(2) g(-1).
Publisher
AMER CHEMICAL SOC
Issue Date
2006-01
Language
English
Article Type
Article
Keywords

HYPERCROSSLINKED POLYMERIC ADSORBENTS; STYRENE-DIVINYLBENZENE COPOLYMERS; SOLID-PHASE EXTRACTION; PENDANT VINYL GROUPS; POLAR COMPOUNDS; POLYSTYRENE; SORPTION; ADSORPTION; NETWORKS; BEADS

Citation

MACROMOLECULES, v.39, no.2, pp.627 - 632

ISSN
0024-9297
DOI
10.1021/ma051152n
URI
http://hdl.handle.net/10203/3723
Appears in Collection
CBE-Journal Papers(저널논문)
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