Co-polyimide aerogel using aromatic monomers and aliphatic monomers as mixing diamines
Source abstract
Abstract
A novel co-polyimide aerogel using aromatic monomers (4,4′-diaminodiphenyl ether, ODA) and aliphatic monomers (1,3-Diaminopropa) as mixing diamines has been prepared via the sol–gel technique. The effects on the properties (density, shrinkage, surface area, and average pore size) of co-polyimide aerogel have been investigated by changing the molar ratios of mixing diamines. The density of co-polyimide aerogel reaches as low as 0.0448 g cm−3, because of replacing part of ODA (M = 269.5) in the backbone with 1,3-diaminopropa (molecular M = 76.1).The thermal conductivities reach as low as ~0.031 W m−1 K−1 (25 °C), BET surface areas are 331 m2 g−1 and the compressive modulus range from 1.253 to 3.273 MPa. The facile preparation route and low thermal conductivity indicate that co-polyimide aerogels may be ideal candidates for aerospace and thermal insulations.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Aerogels and thermal insulation · Surface Modification and Superhydrophobicity · Silicone and Siloxane Chemistry
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (34)
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