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. 2020 Oct 13;5(42):27072–27082. doi: 10.1021/acsomega.0c02356

Figure 5.

Figure 5

Tensile strength and elastic modulus values determined for composites containing CP and 20 wt % unmodified or polydopamine-coated (PDA) CF. Inset shows the strain at break values. “CP unmodified CF” denotes a sample prepared using as-received CFs, while in the case of “CP control CF” the fibers were treated the same way as modified samples without dopamine being added to the solution (24 h treatment time). The results of the significance analysis for the tensile strength data are shown with red color; N.S.—not significant, *—significant (P < 0.05), **—significant (P < 0.01). Please note that red line (the beginning and the end of the line) indicates the two samples that are subjected to statistical significance analysis. Compared to the “CP unmodified CF”, the tensile strength values for the samples containing CFs prepared using 2 h (P < 0.01), 5 h (P < 0.05), and 24 h (P < 0.01) deposition time are significantly higher.