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Journal articles on the topic 'Na-montmorillonite'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

NA, P., F. ZHANG, and Y. LI. "Molecular Dynamics Simulation of Na-montmorillonite and Na/Mg-montmorillonite Hydrates." Acta Physico-Chimica Sinica 22, no. 9 (2006): 1137–42. http://dx.doi.org/10.1016/s1872-1508(06)60053-3.

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2

Guo, Li Ying, Shi Yang Bai, Jia Lei Liu, and Qi Peng Ma. "Intercalation of Na-Montmorillonite with Ionic Liquids." Advanced Materials Research 798-799 (September 2013): 211–14. http://dx.doi.org/10.4028/www.scientific.net/amr.798-799.211.

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Na-montmorillonite was modified by ionic liquids as the intercalation agent with different side chains. The influence of side chains in ionic liquid to Na-montmorillonite after intercalation was discussed. The chemical structures of ionic liquid/organic montmorillonite complexes were characterized. The results indicated that the ion-exchanging reaction can be happened in ionic liquids and montmorillonite, which the space increased between of organic modified montmorillonite, and the longer chain of ionic liquid, the greater distance of montmorillonte.

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3

Hasegawa, Naoki, Hirotaka Okamoto, Makoto Kato, Arimistu Usuki, and Norio Sato. "Nylon 6/Na–montmorillonite nanocomposites prepared by compounding Nylon 6 with Na–montmorillonite slurry." Polymer 44, no. 10 (2003): 2933–37. http://dx.doi.org/10.1016/s0032-3861(03)00215-5.

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4

Lagaly, G., and S. Ziesmer. "Surface modification of bentonites. V. Sol-gel transitions of Ca-montmorillonite in the presence of cationic end-capped poly(ethylene oxides)." Clay Minerals 42, no. 2 (2007): 255–69. http://dx.doi.org/10.1180/claymin.2007.042.2.10.

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AbstractThe colloidal state of aqueous Ca2+-montmorillonite dispersions was modified with three types of cationic end-capped poly(ethylene oxides). The macromolecules were not only adsorbed at the external surfaces but were also intercalated into the dispersed montmorillonite particles. The amounts adsorbed and the basal spacings (~1.7 nm) were comparable to the corresponding Na+-montmorillonite dispersions. The poly(ethylene oxides) protruding out of the interlayer spaces or adsorbed at the external surface determined the colloidal behaviour of the dispersions. The phase diagrams (sol-gel dia

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5

Yamamoto, Kenichiro, Takashi Shiono, Ryoto Yoshimura, Yasuto Matsui, and Minoru Yoneda. "Influence of hydrophilicity on adsorption of caffeine onto montmorillonite." Adsorption Science & Technology 36, no. 3-4 (2017): 967–81. http://dx.doi.org/10.1177/0263617417735480.

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Some types of montmorillonite containing different interlayer ions were prepared and the changes in the interlayer spacings, the hydrophilicity, and the characteristics of adsorption of caffeine in solution were observed. Ion exchange treatments were performed using Li, Na, K, Rb, Cs, Mg, Ca, Sr, or Ba. As a result, Li- and Na-type montmorillonite showed larger interlayer distance (1.31–1.53 nm), than K, Rb, and Cs-type montmorillonite (1.23–1.26 nm). In the measurement of hydrophilicity using a pulse NMR-based particle interface analyzer, Li- and Na-type montmorillonite showed higher hydrophi

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6

Wu, Zhenxiao, Hao Zhao, Xuanping Zhou, Yang Wang, Kesheng Zuo, and Hongfei Cheng. "Thermal Migration Behavior of Na+, Cu2+ and Li+ in Montmorillonite." Minerals 12, no. 4 (2022): 477. http://dx.doi.org/10.3390/min12040477.

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The main aim of this paper is to study the cation fixation sites in montmorillonite after heating at different temperatures. Montmorillonite was used to adsorb cations (Na+, Cu2+ and Li+) in the solution, and the montmorillonite-adsorbed cations were heated at different temperatures (unheated, 100 °C, 200 °C and 300 °C) for 25 h. Subsequently, the basal spacing of montmorillonite treated at different temperatures was monitored by X-ray diffraction (XRD). The exchangeable cationic content (Na+, Cu2+ and Li+) in montmorillonite was determined based on an inductively coupled plasma emission spect

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7

Kasperski, Kim L., Charles T. Hepler, and Loren G. Hepler. "Viscosities of dilute aqueous suspensions of montmorillonite and kaolinite clays." Canadian Journal of Chemistry 64, no. 9 (1986): 1919–24. http://dx.doi.org/10.1139/v86-316.

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We have measured viscosities and densities of dilute aqueous suspensions of Na-kaolinite (25 °C), of Na-montmorillonite (25–55 °C), and of mixtures of Na-kaolinite/Na-montmorillonite (25 °C). Results of the measurements at 25 °C have been analyzed in terms of the Einstein equation with conclusions that are consistent with previous knowledge that colloidal particles of these clays are non-spherical and that montmorillonite is a swelling clay. Viscosities of mixed clay systems are nearly consistent with a simple additivity model; the small non-additivities are in accord with previous evidence th

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8

Qiu, Jinghong, Shihua Dong, Haibo Wang, Xu Cheng, and Zongliang Du. "Adsorption performance of low-cost gelatin–montmorillonite nanocomposite for Cr(iii) ions." RSC Advances 5, no. 72 (2015): 58284–91. http://dx.doi.org/10.1039/c5ra08781c.

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9

Yamada, H., H. Nakazawa, K. Yoshioka, and T. Fujita. "Smectites in the montmorillonite-beidellite series." Clay Minerals 26, no. 3 (1991): 359–69. http://dx.doi.org/10.1180/claymin.1991.026.3.05.

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AbstractSmectites in the montmorillonite-beidellite pseudo-binary system were synthesized from glass at the hydrothermal conditions 100 MPa and 250–500°C. Products were analysed by X-ray powder diffraction for randomly oriented and glycolated samples, and also according to the Greene-Kelly test. A new mixed-layer mineral consisting of regularly interstratified montmorillonite-beidellite was found below 400°C for M50B50 composition, where M and B denote the compositions of ideal Na-montmorillonite and Na-beidellite, respectively. Montmorillonite was obtained as a single phase below 375°C in the

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10

Zhang, Ji Chu, Ze Peng Zhang, Bo Hu, and Gang Liu. "New Method of Preparation and Property Study of the Montmorillonite Modified with CTAB." Advanced Materials Research 284-286 (July 2011): 377–81. http://dx.doi.org/10.4028/www.scientific.net/amr.284-286.377.

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In this paper, Ca2+-montmorillonite (Ca2+-Mt) was modified with cationic surfactant hexadecyl trimethyl ammonium Bromide (CTAB) directly, without changing Ca2+-Mt into Na+-montmorillonite (Na+-Mt). X-ray diffraction (XRD), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), contact angle tests and rotary viscosity tests were used to characterize the structure and property of the organo-montmorillonite. The results of XRD show that interlayer space (d001) of the product is 4.05nm. The results of TGA indicate the ratio of weight loss of the organic components in th

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11

Ziesmer, S., and G. Lagaly. "Surface modification of bentonites. VI. Sol-gel transitions of sodium and calcium montmorillonite dispersions in the presence of anionic end-capped poly(ethylene oxides)." Clay Minerals 42, no. 4 (2007): 563–73. http://dx.doi.org/10.1180/claymin.2007.042.4.12.

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AbstractPoly(ethylene oxides) (PEOs) with sulphonate groups attached at both chain ends (S-PEOs) were strongly adsorbed by dispersed Na- and Ca-montmorillonite particles. The amounts adsorbed were very similar to those of cationic end-capped poly(ethylene oxides). In both cases bilayers of PEO chains were intercalated so that the basal spacing of the particles reached the same plateau values of ~1.73 nm. In contrast, the influence of anionic PEOs on the colloidal behaviour of the Na- and Ca-montmorillonite dispersions was very different from the effect of the cationic PEOs. The shorter chain S

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12

Berger, F., I. Dekany, K. Beneke, and G. Lagaly. "Selective liquid sorption and wetting of pillared montmorillonites." Clay Minerals 32, no. 3 (1997): 331–39. http://dx.doi.org/10.1180/claymin.1997.032.3.01.

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AbstractPillared montmorillonite was used as an adsorbent for binary mixtures of hydrocarbons and alcohols (benzene/n-heptane; ethanol/cyclohexane; ethanol/toluene; propanol/ toluene). The adsorbent was prepared from the Na-form of a bentonite from Milos by reaction with polyhydroxoaluminium solutions. The adsorption behaviour of the pillared montmorillonite was characterized by the adsorption excess isotherms and the heats of immersion. Sorption capacities and wetting properties differed significantly from those of the Na-montmorillonite. Benzene was adsorbed preferentially from mixtures with

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13

Han, Yang-Su, and In Park. "Intercalation of Cocamide Diethanolamine into Swellable Clay by Solid-State Process." Crystals 12, no. 9 (2022): 1253. http://dx.doi.org/10.3390/cryst12091253.

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Coconut fatty acid diethanolamine (cocamide-DEA (CDEA)), CH3(CH2)16CON(CH2CH2OH)2 was intercalated into montmorillonite using both solution and solid-state reaction methods. In a typical solution process, the CDEA aqueous solution was mixed with a montmorillonite (Kunipia-F) aqueous suspension, which resulted in a CDEA–montmorillonite layer complex with a basal spacing of 13.8 Å. A CDEA–montmorillonite complex was also easily prepared by the solid–solid reaction method. A mixture of CDEA and Na–montmorillonite was ground at ambient temperature. The basal spacing of the mixture increased to app

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14

Nagasaki, Shinya, Yuriko Nakagawa, and Satoru Tanaka. "Sorption of nonylphenol on Na-Montmorillonite." Colloids and Surfaces A: Physicochemical and Engineering Aspects 230, no. 1-3 (2003): 131–39. http://dx.doi.org/10.1016/j.colsurfa.2003.09.026.

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15

SATO, Haruo. "A Thermodynamic Analysis on the Effect of Salinity on Interlayer Space of Na-Montmorillonite." MRS Advances 1, no. 61 (2016): 4027–33. http://dx.doi.org/10.1557/adv.2017.185.

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ABSTRACTBentonite is used as one of the materials for engineered barrier systems in a radioactive waste repository. Since the major clay mineral constituent of bentonite is montmorillonite, its physico-chemical properties are important. Basal spacing of water-saturated Na-montmorillonite is reported to decrease with increasing Na-montmorillonite density. This paper presents a thermodynamic model to calculate change in the interlayer space of Na-montmorillonite based on the relative partial molar Gibbs free energy (dG) of interlayer water as contacted with a solution of an arbitrary salinity (N

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16

Olopade, Bunmi K., Obinna C. Nwinyi, Joseph A. Adekoya, et al. "Thermogravimetric Analysis of Modified Montmorillonite Clay for Mycotoxin Decontamination in Cereal Grains." Scientific World Journal 2020 (November 28, 2020): 1–5. http://dx.doi.org/10.1155/2020/6943514.

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Thermogravimetric analysis (TGA) was carried out to study the stability of nanoformulations used for the decontamination of mycotoxins. The TGA patterns of the nanoformulations from montmorillonite clay and Cymbopogon citratus (lemongrass) extracts were assessed with temperature ranging from ambient (20°C) to 1000°C. The various nanoformulations studied included unmodified montmorillonite clay (Mont), montmorillonite washed with sodium chloride (Mont-Na), montmorillonite mixed with lemongrass essential oil (Mont-LGEO), and montmorillonite mixed with an equal quantity of lemongrass powder (Mont

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17

Zhao, Jian, Yu Cao, Lei Wang, Hai-Jiang Zhang, and Man-Chao He. "Investigation on Atomic Structure and Mechanical Property of Na- and Mg-Montmorillonite under High Pressure by First-Principles Calculations." Minerals 11, no. 6 (2021): 613. http://dx.doi.org/10.3390/min11060613.

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Montmorillonite is an important layered phyllosilicate material with many useful physicochemical and mechanical properties, which is widely used in medicine, environmental protection, construction industry, and other fields. In order to a get better understanding of the behavior of montmorillonite under high pressure, we studied its atomic structure, electronic and mechanical properties using density functional theory (DFT), including dispersion corrections, as function of the interlayer Na and Mg cations. At ideal condition, the calculations of lattice constants, bond length, band structure,

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18

Patel, Madhuri A., Aishwarya Soumitra Kar, Sumit Kumar, Mrinal Kanti Das, Vaibhavi V. Raut, and Bhupendra S. Tomar. "Effect of sulfate on sorption of Eu(III) by Na-montmorillonite." Radiochimica Acta 107, no. 2 (2019): 115–28. http://dx.doi.org/10.1515/ract-2018-2964.

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Abstract Smectite-rich natural clay is being evaluated as the backfill and buffer material in the Indian repository program for the nuclear high level waste disposal. In the natural clay, montmorillonite is one of the major mineral component governing the sorption behavior of various radionuclides. In the present work, influence of sulfate anion on sorption of Eu(III) by Na-montmorillonite has been investigated. The effect of pH and sulfate concentration on Eu(III) sorption by Na-montmorillonite was used to understand the mechanism of sorption process. The Eu(III) sorption by clay at varying p

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19

Lv, Xiu Ling, and Shu Qing Zhang. "Studying on Improving Adsorption Capacity of Pillared-Montmorillonite by Na₆(PO₃)₆." Advanced Materials Research 753-755 (August 2013): 806–8. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.806.

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As the raw materials of preparing pillared-montmorillonite, before being pillared, Na-montmorillonite is pretreated by adding sodium hexametaphosphate (Na6(PO3)6) to soliquoid of it. Na6(PO3)6 is used as a dispersing agent. It is shown that adsorption capacity of pillared-montmorillonite on SO42-ion is increased compared with non-adding.

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20

Volzone, C., and L. B. Garrido. "Changes in suspension properties of structural modified montmorillonites." Cerâmica 47, no. 301 (2001): 4–8. http://dx.doi.org/10.1590/s0366-69132001000100002.

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Rheological changes were found in smectite (Wyoming- and Cheto-type montmorillonites) suspensions after structural modifications. The effect of the particle size and Na+ exchange on the flow curves of 6% wt/wt suspensions of smectites with and without Na2CO3 were examined. Mineralogical, structural and physicochemical characteristics were studied by X-ray diffraction (XRD), infrared spectroscopy (IR), cationic exchange capacity (CEC), Mg2+, Al3+ determinations, particle size distribution and swelling index (SI). Grinding in an oscillating mill modified the particle sizes. The montmorillonite g

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21

Beigbaghlou, Somayyeh Sarvi, Katayoun Marjani, Azizollah Habibi, and Seyyed Vahid Atghia. "Introduction of a new ionic liquid solid acid based on clay as an efficient, recyclable and thermally stable catalyst for organic transformations." RSC Advances 6, no. 24 (2016): 20306–16. http://dx.doi.org/10.1039/c5ra25297k.

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Ammonium hydrogen sulfate based ionic liquid immobilized on Na<sup>+</sup>–montmorillonite (AHS@MMT) was prepared via anchoring ammonium hydrogen sulfate propyltriethoxysilane onto sodium montmorillonite by covalent bonds.

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22

Wijaya, Karna, Iqmal Tahir, and Ahmad Baikuni. "THE SYNTHESIS OF Cr₂O₃-PILLARED MONTMORILLONITE (CrPM) AND ITS USAGE FOR HOST MATERIAL OF p-NITROANILINE." Indonesian Journal of Chemistry 2, no. 1 (2010): 12–21. http://dx.doi.org/10.22146/ijc.21928.

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The synthesis of Cr2O3-pillared montmorillonite (CrPM) and its usage for host material of p-nitroaniline have been conducted. The Cr2O3-pillared montmorillonite clays was prepared by a direct ion exchange method. First, the polyhydroxychromium as a pillaring spesies was intercalated into the interlayer region of the montmorillonite clays (purified clay in the monocation form), result in a montmorillonite-polyoxychromium intercalation compound. The precursors/pillaring spesies was not stable, hence it must be stabilized by calcination in order to transform the polyoxychromium via dehydration an

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23

Farias, Ana Paula S. F., Yasmin S. Tadayozzi, Cristine E. A. Carneiro, and Dimas A. M. Zaia. "Salinity and pH affect Na+-montmorillonite dissolution and amino acid adsorption: a prebiotic chemistry study." International Journal of Astrobiology 13, no. 3 (2014): 259–70. http://dx.doi.org/10.1017/s1473550414000044.

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AbstractThe adsorption of amino acids onto minerals in prebiotic seas may have played an important role for their protection against hydrolysis and formation of polymers. In this study, we show that the adsorption of the prebiotic amino acids, glycine (Gly), α-alanine (α-Ala) and β-alanine (β-Ala), onto Na+-montmorillonite was dependent on salinity and pH. Specifically, adsorption decreased from 58.3–88.8 to 0–48.9% when salinity was increased from 10 to 100–150% of modern seawater. This result suggests reduced amino acid adsorption onto minerals in prebiotic seas, which may have been even mor

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24

Bouchareb, Badra, Nacerddine Haddaoui, and Sarwat Zahra. "Effect of montmorillonite addition (modified and unmodified) on the structural, mechanical, thermal, and morphological properties of nanocomposites based poly (vinyl chloride)." Matériaux & Techniques 110, no. 1 (2022): 103. http://dx.doi.org/10.1051/mattech/2022011.

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Poly (vinyl chloride)/ montmorillonite nanocomposites were prepared using a melt mixing technique. For this purpose, three montmorillonite samples (MMT) namely, raw montmorillonite (R-MMT), sodium montmorillonite (Na+-MMT) and organically modified montmorillonite (O-MMT) were used with different contents (0, 1, 3, 5, 7 and 9 phr) in the presence of dioctyl phthalate (DOP). X-Ray Diffraction (XRD), Atomic Force Microscopy (AFM), Differential Scanning Calorimetry (DSC), and mechanical testing were used to investigate the physical properties of nanocomposites (PVC/MMT). The results of XRD show th

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25

Lai, Shui Li, and Ying Hua Gao. "Preparation, Characterization of Organo-Montmorillonite under Focused Signal-Mode Microwave Irradiation." Applied Mechanics and Materials 198-199 (September 2012): 85–88. http://dx.doi.org/10.4028/www.scientific.net/amm.198-199.85.

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In this paper，the organo-montmorillonite (OMMT) was prepared by cation exchange reaction, using sodium montmorillonite (Na+-MMT) and cetyltrimethylammonium bromide(CTAB) as all intercalation agent under precision microwave organic synthesis system. The structure of the montmorillonite was characterized by X-ray diffraction (XRD)、infrared spectrum (IR)、thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The results show that the intercalation is successful, the CTAB as a organic modifier introuduced into lattice layers of montmorillonite by cation-exchange reaction and the

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26

Feng, Hui Xia, Gong Wei Fu, Yi Wang, Na Li Chen, and Rui Chen Yang. "Preparation and Characterization of Polyacrylonitrile-Metal-O-MMT Nanocomposites." Advanced Materials Research 221 (March 2011): 316–20. http://dx.doi.org/10.4028/www.scientific.net/amr.221.316.

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Polyacrylonitrile-metal-O-montmorillonite nanocomposites were prepared by means of in situ polymerization. The Na-montmorillonite was modified by quaternary ammonium salt after the exchange of its interlayer cations with Ni2+. Infrared spectra and X-ray powder diffraction were employed to characterize the obtained polyacrylonitrile-metal-O-montmorillonite. The results of FTIR show that metal-O-montmorillonite has been concerned with the polymerization of PAN. The result of X-ray powder diffraction shows that the inserting of the acrylonitrile monomer can enlarge the interlayer space of montmor

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27

Li, Na, Hai Biao Liu, and Jun Li Huang. "Advanced Treatment Effect of Compound Montmorillonite Adsorb-Coagulant on Coking Wastewater." Advanced Materials Research 171-172 (December 2010): 504–7. http://dx.doi.org/10.4028/www.scientific.net/amr.171-172.504.

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The conventional biological treatment technology is inefficiently for coking wastewater. It is meaningful to study the advanced treatment process for these kinds of wastewater. A new compound montmorillonite adsorb-coagulant was prepared by complex formulation of microwave organic modified montmorillonite, Na- montmorillonite and polyaluminium chloride (PAC). And it was used in the advanced treatment of coking wastewater after biological treatment. Experimental results show that the mass ratio of microwave organic modified montmorillonite, Na-montmorillonite and polyaluminium chloride (PAC) is

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28

Olopade, Bunmi K., Solomon U. Oranusi, Obinna C. Nwinyi, Isiaka A. Lawal, Sefater Gbashi, and Patrick B. Njobeh. "Decontamination of T-2 Toxin in Maize by Modified Montmorillonite Clay." Toxins 11, no. 11 (2019): 616. http://dx.doi.org/10.3390/toxins11110616.

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Montmorillonite clay has a wide range of applications, one of which includes the binding of mycotoxins in foods and feeds through adsorption. T-2 toxin, produced by some Fusarium, Myrothecium, and Stachybotrys species, causes dystrophy in the brain, heart, and kidney. Various formulations that include lemongrass essential oil-modified montmorillonite clay (LGEO-MMT), lemongrass powder (LGP), montmorillonite clay washed with 1 mM NaCl (Na-MMT), montmorillonite clay (MMT), and lemongrass powder mixed with montmorillonite clay (LGP-MMT) were applied to maize at concentrations of 8% and 12% and st

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29

Xue, Yijiao, Mingxia Shen, Fengling Lu, et al. "Effects of heterionic montmorillonites on flame resistances of polystyrene nanocomposites and the flame retardant mechanism." Journal of Composite Materials 52, no. 10 (2017): 1295–303. http://dx.doi.org/10.1177/0021998317724861.

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To improve the flame resistance of polystyrene, three kinds of organophilic heterionic montmorillonites (Na-montmorillonite, Ca-montmorillonite, and Fe-montmorillonite) reinforced polystyrene nanocomposites were prepared by melt dispersion method. The structure and composition of the organo montmorillonites were characterized by using X-ray diffraction and Fourier-transform infrared analysis. The adhesion between organo montmorillonites and polystyrene was investigated by scanning electron microscopy. The flame resistance and thermal stability of the polystyrene/organo montmorillonites were ev

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Rakhimova, N. A., and S. V. Kudashev. "Organophilization of Na+-montmorillonite with polyfluorinated alcohols." Russian Journal of Applied Chemistry 83, no. 11 (2010): 2035–40. http://dx.doi.org/10.1134/s1070427210110273.

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31

Çelik, Meltem, and Müşerref Önal. "Polythiophene/Na-montmorillonite composites via intercalative polymerization." Journal of Thermoplastic Composite Materials 27, no. 2 (2012): 145–59. http://dx.doi.org/10.1177/0892705712452741.

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Kim, Bo-Hyun, Jae-Hoon Jung, Seung-Hoon Hong, et al. "Nanocomposite of Polyaniline and Na+−Montmorillonite Clay." Macromolecules 35, no. 4 (2002): 1419–23. http://dx.doi.org/10.1021/ma010497c.

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33

Shaikh, Alaeddin, James F. Ruff, and Steven R. Abt. "Erosion Rate of Compacted NA‐Montmorillonite Soils." Journal of Geotechnical Engineering 114, no. 3 (1988): 296–305. http://dx.doi.org/10.1061/(asce)0733-9410(1988)114:3(296).

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34

Nakaishi, Katsuya. "Flow characteristic of dilute Na montmorillonite suspension." Applied Clay Science 12, no. 4 (1997): 377–86. http://dx.doi.org/10.1016/s0169-1317(97)00020-3.

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35

Zheng, Y., and A. Zaoui. "Mechanical behavior in hydrated Na-montmorillonite clay." Physica A: Statistical Mechanics and its Applications 505 (September 2018): 582–90. http://dx.doi.org/10.1016/j.physa.2018.03.093.

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36

Liu, Yu-Chuan, and Ming-Der Ger. "Modification of electropolymerized polypyrrole with Na+-montmorillonite." Chemical Physics Letters 362, no. 5-6 (2002): 491–96. http://dx.doi.org/10.1016/s0009-2614(02)01108-9.

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37

Butman, M. F., N. L. Ovchinnikov, B. Nuralyev, N. S. Karasev, and A. G. Belozerov. "Electrolytic properties of Na+-doped pillared montmorillonite." Nanotechnologies in Russia 10, no. 11-12 (2015): 872–77. http://dx.doi.org/10.1134/s1995078015060026.

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38

Cosultchi, A., I. Cordova, M. A. Valenzuela, D. R. Acosta, P. Bosch, and V. H. Lara. "Adsorption of Crude Oil on Na+-Montmorillonite†." Energy & Fuels 19, no. 4 (2005): 1417–24. http://dx.doi.org/10.1021/ef049825a.

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39

Yao, Peng Quan, Lin Hua Zhu, Tian Si, and Jin Yang. "Intercalation of Gold Nanoparticles into Na-Montmorillonite." Advanced Materials Research 716 (July 2013): 360–63. http://dx.doi.org/10.4028/www.scientific.net/amr.716.360.

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Several type of gold precursors including pre-synthesized Au (en)2Cl3and gold colloid were tried to intercalate into the layer space of Na-Montmorillonite (Na-MMT). In the preparation, DDA and PAA were employed to cap the pre-synthesized gold colloidal particles and then intercalated into Na-MMT, and the Au (en)2Cl3was directly intercalated to Na-MMT through cation exchange. X-ray diffraction (XRD), fluorescence analysis (XRF) and transmission electron microscopy (TEM) were used to characterize the prepared samples. The results showed that the gold colloid modified by dodecylamine (DDA) and po

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40

Kosakowski, Georg, Sergey V. Churakov, and Tres Thoenen. "Diffusion of Na and Cs in montmorillonite." Clays and Clay Minerals 56, no. 2 (2008): 190–206. http://dx.doi.org/10.1346/ccmn.2008.0560205.

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Leroy, Philippe, Maximilian Weigand, Guillaume Mériguet, et al. "Spectral induced polarization of Na-montmorillonite dispersions." Journal of Colloid and Interface Science 505 (November 2017): 1093–110. http://dx.doi.org/10.1016/j.jcis.2017.06.071.

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Balek, V., M. Beneš, Z. Málek, G. Matuschek, A. Kettrup, and S. Yariv. "Emanation thermal analysis study of Na-montmorillonite and montmorillonite saturated with various cations." Journal of Thermal Analysis and Calorimetry 83, no. 3 (2006): 617–23. http://dx.doi.org/10.1007/s10973-005-7424-y.

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García, N. J., and J. C. Bazán. "Electrical conductivity of montmorillonite as a function of relative humidity: La-montmorillonite." Clay Minerals 44, no. 1 (2009): 81–88. http://dx.doi.org/10.1180/claymin.2009.044.1.81.

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AbstractThe conductivity of La-montmorillonite was measured in the domain of water relative pressures (p/p0) of <1, and compared with the conductivites of Li- and Na-montmorillonite. La-montmorillonite shows smaller conductivity over the whole range of p/p0 studied. To explain this, theoretical considerations of the polarizing power and of the local stacking order induced by the exchangeable cation were addressed.

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Tuchowska, Magdalena, Barbara Muir, Mariola Kowalik, Robert P. Socha, and Tomasz Bajda. "Sorption of Molybdates and Tungstates on Functionalized Montmorillonites: Structural and Textural Features." Materials 12, no. 14 (2019): 2253. http://dx.doi.org/10.3390/ma12142253.

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Montmorillonite—the most popular mineral of the smectite group—has been recognized as a low-cost, easily available mineral sorbent of heavy metals and other organic and inorganic compounds that pollute water. The aim of this work was to determine the sorption mechanism and to identify the reaction products formed on the surface of montmorillonite and organo-montmorillonite after sorption of molybdates (Mo(VI)) and tungstates (W(VI)). Montmorillonites are often modified to generate a negative charge on the surface. The main objective of the study was to investigate and compare the features of N

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Ichikawa, Kosuke, and Haruo Sato. "Measurements of Thermodynamic Data of Water in Ca-Bentonite by Relative Humidity Method." Minerals 14, no. 5 (2024): 477. http://dx.doi.org/10.3390/min14050477.

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Buffer material (compacted bentonite), one of the engineered barrier elements in the geological disposal of a high-level radioactive waste, develops swelling stress due to groundwater penetration from the surrounding rock mass. Montmorillonite is the major clay mineral component of bentonite. Even previous studies provide few mechanical and thermodynamic data on Ca-montmorillonite. In this study, thermodynamic data on Ca-montmorillonite were obtained as a function of water content by measuring relative humidity (RH) and temperature. The activities of water and the relative partial molar Gibbs

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Gojaev E.M., Mammadova R.L., Akhmedova A.M., and Garibova S.N. "Complex dielectric permeability and optical characteristics of polypropylene + Na-=SUP=-+-=/SUP=- montmorillonite composites." Technical Physics 92, no. 6 (2022): 683. http://dx.doi.org/10.21883/tp.2022.06.54413.308-21.

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The paper presents the results of studying the frequency dependence of the real and imaginary parts of the dielectric constant of polypropylene modified with Na+ montmorillonite. Using the experimental values of the complex dielectric constant, the optical functions such as the real and imaginary parts of the refractive index, optical conductivity, reflection and absorption coefficients, the characteristic function of the electron energy losses of PP+x vol.% NaNa+ montmorillonite composites have been determined It is shown that on the basis of a high-pressure polymer with the use of Na + montm

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Kaluđerović, Lazar, Zorica P. Tomić, Rada Đurović-Pejčev, and Ljubomir Životić. "Adsorption behaviour of clomazone on inorganic and organically modified natural montmorillonite from Bogovina (Serbia)." Clay Minerals 55, no. 4 (2020): 342–50. http://dx.doi.org/10.1180/clm.2021.3.

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AbstractThe adsorption behaviour of the herbicide clomazone on inorganic and organically modified montmorillonite from the Bogovina deposit in Serbia was investigated. Montmorillonite was modified first with NaCl and then with organic complexes such as hexadecyltrimethylammonium bromide (HDTMA) and phenyltrimethylammonium chloride (PTMA). Changes in the surface properties and morphology of the montmorillonite before and after the modification with various concentrations of organic complexes were investigated using X-ray diffraction (XRD) and scanning electron microscopy (SEM). Adsorption of cl

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Salmas, Constantinos, Aris Giannakas, Petros Katapodis, Areti Leontiou, Dimitrios Moschovas, and Andreas Karydis-Messinis. "Development of ZnO/Na-Montmorillonite Hybrid Nanostructures Used for PVOH/ZnO/Na-Montmorillonite Active Packaging Films Preparation via a Melt-Extrusion Process." Nanomaterials 10, no. 6 (2020): 1079. http://dx.doi.org/10.3390/nano10061079.

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Nowadays, the shelf-life extension of foods is a topic of major interest because of its environmental and economic benefits. For this purpose, various methods like deep-freezing, ultra-high-temperature pasteurization, drying methods, use of chemicals, controlled-atmosphere preservation, ionizing irradiation, and were investigated. During the last years, the smart packaging for foods using natural biodegradable components is of great interest because it provides positive environmental fingerprint and high shelf-life extension. In the present work, a new nanostructured composite material, the Zn

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Liu, Hai Feng, Tong Jiang Peng, Hong Juan Sun, and Qiang Wei Xie. "Humidity Sensing Characteristics of Montmorillonite Ion Conductors." Advanced Materials Research 178 (December 2010): 344–49. http://dx.doi.org/10.4028/www.scientific.net/amr.178.344.

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. In order to exploit a kind of low cost and environment-friendly humidity sensing materials, a series of Li-modified montmorillonite ion conductors were prepared using the montmorillonite form Jimusaer in Xinjiang Province of China. The montmorillonite humidity sensing elements were made by the thick film technique on mica substrates. Then the structures of the samples were investigated by X-ray diffraction (XRD) and the humidity sensing characteristics of the elements were tested by an equipment of the resistance testing. The results indicate that the resistances of the montmorillonite humid

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Zeng, Chuanzi, and Motoyoshi Kobayashi. "Charging and Aggregation of Nano-Clay Na-Montmorillonite in the Presence of Ciprofloxacin." Nanomaterials 15, no. 5 (2025): 389. https://doi.org/10.3390/nano15050389.

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The transport and fate of antibiotics are significantly influenced by co-existing colloidal and nanosized substances, such as clay particles. Montmorillonite, a common clay mineral with a thin nano-sheet-like structure, enhances antibiotic (e.g., ciprofloxacin) mobility due to its strong adsorption properties. Nevertheless, little is known about how ciprofloxacin systematically influences the charging and aggregation properties of montmorillonite. This study examines the effect of ciprofloxacin on the electrophoretic mobility and hydrodynamic diameter of Na-montmorillonite under varying pH lev

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