6 Cocoon Silk: From Mesoscopic Materials Design …
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Fig. 6.24 Typical techniques measuring nucleation rates a Image of spectrophotometer applied
to measure turbidity of solution. b Image of rheometer applied to record temporal evolution of
storage modulus of solution. c Normalized OD changes of neat SF solution and SF-PS mixtures
with various PS concentrations. d Storage moduli of SF-PS mixtures at various PS concentrations
as a function of time. Reproduced with permission [19]. Copyright 2019, Wiley-VCH. e Linear
correlation between nucleation rate J and the density of the added nucleation seeds N°
materials was investigated by FTIR and WAXD, respectively. The results show that
both β-conformations (including both β-sheets and β-crystallites) and β-crystallites
increased constantly with increasing CNT content in the CNT/SF composite fibers,
further indicating that CNTs are favorable for the nucleation process of β-sheets and
β-crystallites.
Figure 6.25c displays the mesoscopic hierarchical networks of neat SF fibers, in
which the most important structural units are interpenetrating SF nanofibrils. When
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