Figure 3

SEM images of (a and i) untreated fibres; (b and ii) alkali treated and bleached fibres; (c, d, iii and iv) oxalic acid treated steam exploded fibres (a-d are eucalyptus samples and i-iv are casuarina samples).
SEM images of (a and i) untreated fibres; (b and ii) alkali treated and bleached fibres; (c, d, iii and iv) oxalic acid treated steam exploded fibres (a-d are eucalyptus samples and i-iv are casuarina samples).