Properties improvement of linear polyimide aerogels via formation of doubly cross-linked polyimide-polyvinylpolymethylsiloxane network structure
Source abstract
Abstract
Abstract The properties of linear polyimide aerogels (LPAs) were improved by introducing the network structure of polyvinylpolymethylsiloxane (PVPMS) into that of LPAs. The formed doubly cross-linked polyimide (PI)-PVPMS network structure endowed samples with resilience and fire-retardant property. On the one hand, the PI-PVPMS composite aerogels (PPCAs) can recover to 20% of their own height rather than exhibit almost no resilience after compression. On the other hand, they can maintain high structural integrity instead of showing drastic volume shrinkage after prolonged burning. Moreover, our results showed that the introduced network structure of PVPMS not only weakened the effect of PI rigidity on the structural properties of LPAs, but also played a leading role in the physical properties of synthesized PPCAs. The obtained PPCAs with different PI rigidity exhibited similar microstructure and properties, which indicated that the lower cost monomers of PI could be selected to prepare PPCAs and promote the large-scale production.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Aerogels and thermal insulation · Silicone and Siloxane Chemistry · Surface Modification and Superhydrophobicity
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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