Porous polyurethane hydrogels incorporated with CMC for eliminating methylene blue from water

IF 4.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY International Journal of Smart and Nano Materials Pub Date : 2023-01-01 DOI:10.1080/19475411.2022.2158958

Li Wang, Q. Yang, Yong Yang, Kun Luo, Ruqing Bai

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引用次数: 1

Abstract

ABSTRACT Here, a series of polyurethane porous hydrogels (PUF-s) loaded with different sodium carboxymethyl cellulose (CMC) were successfully prepared by one-step foaming method. The physio-chemical properties and morphologies were characterized. The effects of CMC content, adsorbent dosage, temperature, pH value and other factors on the adsorption of methylene blue (MB) dye in water by CMC-PUF-s were also investigated through static adsorption experiments. The results showed that CMC-PUF-10 had excellent adsorption performance for MB solution with removal rate of 81.47%, and the maximum adsorption capacity was 27.5 mg/g. In addition, the study of adsorption kinetics and adsorption isotherms showed that the adsorption of MB by CMC-PUF was more consistent with Langmuir isotherm adsorption model and pseudo second-order kinetic model. The adsorption thermodynamics study suggested that the adsorption process of MB by CMC-PUF-10 was spontaneous and exothermic at room temperature. The results of cyclic adsorption experiment demonstrated that the removal rate of MB reached above 70% after five cycles, indicating the foams with excellent recyclability. Finally, a low-cost, environmentally friendly and recyclable MB adsorbent was synthesized in this study. As polyurethane foam was synthesized by one-step foaming method, this adsorbent can be prepared on site in practical application and reduce the transportation cost. Graphical Abstract

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含有CMC的多孔聚氨酯水凝胶用于去除水中的亚甲基蓝

摘要采用一步发泡法制备了一系列负载不同羧甲基纤维素钠的聚氨酯多孔水凝胶。对其理化性质和形貌进行了表征。通过静态吸附实验，研究了CMC含量、吸附剂用量、温度、pH值等因素对CMC-PUF-s吸附亚甲基蓝（MB）染料的影响。结果表明，CMC-PUF-10对MB溶液具有良好的吸附性能，去除率为81.47%，最大吸附量为27.5mg/g。此外，对吸附动力学和吸附等温线的研究表明，CMC-PUF对MB的吸附更符合Langmuir等温线吸附模型和拟二阶动力学模型。吸附热力学研究表明，CMC-PUF-10对MB的吸附过程在室温下是自发放热的。循环吸附实验结果表明，经过5次循环，MB的去除率达到70%以上，表明泡沫具有良好的可回收性。最后，本研究合成了一种低成本、环保、可回收的MB吸附剂。由于聚氨酯泡沫是采用一步发泡法合成的，因此该吸附剂在实际应用中可以现场制备，降低了运输成本。图形摘要

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来源期刊

International Journal of Smart and Nano Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.30

自引率

5.10%

发文量

审稿时长

11 weeks

期刊介绍： The central aim of International Journal of Smart and Nano Materials is to publish original results, critical reviews, technical discussion, and book reviews related to this compelling research field: smart and nano materials, and their applications. The papers published in this journal will provide cutting edge information and instructive research guidance, encouraging more scientists to make their contribution to this dynamic research field.