Synthesis of Surface-Modified Sands with Thermoresponsive Wettability
文献类型：期刊论文
| 作者 | Dong, Yi2; Pamukcu, Sibel1 |
| 刊名 | JOURNAL OF MATERIALS IN CIVIL ENGINEERING
 |
| 出版日期 | 2020-09-01 |
| 卷号 | 32期号:9页码:10 |
| 关键词 | Thermally responsive polymer Surface-initiated atom transfer radical polymerization Poly(N-isopropylacrylamide) Soil wettability |
| ISSN号 | 0899-1561 |
| DOI | 10.1061/(ASCE)MT.1943-5533.0003311 |
| 英文摘要 | Engineered geomaterials are designed with functionalities on demand to address practical problems in the geoenvironment, such as filtration and/or retardation of environmentally hazardous substances. In this study, an engineered soil was introduced with controllable and reversible wettability stimulated by external temperature variation. This new geomaterial was envisioned to retard or accelerate water percolation through its mass with external stimulation when used as a barrier or a filter ex situ or in situ. The tunable wettability was implemented by grafting a thin film of thermal stimuli-responsive polymer [poly(N-isopropylacrylamide) (PNIPAAm)] on sand particles using the surface-initiated atom transfer radical polymerization (SI-ATRP) technique. The PNIPAAm has an easily accessible lower critical solution temperature (LCST), approximate to 32 degrees C. The polymer-coated surface has hydrophilicity at temperatures below the LCST, and changes to hydrophobicity above the LCST. The material composition and structural conformation of synthesized polymer were examined by Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The roughness and thickness and the coverage of the polymer film on substrates were assessed by atomic force microscopy (AFM) and optical ellipsometry. Solid-liquid contact angles and water percolation behavior were examined to verify the wettability change on a surface-modified sand pack triggered by changing temperature externally. The thermal-sensitive wettability demonstration of the synthesized sand particles implies proof of concept for innovative applications of the technique in proactive hazard mitigation such as use as a tunable granular valve, barrier, intelligent fluid separator, or biofilter. |
| 资助项目 | National Science Foundation[CMMI-0900588] ; National Natural Science Foundation of China[NSFC-51779254] ; Hundred Talents Program of the Chinese Academy of Sciences |
| WOS研究方向 | Construction & Building Technology ; Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000587481800017 |
| 出版者 | ASCE-AMER SOC CIVIL ENGINEERS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/25005]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Dong, Yi |
| 作者单位 | 1.Lehigh Univ, Dept Civil & Environm Engn, Bethlehem, PA 18015 USA 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dong, Yi,Pamukcu, Sibel. Synthesis of Surface-Modified Sands with Thermoresponsive Wettability[J]. JOURNAL OF MATERIALS IN CIVIL ENGINEERING,2020,32(9):10. |
| APA | Dong, Yi,&Pamukcu, Sibel.(2020).Synthesis of Surface-Modified Sands with Thermoresponsive Wettability.JOURNAL OF MATERIALS IN CIVIL ENGINEERING,32(9),10. |
| MLA | Dong, Yi,et al."Synthesis of Surface-Modified Sands with Thermoresponsive Wettability".JOURNAL OF MATERIALS IN CIVIL ENGINEERING 32.9(2020):10. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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