Harvard Researchers Transform Industrial Knits into Smart Textiles with Integrated Switches
Researchers at the Harvard John A. Paulson School of Engineering and Applied Sciences, led by Dr. Kausalya Mahadevan, have developed a method to turn ordinary industrial knits into smart textiles capable of acting as switches. This innovation redefines knitting by transforming it into a scalable platform for nonlinear mechanical metamaterials. The team utilized an industrial technique called 'Plating,' where two different elastic yarns are knitted simultaneously, with one yarn consistently on the top face and the other on the bottom. The slight difference in elasticity between the yarns creates asymmetric residual stress, causing the fabric to spontaneously curl. By arranging these restressed domains into orthogonal stripes, the textile achieves 'multistability,' allowing it to snap and hold between two distinct states, functioning like a soft logic gate. To integrate electronics, a soft conductive yarn, coated with a thin layer of metal, is knitted into the fabric. This allows the fabric itself to complet...
