高等学校化学学报 ›› 2026, Vol. 47 ›› Issue (11): 20260230.doi: 10.7503/cjcu20260230

• 高分子化学 • 上一篇    下一篇

有机-无机复合温敏性聚丙烯酰胺凝胶的合成及对低浓度二氧化碳的吸附性能

解洋铭1, 刘迎雪1, 杨泽凯1, 赵一凡1, 孙涵2, 陈海军1()   

  1. 1.南开大学电子信息与光学工程学院, 天津 300350
    2.郑州大学化工学院, 郑州 450001
  • 收稿日期:2026-06-06 出版日期:2026-11-10 发布日期:2026-09-03
  • 通讯作者: 陈海军 E-mail:chenhj@nankai.edu.cn
  • 基金资助:
    国家重点研发计划项目(2024YFE0206700)

Synthesis of Organic-inorganic Composite Thermosensitive Polyacrylamide Gel and Its Adsorption Performance for Low-concentration Carbon Dioxide

XIE Yangming1, LIU Yingxue1, YANG Zekai1, ZHAO Yifan1, SUN Han2, CHEN Haijun1()   

  1. 1.College of Electronic Information and Optical Engineering,Nankai University,Tianjin 300350,China
    2.School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China
  • Received:2026-06-06 Online:2026-11-10 Published:2026-09-03
  • Contact: CHEN Haijun E-mail:chenhj@nankai.edu.cn
  • Supported by:
    the National Key Research and Development Program of China(2024YFE0206700)

摘要:

温度响应型聚丙烯酰胺凝胶在100 ℃以下的温和温度区间内具有良好的CO2捕集与释放功能, 但乳液状凝胶的分离与纯化难题制约了其工业化应用. 本文通过在聚合反应体系中引入二氧化硅(SiO2)纳米粒子, 制备了具有较大尺寸、 易于分离纯化的有机-无机复合聚丙烯酰胺凝胶颗粒, 并系统考察了SiO2纳米粒子的粒径对所合成的有机-无机复合聚丙烯酰胺凝胶颗粒CO2吸附性能的影响. 本文制备的有机-无机复合聚丙烯酰胺凝胶颗粒对低浓度CO2气体的吸附量最高可达2.4 mmol/g, 并可在80 ℃下实现有效再生; 同时还具有良好的稳定性, 经10次吸附-脱附循环实验后未观察到明显的性能衰减. 这种碳捕集材料对NO具有较好的抗中毒能力. 尽管SO2会对其吸附性能产生明显的抑制作用, 但可通过碱洗实现其吸附性能的再生. 此外, 吸附机理研究结果表明, CO2主要以HCO3-根离子的形式被聚丙烯酰胺凝胶所吸附.

关键词: 聚丙烯酰胺凝胶, 二氧化硅, 碳捕集, 温敏性

Abstract:

Although thermo-responsive polyacrylamide gels possess excellent CO2 capture and release capabilities at temperatures below 100 ℃, their industrial application is hindered by the difficulties associated with the separation and purification of emulsion-type gels. In this work, silica nanoparticles were introduced during the polymerization of polyacrylamide gels, and a large sized organic-inorganic composite polyacrylamide gel with improved separability and purification characteristics was successfully prepared. The influence of silica nanoparticles introduced into the polymerization system on the adsorption performance of organic-inorganic composite polyacrylamide gels was also systematically investigated. The prepared organic-inorganic composite polyacrylamide gel exhibited a maximum CO2 adsorption capacity of 2.4 mmol/g toward low-concentration CO2 and could be effectively regenerated at 80 ℃. No noticeable decline in adsorption performance was observed after ten adsorption-desorption cycles. The adsorbent also showed strong resistance to NO gas. Although SO2 nanoparticles significantly suppressed CO2 adsorption, its adsorption performance could be restored by alkaline washing. Mechanistic analysis indicated that CO2 was predominantly captured in the form of bicarbonate(HCO3- ) species within the polyacrylamide gel matrix.

Key words: Polyacrylamide gel, Silica, Carbon capture, Thermo-responsiveness

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