| 陈群玉,章结兵.纤维素/氧化石墨烯复合气凝胶的制备及其吸附性能研究[J].中国造纸,2025,44(12):105-111 |
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| 纤维素/氧化石墨烯复合气凝胶的制备及其吸附性能研究 |
| Preparation of Cellulose/Graphene Oxide Composite Aerogels and Their Adsorption Performance |
| 收稿日期:2025-09-20 修订日期:2025-10-29 |
| DOI:10.11980/j.issn.0254-508X.2025.12.011 |
| 关键词: 办公废纸 气凝胶 氧化石墨烯 吸附性能 |
| Key Words:office waste paper aerogels graphene oxide adsorption performance |
| 基金项目: |
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| 摘要点击次数: 1623 |
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| 摘要:本研究以办公废纸和氧化石墨烯为原料,制备了纤维素基氧化石墨烯多孔气凝胶复合材料,并采用(3-氨基丙基)三乙氧基硅烷对其进行胺基官能化改性,以增强其对CO2的捕获能力。此外,全面评估了该复合材料的吸附动力学、等温吸附热、循环稳定性、CO2/N2选择性以及吸水性能。结果表明,改性纤维素/氧化石墨烯复合气凝胶在25 ℃,0.001、0.01和0.1 MPa压力下对CO2吸附量分别达1.2、1.5和2.5 mmol/g,在0.01 MPa条件下CO2/氮气选择性为87。该复合材料展现出良好的循环性能:在变压吸附过程中仅出现轻微容量衰减,而在变温/变压吸附后能够实现完全再生。 |
| Abstract:Cellulose-based porous aerogel composites were prepared from office waste paper and graphene oxide (GO), followed by amine functionalization of the surface with (3-aminopropyl) triethoxysilane (APTES) to enhance CO2 capture.In addition, adsorption kinetics, isosteric heat of adsorption, cycling stability, CO2/N2 selectivity, and water uptake were evaluated. The APTES-functionalized cellulose/GO composite aerogel exhibited CO2 uptaked of 1.2, 1.5, and 2.5 mmol/g at 25 ℃ under 0.001, 0.01, and 0.1 MPa, respectively, with a CO2/N2 selectivity of 87 at 0.01 MPa. The material showed robust cycling performance: only slight capacity fade under pressure-swing adsorption, while complete regeneration was achieved after temperature- and/or pressure-swing desorption. |
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