Atomic force microscopy and X-ray photoelectron spectroscopy study of chitosan-carbon fiber materials

Chitosan as a Coupling Agent for Phosphate Glass Fibre/Polycaprolactone Composites

“…The N 1s peak of CS could be resolved into two peaks at 399.1 and 400.7 eV, assigned to the nitrogen of the amino and amide groups, respectively [62]. The atom % of the amino peak was 95%, agreeing well with the degree of deacetylation (DD > 80%) quoted by the supplier.…”

“…The atom % of the amino peak was 95%, agreeing well with the degree of deacetylation (DD > 80%) quoted by the supplier. As shown in Figure 8b, the peak of NH 2 was also found for the coated fibres, whilst a new peak of NH 3 + appeared at 401.3 ± 0.1 eV binding energy, indicating the partial protonation of the amino groups [62]. Lawrie et al [58] performed XPS on CS powders from Sigma with a reported 85% degree of deacetylation.…”

A novel eco-friendly strategy on the interfacial modification of a carbon-fiber-reinforced polymer composite via chitosan encapsulation

“…The N peaks can be fitted to –NH 3 + near 401.5 eV and –NH 2 near 399.5 eV. 34 The percentage of –NH 3 + decreased with the increase in CS content, but the change in –NH 2 was the opposite. This can be explained as there being electron transfer between CS and OCF, and –NH 2 lost an electron to form positively charged –NH 3 + .…”