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Matrimid Aerogels by Temperature‐Controlled, Solution‐Based Crosslinking
Author(s) -
Kuiper Stefan,
Embrechts Anika,
Every Hayley A.,
de Vries Tjerk,
de Smet Louis C. P. M.
Publication year - 2013
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201200335
Subject(s) - aerogel , materials science , polymer , nanometre , chemical engineering , solvent , supercritical fluid , homogeneous , fourier transform infrared spectroscopy , diamine , polymer chemistry , composite material , organic chemistry , chemistry , engineering , physics , thermodynamics
This paper reports on a temperature‐controlled, solution‐based method to prepare diamine crosslinked Matrimid aerogels. Addition of a diamine to a preheated polymer solution resulted in a well‐dispersed solution, allowing formation of a homogeneous gel upon cooling. The gels (studied by FTIR and AFM) were dried by solvent extraction with supercritical CO 2 . The resulting aerogels showed surface areas of approximately 150 m 2 · g −1 and porosities of 0.66–0.69 mL · g −1 with polymer domains and pore sizes of tens of nanometers. A room temperature‐prepared, inhomogeneous aerogel gave approximately 250 m 2 · g −1 and 0.31 mL · g −1 with meso‐ and micropores. SEM images of the aerogels show similar surface features as AFM images of the Matrimid solvent gels.