Abstract

The titanium glycolate colloids nanoparticle [TiO₂-EG]^NP is synthesized at pH ≅ 7, using solgel polymerization mothed. The polymerization method is accomplished in ethylene glycol solution as a soft template at 298 K. The polymerization technique to the production of [TiO₂-EG]^NP. The resulting [TiO₂-EG]^NP are investigated by various methods involving FTIR and XRD. The thickness of fabricated [TiO₂-EG]^NP thin film is (75 ± 5 nm) by using spin coater (SPIN150) with a speed rate of 2000 rpm/30 s. Numerical calculations are accomplished to study the heat transfer features of dilute TiO₂-EG nanofluid under diverse NP volume fraction and temperature values. An enhancement of 8.7% in thermal conductivity was observed with 0.2 vol% TiO₂-EG nanofluid. The overall heat transfer rate is observed which improves with increasing NP volume concentration and temperature. The experimental results, DFT, and numerical calculations are noticed reasonably consistently. The coolant surface heat transfer rate has been increased by approximately 24% by 2% TiO₂-EG nanofluid at the same temperature level, which could be attributable to enhanced thermal conductivity and improved free convection due to a reduction in viscosity. Our results show that the nanofluid TiO₂-EG provides liquid coolants but is also more heat-specific and therefore suitable for energy management.

Graphic abstract

The electron density of [TiO₂-EG]^NP and TEM image of TiO₂ particles powder.

中文翻译：

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大表面TiO 2的合成，DFT计算和传热性能：乙二醇纳米流体和冷却剂应用

摘要

采用溶胶凝胶聚合法，在pH = 7的条件下合成乙醇酸钛胶体纳米颗粒[TiO ₂ -EG] ^NP。该聚合方法是在乙二醇溶液中于298 K的软模板下完成的。聚合技术用于制备[TiO ₂ -EG] ^NP。通过涉及FTIR和XRD的各种方法研究了所得的[TiO ₂ -EG] ^NP。通过使用旋涂机（SPIN150）以2000 rpm / 30 s的速度制造的[TiO ₂ -EG] ^NP薄膜的厚度为（75±5 nm）。通过数值计算研究了稀TiO ₂的传热特性-EG纳米流体在不同的NP体积分数和温度值下。用0.2体积％的TiO ₂ -EG纳米流体观察到热导率提高了8.7％。观察到总的传热速率，其随着NP体积浓度和温度的增加而提高。实验结果，DFT和数值计算被合理一致地注意到。在相同的温度水平下，通过2％TiO ₂ -EG纳米流体，冷却剂表面的传热速率已提高了约24％，这可归因于由于降低了粘度而提高了导热性和改善了对流。我们的结果表明，纳米流体TiO ₂-EG提供液体冷却剂，但还具有更多的热特性，因此适合能源管理。

图形摘要

[TiO ₂ -EG] ^NP的电子密度和TiO ₂颗粒粉末的TEM图像。