The aim of this research work is to determine the mechanical, morphological and thermal properties of spherical silica (silica-A), amorphous silica (silica-B) and Roselle fiber (RF) reinforced polyurethane (PU) hybrid nanocomposites. The PU nanocomposites were fabricated with different weight percentages, 0.50 to 1 wt% for silica-A and silica-B, while 1–2 wt% for RF. These experiments were systematically designed and analyzed by response surface methodology in a central composite design approach. As per the design of the experiments, the hybrid PU nanocomposites were prepared by using a one shot process. The mathematical models developed to predict the results obtained were in good coherence with the experimental results, and were within 95% confidence levels for tensile and flexural strength. The optimum weight percentage of Roselle, silica-A and silica-B were 2, 0.78 and 1%, respectively. The optimized environmentally friendly hybrid nanocomposite demonstrated exceptional mechanical and thermal properties.

这项研究工作的目的是确定球形二氧化硅（silica-A），无定形二氧化硅（silica-B）和Roselle纤维（RF）增强聚氨酯（PU）杂化纳米复合材料的机械，形态和热性能。PU纳米复合材料的重量百分比不同，二氧化硅A和二氧化硅B为0.50至1 wt％，而RF为1-2 wt％。这些实验是通过响应面方法在中央复合设计方法中进行系统设计和分析的。根据实验的设计，通过使用一次注射法制备了杂化PU纳米复合材料。为预测所得结果而开发的数学模型与实验结果具有良好的一致性，并且抗张强度和抗弯强度的置信度在95％以内。玫瑰茄的最佳重量百分比，二氧化硅-A和二氧化硅-B分别为2、0.78和1％。优化的环保型杂化纳米复合材料具有出色的机械和热性能。