Characterization of exfoliated layered double hydroxide (LDH, Mg/Al = 3) nanosheets at high concentrations in formamide

Wu, Qixin; Sjåstad, Anja Olafsen; Vistad, Ørnulv B.; Knudsen, Kenneth D.; Roots, Jaan; Pedersen, Jan Skov; Norby, Poul

doi:10.1039/b612389a

Cited by 75 publications

(48 citation statements)

References 26 publications

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“…To give some examples, organic intercalated anions like acetate, formate, or lactate abet delamination in water [42]. Alternatively, in formamide it is possible to delaminate nitrate-based [43] or amino-acid intercalated [44]. A subsequent drying process permits to recover well-ordered LDHs and LDHpolymer complexes [42].…”

Section: Delamination/restacking Methodsmentioning

confidence: 99%

Characteristics, Preparation Routes and Metallurgical Applications of LDHs: An Overview

Richetta¹

2017

J Material Sci Eng

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The peculiar properties of layered Double Hydroxides (LDH) have progressively drawn the attention of the scientific community. The main characteristic of LDH is the ability to capture anionic species (organic and inorganic) to build different composites. This is made possible by the sandwich structure of the LDH, similar to the brucite architecture, made up of positive charged lamellas interspersed by anions. Several distant fields, ranging from medicine to physics and engineering, exhibit interest in LDH applications. To satisfy all those requirements, energy was spent to sculpt LDHs physical and chemical properties and for designing layered double hydroxides "ad hoc" for different needs and employments. Notably, among the many applications, those related to metallurgical processes and products are of particular interest. This paper presents the characteristics, the main preparation routes and reviews the applications of LDH to metallurgy with some examples taken from the experimental research of the author.

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Section: Delamination/restacking Methodsmentioning

confidence: 99%

Characteristics, Preparation Routes and Metallurgical Applications of LDHs: An Overview

Richetta¹

2017

J Material Sci Eng

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“…For instance, organic intercalated anions such as methoxide, acetate, for-mate and lactate favour delamination in water [37]. Alternatively, nitrate-based [38] or amino-acid intercalated [39] LDHs can be delaminated in form-amide. By drying, well-ordered LDHs and LDH-polymer Nano composites intercalating a number of organic compounds were obtained [37].…”

Section: The Delamination/restacking Methodsmentioning

confidence: 99%

Layered Double Hydroxides: Tailoring Interlamellar Nanospace for a Vast Field of Applications

Richetta¹,

Medaglia²,

Mattoccia³

et al. 2017

J Material Sci Eng

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Fifty-eight years ago Fenman, during an American Physical Society meeting at the California Institute of Technology, anticipated the problem of modifying and governing the world of the infinitely small. what is possible in principle… We are not doing it simply because we haven't yet gotten around to it." Useless to say how profound his sensibility for science was. We've just begun to walk in this enormous field, toward the assembly of devices atom by atom. What we did till now is still rudimentary. Anyhow we believe that Layered Double Hydroxides could play a role in manufacturing these nanometric equipments.Layered Double Hydroxides (LDHs) are 2D ionic lamellar nano-materials belonging to the group of anionic clays. Their structure consists of positively charged brucite-like layers and intercalated anions. The layered structure, together with the flexibility to intercept different anionic species in variable compositions, both inorganic and organic, has attracted increasing interest. In order to meet specific requirements in very distant fields, considerable efforts were made to tailor the physical/chemical properties of LDHs and to design engineered LDH for several applications, ranging from anticorrosion coatings, flame-retardants, catalysis, to water treatment/purification, and biomedical applications. Furthermore they have been applied in energy harvesting and conversion, thanks to the possibility of substituting the composing metals with transition metals.Within the framework of this contribution, we first briefly review the development of synthesis processes ( §1). In Paragraph 2, examples of the LDHs applications are reported. We will than focus on our laboratory experimental activities, showing the growth of the structures either on printed circuit tracks for applications of LDHs as gas sensors and biosensors. One more application is in nanostructured-modified textiles.

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“…During synthesis, LDHs may be preintercalated with organic anions. Unfortunately, most LDH platelets are thin, t = 0.6 ± 0.1 nm, small in diameter, d = 30 to 40 nm [Wu et al, 2007]), and decompose thermally at T ≈ 207 • C [Camino et al, 2001]); consequently, their main application has been for absorption of HCl during dehydrochlorination of poly(vinyl chloride) (PVC) and halogenated polymers, or as flame retardants. The flow behavior of polyethylene (PE) with LDHs was reported to be similar to that of CPNCs [Costa et al, 2006].…”

Section: Diversity Of Pncsmentioning

confidence: 99%

Rheology of Polymers with Nanofillers

2010

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Characterization of exfoliated layered double hydroxide (LDH, Mg/Al = 3) nanosheets at high concentrations in formamide

Cited by 75 publications

References 26 publications

Characteristics, Preparation Routes and Metallurgical Applications of LDHs: An Overview

Characteristics, Preparation Routes and Metallurgical Applications of LDHs: An Overview

Layered Double Hydroxides: Tailoring Interlamellar Nanospace for a Vast Field of Applications

Rheology of Polymers with Nanofillers

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