Jayasundera Shalini, Burleigh Mark C, Zeinali Mazyar, Spector Mark S, Miller Joel B, Yan Wenfu, Dai Sheng, Markowitz Michael A
Laboratory for Molecular Interfacial Interactions, Code 6920, Center for Bio/Molecular Science and Engineering, Naval Research Laboratory, Washington, DC 20375, USA.
J Phys Chem B. 2005 May 19;109(19):9198-201. doi: 10.1021/jp051435h.
Benzene, diethylbenzene, and ethylenediamine-bridged bistrialkoxy precursors were used in the synthesis of multifunctional PMO copolymers for the adsorption of phenols and metal ions. Polyoxyethylene(10) stearyl ether (Brij 76) was used as the structure director with the surfactant template approach in the synthesis. The resulting PMO copolymers with two or more bridging groups have been characterized by nitrogen gas adsorption, powder X-ray diffraction, and 13C and 29Si solid-state NMR. These organosilicas exhibit large surface areas, narrow pore size distributions, large total pore volumes, and pore ordering consistent with well ordered, hexagonally packed p6mm structures. Minimal competitive effects were observed on the adsorption of p-chlorophenol to the copolymers in the presence of copper ions in solution. Similarly, the presence of p-chlorophenol in solution or adsorbed onto the copolymers did not interfere with copper adsorption. Replacement of a small portion of the benzene bridge in the 90:10 BENZ:EDA copolymer with diethylbenzene produced a copolymer 2.5-fold more efficient for p-chlorophenol adsorption. ICP analysis revealed that greater than 98% of adsorbed copper was removed during extraction with HCl, and this extraction process can be repeated with no difference in copper adsorption after regeneration.
苯、二乙苯和乙二胺桥联的双三烷氧基前体被用于合成用于吸附酚类和金属离子的多功能PMO共聚物。在合成过程中，聚氧乙烯(10)硬脂基醚(Brij 76)被用作结构导向剂，采用表面活性剂模板法。所得具有两个或更多桥联基团的PMO共聚物已通过氮气吸附、粉末X射线衍射以及13C和29Si固态核磁共振进行了表征。这些有机硅表现出大的表面积、窄的孔径分布、大的总孔体积以及与高度有序的六方堆积p6mm结构一致的孔有序性。在溶液中存在铜离子的情况下，对共聚物吸附对氯苯酚的竞争效应最小。同样，溶液中或吸附在共聚物上的对氯苯酚的存在并不干扰铜的吸附。用二乙苯取代90:10 BENZ:EDA共聚物中一小部分苯桥，得到的共聚物对对氯苯酚的吸附效率提高了2.5倍。ICP分析表明，在用HCl萃取过程中，超过98%的吸附铜被去除，并且该萃取过程可以重复，再生后铜吸附没有差异。
