Hofmeister‐Effect Regulated Wood‐Based Supramolecular Colored Glass

Abstract Energy conservation and environmental protection have driven the demand for research on transparent materials. Wood can be processed into transparent materials through pore filling or structural densification. However, existing wood‐based transparent materials universally face a critical challenge: the difficulty in simultaneously achieving high stiffness and high toughness, limiting their practical utility. Therefore, this study proposes a fabrication strategy based on the Hofmeister effect. By utilizing metal ions to modulate wood crystallinity, inter‐fibril spacing, and microfibril angle, precise multi‐scale structural design, fabricating transparent woody glass is achieved. Compared to transparent wood, glass and plastics, this material achieves a synergistic improvement of high stiffness (flexural strength 319.5 MPa, flexural modulus 49.7 GPa) and high toughness (tensile strength 570.9 MPa, fracture work 36.1 MJ m −3 ). This enhancement is primarily attributed to two factors: (1) the salting‐out effect increases the packing density of hydrogen bonds, and (2) stronger binding energy between metal ions and carboxyl groups enhances interfacial stability. Additionally, woody glass exhibits versatile functional advantages, including high haze, color tunability, weather resistance, and radiative cooling, demonstrating significant application potential in the fields of high structural safety architecture and decoration.