fig4

Figure 4. Mechanical designs for the interfacial strength and anisotropy of additive manufactured soft materials. (A) Improving the interfacial strength between chemically dissimilar materials by adding initiators to trigger interfacial reactions^[81]. (B) Improving the interfacial strength by selective wavelength irradiation to create interfacial penetration^[83]. (C) Improving the interfacial strength with a water-soluble initiator^[82]. (D) Improving the interfacial strength by material mixing^[79,80]. (E) A weak interface and the origin of macroscopic anisotropy in DLP-printed materials revealed by indentation^[71]. (F) Anisotropic failure stress and failure strain of additive manufactured polymers determined from experiment and simulation^[94].