A study of polymer-clays formed by direct synthesis
- Argonne National Lab., IL (United States); and others
Synthetic hectorites were hydrothermally crystallized with direct incorporation of a series of water-soluble polyvinyl alcohols (PVA) with molecular weights from 9,000 to 146,000, the cationic polymer poly(dimethyl diallyl ammonium chloride) (PDDA), and two cellulose polymers: hydroxypropyl methylcellulose (HPMC) and hydroxyethyl cellulose (HEC). The molecular weight of PVA had little effect on the success of hydrothermal hectorite synthesis, d-spacing, or amount of polymer incorporated. The basal spacings range from 19.5 to 20.8 {Angstrom} with no clear trends proportional to polymer MW. Synthetic PDDA-hectorite displays the lowest d-spacing at 15.8 {Angstrom}, and much less PDDA is incorporated into hectorite (8% organic) than the other synthetic polymer-hectorites (18-23% organic). Different polymer conformations and uptake levels are speculated to account for the differences in basal spacings. Results from small angle scattering methods used on the crystallizing gels will be reported.
- OSTI ID:
- 126792
- Report Number(s):
- CONF-950402--
- Country of Publication:
- United States
- Language:
- English
Similar Records
Porous networks derived from synthetic polymer-clay complexes
Materials with controlled mesoporosity derived from synthetic polyvinylpyrrolidone-clay composites.