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Viscoelastic and electrical properties of RGO reinforced phenol formaldehyde nanocomposites
Journal of Applied Polymer Science ( IF 3 ) Pub Date : 2020-03-28 , DOI: 10.1002/app.49211
Pattoorpady Krishnan Sandhya 1 , M. S. Sreekala 2 , Guijun Xian 3 , Moothetty Padmanabhan 1, 4 , Nandakumar Kalarikkal 5 , Sabu Thomas 1
Affiliation  

Graphene oxide was reduced (RGO) by naturally abundant potato starch and incorporated in phenol formaldehyde resin (PF). The PF/RGO nanocomposites were successfully fabricated by the combination of solution processing and compression molding. Here, nanocomposites composed of 0.05 wt% to 1 wt% RGO were prepared. The incorporation of RGO into the PF matrix was significantly affecting the dynamic mechanical characteristics of the nanocomposites such as storage and loss modulus and tan δ . The degree of entanglement (N ), effectiveness of filler (β f ), reinforcement efficiency factor (r ), cross‐link density (v c ), and adhesion factor (A ) were evaluated from the modulus values. Besides, the phase behavior of the nanocomposites was analyzed with help of Cole–Cole plot. The electrical properties of the nanocomposites have been studied concerning change in filler loading and frequency. The dielectric constant (ε ′), dielectric loss (ε ″) and conductivity were increased with increase in wt% of filler for the entire range of frequencies (20 Hz to 30 MHz) and the results showed that the electrical conductivity of the nanocomposites can be explained by percolation theory. The Maxwell‐Garnet model was employed to calculate the theoretical dielectric constant of PF/RGO nanocomposites.

中文翻译:

RGO增强酚醛纳米复合材料的粘弹性和电学性质

天然的马铃薯淀粉将氧化石墨烯还原(RGO),并掺入酚醛树脂(PF)中。PF / RGO纳米复合材料是通过溶液加工和压塑相结合而成功制备的。在此,制备了由0.05重量%至1重量%的RGO组成的纳米复合材料。RGO的掺入PF基质显著影响纳米复合材料,如存储和损耗模量和tanδ的动态机械特性δ。缠绕程度(Ñ),填料的效率(β ˚F),加固效率因子([R ),交联密度(v Ç),和粘附因子(由模量值评估)。此外,借助科尔-科尔图分析了纳米复合材料的相行为。已经研究了纳米复合材料的电学性质,涉及填料含量和频率的变化。介电常数(ε '),介电损耗(ε “)和电导率与填料为频率(20赫兹到30 MHz)的整个范围内的重量%增加而增加,并且结果表明,纳米复合材料的导电性可以由渗流理论解释。用Maxwell-Garnet模型计算PF / RGO纳米复合材料的理论介电常数。
更新日期:2020-03-28
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