Organophilic Clay with Useful Whiteness

Nag, Aniruddha; Hayakawa, T.; Minase, Makoto; Ogawa, Makoto

doi:10.1021/acs.langmuir.1c03467

Cited by 4 publications

(4 citation statements)

References 66 publications

(133 reference statements)

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“…Purified bentonite (Bengel Next LU, BN) was kindly donated by HOJUN Co., Ltd., Japan. The cation exchange capacity (CEC) of BN was 0.80 mequiv/g of dry BN . 4,4′-Diamino-α-truxillic acid dihydrochloride and 4,4′-diamino-α-truxillic acid dimethyl ester were synthesized by photocycloaddition and esterification of 4-aminocinnamic acid hydrochloride …”

Section: Methodsmentioning

confidence: 99%

Nanoarchitectonics of a Smectite with 4,4′-Diammonium-α-truxillic Acid and Its Methyl Ester for the Removal of o-Phenylphenol and Biphenyl from Water

Soontornchaiyakul,

Takada,

Kaneko

et al. 2024

Inorg. Chem.

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Adsorbents with hydrophilic and hydrophobic natures were designed by intercalating a bioderived molecule; 4,4′-diammonium-α-truxillic acid (4ATA) and 4,4′-diammoniumα-truxillic acid dimethyl ester (E4ATA), which both are bioderived molecules, into a smectite (purified bentonite) to concentrate ophenylphenol and biphenyl, respectively, from water. The adsorption isotherm showed high affinity between the 4ATAsmectite hybrid and o-phenylphenol with a high Langmuir constant (0.98 L mg −1 ). Meanwhile, the E4ATA-smectite hybrid adsorbed biphenyl with a high Langmuir constant (3.61 L mg −1 ). The adsorption properties of 4ATA-and E4ATA-smectite hybrid were contributed by the chemical characteristics of 4ATA and E4ATA in the interlayer space of the smectite.

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Section: Methodsmentioning

confidence: 99%

Nanoarchitectonics of a Smectite with 4,4′-Diammonium-α-truxillic Acid and Its Methyl Ester for the Removal of o-Phenylphenol and Biphenyl from Water

Soontornchaiyakul,

Takada,

Kaneko

et al. 2024

Inorg. Chem.

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“…MFS was employed to obtain emission spectra and excitation spectra of luminous marking coatings to analyze whether their luminous properties met the safety requirements [45]. SEM (JSM-5610LV, JEOL) was applied to study the surface morphology of the coatings.…”

Section: Usage Performance Of Luminous Marking Coatingmentioning

confidence: 99%

Preparation and Performance Characterization of an Active Luminous Coating for Asphalt Pavement Marking

et al. 2023

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For improving the night recognition of road markings and enhancing the driving safety of asphalt pavements, single-factor optimization is used to investigate the effects of the component materials, including luminescent power, pigment, filler, and anti-sedimentation agent, on the luminous performance of a coating. Additionally, their composition ratios are optimized using response surface methodology. A phosphorescent marking coating is prepared to investigate the micromorphology, excitation, and emission properties using scanning electron microscopy (SEM) and molecular fluorescence spectroscopy (MFS). The optimum thickness of the coating on an asphalt pavement is investigated, and the durability of the coating on asphalt pavement using a wheel rutting test is evaluated. The results show that the 300 mesh yellow-green luminous powder has the optimal overall performance, with an initial luminescence that exceeds that of orange and sky blue by three times. Initial brightness is mainly influenced by aluminate luminescent powder (ALP), which increases with the dosage. ALP and fumed silica powder (FSP) have a positive effect on brightness after centrifugation, and the effect of FSP dosage is more significant. ALP, rutile titanium dioxide powder (RTDP), and FSP influence the wear value of the coating, and the magnitude of the effect is RTDP > FSP > ALP. The optimal dosages of the main component are 27% ALP, 5% RTDP, and 0.8% FSP. The results of SEM show that the components in the coating are evenly dispersed, and the surface of the coating is rough. The peak excitation wavelength of 420 nm means that the coating has the best excitation effect in UV light, and its emission spectrum in the 440–760 nm wavelength range is well within the sensitive recognition zone of the human eye. The initial brightness gradually reached 4.38 cd/m2 when the coating thickness was increased from 482 μm to 546 μm, and the optimal application thickness of the luminous coating was determined to be 500 μm. At high and normal temperatures, the rutting stripping rates of the luminous marking coating are 16.8% and 8.2%, indicating its satisfactory durability. This study provides an experimental basis for the ratio optimization design of a luminous coating for asphalt pavements.

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“…In addition, it also has other advantages, such as simple synthesis, variable composition, friendly to the environment, large ion exchange capacity, and low cost. Because of these advantages, they are widely used in catalysts, catalyst support, adsorbent, and other fields. − In our previous work, we developed layered silicates NiFe saponite, Fe saponite, and Fe beidellite as electrode materials, which are based on valence changes in transition metals and silicon. − However, the hydroxyl groups on sheets are not involved in the electrochemical cycles. Besides being rich in hydroxyl, saponite containing Mg, Al, and Si has the characteristics of large layer spacing and rapid ion migration, which is conducive to electrode materials with low volume strain.…”

Section: Introductionmentioning

confidence: 99%

MgAl Saponite as a Transition-Metal-Free Anode Material for Lithium-Ion Batteries

Zhang

Yuan

et al. 2022

ACS Appl. Mater. Interfaces

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Transition-metal compounds (oxides, sulfides, hydroxides, etc.) as lithium-ion battery (LIB) anodes usually show extraordinary capacity larger than the theoretical value due to the transformation of LiOH into Li2O/LiH. However, there has rarely been a report relaying the transformation of LiOH into Li2O/LiH as the main reaction for LIBs, due to the strong alkalinity of LiOH leading to battery deterioration. In this work, layered silicate MgAl saponite (MA-SAP) is applied as a −OH donor to generate LiOH as the anode material of LIBs for the first time. The MA-SAP maintains a layered structure during the (dis)charging process and has zero-strain characteristic on the (001) crystal plane. In the discharging process, Mg, Al, and Si in the saponite sheets become electron-rich, while the active hydroxyl groups escape from the sheets and combine with lithium ions to form LiOH in the “caves” on sheets, and the LiOH continues to decompose into Li2O and LiH. Consequently, the MA-SAP delivers a maximum capacity of 536 mA h·g–1 at 200 mA·g–1 with a good high-current discharging ability of 155 mA h·g–1 after 1000 cycles under 1 A·g–1. Considering its extremely low cost and completely nontoxic characteristics, MA-SAP has great application prospects in energy storage. In addition, this work has an enlightening effect on the development of new anodes based on extraordinary mechanisms.

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Organophilic Clay with Useful Whiteness

Cited by 4 publications

References 66 publications

Nanoarchitectonics of a Smectite with 4,4′-Diammonium-α-truxillic Acid and Its Methyl Ester for the Removal of o-Phenylphenol and Biphenyl from Water

Nanoarchitectonics of a Smectite with 4,4′-Diammonium-α-truxillic Acid and Its Methyl Ester for the Removal of o-Phenylphenol and Biphenyl from Water

Preparation and Performance Characterization of an Active Luminous Coating for Asphalt Pavement Marking

MgAl Saponite as a Transition-Metal-Free Anode Material for Lithium-Ion Batteries

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