宋文琦,符泽鹏,王紫,任芷桦,王思雨,杨成林,朱雪瑶,彭亲,杨苗秀.多孔纤维素表面聚离子液体交联结构构建与吸附性能研究[J].中国造纸学报,2024,(3):1-9 |
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多孔纤维素表面聚离子液体交联结构构建与吸附性能研究 |
Construction of Polymeric Ionic Liquid Crosslinked Structures on Porous Cellulose and Study on Adsorption Performance |
投稿时间:2023-03-22 修订日期:2023-03-26 |
DOI:10.11981/j.issn.1000-6842.2024.03.01 |
中文关键词: 纤维素 聚离子液体 吸附 刚果红 |
Key Words:cellulose polymeric ionic liquid adsorption congo red |
基金项目:国家自然科学基金项目(22308283);陕西省科技厅项目(2022JQ-127);西京学院“大学生创新创业训练计划”项目(X202312715091);本研究获得了陕西青年创新团队的支持。 |
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中文摘要: |
本研究开发了一种新型聚咪唑离子液体改性多孔纤维素(PC@PCIL),并用于高效去除水相中偶氮染料。通过碱/尿素溶剂体系,以棉浆为原料,制备多孔纤维素基质(PC),再引入1-乙烯基-3-丁基咪唑氯盐和3,3-1,4-亚苯基双(亚甲基)双(1-乙烯基咪唑二氯盐)作为共聚单体,采用可控活性聚合技术构建PC表面的聚离子液体交联结构,制备得到PC@PCIL吸附剂。该吸附剂对水相中刚果红的吸附量高达544 mg/g,吸附过程主要以静电相互作用、π-π堆叠和疏水作用的协同化学吸附机制为主导,遵循准二级动力学模型和Freundlich等温吸附模型。 |
Abstract: |
This study developed a novel polymeric imidazolium ionic liquid-modified porous cellulose (PC@PCIL) for the removal of azo dyes from water with high efficiency. Porous cellulose substrates (PC) were prepared from cotton pulp through an alkali/urea solvent system, following by the introduction of 3,3-([1,1-biphenyl]-4,4-diylbis(methylene))bis(1-vinyl-1H-imidazol-3-ium) chloride and 3-butyl-1-vinyl-1H-imidazol-3-ium chloride as co-monomers. Controlled living polymerization technique was employed to construct polymeric ionic liquid interlinked structures on the surface of PC to prepare adsorbent PC@PCIL. This adsorbent exhibited an adsorption capacity of up to 544 mg/g for congo red in water, and the adsorption process was primarily governed by a synergistic chemical adsorption mechanism involving electrostatic interactions, π-π stacking, and hydrophobic effects, following the pseudo-second-order kinetic model and Freundlich isotherm model. |
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