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Molecular pore size characterization within chitosan biopolymer using positron annihilation lifetime spectroscopy

Chaudhary, Deeptangshu; Went, Michael; Nakagawa, K; Buckman, Stephen; Sullivan, James


Positron annihilation lifetime spectroscopy has been used to study a chitosan biopolymer, to which nanoclay has been added, and the effect of water absorption and cross-linking on the microporosity. All measurements were conducted at room temperature. The free volume size of the biopolymer samples was obtained based on the ortho-positronium lifetime, and the relative concentration of free volume cavities was measured by the ortho-positronium intensity. Using the PALS technique, effects of...[Show more]

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
Source: Materials Letters
DOI: 10.1016/j.matlet.2010.08.045


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