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首页> 外文期刊>RSC Advances >Effect of NaCl concentration on stability of a polymer–Ag nanocomposite based Pickering emulsion: validation via rheological analysis with varying temperature
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Effect of NaCl concentration on stability of a polymer–Ag nanocomposite based Pickering emulsion: validation via rheological analysis with varying temperature

机译：NaCl浓度对基于聚合物-Ag纳米复合材料的粘性乳液的稳定性的影响：通过改变温度流变分析验证

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摘要

The utility of a Pickering emulsion (PEm) under saline conditions is strongly dependent on the stability of the emulsion in the presence of different salt concentrations. In this study, we have evaluated the effect of NaCl and temperature on the stability of a polyacryloyl hydrazide (PAHz)–Ag nanocomposite (NC) based PEm utilizing ocular observation, an optical microscope with a thermal stage, TGA, DLS, electrical conductivity, and rheological studies at different temperatures. The creaming stability of PEm in the presence of salt concentrations in the range of 0.5 to 5.0 wt% was evaluated by adding different amounts of PAHz–Ag NC stabilizer. The effect of NaCl on emulsion stability is strongly dependent on the aggregation behaviour of the nanocomposites, showing signs of aggregation at low NaCl concentration ( 3 wt%). As per the microscopy analysis, 25 wt% of PAHz–Ag NC was sufficient to stabilize the PEm for a period of up to 7 days in the presence of salt concentrations up to 3 wt% in the aqueous layer at 95 °C. Thus, the balance of ionic strength provides an important insight into the nature of nanocomposite interactions in emulsion systems and a possible mechanism for designing emulsion properties via salt inclusion.
机译：在盐水条件下，皮克林乳液（PEM）的效用强烈取决于乳液在不同盐浓度存在下的稳定性。在该研究中，我们已经评估了NaCl和温度对利用眼睛观察的多丙烯酰酰肼（PAHZ）-AG纳米复合材料（NC）PEM的稳定性的影响，光学显微镜具有热级，TGA，DLS，导电性，不同温度的流变研究。通过添加不同量的PahZ-Ag NC稳定剂，评价在0.5至5.0wt％的盐浓度存在下的PEM的乳膏稳定性。 NaCl对乳液稳定性的影响强烈依赖于纳米复合材料的聚集行为，显示低NaCl浓度（3wt％）的聚集迹象。根据显微镜分析，在95℃下在水层中，25wt％的Pahz-Ag nc在盐浓度下稳定在高达3wt％的盐浓度上最多7天的时间。因此，离子强度的平衡提供了对乳液系统中纳米复合物相互作用的性质的重要见解以及通过盐包裹物设计乳液性能的可能机制。

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