Quantitative Evaluation of the Hierarchical Porosity in Polyimide Aerogels and Corresponding Solvated Gels

ACS Applied Materials & Interfaces
Samantha J RinehartMark D Dadmun

Abstract

Aerogels are promising materials for many aerospace applications, including high-performance antennae and flexible insulation, because of their inherent low density and high surface areas. Polymer aerogels, especially polyimide aerogels, provide excellent mechanical properties beyond traditional silica aerogels while maintaining the required thermal stability. Polyimide aerogel surface area, porosity, and pore volume are important properties; however, these measurements are traditionally conducted on the aerogel after removal of the solvent. Because of this, the impact of synthetic control and solvent presence on the nanoscale to mesoscale structure of polyimide aerogels in functional applications is unclear. In this report, we use small-angle neutron scattering to determine the dry and solvated skeletal strut size and composition of polyimide aerogels to deduce the impact of solvation on the structure of complex aerogel struts. Our results show that the aerogel contains a hierarchical assembly of pores, with pores present both within and between the supporting struts. This translates to a material with solvent in the larger pores, as well as absorbed in the supporting polyimide skeleton. The amount of solvent uptake in the str...Continue Reading

References

Mar 4, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Ronald C HeddenBarry J Bauer
Jun 21, 2008·Chemical Reviews·Philippe Hapiot, Corinne Lagrost
Feb 8, 2011·ACS Applied Materials & Interfaces·Haiquan GuoGuilherme Sprowl
Jan 12, 2012·ACS Applied Materials & Interfaces·Mary Ann B MeadorMiko Cakmak
Nov 9, 2012·ACS Applied Materials & Interfaces·Mary Ann B MeadorFélix A Miranda
Feb 4, 2014·ACS Applied Materials & Interfaces·Mary Ann B MeadorFélix A Miranda
Jan 8, 2015·ACS Applied Materials & Interfaces·Mary Ann B MeadorLinda McCorkle
Jul 25, 2017·ACS Applied Materials & Interfaces·Baochau N NguyenLinda McCorkle
Aug 15, 2017·ACS Applied Materials & Interfaces·Chunhao Zhai, Sadhan C Jana
Feb 23, 2019·ACS Applied Materials & Interfaces·Marcos PantojaMary Ann B Meador
Jan 28, 2020·ACS Applied Materials & Interfaces·Stephanie L VivodLinda McCorkle

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Langmuir : the ACS Journal of Surfaces and Colloids
Nicholas Teo, Sadhan C Jana
Journal of Controlled Release : Official Journal of the Controlled Release Society
Zeynep Ulker, Can Erkey
© 2022 Meta ULC. All rights reserved