Aerogel-based polymer composite foams are promising for large strain piezoresistive sensors, but their aerogel skeleton is partially destroyed during the foaming process, limiting their sensitivity. Herein, the thermoplastic polyurethane was synthesized on the aerogel skeleton to obtain cellulose/multiwalled carbon nanotubes (MWCNTs)/thermoplastic polyurethane (TPU) nanocomposite materials foamed with the aid of supercritical carbon dioxide (ScCO₂). A series of lightweight, high strength, and high sensitivity nanocomposite foams were developed, possessing an average diameter of ~9.11 µm and a cell density of 6.84 × 10⁸ cells/cm³. The mechanical properties, including compressive strength and compressive modulus, were promisingly 5.56 and 28.90 MPa, respectively. Under 50 % strain, apparent high repeatability of force-to-electricity conversion behavior was detected in 100 compression cycles.

基于气凝胶的聚合物复合泡沫有望用于大应变压阻传感器，但它们的气凝胶骨架在发泡过程中被部分破坏，从而限制了它们的灵敏度。在此，在气凝胶骨架上合成热塑性聚氨酯，得到纤维素/多壁碳纳米管（MWCNTs）/热塑性聚氨酯（TPU）纳米复合材料，借助超临界二氧化碳（ScCO ₂）发泡。开发了一系列轻质、高强度、高灵敏度的纳米复合泡沫，平均直径约为 9.11 µm，泡孔密度为 6.84 × 10 ⁸个泡孔/cm ³. 包括抗压强度和压缩模量在内的机械性能分别有望达到 5.56 和 28.90 MPa。在 50% 的应变下，在 100 个压缩循环中检测到力-电转换行为的明显高重复性。