Adsorption of Polyetheramine-230 on Expansive Clay and Structure Properties Investigation
文献类型：期刊论文
| 作者 | Qiu, Yu1,3; Lu, Zheng3,4; Yan, Tingzhou2; Li, Jian2; Hu, Haixiang3; Yao, Hailin3 |
| 刊名 | MATERIALS
 |
| 出版日期 | 2024 |
| 卷号 | 17期号:1页码:16 |
| 关键词 | polyetheramine montmorillonite swelling inhibitor adsorption ions structure |
| DOI | 10.3390/ma17010025 |
| 英文摘要 | Polyetheramine (PEA) is a swelling inhibitor used to address engineering challenges arising from the interaction between montmorillonite (Mt) and water. This study comprehensively investigates the adsorption characteristics of PEA on three representative expansive clay samples: Na-Mt, Ca-Mt, and engineered expansive soil. Additionally, the desorption of exchangeable ions is examined. The findings reveal that a two-stage adsorption kinetic model and a pseudo-second-order kinetic model can properly describe the adsorption kinetics of PEA on expansive clays. PEA exhibits a strong capacity for ion exchange with sodium ions, while the exchange capacity for calcium ions is limited. Both protonated and non-protonated PEA contribute to rapid adsorption processes. The adsorption isotherms are well-fitted by the Langmuir and Freundlich models, with the Langmuir model being reasonable. At lower equilibrium concentrations, a higher proportion of the adsorption amount is attributed to ion exchange compared to higher equilibrium concentrations. Ion exchange emerges as the primary factor contributing to the adsorption of PEA on Na-Mt, whereas the adsorption of PEA on Ca-Mt and expansive soil is primarily attributed to physical adsorption by non-protonated PEA. X-ray diffraction results reveal significant intercalation effects of PEA as they penetrate the interlayer space and hinder interlayer ion hydration. Fourier transform infrared spectrum results demonstrate that the adsorption of PEA minimally impacts the framework of Mt structural units but primarily reduces the adsorbed water content. Clay-PEA composites exhibit a decreased affinity for water. Zeta potential experiments indicate that the adsorption of PEA significantly diminishes the surface potential of clay-PEA composite particles, effectively inhibiting their hydration dispersion. |
| 资助项目 | Natural Science Foundation of Hubei Provincial |
| WOS研究方向 | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001140307000001 |
| 出版者 | MDPI |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/40318]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Lu, Zheng |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Hubei Commun Planning & Design Inst Co Ltd, Wuhan 430051, Peoples R China 3.Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech, Wuhan 430071, Peoples R China 4.Hubei Key Lab Geoenvironm Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qiu, Yu,Lu, Zheng,Yan, Tingzhou,et al. Adsorption of Polyetheramine-230 on Expansive Clay and Structure Properties Investigation[J]. MATERIALS,2024,17(1):16. |
| APA | Qiu, Yu,Lu, Zheng,Yan, Tingzhou,Li, Jian,Hu, Haixiang,&Yao, Hailin.(2024).Adsorption of Polyetheramine-230 on Expansive Clay and Structure Properties Investigation.MATERIALS,17(1),16. |
| MLA | Qiu, Yu,et al."Adsorption of Polyetheramine-230 on Expansive Clay and Structure Properties Investigation".MATERIALS 17.1(2024):16. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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