Tremendous Stiffness‐Changing Polymer Networks Enabled by Touch‐Induced Crystallization

Abstract Stiffness‐changing polymers are critically needed for intelligent and adaptive applications in soft robotics and wearable electronics; however, they suffer from the requirement of persistent external stimulation. Herein, a stiffness‐changing polymer network impregnated with a supercooled ionic liquid is introduced, which undergoes touch‐induced crystallization from a soft ionogel to a stiff plastic. The network exhibits a remarkable …