Facile processing of clays into organically‐modified aerogels

Somlai, Louis S.; Bandi, Suneel; Schiraldi, David A.; Mathias, Lon J.

doi:10.1002/aic.10710

Cited by 69 publications

(77 citation statements)

References 28 publications

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“…e lamellar structures and voids inside the nanoclay aerogel structures were created by the sublimation of ice. Similar results were reported in many studies based on preparing polymer/clay aerogels with various types of polymers [42,[51][52][53][54][55][56][57][58]. e denser lamellar morphology was observed with the increase of the nanoclay loadings due to the limitation of the expanded space between the adjacent lamellar at a high nanoclay content.…”

Section: Part 1: Preparation Of the Nanoclay Aerogel Masterbatchsupporting

confidence: 75%

“…It was evident that all of the nanoclay aerogel masterbatches exhibited a typical lamellar morphology, which is also known as the house of cards structure that was created from the ice crystal growth via a freezedrying process [51,52]. e lamellar structures and voids inside the nanoclay aerogel structures were created by the sublimation of ice.…”

Section: Part 1: Preparation Of the Nanoclay Aerogel Masterbatchmentioning

confidence: 99%

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A Novel and Facile Nanoclay Aerogel Masterbatch toward Exfoliated Polymer‐Clay Nanocomposites through a Melt‐Mixing Process

Luecha

Magaraphan

2018

Advances in Materials Science and Engineering

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is research employed a novel and facile approach called nanoclay aerogel masterbatch.. is innovative technique was conducted by attaching the clay layers directly onto a mobile polymer, for example, polyethylene glycol (PEG), in order to modify the clay layer through PEG-clay intercalation and PEG-hydrogen bonding. is state was maintained with a small amount of the anionic polymer hydrogel, for example, kappa-carrageenan (KC), and turning it into a highly porous and fragile structure by freeze-drying, thus a so-called nanoclay aerogel masterbatch. e facile nanoclay aerogel masterbatch was able to be attained even at high clay loadings (55-67 wt.% of the inorganic clay content) with constant PEG and KC loadings. e interlayer spacing enlargement of the nanoclay galleries was around 17Å with the typical lamellar morphology like a house of cards structure. e density values were within 0.108-0.122 g·cm −3 . e thermal stabilities were up to 270°C, revealing better thermal stability for melt mixing with the commodity plastics at a high melting temperature. e flowability and processability were certified by the melt flow index (MFI) results. e highest nanoclay loading capacity (67 wt.%) of the achieved nanoclay aerogel masterbatch was selected to prepare PS-clay nanocomposites via a melt-mixing process. e comparative nanocomposites were produced by using organoclay. e results of the X-ray diffraction (XRD) and transmission electron microscopy (TEM) exhibited that the exfoliated morphologies were obtained at all clay contents (1-3 wt.%); however, the intercalated structure was gained by using organoclay.e outstanding transparency and brightness were remarked from the specimens prepared by using the nanoclay aerogel masterbatch. e brownish specimens were observed by using organoclay. e significant improvements of tensile properties, glass transition temperature (T g ), and thermal stability were noticed from the nanocomposites prepared using the nanoclay aerogel masterbatch.

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Section: Part 1: Preparation Of the Nanoclay Aerogel Masterbatchsupporting

confidence: 75%

Section: Part 1: Preparation Of the Nanoclay Aerogel Masterbatchmentioning

confidence: 99%

A Novel and Facile Nanoclay Aerogel Masterbatch toward Exfoliated Polymer‐Clay Nanocomposites through a Melt‐Mixing Process

Luecha

Magaraphan

2018

Advances in Materials Science and Engineering

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“…Although carbon aerogels show a large BET surface area (400-900 m 2 /g) and high porosity (>80%) [8], they are extremely expensive to dry out. Freeze-drying, however, can prevent shrinkage of the porous structure and a carbon precursor with a high porosity is obtained [9]. The obtained gel is termed a cryogel [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of nickel-modified carbon cryogel beads with uniform particle size

Chaichanawong

Yamamoto

Kim

et al. 2009

Journal of Non-Crystalline Solids

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“…After high vacuum sublimation, air is trapped in the place of ice crystals, forming a lightweight material with lamellar structure [10,12,14,16]. The formed clay aerogel is a material with low density, low thermal conductivity and low mechanical strength, which can be improved by the use of a reinforcement agent [17][18][19][20][21].…”

Section: Lamellar Structure Insulation Materialsmentioning

confidence: 99%

Synthesis and characterization of innovative insulation materials

et al. 2018

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Abstract. Insulation elements are distinguished in inorganic fibrous and organic foamed materials. Foamed insulation materials are of great acceptance and use, but their major disadvantage is their flammability. In case of fire, they tend to transmit the flame producing toxic gases. In this paper, the synthesis and characterization of innovative inorganic insulation materials with properties competitive to commercial is presented. Their synthesis involves the mixing of inorganic raw material and water with reinforcing agent or/and foaming agent leading to the formation of a gel. Depending on raw materials nature, the insulation material is produced by freeze drying or ambient drying techniques of the gel. The raw material used are chemically benign and abundantly available materials, or industrial by-products and the final products are non-toxic and, in some cases, non-flammable. Their density and thermal conductivity was measured and found 0.02-0.06 g/cm 3 and 0.03-0.04 W/mK, respectively.

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Facile processing of clays into organically‐modified aerogels

Cited by 69 publications

References 28 publications

A Novel and Facile Nanoclay Aerogel Masterbatch toward Exfoliated Polymer‐Clay Nanocomposites through a Melt‐Mixing Process

A Novel and Facile Nanoclay Aerogel Masterbatch toward Exfoliated Polymer‐Clay Nanocomposites through a Melt‐Mixing Process

Preparation and characterization of nickel-modified carbon cryogel beads with uniform particle size

Synthesis and characterization of innovative insulation materials

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