EAGER: Engineering a Modifiable Clay: "Tunable" Polymer-Clay Composite

EAGER：设计可改性粘土：“可调节”聚合物粘土复合材料

• 批准号: 1041995
• 负责人: Angelica Palomino
• 金额: $ 5万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-07-15 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1041995&HistoricalAwards=false
• 关键词: EAGER; Engineering; Modifiable; Clay; Tunable

This grant provides funding for exploring the feasibility of manipulating a polymer-clay composite in which the particle layer interspacing is controlled via a pH- and ionic concentration-responsive polymer. This exploratory research will investigate the extent to which interlayer spacing of polymer-clay composites synthesized with a responsive polymer can be directly manipulated with pH- or ionic concentration-adjusted pore fluids. Clay-polymer composites will be synthesized with Montmorillonite clay and polyacrylamide using a solution intercalation technique. Characterization of the resultant materials and measurement of the interlayer spacings will be performed using X-ray diffraction, ellipsometry, and transmission electron microscopy at the particle level. At the meso-scale, swell potential measurements will be performed. If successful, the results of this work will contribute to the establishment of a novel field of research: engineered soils using functional polymers. Developing this field of research will lead to a broader approach to geotechnical engineering practices. The main contribution expected from this work is to show that the interlayer spacing of the synthesized polymer-clay composites can be manipulated for the purpose of controlling, and even reversing, a meso-scale soil material property, swell potential. The results of this work will provide a greater understanding of responsive polymer-clay composite systems. Advanced knowledge of polymer-clay composites will lead to the development of tunable engineered soil materials to improve the performance of barrier systems, clay liners, filters, and contaminant removal systems.

该赠款为探索操纵聚合物-粘土复合材料的可行性提供了资金，其中颗粒层间距通过 pH 值和离子浓度响应聚合物进行控制。 这项探索性研究将调查用响应性聚合物合成的聚合物-粘土复合材料的层间距可以在多大程度上直接用 pH 值或离子浓度调节的孔隙流体来控制。 粘土聚合物复合材料将采用溶液插层技术由蒙脱石粘土和聚丙烯酰胺合成。 所得材料的表征和层间距的测量将使用 X 射线衍射、椭圆光度法和透射电子显微镜在颗粒水平上进行。 在细观尺度上，将进行膨胀电位测量。 如果成功，这项工作的结果将有助于建立一个新的研究领域：使用功能聚合物工程土壤。 发展这一研究领域将为岩土工程实践带来更广泛的方法。 这项工作的主要贡献是表明可以操纵合成的聚合物-粘土复合材料的层间距，以达到控制甚至逆转细观土壤材料特性（膨胀潜力）的目的。 这项工作的结果将有助于人们更好地理解响应性聚合物-粘土复合材料系统。 聚合物-粘土复合材料的先进知识将促进可调工程土壤材料的开发，以提高屏障系统、粘土衬垫、过滤器和污染物去除系统的性能。