PapersFlow Research Brief
Aerogels and thermal insulation
Research Guide
What is Aerogels and thermal insulation?
Aerogels and thermal insulation refer to ultralight, nanoporous materials produced by sol-gel processing and supercritical drying, prized for their exceptional low thermal conductivity that enables superior insulation performance.
Aerogels encompass silica and carbon variants synthesized through sol-gel methods, exhibiting high porosity and low density critical for thermal insulation applications. The field includes 29,137 papers focused on their chemistry, properties, and uses in nanocomposites and drug delivery. Key works such as 'Chemistry of Aerogels and Their Applications' by Pierre and Pajonk (2002) detail their synthesis and diverse applications.
Topic Hierarchy
Research Sub-Topics
Silica Aerogels for Thermal Insulation
Researchers optimize sol-gel synthesis, ambient pressure drying, and surface modification to achieve ultra-low thermal conductivity in silica aerogels for building envelopes and aerospace. Studies characterize hydrophobicity, mechanical strength, and fire resistance.
Carbon Aerogels Synthesis and Supercapacitors
This sub-topic covers pyrolysis of resorcinol-formaldehyde gels, activation for high surface area, and electrode fabrication for EDLCs with focus on capacitance, rate capability, and cycling stability. Doping and heteroatom incorporation enhance performance.
Aerogel Nanocomposites for Mechanical Reinforcement
Studies integrate polymers, fibers, and nanoparticles into aerogel matrices to improve compressive modulus and brittleness while preserving porosity, using techniques like freeze-drying and EPD. Applications target impact-resistant insulators.
Biodegradable Aerogels for Drug Delivery
Researchers develop polysaccharide and protein-based aerogels as carriers for controlled release, studying swelling kinetics, encapsulation efficiency, and burst prevention in simulated physiological conditions. Targeted delivery systems are emphasized.
Aerogels in Environmental Remediation
This area explores adsorption of oils, heavy metals, and CO2 using functionalized aerogels, evaluating selectivity, regeneration cycles, and kinetics in wastewater and air purification. Hybrid organic-inorganic designs enhance performance.
Why It Matters
Aerogels provide thermal insulation with thermal conductivities as low as 0.01 W/m·K, far surpassing traditional materials like fiberglass, due to their nanostructured air-trapping matrix that minimizes conduction, convection, and radiation heat transfer. 'Chemistry of Aerogels and Their Applications' by Alain C. Pierre and Gérard M. Pajonk (2002) outlines their use in industries requiring extreme insulation, such as aerospace for spacecraft thermal protection and building construction for energy-efficient envelopes. For instance, silica aerogels in NASA's Mars Pathfinder demonstrated weight savings of over 90% compared to conventional insulators while maintaining performance under vacuum conditions.
Reading Guide
Where to Start
'Sol-Gel Science: The Physics and Chemistry of Sol-Gel Processing' by C. Jeffrey Brinker and George W. Scherer (1990), as it provides the essential physics and chemistry of sol-gel processing, hydrolysis, gelation, and drying foundational to all aerogel synthesis.
Key Papers Explained
'Sol-Gel Science: The Physics and Chemistry of Sol-Gel Processing' by Brinker and Scherer (1990) establishes sol-gel fundamentals, which 'Chemistry of Aerogels and Their Applications' by Pierre and Pajonk (2002) applies specifically to aerogels' chemistry and thermal insulation uses. 'Coherent Expanded Aerogels and Jellies' by Kistler (1931) introduces the original supercritical drying concept that enables coherent structures. These connect through synthesis evolution: Kistler's empirical method to Brinker/Scherer's theory to Pierre/Pajonk's applications.
Paper Timeline
Most-cited paper highlighted in red. Papers ordered chronologically.
Advanced Directions
Recent preprints are unavailable, but frontiers build on classics like carbon aerogels in 'Carbon-based materials as supercapacitor electrodes' by Zhang and Zhao (2009), suggesting hybrid insulation-energy storage materials. No news coverage in the last 12 months indicates steady progress in synthesis refinements from sol-gel principles.
Papers at a Glance
| # | Paper | Year | Venue | Citations | Open Access |
|---|---|---|---|---|---|
| 1 | Sol-Gel Science: The Physics and Chemistry of Sol-Gel Processing | 1990 | — | 9.4K | ✕ |
| 2 | Carbon-based materials as supercapacitor electrodes | 2009 | Chemical Society Reviews | 7.2K | ✓ |
| 3 | Light-induced amphiphilic surfaces | 1997 | Nature | 3.3K | ✕ |
| 4 | Sol-Gel Science | 1990 | Elsevier eBooks | 3.2K | ✕ |
| 5 | Some aspects of the surface chemistry of carbon blacks and oth... | 1994 | Carbon | 3.0K | ✕ |
| 6 | Synthesis of Highly Ordered Carbon Molecular Sieves via Templa... | 1999 | The Journal of Physica... | 2.4K | ✕ |
| 7 | A New Property of MCM-41: Drug Delivery System | 2000 | Chemistry of Materials | 2.1K | ✕ |
| 8 | Chemistry of Aerogels and Their Applications | 2002 | Chemical Reviews | 2.1K | ✕ |
| 9 | Nanocomposite Hydrogels: A Unique Organic–Inorganic Network St... | 2002 | Advanced Materials | 2.1K | ✓ |
| 10 | Coherent Expanded Aerogels and Jellies | 1931 | Nature | 2.0K | ✓ |
Frequently Asked Questions
What is the primary synthesis method for aerogels used in thermal insulation?
Aerogels are synthesized via sol-gel processing followed by supercritical drying to preserve the nanoporous structure. 'Sol-Gel Science: The Physics and Chemistry of Sol-Gel Processing' by C. Jeffrey Brinker and George W. Scherer (1990) describes hydrolysis and condensation of silicates to form particulate sols and gels. This method yields materials with porosities exceeding 99% essential for low thermal conductivity.
How do aerogels achieve low thermal conductivity for insulation?
Aerogels trap air in a nanostructured silica or carbon network, suppressing solid conduction, gas convection, and infrared radiation. 'Chemistry of Aerogels and Their Applications' by Alain C. Pierre and Gérard M. Pajonk (2002) explains that their high porosity and small pore sizes (under 50 nm) result in thermal conductivities below 0.02 W/m·K. This outperforms polyurethane foams by factors of 2-3 in many conditions.
What are key applications of aerogels beyond thermal insulation?
Aerogels serve as biodegradable carriers in drug delivery systems and electrodes in supercapacitors. 'A New Property of MCM-41: Drug Delivery System' by María Vallet‐Regí et al. (2000) shows MCM-41 mesoporous silica releasing ibuprofen with controlled kinetics after loading up to 20 wt%. Carbon aerogels, as in 'Carbon-based materials as supercapacitor electrodes' by Lili Zhang and Xin Zhao (2009), provide high surface areas over 1000 m²/g for energy storage.
Which paper provides the foundational theory of aerogel formation?
'Sol-Gel Science: The Physics and Chemistry of Sol-Gel Processing' by C. Jeffrey Brinker and George W. Scherer (1990) covers hydrolysis, gelation, aging, drying, and structural evolution. It details nonsilicate and silicate chemistry for particulate sols and gels. The work has garnered 9412 citations for its comprehensive treatment.
What properties make silica aerogels suitable for thermal insulation?
Silica aerogels offer densities below 0.01 g/cm³, porosities above 99%, and thermal conductivities around 0.015 W/m·K at ambient conditions. 'Coherent Expanded Aerogels and Jellies' by S. S. Kistler (1931) first demonstrated their production via supercritical drying to avoid collapse. These traits enable applications in passive insulation for extreme environments.
How has the field of aerogels grown in publications?
The topic comprises 29,137 papers on aerogels, synthesis, properties, and applications including thermal insulation. Top-cited works like 'Sol-Gel Science: The Physics and Chemistry of Sol-Gel Processing' (9412 citations) anchor the foundational research. No specific 5-year growth rate is available, but citation trends indicate sustained interest.
Open Research Questions
- ? How can aerogel mechanical fragility be overcome for large-scale thermal insulation panels without compromising porosity?
- ? What modifications to silica aerogels minimize infrared opacity to further reduce thermal conductivity below 0.01 W/m·K?
- ? Can hybrid carbon-silica aerogels combine supercapacitor performance with insulation properties for multifunctional energy systems?
- ? What synthesis parameters optimize pore size distribution in aerogels for enhanced gas adsorption alongside insulation?
- ? How do aging and drying conditions affect long-term thermal stability of aerogels in building envelopes?
Recent Trends
The field maintains 29,137 papers with no specified 5-year growth rate, reflecting established interest in aerogels for thermal insulation.
High-citation persistence in 'Sol-Gel Science: The Physics and Chemistry of Sol-Gel Processing' by Brinker and Scherer (1990, 9412 citations) and 'Chemistry of Aerogels and Their Applications' by Pierre and Pajonk (2002, 2115 citations) shows foundational works driving current synthesis.
No recent preprints or news in the last 12 months available.
Research Aerogels and thermal insulation with AI
PapersFlow provides specialized AI tools for Chemistry researchers. Here are the most relevant for this topic:
AI Literature Review
Automate paper discovery and synthesis across 474M+ papers
Paper Summarizer
Get structured summaries of any paper in seconds
Deep Research Reports
Multi-source evidence synthesis with counter-evidence
Code & Data Discovery
Find datasets, code repositories, and computational tools
See how researchers in Chemistry use PapersFlow
Field-specific workflows, example queries, and use cases.
Start Researching Aerogels and thermal insulation with AI
Search 474M+ papers, run AI-powered literature reviews, and write with integrated citations — all in one workspace.
See how PapersFlow works for Chemistry researchers