Mechanical properties of monolithic silica aerogels made from polyethoxydisiloxanes

Wong, J.; Kaymak, Hicret; Brunner, Samuel; Koebel, Matthias M.

doi:10.1016/j.micromeso.2013.08.029

Cited by 225 publications

(179 citation statements)

References 27 publications

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“…The fracture behavior of stiff and flexible aerogels was investigated. The results show the lower the density, the higher the flexibility, which is in agreement with a previous study on silica aerogels [19].…”

Section: Introductionsupporting

confidence: 92%

From hard to rubber-like: mechanical properties of resorcinol–formaldehyde aerogels

et al. 2015

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Four types of resorcinol-formaldehyde (RF) aerogels, stiff, brittle, low-flexible, and super-flexible are studied in this work. Despite several studies on mechanical properties on RF aerogels their response when exposed to compressive loading and their fracture behavior are not well investigated. Here, we cover aerogels with a very broad density range of 0.08-0.3 g cm -3 and compressive moduli from 0.12 to 28 MPa. We relate the microstructure of the synthesized aerogels and their behavior under uniaxial compression. Additionally, this work is the first, to our knowledge, to implement the usage of digital image correlation for characterizing the deformation of RF aerogels. The comparison of surface strain distribution of four types of aerogels provides an insight to their reaction on compressive loading.

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Section: Introductionsupporting

confidence: 92%

From hard to rubber-like: mechanical properties of resorcinol–formaldehyde aerogels

et al. 2015

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“…[2] However,the widespread use of silica aerogels has been prevented by their poor mechanical properties [3] and concerns about dust release.…”

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confidence: 99%

“…Them echanical reinforcement at pH 1.5 is also evident from the BET isotherms ( Figure S5 a): the hybrid materials present almost no mechanical-deformation-induced hysteresis,w hich indicates that the hybrids maintain their morphological integrity during liquid nitrogen desorption. [3] Another major advantage of the pectin-silica hybrids is their limited dust release,w hich is lower than that of the . .…”

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confidence: 99%

Strong, Thermally Superinsulating Biopolymer–Silica Aerogel Hybrids by Cogelation of Silicic Acid with Pectin

et al. 2015

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International audienceSilica aerogels are excellent thermal insulators, but their brittle nature has prevented widespread application. To overcome these mechanical limitations, silica–biopolymer hybrids are a promising alternative. A one-pot process to monolithic, superinsulating pectin–silica hybrid aerogels is presented. Their structural and physical properties can be tuned by adjusting the gelation pH and pectin concentration. Hybrid aerogels made at pH 1.5 exhibit minimal dust release and vastly improved mechanical properties while remaining excellent thermal insulators. The change in the mechanical properties is directly linked to the observed “neck-free” nanoscale network structure with thicker struts. Such a design is superior to “neck-limited”, classical inorganic aerogels. This new class of materials opens up new perspectives for novel silica–biopolymer nanocomposite aerogels

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“…The monolithic samples with a desired shape can be obtained simply by cutting with a knife without fracture (Figures 6a,b and S9), which has never been reported in other transparent aerogel materials. The flexibility of PVPSQ, PAPSQ, PVPMS, and PAPMS aerogels and xerogels is significantly higher than that of traditional silica 9 and metal oxide aerogels. 40 In particular, the superflexibility of PVPMS and PAPMS aerogels/xerogels has not been observed in recently reported aerogels such as PMSQ, 15 PVSQ, 16 organo-bridged polysiloxanes, [18][19][20] nanocellulose, 22,23 chitosan, 24 polymer 3,27 and silica-based organic-inorganic hybrid aerogels.…”

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confidence: 88%

Versatile Double-Cross-Linking Approach to Transparent, Machinable, Supercompressible, Highly Bendable Aerogel Thermal Superinsulators

et al. 2018

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ABSTRACT:A facile yet versatile approach to transparent, highly flexible, machinable, superinsulating organic-inorganic hybrid aerogels and xerogels is presented. This method involves radical polymerization of a single alkenylalkoxysilane to obtain polyalkenylalkoxysilane, and subsequent hydrolytic polycondensation to afford a homogeneous, doubly cross-linked nanostructure consisting of polysiloxanes and hydrocarbon polymer units.Here we demonstrate that novel aerogels based on polyvinylpolysilsesquioxane (PVPSQ),

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Mechanical properties of monolithic silica aerogels made from polyethoxydisiloxanes

Cited by 225 publications

References 27 publications

From hard to rubber-like: mechanical properties of resorcinol–formaldehyde aerogels

From hard to rubber-like: mechanical properties of resorcinol–formaldehyde aerogels

Strong, Thermally Superinsulating Biopolymer–Silica Aerogel Hybrids by Cogelation of Silicic Acid with Pectin

Versatile Double-Cross-Linking Approach to Transparent, Machinable, Supercompressible, Highly Bendable Aerogel Thermal Superinsulators

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