当前位置:首页>郑州>郑州大学朱军勇/张亚涛教授、天津大学姜忠义教授 Angew.:水凝胶诱导屏蔽效应构建多孔有机笼膜用于高效离子筛分

郑州大学朱军勇/张亚涛教授、天津大学姜忠义教授 Angew.:水凝胶诱导屏蔽效应构建多孔有机笼膜用于高效离子筛分

  • 2026-05-08 16:32:31
郑州大学朱军勇/张亚涛教授、天津大学姜忠义教授 Angew.:水凝胶诱导屏蔽效应构建多孔有机笼膜用于高效离子筛分
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具有内和外微孔结构的多孔有机笼(POCs)为高效离子筛分提供了极具前景的平台。然而,将这些笼状结构组装成具有明确孔结构的连续POC纳米膜仍是一项挑战。本研究报道了一种水凝胶诱导的界面屏蔽策略,通过(1R,2R)-1,2-环己烷二胺(CHDA)与三醛基间苯三酚Tp)之间的界面聚合,制备连续的POC膜。利用能够储存高浓度CHDAKevlar水凝胶快速形成初始膜屏障,止亲水性Tp基中间体扩散至水相。这种屏蔽效应使Tp基化合物被限制在有机相内,从而增强了水凝胶-有机相界面处的分子笼组装。通过调控胺单体浓度可进一步增强屏蔽效应加速连续纳米薄膜的形成,从而生成连续POC并同时在有机相中获得结晶POC纳米颗粒。所制备POC膜展现出22.8 L m-2h-1bar-1优异透水率及高阳离子去除效率。分子动力学模拟的进一步分析表明,POC分子在膜内的有序组装对于实现离子的快速选择性传输至关重要。界面屏蔽策略为开发用于高效离子分离的晶体笼膜提供了新思路。

2026年5月1日,郑州大学化工学院朱军勇张亚涛教授,联合天津大学姜忠义教授,在国际顶级化学期刊《Angewandte Chemie International Edition》上发表了题为β-Ketoenamine Porous Organic Cage Membranes Through Hydrogel-Induced Shielding for Efficient Ion Sieving”的最新研究成果。该研究提出了一种水凝胶诱导的界面屏蔽策略,通过控制界面聚合过程中的扩散与反应动力学,成功制备了具有超高水渗透率和优异多价离子截留性能的连续多孔有机笼膜。该论文的第一作者为郑州大学田田(现比利时鲁汶大学在读博士)成朋,通讯作者为郑州大学朱军勇教授、张亚涛教授及天津大学姜忠义教授。

 1 用于制备β-酮烯胺POC膜的水凝胶诱导屏蔽策略。(aTp-CHDA POC 分子的化学结构及合成。(b)水凝胶诱导界面屏蔽策略的示意图。Kevlar水凝胶通过氢键和静电相互作用富集 CHDA,从而实现致密初始膜的快速形成。这种屏蔽效应有效地抑制了Tp分子向外扩散,将其限制在有机相中,从而促进笼状结构的形成。这反过来又增强了在水凝胶 - 有机界面处笼状结构单元的原位组装结晶,最终得到连续的高性能 POC 膜。

 2 POC 膜的制备与表征。(a)转移至阳极氧化铝(AAO)表面的无支撑 Tp-CHDA POC 薄膜的SEM图像。(b)由载玻片支撑的无支撑纳米薄膜的横截面 SEM 图像。(c无支撑薄膜的透射电子显微镜(TEM)图像。图(c)插图:薄膜表面颗粒的尺寸分布。(dKevlar基底的表面SEM图像(上)和由Kevlar基底支撑的Tp-CHDA复合膜(Tp-CHDA/Kevlar,下)的表面 SEM 图像。(ePAN基底的表面 SEM 图像(上)和由 PAN 基底支撑的 Tp-CHDA 复合膜(Tp-CHDA/PAN,下)的表面 SEM 图像。(fTp-CHDA/Kevlar复合膜的横截面TEM图像。(gKevlarPAN基底的电荷密度。(hKevlar PAN 基底对胺单体的存储容量。(iTp-CHDA/Kevlar Tp-CHDA/PAN 复合膜对二价盐离子的截留性能比较。

 3 POC 晶体和薄膜的物理化学结构。(aTp1-CHDA2Tp1-CHDA8自支撑薄膜的 XRD 图谱和GIWAXS数据。(b)自支撑Tp1-CHDA8薄膜的HRTEM图像。(c支撑 Tp-CHDA 薄膜的氮气吸附-脱附等温线。(d)收集的POC粉末的PXRD图谱。(eTp-CHDA 笼的腔体体积和静态窗口大小。(fTp-CHDA POC的三维四面体结构以及 Tp-CHDA笼的窗口对窗口排列。

 4 浓度驱动的POC膜调制。(a–c)醛与胺摩尔比为1:2a)、1:4b)和 1:8c)时有机相在不同时间的紫外 可见光谱。(d–f)醛与胺摩尔比为1:2d)、1:4e)和1:8f)时水相在不同时间的紫外 可见光谱。(g)不同单体比下反应过程的示意图。

 5 Tp-CHDA POC 复合膜的分离性能。(aTp 浓度对复合膜渗透性和金属离子截留率的影响。(b)不同反应时间制备的膜对各种金属离子的截留率。(cCHDA 浓度对复合膜渗透性和金属离子截留率的影响。(d)不同 CHDA 浓度制备的膜对各种金属离子的截留率(1-Cu2+2-Mg2+3-Ca2+4-Ni2+5-Mn2+)。(e)所制备的 Tp-CHDA膜对不同分子量PEG的截留率和孔径分布。(fTp-CHDA 膜对不同离子溶液的截留率。(g)所制备的 Tp-CHDA膜的操作稳定性。(h)所得Tp-CHDA膜与其他膜的金属离子去除性能比较

 6 穿过 POC 膜的水传输特性。(ab)无定形聚合物膜(M0)(a)和结晶POC膜(M1)(b)中水分子传输的模拟快照。(cM0 M1膜的自由体积分子动力学模拟。蓝色表示聚合物和POC晶体的空隙。(d)笼状网络中1D分子链的快照。(eM0M1膜中水的均方位移(MSD)曲线。(f)通过 M0 M1膜传输的水分子数量(Nw

本研究创新性地提出了一种水凝胶诱导的屏蔽策略,成功制备用于快速离子分离的β-酮烯胺POC膜。具有高储能力的Kevlar水凝胶促进了初始致密膜屏障的快速形成,从而将反应物有效地限制在有机相中,定位引导笼分子在油相-Kevlar界面处成核、组装与结晶。该膜独特的窗口-空腔结构为水分子和离子提供了特异性的传输通道,完美地打破了传统分离膜的渗透性-选择性权衡效应。该项工作不仅为理解复杂界面聚合过程中的反应动力学提供了新见解,也为开发用于水处理及资源回收等领域的高效节能离子筛分膜材料指明了新方向。

论文链接:

https://doi.org/10.1002/anie.7051685

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  1. CONNECT:[ UseTime:0.000343s ] mysql:host=127.0.0.1;port=3306;dbname=i460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000550s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000377s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000252s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000471s ]
  6. SELECT * FROM `set` [ RunTime:0.001290s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000608s ]
  8. SELECT * FROM `article` WHERE `id` = 531417 LIMIT 1 [ RunTime:0.000378s ]
  9. UPDATE `article` SET `lasttime` = 1779040743 WHERE `id` = 531417 [ RunTime:0.001113s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000234s ]
  11. SELECT * FROM `article` WHERE `id` < 531417 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000374s ]
  12. SELECT * FROM `article` WHERE `id` > 531417 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000667s ]
  13. SELECT * FROM `article` WHERE `id` < 531417 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000804s ]
  14. SELECT * FROM `article` WHERE `id` < 531417 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000611s ]
  15. SELECT * FROM `article` WHERE `id` < 531417 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001331s ]
0.084840s