Nanostructured interpenetrated organic-inorganic aerogels with thermal superinsulating properties
Source abstract
Abstract
Organic-inorganic composite aerogels were synthesized via a facile one-step impregnation of a wet hydrophobic cellulose II matrix with polyethoxydisiloxane solution followed by in situ NH4OH-catalysed formation of a nanostructured mesoporous silica network. The silica phase was subsequently hydrophobised with hexamethyldisilazane. By tuning synthesis conditions, organic-inorganic composite aerogels with various morphology (from meso- to macroporous), specific surface area (from 200 to 850 m2/g) and hydrophilic-hydrophobic balance (from fully hydrophilic to highly hydrophobic) were prepared after supercritical CO2 drying. The obtained organic-inorganic aerogels are monolithic, resistant to humidity and thermally superinsulating with the thermal conductivity 0.021–0.022 W/(m·K) in room conditions
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Aerogels and thermal insulation · Mesoporous Materials and Catalysis · Carbon dioxide utilization in catalysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (38)
Show source-provided references
1. Organic aerogels from polycondensation of resorcinol with formaldehyde10.1007/BF01139044 ↗
2. Polyurethane-based organic aerogels' thermal performance10.1016/S0022-3093(98)00103-3 ↗
3. Polyurethane aerogels synthesis for thermal insulation - textural, thermal and mechanical properties10.1016/j.supflu.2015.05.012 ↗
4. Physical properties of silica gels and aerogels prepared with new polymeric precursors10.1016/0022-3093(95)00210-3 ↗
5. Aerogel-based thermal superinsulation: an overview10.1007/s10971-012-2792-9 ↗
6. Thermal conductivity of monolithic organic aerogels10.1126/science.255.5047.971 ↗
7. Aeropectin: fully biomass-based mechanically strong and thermal super-insulating aerogel10.1021/bm500345u ↗
8. Aerogels with 3D ordered nanofiber skeletons of liquid-crystalline nanocellulose derivatives as tough and transparent insulators10.1002/anie.201405123 ↗
9. Synthesis of flexible silica aerogels using methyltrimethoxysilane (MTMS) precursor10.1016/j.jcis.2006.03.044 ↗
10. An overview on silica aerogels synthesis and different mechanical reinforcing strategies10.1016/j.jnoncrysol.2013.10.017 ↗
11. Structure–property relationships in porous 3D nanostructures: epoxy-cross-linked silica aerogels produced using ethanol as the solvent10.1021/am900014z ↗
12. Isocyanate-crosslinked silica aerogel monoliths: preparation and characterization10.1016/j.jnoncrysol.2004.06.041 ↗
13. Synergistic hybrid organic−inorganic aerogels10.1021/am401717s ↗
14. Strong, thermally superinsulating biopolymer–silica aerogel hybrids by cogelation of slicic acid with pectin10.1002/anie.201507328 ↗
15. Effect of sepiolite fiber on the structure and properties of the sepiolite/silica aerogel composite10.1007/s10971-013-3124-4 ↗
16. Thermal conductivity and compressive strain of aerogel insulation blankets under applied hydrostatic pressure10.1115/1.2424237 ↗
17. Flexible aerogels with interpenetrating network structure of bacterial cellulose–silica composite from sodium silicate precursor via freeze drying process10.1039/C4RA02752C ↗
18. Polymethylsilsesquioxane–cellulose nanofiber biocomposite aerogels with high thermal insulation, bendability, and superhydrophobicity10.1021/am501822y ↗
19. Multiscale assembly of superinsulating silica aerogels within silylated nanocellulosic scaffolds: improved mechanical properties promoted by nanoscale chemical compatibilization10.1002/adfm.201404368 ↗
20. Aerocellulose: new highly porous cellulose prepared from cellulose–NaOH aqueous solutions10.1021/bm700972k ↗
21. Aerocellulose from cellulose–ionic liquid solutions: preparation, properties and comparison with cellulose–NaOH and cellulose–NMMO routes10.1016/j.carbpol.2010.10.043 ↗
22. Wet and dry highly porous cellulose beads from cellulose–NaOH–water solutions: influence of the preparation conditions on beads shape and encapsulation of inorganic particles10.1007/s10853-010-4809-5 ↗
23. L. Cellulose–silica nanocomposite aerogels by in situ formation of silica in cellulose gel10.1002/anie.201105730 ↗
24. High strength cellulose aerogels prepared by spatially confined synthesis of silica in bioscaffolds10.1016/j.colsurfa.2012.11.020 ↗
25. Cellulose–silica aerogels10.1016/j.carbpol.2015.01.022 ↗
26. Diffusion during the supercritical drying of silica gels10.1080/07373930600778270 ↗
27. Nitrogen sorption in aerogels10.1016/S0022-3093(01)00449-5 ↗
28. Correlation between thermal conductivity and elasto-mechanical properties of compressed porous media
29. Intercomparison of thermal conductivity measurements on an expanded glass granulate in a wide temperature range10.1016/j.ijthermalsci.2015.04.004 ↗
30. The hot-wire method applied to porous materials of low thermal conductivity
31. Effect of different trimethyl silylating agents on the hydrophobic and physical properties of silica aerogels10.1016/j.apsusc.2008.04.109 ↗
32. 4-methoxy substituted trityl groups in 6-O protection of cellulose: homogeneous synthesis, characterization, detritylation10.1002/macp.1996.021970316 ↗
33. Xerocellulose: lightweight, porous and hydrophobic cellulose prepared via ambient-drying10.1007/s10853-015-9002-4 ↗
34. Effective thermal conductivity of divided silica xerogel beds10.1016/j.jnoncrysol.2004.08.238 ↗
35. Influence of processing parameters on regeneration kinetics and morphology of porous cellulose from cellulose-NaOH-water solutions10.1007/s10570-009-9287-z ↗
36. Cellulosic aerogels as ultra-lightweight materials part 2: synthesis and properties10.1515/HF.2009.002 ↗
37. Cellulose-silica composite aerogels from “one-pot” synthesis10.1007/s10570-014-0314-3 ↗
38. Iler · 1979