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Preparation of silica nanoparticle based polymer composites via mussel inspired chemistry and their enhanced adsorption capability towards methylene blue

机译：通过贻贝启发化学制备二氧化硅纳米粒子基聚合物复合材料及其增强对亚甲基的吸附能力

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The highly efficient removal of environmental pollutants from aqueous solution using low cost adsorbents has recently attracted great research attention. Among them, polymer nanocomposites should be some of the most important candidates for adsorption applications because of their combination of the advantages of both nanomaterials and polymers. In this work, a bioinspired strategy has been developed for the fabrication of silica nanoparticle based polymer composites, which were used as low cost and highly efficient adsorbents for the removal of methylene blue. First, poly(SVS- co -ITA) copolymers were synthesized by free radical polymerization using 4-vinylbenzenesulfonate and itaconic anhydride as monomers. Then dopamine was linked with poly(SVS- co -ITA) through a rather facile ring-opening reaction. The final SiO _(2) @poly(SVS- co -ITA–DA) polymer nanocomposites were obtained by attaching poly(SVS- co -ITA–DA) onto silica nanoparticles taking advantage of dopamine adhesion. The structure, morphology and chemical compositions of SiO _(2) @poly(SVS- co -ITA–DA) polymer nanocomposites were characterized by a number of methods in detail. The effect of adsorption parameters, including contact time, concentration of methylene blue, temperature and pH, on adsorption capability have been investigated. The adsorption data was fitted by Langmuir and Freundlich adsorption models. The pseudo-first-order, pseudo-second-order and intra-particle diffusion models were used for kinetic analysis. We found that the adsorption capacity of SiO _(2) @poly(SVS- co -ITA–DA) nanocomposites is much greater than that of raw SiO _(2) NPs. Taken together, we have developed a bioinspired strategy to prepare silica nanoparticle based polymer nanocomposites with improved performance for environmental applications.
机译：使用低成本吸附剂从水溶液中高效除去环境污染物最近引起了巨大的研究。其中，由于其组合纳米材料和聚合物的优点，聚合物纳米复合材料应该是吸附应用的一些最重要的候选物。在这项工作中，已经开发了用于制造二氧化硅纳米粒子基的聚合物复合材料的生物悬浮策略，其用作低成本和高效的吸附剂，用于去除亚甲基蓝色。首先，通过使用4-乙烯基苯磺酸盐和衣康酸酐作为单体，通过自由基聚合来合成聚（SVS-Co-Co-CaiTa）共聚物。然后通过相当容易的开环反应与聚（SVS-CO-CO-COITA）连接多巴胺。通过将聚（SVS-CO-COITA-DA）连接到利用多巴胺粘附的二氧化硅纳米粒子上，得到最终SiO _（2）@poly（SVS-Co-DA）聚合物纳米复合材料。通过一些方法表征SiO_（2）@poly（SVS-Co-DA）聚合物纳米复合材料的结构，形态和化学组成。已经研究了吸附参数的影响，包括接触时间，亚甲基蓝，温度和pH的吸附能力。吸附数据由Langmuir和Freundlich吸附模型装配。伪一阶，伪二阶和颗粒颗粒扩散模型用于动力学分析。我们发现SiO_（2）@poly（svs-co-da）纳米复合材料的吸附容量远大于原始SiO_（2）NPS的吸附容量。我们一起服用，制定了一种生物悬浮的策略，用于制备硅纳米粒子基的聚合物纳米复合材料，具有改进的环境应用性能。

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