Wei Zhuangxin, Ma Xinmin, Wang Pan, Pan Jianming
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
Nanomaterials (Basel). 2022 Oct 1;12(19):3439. doi: 10.3390/nano12193439.
In this work, an olive oil-filled composite capsule (C-O/W) adsorbent was prepared for the adsorption of 3,4,5-trichlorophenol (3,4,5-TCP) by the emulsion templating method. Using methylene diisocyanate (HDI) and 1,6-hexanediamine (HMDA) as functional monomers, olive oil was encapsulated in a shell layer composed of graphene oxide and a polymer by interfacial imine polymerization. The contaminant target was efficiently removed by the hydrophobic interaction between olive oil and chlorophenols. The removal of 3,4,5-TCP was remarkable, with an encapsulation rate of 85%. The unique microcapsule structure further enhanced the kinetic performance, which reached 92% of the maximum value within 40 min. The adsorption of different chlorophenols was investigated using 2-chlorophenol (2-CP), 2,6-dichlorophenol (2,6-DCP), and 3,4,5-TCP. The adsorption of 3,4,5-TCP by the C-O/W microcapsules was found to be much higher than that of other chlorophenols. When analyzing a real sample, the content of 3,4,5-TCP was significantly reduced after adsorption by the C-O/W microcapsules, demonstrating that the C-O/W microcapsules were also capable of removing 3,4,5-TCP from a complex environment. This simple and inexpensive preparation strategy provides a new method for the synthesis of functionalized C-O/W microcapsule adsorbents and an effective adsorbent of 3,4,5-TCP.
在本研究中，采用乳液模板法制备了一种填充橄榄油的复合胶囊（C-O/W）吸附剂，用于吸附3,4,5-三氯苯酚（3,4,5-TCP）。以亚甲基二异氰酸酯（HDI）和1,6-己二胺（HMDA）作为功能单体，通过界面亚胺聚合将橄榄油包裹在由氧化石墨烯和聚合物组成的壳层中。通过橄榄油与氯酚之间的疏水相互作用，有效地去除了目标污染物。3,4,5-TCP的去除效果显著，包封率达85%。独特的微胶囊结构进一步提高了动力学性能，在40分钟内达到最大值的92%。使用2-氯苯酚（2-CP）、2,6-二氯苯酚（2,6-DCP）和3,4,5-TCP研究了不同氯酚的吸附情况。发现C-O/W微胶囊对3,4,5-TCP的吸附远高于其他氯酚。在分析实际样品时，C-O/W微胶囊吸附后3,4,5-TCP的含量显著降低，表明C-O/W微胶囊也能够从复杂环境中去除3,4,5-TCP。这种简单且低成本的制备策略为功能化C-O/W微胶囊吸附剂的合成提供了一种新方法，也是一种有效的3,4,5-TCP吸附剂。
