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Regulation of the elasticity and temperature tolerance of polyacrylamide/Ca(OH)2 nanocomposite organogel using a two-component organic solvent
Polymer Testing ( IF 5.1 ) Pub Date : 2020-12-31 , DOI: 10.1016/j.polymertesting.2020.107018
Lefan Li , Qiao Wang , Xiaoxu Liang , Zongjin Li , Siyao Guo , Guoxing Sun

Most studies on enhanced polymer gels look at modifying the interaction between the polymer matrix and fillers. Here, a new strategy is proposed for the fabrication of a new kind of polyacrylamide/Ca(OH)2 nanocomposite organogel with tunable mechanical properties and temperature tolerance. By changing the solvent component, the properties of an organogel can be modulated without adding further reinforcing agent. Two commonly used organic solvents, glycerin (GL) and ethylene glycol (EG), were used in different weight ratios (GL:EG = 100:0, 70:30, 50:50, 30:70, 0:100) to achieve modulation of the organogel properties. At 25 °C the compressive strength could be regulated in the range 18–29 MPa at 95% strain, and it could be kept in the range 12–46 MPa within the temperature range −25 °C–110 °C. Increasing the proportion of GL, which has a high boiling point, the high and low temperature tolerance of the organogel was strengthened significantly. The EG served as a lubricant and enhanced the tensile recoverability from 77% to 84%. Overall, the properties of the organogel were the best when the GL:EG ratio was 70:30. The solvent-switchable organogel fabricated in this study is a good candidate for extending the field of application of gel materials.



中文翻译:

使用两组分有机溶剂调节聚丙烯酰胺/ Ca(OH)2纳米复合有机凝胶的弹性和温度耐受性

关于增强型聚合物凝胶的大多数研究都着眼于改变聚合物基质与填料之间的相互作用。在这里,提出了一种新的策略,用于制造新型的聚丙烯酰胺/ Ca(OH)2具有可调节的机械性能和温度耐受性的纳米复合有机凝胶。通过改变溶剂组分,可以在不添加其他增强剂的情况下调节有机凝胶的性能。以两种不同的重量比(GL:EG = 100:0、70:30、50:50、30:70、0:100)使用两种常用的有机溶剂,甘油(GL)和乙二醇(EG)调节有机凝胶的性质。在25°C时,可将95%应变下的抗压强度调节在18-29 MPa的范围内,并且在-25°C-110°C的温度范围内可将其抗压强度保持在12-46 MPa的范围内。具有较高沸点的GL的比例增加,有机凝胶的高低温耐受性显着增强。EG起到润滑剂的作用,并将拉伸回复率从77%提高到84%。全面的,当GL:EG比为70:30时,有机凝胶的性能最佳。在这项研究中制造的可溶剂转换的有机凝胶是扩展凝胶材料应用领域的良好候选者。

更新日期:2020-12-31
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