Temperature-sensitive materials are increasingly of deep interest to researchers. Ion imprinting technology is widely used in the field of metal recovery. In order to solve the problem of rare earth metal recovery, we designed a temperature-sensitive dual-imprinted hydrogel adsorption product with chitosan as the matrix, N-isopropylacrylamide as a thermally responsive monomer, and La³⁺ and Y³⁺ as the co-templates. The reversible thermal sensitivity and ion-imprinted structure were determined by differential scanning calorimetry, Fourier transform infrared spectrometer, Raman spectra, Thermogravimetric analysis, X-ray photoelectron spectroscopy, Scanning electron microscopy and X-ray energy spectroscopy various characterizations and analyses. The simultaneous adsorption amount of CDIH for La³⁺ and Y³⁺ was 87.04 mg/g and 90.70 mg/g, respectively. The quasi-secondary kinetic model and Freundlich isotherms model well described the adsorption mechanism of CDIH. It's worthy to mention that CDIH could be well regenerated through washing with deionized water at 20 °C, with a desorption rate of 95.29 % for La³⁺ and 96.03 % for Y³⁺. And after 10 cycles of reuse, 70 % of the adsorption amount could be maintained, revealing excellent reusability. Furthermore, CDIH expressed better adsorption selectivity to La³⁺ and Y³⁺ than its non-imprinted counterparts in a solution containing six metal ions.

温度敏感材料越来越引起研究人员的浓厚兴趣。离子印迹技术广泛应用于金属回收领域。为解决稀土金属回收难题，我们设计了一种以壳聚糖为基质，N-异丙基丙烯酰胺为热响应单体，La 3+ 和Y 3+ 的温敏双印迹水^凝胶吸附^产品作为联合模板。通过差示扫描量热法、傅立叶变换红外光谱仪、拉曼光谱、热重分析、X射线光电子能谱、扫描电子显微镜和X射线能谱等各种表征和分析，确定了可逆热敏性和离子印迹结构。^{CDIH对La 3+}和Y ³⁺的同时吸附量分别为87.04 mg/g和90.70 mg/g。准二级动力学模型和Freundlich等温线模型很好地描述了CDIH的吸附机理。^{值得一提的是，CDIH在20℃条件下用去离子水洗涤可以很好地再生，La 3+}的解吸率为95.29%，Y ^{3+的解吸率为96.03%}. 重复使用10次后，仍能保持70%的吸附量，显示出优异的重复使用性。此外，在含有六种金属离子的溶液中，CDIH 对 La ³⁺和 Y ³⁺表现出比其非印迹对应物更好的吸附选择性。