Nanohybrids of phenolic antioxidant intercalated into MgAl-layered double hydroxide clay

Lonkar, Sunil P.; Kutlu, Burak; Leuteritz, Andreas; Heinrich, Gert

doi:10.1016/j.clay.2012.10.009

Cited by 41 publications

(37 citation statements)

References 31 publications

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“…Hence peak shiftedslightly towards lower diffraction angle (Chakraborty et al, 2014). This also indicatesthe expansion in the interlayer distance and these planes also show the characteristic peaks of Mg/Al based LDH (Lonkar et al, 2013;Zazoua et al,2014).The XRD patterns (Fig. 1d)of the as-prepared LDH@GO hybrid NSshowamorphous nature,but nocharacteristic peak of GO was observedin hybrid layered NS ofLDH@GO.The peaksat34.0 0 and 60.0 0 , at (012) and (110) intensitiescorrespond to LDH.…”

Section: Structural and Crystallinity Analysismentioning

confidence: 95%

“…The bands at 1216 and 1063 cm −1 are ascribed to the symmetric vibration of sulfate from SDS, respectively (Chakraborty et al, 2014;Jain et al, 2016).The other low frequency regions(800 cm -1 ) are attributed to metal-oxygen and metal-hydroxyl vibration modes present in the lattice of LDH. .The broad band in the range of 3200-3700 cm −1 may be due to presence of O-H stretching vibration of hydrogen bonded metal hydroxide layer and interlayer water molecules (Lonkar et al, 2013;Chakraborty et al, 2014;Zazoua et al,2014). The band observed near 1637 cm -1 is assigned to the bending vibration of water molecules.…”

Section: Functional Groupanalysismentioning

confidence: 99%

“…But recently in the field of inorganic NM, layered double hydroxide (LDH) has emerged as the most powerful NMfor the preparation of multifunctional hybrids for various applications (Yuan et al, 2012). The LDH, a family member of inorganic layered NM, have recently attracted considerable attention because of their wide applications (Olfs et al, 2009;Ladewig et al, 2010;Chakraborty et al, 2012;Yuan et al, 2012;Lonkar et al, 2013;Menezes et al, 2014;Zazoua et al, 2014 (Sun et al,2015). The LDH have a high anion exchange capacity and large surface area due to their structural configuration (Olfs et al, 2009;Basu et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Preparation and analysis of multi-layered hybrid nanostructures

Khobragade

Hansora

Naik

et al. 2016

Applied Clay Science

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Section: Structural and Crystallinity Analysismentioning

confidence: 95%

Section: Functional Groupanalysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preparation and analysis of multi-layered hybrid nanostructures

Khobragade

Hansora

Naik

et al. 2016

Applied Clay Science

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“…Similarly, trans-cinnamic derivatives (ferulic acid, cafeic acid, hydroxycinnamic acid), known as AOs and UV blockers, have been successfully entrapped between LDH layers for cosmetic use as UV sunscreens and UV stabilizers [28]. Recently, 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid, containing the 2,6-di-tert-butylphenol functional group that is one of the most used AO in industry, has been intercalated within LDH galleries through co-precipitation [29] and regeneration method [30,31]. The modified LDH has been dispersed in polypropylene (PP) [29,30].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…The radical scavenging activity of AO species and AO-LDHs was determined according to the DPPH method [34,24,29,31]. A 25 mL methanol stock solution of DPPH (60 µM M and 4 x 10 -6 M) were prepared by diluting the appropriate aliquots of the stock.…”

Section: Assessment Of the Antioxidant Activity Of Ao-ldhsmentioning

confidence: 99%

Thermo-oxidative stabilization of poly(lactic acid) with antioxidant intercalated layered double hydroxides

Amaro

Cicogna

Passaglia

et al. 2016

Polymer Degradation and Stability

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Two antioxidant modified layered double hydroxides (AO-LDHs) were successfully prepared by the intercalation of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid (IrganoxCOOH) and 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid (Trolox) in the layered structure of LDH. It was found that by anchoring the phenolic moieties to the LDH layers the antioxidant power is retained in the case of Trolox, and even amplified in the case of IrganoxCOOH. A small amount of the two AO-LDHs was incorporated into poly(lactic acid), PLA, by solution mixing and melt extrusion. The thermo-oxidative stability of the composites was compared with that of the neat PLA and PLA containing free AOs. SEC analysis indicates that, after a controlled period of ageing, both the AO-LDHs protect the PLA from chain scission. The oxidation induction time (OIT, DSC) at 230 °C shows also the beneficial effects of the presence of the functional filler in the polymer matrix. Further, results from a preliminary migration test suggest that the AO species have a low tendency to migrate away from the AO-LDHs embedded in the polymer matrix thus keeping the AO protected inside the nanofiller layers thereby remaining active for a longer time.

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A green route to synthesize layered double hydroxides

Zhang

Wang

Liu

et al. 2014

Env Prog and Sustain Energy

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This article demonstrates a green route for synthesis of Ca‐doped [Mg3Al(OH)8]Cl from a reaction of AlCl3·6H2O, Mg(OH)2, Ca(OH)2, and NH3·H2O in water, which produces only the desired solid product and a by‐product NH4Cl in the mother solution; therefore, they can be separated easily by filtration or centrifugation. Being carefully designed, enough NH4Cl can be crystallized from the mother solution, which could be used as a fertilizer; while the distilled water be used to wash the products for the last time; the mother solution that still contains some NH4Cl and filtrate from the first time washing of the product can be used to prepare the LDH again. By using cheaper Mg(OH)2 and Ca(OH)2 instead of MgCl2·6H2O and CaCl2·2H2O, the process is more economic and produces less NH4Cl. © 2014 American Institute of Chemical Engineers Environ Prog, 34: 234–239, 2015

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Nanohybrids of phenolic antioxidant intercalated into MgAl-layered double hydroxide clay

Cited by 41 publications

References 31 publications

Preparation and analysis of multi-layered hybrid nanostructures

Preparation and analysis of multi-layered hybrid nanostructures

Thermo-oxidative stabilization of poly(lactic acid) with antioxidant intercalated layered double hydroxides

A green route to synthesize layered double hydroxides

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