Bioinspired Core–Shell Latex for Enhanced Depth of Shade in Polyester Fabric

Polyester fabrics are widely valued for their durability, wrinkle resistance, and easy care. However, the high refractive index of polyester fibers often leads to inadequate color depth in dyeing, especially for the extra deep black fabric. To address this issue, a bioinspired strategy based on the moth-eye antireflection effect was implemented. In this study, a core-shell latex designated as methyl methacrylate (MMA) and diallyl terephthalate (DATP) at polydimethylsiloxane (MD@PDMS) was synthesized via semicontinuous seed emulsion polymerization, featuring a rigid polymethyl methacrylate core cross-linked with DATP and an acrylic acid-terminated polydimethylsiloxane shell. The MD@PDMS deepening agent significantly enhanced the color depth of polyester fabrics by up to 67% while also imparting improved wash fastness, rubbing resistance, and a softer hand feel. The treated fabrics maintained excellent air permeability and exhibited an enhanced hydrophobicity. This study demonstrates a successful bioinspired approach for extra deep black polyester, offering a durable and high-performance finishing solution with strong potential for industrial application.