Organophilic nature of nanoclay

Dana, Kausik; Sarkar, Madhuchhanda

doi:10.1016/b978-0-12-816783-0.00005-0

Cited by 8 publications

(5 citation statements)

References 55 publications

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“…MMT, with its high aspect ratio, surface area, high cation-exchange capacities, and excellent mechanical properties, can swell up to several times its original size when exposed to water [48,81]. Al 3+ and Mg 2+ are isomorphic replacements of Si 4+ in the tetrahedral sheet and Al 3+ in the octahedral sheet, respectively, to form the chemical compound known as MMT [59,82]. Halloysite, similar to kaolinite in chemical composition, differs from kaolinite due to its unique structure consisting of a single water molecule layer with chemical composition Al 2 Si 2 O 5 (OH) 4 .nH 2 O) [79].…”

Section: Tablementioning

confidence: 99%

Nanoclays as fillers for performance enhancement in building and construction industries: State of the art and future trends

Bantie,

Tezera,

Abera

et al. 2024

Developments in Clay Science and Construction Techniques

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In construction engineering, there is currently a strong emphasis on finding construction materials, mainly the binder which plays a crucial role, that meet multiple criteria, including sustainability, cost-effectiveness, durability, and reduced environmental impact. However, there is a growing interest in exploring alternatives to traditional binders to address the limitations associated with their production and use. One such alternative is the use of naturally occurring materials like clay. Clay deposits are abundant and widely available, making them a sustainable resource for construction applications. Moreover, clay contains significant amounts of silica and alumina, which are key components for inducing pozzolanic reactions that contribute to the strength and durability of concrete. In recent studies, nanoclays (NCs) have emerged as a promising addition to construction materials as supplementary cementitious materials. These nanoparticles possess unique properties that can enhance the performance of concrete. Nanoclays significantly improve the compressive strength, sustainability, and durability of concrete structures. The high surface area and reactivity of nanoclays facilitate better bonding between cement particles, resulting in enhanced mechanical properties. This chapter aims to discuss the state of the art on performance enhancements of building materials that employ different types of nanoclays in place of conventional binders and the future trends.

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Section: Tablementioning

confidence: 99%

Nanoclays as fillers for performance enhancement in building and construction industries: State of the art and future trends

Bantie,

Tezera,

Abera

et al. 2024

Developments in Clay Science and Construction Techniques

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“…The process of adding clay to the unsaturated FA and heating results in the FA penetrating the intersheet domains of the smectite particles [ 31 , 32 ] and being near the numerous acidic cations in a confined environment supporting reactions of the FA olefinic portion [ 8 , 31 , 33 ]. Layered clays allow the reaction products (dimer and polymers) to escape from the reaction site, which may not be true for zeolites, and be replaced by fresh unsaturated fatty acids.…”

Section: Fatty Acid Dimer Synthesis and Propertiesmentioning

confidence: 99%

Chemistry of Dimer Acid Production from Fatty Acids and the Structure–Property Relationships of Polyamides Made from These Dimer Acids

Frihart

2023

Polymers

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While there is abundant literature on using a wide range of biomaterials to make polymers for various adhesive applications, most researchers have generally overlooked developing new adhesives from commercially available bio-based dimerized fatty acids. Some of the literature on the chemistry taking place during the clay-catalyzed dimerization of unsaturated fatty acids is generally misleading in that the mechanisms are not consistent with the structures of these dimers and a by-product isostearic acid. A selective acid-catalyzed interlayer model is much more logical than the widely accepted model of clay-catalyzed Diels–Alder reactions. The resulting dimers have a variety of linkages limiting large crystal formation either as oligomeric amides or polyamides. These highly aliphatic fatty acid dimers are used to make a wide range of hot melt polyamide adhesives. The specific structures and amounts of the diacids and diamines and their relative ratios have a big effect on the bio-based polyamide mechanical properties, but analysis of the structure–property relationships has seldom been attempted, since the data are mainly in the patent literature. The diacids derived from plant oils are valuable for making polyamides because of their very high bio-based content and highly tunable properties.

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“…Organic and aromatic micropollutants can be removed with adsorbents based on natural clay minerals. Natural clays are hydrophilic and could be ineffective for selecting hydrophobic pharmaceuticals from industrial wastewater [79,80]. Pharmaceuticals or antibiotics are efficiently removed from aqueous solutions using vermiculite.…”

Section: Nanoclays and Their Role As Environmental Adsorbentsmentioning

confidence: 99%

Physical-Chemical Properties of Nano-Sized Phyllosilicates: Recent Environmental and Industrial Advancements

Elmi

2023

Encyclopedia

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Phyllosilicates are common minerals that include the most widely known micas and clay minerals. These minerals are found in several natural environments and have unique physical-chemical features, such as cation exchange capacity (CEC) and surface charge properties. When phyllosilicates are nano-sized, their physical-chemical properties are enhanced from those of the micro-sized counterpart. Because of their unique crystal chemical and physical-chemical features, kinetics, and particle size, nano-sized clay minerals (i.e., kaolinite, montmorillonite/illite) and micas (i.e., muscovite) are of great interest in several fields spanning from environmental applications to engineered materials. This paper aims to overview the recent developments of environmental protection and technological applications employing nano-sized natural micas and clay minerals. Emphasis is given to the role that the unique physical-chemical properties of montmorillonite, vermiculite, kaolinite, and muscovite play in nanoparticle formulations, manufacture, and technical performance.

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Organophilic nature of nanoclay

Cited by 8 publications

References 55 publications

Nanoclays as fillers for performance enhancement in building and construction industries: State of the art and future trends

Nanoclays as fillers for performance enhancement in building and construction industries: State of the art and future trends

Chemistry of Dimer Acid Production from Fatty Acids and the Structure–Property Relationships of Polyamides Made from These Dimer Acids

Physical-Chemical Properties of Nano-Sized Phyllosilicates: Recent Environmental and Industrial Advancements

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