Table 1.

Fracture toughness and healing efficiency of SHDCs and control composites

wt % of microcapsules	Material encapsulated	KICini [MPa·m1/2]	KICheal [MPa·m1/2]	healing efficiency [%]
0 %	No	0.92 ± 0.02	--	--
2.5 %	Water	0.91 ± 0.07	0.07 ± 0.05	7.0 ± 6.0
2.5 %	HL	0.90 ± 0.04	0.08 ± 0.02	9.1 ± 2.1
5 %	Water	0.95 ± 0.04	0.11 ± 0.04	11.6 ± 3.4
5 %	HL	0.91 ± 0.03	0.22 ± 0.03	24.2 ± 3.8
10 %	Water	0.85 ± 0.11	0.08 ± 0.05	9.8 ± 6.5
10 %	HL	0.82 ± 0.06	0.21 ± 0.06	25.4 ± 7.0