A Simple Synthesis Method of Water‐Soluble Pseudo‐Polyrotaxane Cross‐Linkers Based on Cyclodextrin

Abstract

Abstract Currently, preparation of polymerizable polyrotaxane cross‐linkers (PCs) or pseudo‐polyrotaxane cross‐linkers (PPCs), including water‐soluble PCs or PPCs requires at least three‐step or more complicated chemical reactions. Herein, a simple and effective method is proposed to prepare two kinds of water‐soluble pseudo‐polyrotaxane cross‐linkers based on cyclodextrin. This means it is more convenient to apply the pulley effect to a wider range of hydrogels. The structures of cross‐linkers are characterized by nuclear magnetic resonance spectroscopy, X‐ray diffraction, and atomic force microscopy. Further, two kinds of pseudo‐polyrotaxane cross‐linkers and conventional cross‐linker are, respectively, copolymerized with acrylamide to prepare hydrogels to compare the properties of hydrogels. The swelling ratios and deformation ability of hydrogel prepared by pseudo‐polyrotaxane cross‐linker are better than that of hydrogel prepared by conventional cross‐linker.