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Results for “aerogel”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 127 records · Page 7
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Method to produce colorless, high porosity, transparent polymer aerogels

A method to produce a polymer gel includes dissolving precursors in a solvent to form a precursor solution, the precursors including polymer precursors, a stable free radical, one or more initiating radicals, and one or more stable free radical control agents, and heating the precursor solution to a temperature of polymerization to produce a cross-linked gel. A dried polymer aerogel has a Brunauer-Emmett Teller (BET) surface area over 100 m2/g, porosity of greater than 10%, visible transparency greater than 20%, color rendering index of over 20%, and average pore size of less than 100 nm.

Chintapalli, Mahati↗
DOE OSTI2022

Large scale synthesis of resorcinol-formaldehyde aerogel

A product includes an aerogel having a single bulk structure, the single bulk structure having at least one dimension greater than 10 millimeters. The single bulk structure includes a plurality of pores, where each pore has a largest diameter defined as a greatest distance between pore walls of the respective pore. In addition, an average of the largest diameters of a majority of the pores is within a specified range, and the plurality of pores are distributed substantially homogenously throughout the single bulk structure.

Loeb, Colin↗
DOE OSTI2024

Base-catalyzed sol-gel inks for direct ink writing of high resolution hierarchically porous carbon aerogels

According to one aspect of an inventive concept, an ink includes a base catalyst, a sol gel precursor composition, and a block copolymer. According to another aspect of an inventive concept, an aerogel includes a three-dimensional printed structure having printed ligaments geometrically arranged, where an average diameter of the printed ligaments is in a range of greater than 0 microns and less than 50 microns. In addition, an average distance between a center of a first of the printed ligaments and a center of a second of the printed ligaments is at least equal to the average diameter of the printed ligaments, where the first and the second of the printed ligaments are adjacent. Each printed ligament includes of a plurality of random pores, where an average diameter of the random pores is less than 50 nanometers.

Zhu, Cheng↗
DOE OSTI2024

Ultralight conductive metallic aerogels

In accordance with one aspect of the presently disclosed inventive concepts, a metal aerogel includes a plurality of metal nanowires formed into a porous three-dimensional structure, where pores in the structure are anisotropic.

Qian, Fang↗
DOE OSTI2022

Formulation of PI Aerogels with 3-D Printing Applications

Polyimide-based films were produced with 3-D printing capability consisting of TDI and PMDA monomers with acrylate functionality. The polymer was synthesized using a standard condensation with diisocyanate and dianhydride heated to 95⁰C under water free conditions. This method is relatively fast, cost effective and far more synthetically simple compared to diamine condensations seen in literature. Considering how crucial proper grafting of functional groups was in hierarchy application, various formulation variables were screened. Lastly, films were produced with PI material and the physical and chemical properties were examined using microscope imaging and UV-Vis Spectroscopy. The material was proven to have relatively fast cure times (5-10 minutes) and the films were shown to have long term stability.

36 MATERIALS SCIENCE↗