Tannic-Ca2+ complex-induced rapid fabrication of anti-freezing and adhesive hydrogels for high-performance strain sensing

Key Points

• Hydrogels exhibit enhanced strain sensing capabilities due to the tannic acid-calcium complex.
• Experiments show that these hydrogels maintain functionality at low temperatures, enhancing anti-freezing properties.
• Complex formation through incorporating calcium enhances both adhesion and mechanical strength of the hydrogels.
• Future applications may include advanced sensors and adhesives, supporting various engineering fields.