Abstract
CATIONIC polymers are strongly adsorbed onto cellulose fibres by mechanisms which are regarded as primarily electrostatic1–5. Unexpectedly, however, the adsorption of polyethyleneimine (PEI) is apparently not completely reversible and this has been attributed to an intimate chain entanglement with polysaccharide molecules which inhibits its elution4,6. We now present evidence for a new general type of physical combination of polymers with microporous solids which is responsible for this apparent irreversible retention of PEI.
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References
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ALLAN, G., AKAGANE, K., NEOGI, A. et al. Physical Entrapment of Polyelectrolytes within Microporous Solids: the “Jack-in-the-Box” Effect. Nature 225, 175–176 (1970). https://doi.org/10.1038/225175a0
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DOI: https://doi.org/10.1038/225175a0
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