材料学领域世界权威期刊《Advanced Materials》（工程技术，1区，IF=25.809）刊发了实验室马春新副研究员的论文《 An Ion-Crosslinked Supramolecular Hydrogel for Ultrahigh and Fast Uranium Recovery from Seawater》（博士生闫冰洁为第一作者，马春新副研究员为共同第一作者，王宁教授为通讯作者），该论文报道了采用离子交联的方法，设计和制备了一种新型聚偕胺肟超分子水凝胶高效铀吸附剂。

Advanced Materials(Engineering and Technology, Ranking Q 1, IF=25.809), the world’s leading journal in the field of materials science, published the paperAn Ion-Crosslinked Supramolecular Hydrogel for Ultrahigh and Fast Uranium Recovery from Seawaterby Associate Research Professor Ma Chunxin (PhD student Yan Bingjie is the first author, Associate Research Professor Ma Chunxin is the co-first author, and professor Wang Ning is the corresponding author). The paper reported the design and preparation of a new ion-crosslinked supramolecular Zn2+–poly (amidoxime) (PAO) hydrogel that can super-efficiently adsorb uranium from seawater.

针对当前水凝胶和纤维类铀吸附剂目前单纯通过提高比表面积或改善亲水性所存再的问题，该研究采用二价锌离子（Zn2+）做离子交联剂，可将聚偕胺肟高分子一步法直接交联，成功开发了一种独特的超分子水凝胶，具有以下突出优点：（1）由于不需要额外附加水凝胶网络，只需少量的Zn2+，水凝胶中聚偕胺肟的含量极高（约96 wt%）；（2）此外，虽然Zn2+的加入量很少（约4 wt%），但由于其本身的超亲水性，可使聚偕胺肟高分子交联后形成良好的亲水3D水凝胶网络。由此形成的高聚偕胺肟含量的超分子水凝胶，具有优异的提铀性能：在32 ppm加铀纯水和32 ppm加铀海水中的饱和提铀量分别可达1188 mg/g和831 mg/g；更重要的是，在真实海水中4周后的提铀量可达9.23 mg/g，其提铀量和提铀速率在现有各类铀吸附剂中名列前茅，且制备简单，不需任何特殊仪器，因而成本极低，非常便于未来大规模生产。

In response to the current problems of hydrogel and fiber-based uranium adsorbentsofsolely increasing the surface area or improving hydrophilicity, the study explored an ion-crosslinked supramolecular Zn2+–PAO hydrogel membrane owning super-efficient uranium adsorption performance. The study selected the bivalent or multivalent cation as the crosslinker for fabricating the supramolecular hydrogel because a small percentage of this type of superhydrophilic cation can 1) directly crosslink a large number of PAOs to form a hydrogel without the need for an additional hydrogel network, and 2) because the added Zn2+ comprises no more than 4 wt% of the dry gel (mZn2+:mPAO = 4:100), the percentage of PAOs in the hydrogel is very high (≈96 wt% of the dry gel). As a result, this low-cost Zn2+–PAO hydrogel membrane exhibits ultrahigh and fast uranium adsorption capacity relative to existing adsorbents. This Zn2+–PAO hydrogel compared well with existing AO-functionalized adsorbents, because of its high PAO content (≈96 wt% of the dry gel) and good hydrophilicity, which allowed it to achieve ultra-efficient uranium adsorption performance (up to 1188 ± 18.9 mg g−1 of MU/Mdry gel in 32 ppm U-spiked aqueous solution). More importantly, after immersion in natural seawater for 4 weeks, the uranium adsorption capacity and average adsorption rate of the Zn2+–PAO hydrogel membrane reached 9.23 ± 0.52 mg g−1 of MU/Mdry gel and 0.330 ± 0.019 mg g−1 day−1, respectively, making it a promising candidate for the ultrahigh and rapid extraction of uranium from seawater at large scales.Because of the simple preparation process, it does not require any special instrumentation, thus having extremely low cost and being very convenient for future mass production.

离子交联Zn²⁺-PAO超分子水凝胶的成胶机理及其选择性提铀机理。