The Self-Assembling Properties of Stearate Ions in Hydrotalcite Clay Composites

Itoh, Toshio; Ohta, Nobuhiro; Shichi, Tetsuya; Yui, Tatsuto; Takagi, Katsuhiko

doi:10.1021/la0302448

Cited by 71 publications

(71 citation statements)

References 25 publications

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“…1. Chemical structures of these clays have also been published by Itoh et al 2 ,a n dG r e e n w e l let al 3 , respectively. The layer surface has 0.25 to 1.2 negative charges per unit cell and a commensurate number of exchangeable cations in the interlamellar galleries.…”

Section: Introductionmentioning

confidence: 84%

“…30 b The high temperature melt process, starts with fine powders of suitable salts (e.g. Li 2 O, MgO, SiO 2 and MgF 2 ), mixed in proper proportions, heated at 13008C for 3 hr and then allowed to cool for 10 hr. The reaction mass is dispersed in water and the solid contaminants sedimented, yielding synthetic HT stacks of ca.…”

Section: Synthetic Clays-methods Of Preparationmentioning

confidence: 99%

“…For example, composition of swellable FM may be: talc/LiF/Na 2 SiF 6 ¼ 80 : 10 : 10; or talc/Na 2 SiF 6 /Al 2 O 3 ¼ 70:20:10, i.e. NaMg 2.5 Si 4 O 10 (F a OH 1-a ) 2 with 0.8 a 1.0. Replacing Na by K makes the product non-swellable.…”

Section: Synthetic Clays-methods Of Preparationmentioning

confidence: 99%

“…similar in structure to MMT, with the chemical composition of Na 0.33 (Mg 2. 67 Li 0.33 )Si 4 O 10 (OH) 2 . These low aspect ratio materials are characterized by high brightness (transparency in products), and low level of impurities.…”

Section: Synthetic Clays-methods Of Preparationmentioning

confidence: 99%

“…Another method involves sol-gel hydrothermal transformation of TEOS or organo-tri-alkoxy silane, namely phenyltri-ethoxy silane (PTES). 17 Aqueous slurries of LiF, Mg(OH) 2 , and the silane are refluxed for 2-5 days. The organic content in the resulting PTES-HT was ca.…”

Section: Synthetic Clays-methods Of Preparationmentioning

confidence: 99%

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Synthetic, layered nanoparticles for polymeric nanocomposites (PNCs)

Utracki

Sepehr

Boccaleri

2007

Polymers for Advanced Techs

379

252

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Synthetic, layered nano-particles for polymeric nanocomposites (PNC's)Utracki, L. A.; Sepehr, M.; Boccaleri, E.Contact us / Contactez nous: nparc.cisti@nrc-cnrc.gc.ca.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=fr L'accès à ce site Web et l'utilisation de son contenu sont assujettis aux conditions présentées dans le site Web page / page Web http://dx.doi.org/10.1002/pat.852 http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=15774991&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=15774991&lang=fr LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D'UTILISER CE SITE WEB. READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en This review discusses preparation and use of the synthetic layered nanoparticles in polymer matrices, i.e., in the polymeric nanocomposites (PNCs). Several types of synthetic or semi-synthetic layered materials are considered, namely the phyllosilicates (clays), silicic acid (magadiite), layered double hydroxides (LDHs), zirconium phosphates (ZrPs), and di-chalcogenides. The main advantage of synthetic clays is their chemical purity (e.g. absence of amorphous and gritty contaminants, as well as arsenic, iron, and other heavy metals), white to transparent color that assures reproducibly of brightly colored products, as well as a wide range of aspect ratios, p ¼ 20 to £6000. Several large scale production facilities have been established. The synthetic clay and LDH industries are oriented toward big volume markets: catalysis, foodstuff, cosmetics, pharmaceuticals, toiletry, etc. The use of these materials in PNCs is limited to synthetic clays and LDHs, mainly for reinforcement, permeability control, reduction of flammability, and stabilization, e.g. during dehydrohalogenation of chlorinated macromolecules. The use of lamellar ZrPs and di-chalcogenides is at the laboratory stage of functional polymeric systems development, e.g. for electrically conductive materials, catalysts or support for catalysts, in photochemistry, molecular and chiral recognition, or in fuel cell technologies, etc. Copyright # 2007 John Wiley & Sons, Ltd.KEYWORDS: polymeric nanocomposites; nanoparticles; clay; layered double hydroxides; matrix POLYMERS FOR ADVANCED TECHNOLOGIES Polym. Adv. Technol. 2007; 18: 1-37 Published online in Wiley InterScience (www.interscience.wiley.com) DOI: 10.1002/pat.852 AUTHORS' BIOGRAPHIESDr Leszek A. Utracki was born and educated (up to Habilitation) in Poland. After the post-doctoral stage at USC in Los Angeles with Robert Simha he settled in Canada. His passionate research interest has been within the field of thermodynamics, rheology and processing of multicomponent, multiphase polymeric systems. During the 55 years in the profession he has published several hundred articles, book chapters, books, patents, etc., which has placed him on the ISI li...

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Section: Introductionmentioning

confidence: 84%

Section: Synthetic Clays-methods Of Preparationmentioning

confidence: 99%

Section: Synthetic Clays-methods Of Preparationmentioning

confidence: 99%

Section: Synthetic Clays-methods Of Preparationmentioning

confidence: 99%

Section: Synthetic Clays-methods Of Preparationmentioning

confidence: 99%

See 3 more Smart Citations

Synthetic, layered nanoparticles for polymeric nanocomposites (PNCs)

Utracki

Sepehr

Boccaleri

2007

Polymers for Advanced Techs

379

252

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The influence of filler surface modification on mechanical and material properties of layered double hydroxide‐containing polypropylene composites

Moyo

Ray

Sebati

et al. 2017

J of Applied Polymer Sci

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The processing and properties of layered double hydroxides (LDHs)‐containing polypropylene (PP) composites have been studied extensively. However, no detailed studies have reported on how stearic acid (SA)‐intercalated and SA‐coated LDHs influence the properties of melt‐processed PP/LDH composites. Here, four different types of LDHs: synthesized (cLDH1) and commercial (cLDH2) SA‐coated LDH, SA‐intercalated LDH (iLDH), and unmodified LDH (nLDH), were used to fabricate composites using a master‐batch‐dilution technique in a twin‐screw extruder. The characterization results showed that microcomposites were formed when cLDH2 and nLDH were used, whereas nanocomposites were formed when iLDH and cLDH1 were used. Strong nucleating behavior was observed for the nLDH‐, cLDH1‐, and cLDH2‐containing composites, whereas iLDH delayed the crystallization process of the PP matrix. A significant improvement in modulus, with a balance of tensile and impact strengths, was observed in the case of the cLDH1‐containing composite, whereas the nLDH‐containing composite showed good improvement in temperature‐dependent load‐bearing capacity. On the other hand, the PP/iLDH composite showed a remarkable improvement in thermal stability and a reduction in the peak‐heat‐release rate. Therefore, this study gives us an opportunity to design PP composites with desired properties by the judicious choice of LDH, which further widens the application of PP matrices. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45024.

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Oxidation of Dodecanoate Intercalated Iron(II)–Iron(III) Layered Double Hydroxide to Form 2D Iron(III) (Hydr)oxide Layers

et al. 2013

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A planar trioctahedral iron(II)-iron(III) hydroxide (green rust, GR) intercalated with dodecanoate (GR C12 ) has been oxidized by dioxygen to produce the corresponding planar iron(III) (hydr)oxide. The formulae of GR C12 and the final iron(III) product (oxGR C12 ) were determined to be Fe II 2.00 Fe III 1.00 (OH) 5.31 (C 12 H 23 O 2 ) 0.66 (SO 4 ) 0.51 and Fe III 3 O 2.18 -(OH) 3.13 (C 12 H 23 O 2 ) 0.56 (SO 4 ) 0.47 , respectively. oxGR C12 has the same planar layer structure as GR C12 , as revealed by identical powder X-ray diffraction patterns. The electrostatic interactions between the interlayer dodecanoate (C12) anions and the iron hydroxide planar layer were preserved during the oxidation, as shown by FTIR spectroscopy. The high positive charge in the hydroxide layer produced by the oxidation of iron(II) to iron(III) is partially compensated by the deprotonation of hydroxy groups, as shown by X-ray [a]

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The Self-Assembling Properties of Stearate Ions in Hydrotalcite Clay Composites

Cited by 71 publications

References 25 publications

Synthetic, layered nanoparticles for polymeric nanocomposites (PNCs)

Synthetic, layered nanoparticles for polymeric nanocomposites (PNCs)

The influence of filler surface modification on mechanical and material properties of layered double hydroxide‐containing polypropylene composites

Oxidation of Dodecanoate Intercalated Iron(II)–Iron(III) Layered Double Hydroxide to Form 2D Iron(III) (Hydr)oxide Layers

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