Abstract
Basalt cotton (BC) has a cotton-like structure due to the three-dimensional skeleton built by basalt fiber overlapping, which exhibit high flexibility. To explore the application of BC, hollow silica spheres (HSSs) were planted on the three-dimensional skeleton of BC by combining a sol–gel method and a sacrificial template method, to obtain HSS/BC composites. Scanning electron microscopy revealed that HSSs were successfully adhered to the three-dimensional skeleton of BC and retained 69% adhesion ratio under magnetic vibration at a certain frequency. HSS/BC composites with a thermal conductivity of 0.042 W/m·K were a promising choice for flexible thermal insulation.
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