In this work, we report a proof-of-concept study on CO₂ adsorbents synthesized by a thermally initiated free-radical copolymerization and then coated onto carbon paper and poly tetra fluoroethylene via a spray coating approach. A milli-channel reactor was employed to support the obtained materials for efficient CO₂ capture with wet conditions, short cooling and heating cycles (303–348 K). CO₂ uptake and release performance of the materials were measured and compared with that of the polyamine-based materials prepared by other methods. CO₂ adsorption and desorption kinetics can be greatly enhanced when using the spray coating approach, especially for carbon paper as supporter. The CO₂ adsorption capacity of the spray-coated carbon paper reaches 80% of its maximum value in only 4.37 ± 0.7 min. Moreover, its adsorption rate (114.6 mg/(g∙min) at 303 K) and desorption rate (239.9 mg/(g∙min) at 348 K) were 81.2% and 81.5% higher than those of the polyamine-impregnated carbon paper, respectively (12% CO₂ at atmospheric pressure). Their largest increases of 71% and 67% were achieved by adjusting the concentration of polyamine nanogel particles deposited on the carbon paper surface. The prepared material also presents stable recyclability over 10 wet adsorption–desorption cycles and the aging experiments. The results obtained in this study indicate that the synthesized materials can serve as promising energy-efficient solid adsorbents for CO₂ capture.

在这项工作中，我们报告了通过热引发的自由基共聚反应合成的CO ₂吸附剂的概念验证研究，然后通过喷涂方法将其涂布到碳纸和聚四氟乙烯上。使用了一个微通道反应器来支撑所获得的材料，以便在潮湿条件，较短的冷却和加热周期（303–348 K）下有效捕获CO ₂。测量材料的CO ₂吸收和释放性能，并将其与通过其他方法制备的基于多胺的材料进行比较。当使用喷涂方法时，CO _2的吸附和解吸动力学可以大大提高，特别是对于复写纸作为载体。一氧化碳₂仅在4.37±0.7分钟内，喷涂碳纸的吸附容量就达到最大值的80％。此外，其吸附速率（303 K时为114.6 mg /（g∙min））和解吸速率（348 K时为239.9 mg /（g∙min））分别比浸渍多胺的碳纸高81.2％和81.5％。 ，分别（在大气压下为12％CO ₂）。通过调节沉积在碳纸表面上的多胺纳米凝胶颗粒的浓度，可实现最大的71％和67％的增长。所制备的材料还可以在10个湿式吸附-解吸循环和老化试验中表现出稳定的可回收性。在这项研究中获得的结果表明，合成的材料可以作为有前途的高能效固体吸附剂用于CO ₂捕集。