ABSTRACT In this work, a novel nanocomposite was prepared by filling cellulose nanopores with a classical ferroelectric of polycrystalline ammonium sulfate for clarifying its anomalous properties under nanoconfinement conditions and the influence of dielectric matrix. The filler content was estimated as 61 wt%. The experiments were conducted under a weak external electric field (1 V/cm) in the frequency range of 10–106 Hz. The synthesized composite samples were characterized by XRD and FTIR techniques. The embedded ammonium sulfate had a higher phase transition temperature and a lower relaxation frequency in comparison with those of the bulk. The change in the phase transition order was not detected. The influence of the cellulose matrix on nanocrystals of ammonium sulfate is considered as the main reason responsible for the above anomalies.

中文翻译：

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纳米限制条件下硫酸铵在天然纤维素基质中的异常介电特性

摘要在这项工作中，通过用经典的多晶硫酸铵铁电体填充纤维素纳米孔制备了一种新型纳米复合材料，以阐明其在纳米限制条件下的异常性质和介电基质的影响。填料含量估计为61wt%。实验是在 10-106 Hz 频率范围内的弱外部电场 (1 V/cm) 下进行的。通过XRD和FTIR技术对合成的复合样品进行表征。与本体相比，嵌入的硫酸铵具有更高的相变温度和更低的弛豫频率。未检测到相变顺序的变化。纤维素基质对硫酸铵纳米晶体的影响被认为是造成上述异常的主要原因。