| 单宁改性酚醛基炭气凝胶的制备及其CO2吸附性能 |
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| 引用本文： | 周亚兰,罗路,范毜仔,杜官本,赵伟刚. 单宁改性酚醛基炭气凝胶的制备及其CO2吸附性能[J]. 复合材料学报, 2023, 40(1): 270-279. DOI: 10.13801/j.cnki.fhclxb.20220110.002 |
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| 作者姓名： | 周亚兰 罗路 范毜仔 杜官本 赵伟刚 |
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| 作者单位： | 1.福建农林大学 材料工程学院，福州 350002 |
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| 基金项目： | 国家自然科学基金面上项目(31971593；32071688)；福建省自然科学基金面上项目(2023J01133649) |
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| 摘 要： | 基于绿色低成本的单宁所具有的大量反应性羟基，其与醛类反应具有与苯酚或间苯二酚相似的机制。在传统的酚醛树脂基(苯酚-尿素-甲醛)炭气凝胶的基础上，通过添加单宁进行改性，成功制备出新型高效的CO2吸附用酚醛基炭气凝胶。通过扫描电子显微镜(SEM)、傅里叶红外光谱(FTIR)和氮气吸脱附测试对其表面化学和孔隙结构进行了系统表征，同时通过CO2吸脱附测试对其CO2吸附量、选择性吸附及吸附热等进行了研究。结果表明：以绿色可再生的生物质原料单宁对原料进行部分取代，不仅可以显著降低产品成本，还可以明显改善其CO2的吸附性能。当单宁的添加量(15 g)为苯酚用量的50wt%时，样品具有最大的比表面积(1 376.31 m2·g-1)和微孔体积(0.55 cm3·g-1)，是一种极具潜力的气体吸附材料。其相应的CO2吸附量高达5.36 mmol·g-1，选择性吸附和吸附热则分别为16.84和34.49 kJ·mol-1<...
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| 关 键 词： | 单宁 酚醛树脂 炭气凝胶 二氧化碳 吸附 纳米结构 |
| 收稿时间： | 2021-12-01 |
Preparation and CO2 adsorption properties of tannin modified phenolic based carbon cryogels |
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| Affiliation: | 1.College of Material Engineer, Fujian Agriculture and Forestry University, Fuzhou 350002, China2.College of Material Science and Engineering, Southwest Forestry University, Kunming 650224, China |
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| Abstract: | Based on the large number of reactive hydroxyl of green and low cost of tannin, its hold the similar mechanism as phenol and resorcinol reacted with formaldehyde. On the basis of carbon cryogels from traditional phenolic resin (phenol-urea-formaldehyde), a new type of carbon cryogels for efficient CO2 capture were successfully prepared by tannin modification. The surface chemistry and pore structure of carbon aerogel were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and nitrogen adsorption and desorption analysis. The adsorption capacity, selectivity and adsorption heat of carbon cryogel were studied by carbon dioxide adsorption and desorption analysis. The results show that the new and efficient phenolic carbon cryogel can be prepared by using green and renewable biomass raw material tannin to partially replace the traditional phenol or resorcinol, which can not only significantly reduce the product cost, but also significantly improve the carbon dioxide adsorption performance. When the addition amount of tannin (15 g) is 50wt% of that of phenol, the sample has the maximum specific surface area (1376.31 m2·g?1) and micropore volume (0.55 cm3·g?1), which is a potential gas adsorption material. The corresponding CO2 adsorption capacity is as high as 5.36 mmol·g?1, and the selective adsorption and adsorption heat are 16.84 and 34.49 kJ·mol?1, respectively. The properties of phenolic carbon aerogels are significantly better than those of unmodified phenolic carbon aerogels, and also better than most of the traditional carbon aerogels. This is mainly attributed to its high specific surface area, micropore volume, suitable pore size distribution and good 3D network structure. |
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