Hassan Hammed H A M, Abd-El-Khalek Dalia E, Abdel Fattah Marwa
Chemistry Department, Faculty of Science, Alexandria University, P.O. 2, Moharram Beck, Alexandria, Egypt.
National Institute of Oceanography and Fisheries, NIOF, Cairo, Egypt.
Sci Rep. 2022 Jun 13;12(1):9722. doi: 10.1038/s41598-022-13564-9.
Self-doped- and nitro-polyanilines have become a widely used strategy to optimize the electronic and vibratory spectra of polymeric building blocks in various applications. We report the synthesis of poly (5-nitro-2-orthanilic acid) by an aniline-initiated oxidative polymerization reaction. The polymer is characterized by spectroscopic techniques, elemental shapes, cyclic voltammetry, electrical conductivity, and microscopic and thermal measurements. The hydrophilic and hydrophobic nature of the supports provided the formation of amphiphilicity as judged by SEM. Thermogravimetric measurements reveal thermal stability up to 500 °C and glass temperature (T) observed at 240 °C. Electrical conductivity decreases as the temperature rises at the different frequencies used, reflecting the semiconducting nature in the extrinsic range, which is characterized by high carriers and low mobility. The presence of these electron residues causes a decrease in efficiency and increases the thermal conductivity. Dielectric measurements have shown that permittivity decreases gradually at lower levels, mainly due to the transport of charging carriers, resulting in higher performance. The testing of the copolymer as a new scale blocker has resulted in moderate to fairly high performance. This effect is attributed to the change in polymer geometry using intramolecular H-bonding group -SOH and a chain polymer in an aqueous medium.
自掺杂和硝基聚苯胺已成为优化各种应用中聚合物构建块的电子和振动光谱的一种广泛使用的策略。我们报道了通过苯胺引发的氧化聚合反应合成聚（5-硝基-2-邻氨基苯甲酸）。该聚合物通过光谱技术、元素形态、循环伏安法、电导率以及微观和热测量进行表征。通过扫描电子显微镜判断，载体的亲水和疏水性质导致了两亲性的形成。热重测量显示热稳定性高达500℃，玻璃化温度（T）在240℃时观察到。在不同使用频率下，电导率随温度升高而降低，反映了在外部范围内的半导体性质，其特征是高载流子和低迁移率。这些电子残留物的存在导致效率降低并增加热导率。介电测量表明，在较低水平下介电常数逐渐降低，主要是由于电荷载流子的传输，从而导致更高的性能。将该共聚物作为一种新型阻垢剂进行测试，结果显示出中等至相当高的性能。这种效果归因于在水性介质中使用分子内氢键基团-SOH和链状聚合物导致的聚合物几何形状的变化。
