Biodegradable Dual‐Network Chitosan Composite Aerogel by In Situ Mineralization for Substituting Petroleum‐Based Counterparts

, a high limiting oxygen index of 38.1%, and good reversible compressible resilience. Simultaneously, it achieves the complete soil biodegradation within 15 days. It retains over 85% of initial performance after 20 recycling cycles, benefiting from the hydrogen bonding interactions between the dual-network. This work provides a novel strategic approach for preparing high-performance bio-based aerogels to replace the conventional petroleum-based thermal insulation materials, thereby contributing to a carbon neutrality goal.