Direct 3D print polyimide aerogels for synergy management of thermal insulation, gas permeability and light absorption

Abstract

Polyimide aerogels with synergy management of thermal insulation, gas permeability and light absorption are printed, and further expanding their applications in buildings, solar steam generation and solar seawater purification.

Chaotropic Effect‐Boosted Thermogalvanic Ionogel Thermocells for All‐Weather Power Generation

“…The single‐walled carbon nanotube (SWNTs)‐coated Al foil improved the thermal difference through the photothermal effect, resulting in a stable ∆T on both sides of the THG‐ionogel (Figure S1, Supporting Information). [ 34–36 ] As a result, the thermocell spontaneously generates electricity without the input of external energy. With effective scalable integration, this foldable and flexible thermocell generates tens of volts of voltage.…”

Fatigue-resistant and thermal insulating polyimide nanofibrous aerogels with temperature-invariant flexibility and nanofiber–lamella crosslinking architecture

“…1,2 Because of their low density, high porosity and low thermal conductivity, aerogels are one of the outstanding candidates for thermal insulation. 3,4 Compared to conventional robust or brittle aerogels, nanobrous aerogels assembled from one-dimensional (1D) nanobers exhibit excellent exibility and have potential applications in curved thermal protection systems such as pipelines and aircra. [5][6][7] However, the lack of a robust crosslinked network endows the above aerogels with poor mechanical performance and structural stability when suffering from large deformation and long-term loading.…”

Piperazine as a Water-Solubilizing Agent for Cross-Linking and Mechanical Enhancements in Freeze-Dried PI Aerogels

“…One effective strategy is using cross-linking agents to build cross-linking networks and increase the structural stability of PI aerogels . For instance, different cross-linking agents like 1,3,5-triaminophenoxybenzene (TAB) − and 1,3,5-benzenetricarbonyl trichloride (BTC) in supercritical processes have produced aerogels with remarkable structural integrity, capable of enduring extensive compression cycles while possessing low density and excellent thermal insulation. The effectiveness of cross-linking agents in improving the structural stability of PI aerogels is further corroborated by using a tris (4-aminophenyl)amine (TPA) in the freeze-drying method.…”