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首页> 外文期刊>International Journal of Engineering Research and Applications >Transport properties of Gum mediated synthesis of Indium Oxide (In2O3) Nano fluids
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Transport properties of Gum mediated synthesis of Indium Oxide (In2O3) Nano fluids

机译：胶介导的氧化铟（In 2 O 3 ）纳米流体合成的输运性质

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Two- Step method has been applied to prepare stable (In2O3) nano fluids in Ethylene Glycol with PVP (Polyvinyl pyrrolidone) used as stabilizing agent having (In2O3) concentrations of 1% by volume, where the (In2O3) nano particles are obtained by biosynthesis of Indium (III) Acetyl Acetonate and Gum Acacia. Since the two-step method is more versatile as it provides the opportunity to disperse a wide variety of nano particles in different types of base fluids. The nano fluids were characterised by UV-vis spectroscopy, FTIR, SEM, EDAX, and TEM, and systematically investigated for Thermal conductivity (TC), density, viscosity, specific gravity and electrical conductivity for different polymer concentrations. The size of nano particles was found to be in the range of 5-30nm for two different nano particle to PVP ratios. For higher concentration of polymer in nano fluid, nano particles were 20nm in size showing increase in Thermal conductivity but a decrease in density and viscosity which is due to the polymer structure around nano particles. It is observed that the viscosity, density & specific gravity increases with the increase in PVP concentration and decreases with temperature. The thermal conductivity measurements of nano fluids show substantial increment relative to the base fluid (Ethylene glycol). Effect of PVP Polymer on viscosity, density, specific gravity can have a significant effect on magnitude and behaviour of the Thermal conductivity enhancement confirming the Newtonian behaviour of nano fluid. This offers tremendous scope for developing compact and effective heat transfer equipment. An enhancement of 20-25% for 1:5 volume concentration are observed at an average voltage of 60V when compared with EG (Ethylene glycol) at the same voltage. This method is simple, fast and reliable for the synthesis of Newtonian nano fluids containing (In2O3) nano particles.
机译：采用两步法在乙二醇中制备稳定的（In 2 O 3 ）纳米流体，其中PVP（聚乙烯吡咯烷酮）作为稳定剂，具有（In 2 O 3 ）浓度为1％（体积），其中（In 2 O 3 ）纳米颗粒通过乙酰丙酮铟（III）和阿拉伯树胶的生物合成。由于两步法更具通用性，因为它提供了将各种各样的纳米粒子分散在不同类型的基础流体中的机会。通过紫外可见光谱，FTIR，SEM，EDAX和TEM对纳米流体进行了表征，并针对不同的聚合物浓度系统地研究了其导热系数（TC），密度，粘度，比重和电导率。对于两种不同的纳米颗粒与PVP的比率，发现纳米颗粒的尺寸在5-30nm的范围内。对于纳米流体中较高的聚合物浓度，纳米颗粒的尺寸为20nm，显示出热导率增加，但是密度和粘度降低，这归因于纳米颗粒周围的聚合物结构。可以看出，粘度，密度和比重随PVP浓度的增加而增加，随温度的降低而减小。纳米流体的热导率测量结果显示相对于基础流体（乙二醇）有显着增加。 PVP聚合物对粘度，密度，比重的影响可能对导热系数的大小和行为产生重大影响，从而证实了纳米流体的牛顿行为。这为开发紧凑而有效的传热设备提供了广阔的空间。与相同电压下的EG（乙二醇）相比，在60V的平均电压下，体积浓度为1：5时，可以提高20-25％的浓度。该方法简便，快速，可靠，可用于合成含有（In 2 O 3 ）纳米粒子的牛顿纳米流体。

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