A novel method has been successfully developed for the facile and efficient removal of organic micro-pollutants (OMP) from water based on novel functional capsules encapsulating molecular-recognizable nanogels. The functional capsules are composed of ultrathin calcium alginate (Ca-Alg) hydrogel shells as semipermeable membranes and encapsulated poly(N-isopropylacrylamide-co-acrylic acid-g-mono-(6-ethanediamine-6-deoxy)-β-cyclodextrin) (PNCD) nanogels with β-cyclodextrin (CD) moieties as OMP capturers. The semipermeable membranes of the capsules enable the free transfer of OMP and water molecules across the capsule shells, but confine the encapsulated PNCD nanogels within the capsules. Bisphenol A (BPA), an endocrine-disrupting chemical that is released from many plastic water containers, was chosen as a model OMP molecule in this study. Based on the host–guest recognition complexation, the CD moieties in the PNCD nanogels can efficiently capture BPA molecules. Thus, the facile and efficient removal of BPA from water can be achieved by immersing the proposed functional capsules into BPA-containing aqueous solutions and then simply removing them, which is easily done due to the capsules’ characteristically large size of up to several millimeters. The kinetics of adsorption of BPA molecules by the capsules is well described by a pseudo-second-order kinetic model, and the isothermal adsorption thermodynamics align well with the Freundlich and Langmuir isothermal adsorption models. The regeneration of capsules can be achieved simply by washing them with water at temperatures above the volume phase transition temperature of the PNCD nanogels. Thus, the proposed functional capsules encapsulating molecular-recognizable nanogels provide a novel strategy for the facile and efficient removal of OMP from water.

基于封装分子可识别纳米凝胶的新型功能胶囊，已成功开发出一种新方法，可轻松有效地去除水中的有机微污染物 (OMP)。功能性胶囊由作为半透膜的超薄海藻酸钙（Ca-Alg）水凝胶壳和封装的聚（N-异丙基丙烯酰胺-共-丙烯酸-g）组成。-mono-(6-乙二胺-6-deoxy)-β-cyclodextrin) (PNCD) 纳米凝胶与 β-环糊精 (CD) 部分作为 OMP 捕获剂。胶囊的半透膜使 OMP 和水分子能够自由转移穿过胶囊壳，但将封装的 PNCD 纳米凝胶限制在胶囊内。双酚 A (BPA) 是一种从许多塑料水容器中释放出来的干扰内分泌的化学物质，在本研究中被选为模型 OMP 分子。基于主客体识别复合，PNCD 纳米凝胶中的 CD 部分可以有效地捕获 BPA 分子。因此，通过将所提出的功能性胶囊浸入含 BPA 的水溶液中，然后简单地将其去除，可以轻松有效地从水中去除 BPA，由于胶囊的特征性大尺寸可达几毫米，因此这很容易完成。胶囊对 BPA 分子的吸附动力学由伪二级动力学模型很好地描述，等温吸附热力学与 Freundlich 和 Langmuir 等温吸附模型很好地吻合。胶囊的再生可以通过在高于 PNCD 纳米凝胶的体积相变温度的温度下用水洗涤来实现。因此，所提出的封装分子可识别纳米凝胶的功能胶囊为从水中轻松有效地去除 OMP 提供了一种新策略。等温吸附热力学与 Freundlich 和 Langmuir 等温吸附模型非常吻合。胶囊的再生可以通过在高于 PNCD 纳米凝胶的体积相变温度的温度下用水洗涤来实现。因此，所提出的封装分子可识别纳米凝胶的功能胶囊为从水中轻松有效地去除 OMP 提供了一种新策略。等温吸附热力学与 Freundlich 和 Langmuir 等温吸附模型非常吻合。胶囊的再生可以通过在高于 PNCD 纳米凝胶的体积相变温度的温度下用水洗涤来实现。因此，所提出的封装分子可识别纳米凝胶的功能胶囊为从水中轻松有效地去除 OMP 提供了一种新策略。