The cotton fiber batt is one of the most commonly used thermal insulator in our lives at room temperature because of its flexible and porous structure. The SiC nanofibers have excellent mechanical, physical, and chemical properties such as high mechanical strength and modulus, low density, high-temperature resistance, which is a promising material for high temperature structural materials or thermal insulator. In this work, a flexible SiC nanofiber batt was fabricated from the cotton fiber batt by sol-gel carbothermal reduction reaction. The fluffy carbonized porous cotton batt was used as a template for the fabrication of sponge-liked SiC nanofiber batt composed of single crystalline β-SiC fibers. It exhibits good compressive flexibility, ultra-high porosity (a specific surface area was 30.90 m²/g), excellent high-temperature stability (ranging from −196 °C in liquid nitrogen to 1300 °C under the flame of butane blowtorch) and low thermal conductivity (0.02 W/(m·K) at room temperature). The SiC nanofiber batt, which has low density, excellent high-temperature resistance and oxidation resistance, is a promising material for high-temperature structural materials or thermal insulators under extreme conditions. The facile fabrication method of SiC nanofiber batt from common cotton batt provides a novel technique for economic industrial production of high temperature thermal insulation material.

中文翻译：

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棉纤维毡制备碳化硅纳米纤维毡的防火隔热性能

棉纤维毡因其柔韧、多孔的结构，是我们常温生活中最常用的隔热材料之一。 SiC纳米纤维具有机械强度和模量高、密度低、耐高温等优异的机械、物理和化学性能，是一种很有前景的高温结构材料或绝热材料。在这项工作中，通过溶胶-凝胶碳热还原反应由棉纤维毡制备了柔性碳化硅纳米纤维毡。以蓬松的碳化多孔棉絮为模板，制备由单晶β-SiC纤维组成的海绵状SiC纳米纤维絮。它具有良好的压缩弹性、超高的孔隙率（比表面积为30.90平方米/克）、优异的高温稳定性（液氮中-196℃到丁烷喷灯火焰下的1300℃）和低导热系数（室温下0.02 W/(m·K)）。 SiC纳米纤维毡密度低、耐高温和抗氧化性能优异，是一种很有前景的极端条件下高温结构材料或隔热材料。以普通棉絮为原料制备碳化硅纳米纤维絮的简便方法，为高温绝热材料的经济工业化生产提供了一种新技术。