本发明涉及聚合物技术领域，尤其涉及一种聚合物、水凝胶、负载型聚合物和负载型水凝胶。本发明公开了一种聚合物，该聚合物由电解质单体和非电解质单体共聚而成。其中，非电解质单体中的疏水基团可以提供疏水作用，增强聚合物的力学性能。此外，本发明提供的聚合物中的带正电的R1基团，可以作为阴离子，特别是酸根离子的负载点，利用静电作用将阴离子负载于聚合物材料中。在一定的外界刺激(如多价的金属离子)下，基于不同的平衡之间的转化，聚合物能将阴离子释放，也能进行再次负载。

The invention relates to the technical field of polymers, in particular to a polymer, a hydrogel, a supported polymer and a supported hydrogel. The invention discloses a polymer composed of an electrolyte monomer and a non-electrolyte monomer. Among them, hydrophobic groups in non-electrolyte monomers can provide hydrophobic effects and enhance the mechanical properties of polymers. In addition, the positively charged R1 group in the polymer provided by the invention can be used as the loading point of anions, especially acid ions, and the anions can be loaded into the polymer material by electrostatic action. Under certain external stimuli (such as polyvalent metal ions), the polymer can release anions or re-load them based on the conversion between different equilibria.