Nitrile-based nanocomposite heat insulators are very attractive materials, due to their higher deformation bearing in special applications such as high temperature and turbulent media, compared to their non-elastomeric counterparts. Ablation behavior of nitrile rubber-based insulators containing silica and silica-clay aerogels was investigated in comparison with those containing fumed silica. An oxyacetylene flame test under a standard condition with a heat flux of 2500 kW m⁻² for 15 s was used for observation of ablation behavior of the samples. The results showed that the incorporation of 15 phr (part per hundred parts of rubber) silica aerogel into the compound decreased the mass of insulator and its linear ablation rate by 15% and 29%, respectively. The incorporation of 5 wt% organoclay in silica aerogel successfully reduced the linear ablation rate to nearly 41%. The results indicated that the insulation index number (I₈₀) of the insulators increased about 29% and 20%, at this loading levels of silica and silica-clay aerogels, respectively. Therefore, silica aerogel played more effective role in reduction of the back-face temperature of insulators. Modeling of these ablative nanocomposites enables us to determine the exact thickness required for the insulator and the temperature distribution across it at pre-determined thermal conditions. The experimental results confirmed modeling results of the back-face temperature of the insulators.

丁腈基纳米复合绝热材料是非常吸引人的材料，因为与非弹性材料相比，它们在高温和湍流介质等特殊应用中具有更高的变形承受力。与含气相二氧化硅的绝缘子相比，研究了含二氧化硅和二氧化硅粘土气凝胶的丁腈橡胶基绝缘子的消融性能。在标准条件下以2500 kW m ^-2的热通量进行乙炔火焰测试15秒用于观察样品的烧蚀行为。结果表明，将15 phr（每百份橡胶中的橡胶）二氧化硅气凝胶掺入该混合物中，可使绝缘子的质量及其线性消融率分别降低15％和29％。在二氧化硅气凝胶中加入5 wt％的有机粘土可将线性消融率成功降低至近41％。结果表明，绝缘指数值（I ₈₀在二氧化硅和二氧化硅黏土气凝胶的这种负载水平下，绝缘体的）分别增加了约29％和20％。因此，二氧化硅气凝胶在降低绝缘子的背面温度方面发挥了更有效的作用。这些烧蚀性纳米复合材料的模型使我们能够确定绝缘体所需的确切厚度，以及在预定的热条件下其上的温度分布。实验结果证实了绝缘子背面温度的建模结果。