Adsorption of reactive dyes from aqueous solution by silylated palygorskite

Xue, Ailian; Zhou, Shouyong; Zhao, Yijiang; Lü, Xiaoping; Han, Ping

doi:10.1016/j.clay.2010.03.011

Cited by 86 publications

(27 citation statements)

References 13 publications

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“…The spectrum of APTMS‐Pal shows a band at 2936 cm −1 corresponding to the stretching vibrations of CH bonds from the silane molecule ; no signals were found for the solvent used during surface modification. The band at 1650 cm −1 was attributed to OH flexing vibrations of coordinated, absorbed and zeolitic water ; it is probable that the above band could overlap the signal associated with vibrations of the amino groups from silane molecules at 1608 cm −1 .…”

Section: Resultsmentioning

confidence: 98%

“…The band at 1650 cm 21 was attributed to OH flexing vibrations of coordinated, absorbed and zeolitic water [14]; it is probable that the above band could overlap the signal associated with vibrations of the amino groups from silane molecules at 1608 cm 21 . Moreover, bands associated with the symmetric bending vibrations for NAH were observed at 1495 and 1390 cm 21 [30,31]. The experimental evidence suggests that the silane molecules were successfully grafted on the Pal surface.…”

Section: Pal Characterizationmentioning

confidence: 87%

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The effect of surface modification of Palygorskite on the morphology, mechanical, and thermal properties of Nylon 6/Palygorskite nanocomposites prepared by melt compounding

2017

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The effect of surface modification of Palygorskite (Pal) on the morphology and the mechanical and thermal properties of Nylon 6/Palygorskite nanocomposites, prepared by melt compounding, was investigated. A Pal mineral was purified, characterized, and surface modified separately with 3‐Aminopropyl trimethoxysilane and tributylhexadecyl‐phosphonium bromide in order to produce polymer nanoreinforcements. Organo‐Pals were characterized through SEM/EDX, FTIR, TGA, and XPS; surface energy was also determined. Experimental evidence confirmed the grafting of surface agents on the Pal surface; as expected, organo‐Pals exhibited high thermal stability and lower surface energy. Nylon 6/clay nanocomposites were melt‐compounded with different Pals at low Pal loadings. Pal dispersion was assessed by SEM and the thermal and mechanical properties were determined. In general, Pal exhibiting lower surface energy produced Nylon 6/Pal nanocomposites with improved Pal dispersion and properties. Pal particles favored the formation of γ crystalline form and increased the decomposition temperature of Nylon 6. The Pal aspect ratio in the Nylon 6/Pal nanocomposites was estimated from the experimental values of the elastic modulus using the Halpin–Tsai model; in addition, the Pal‐Nylon 6 interactions were estimated from the experimental values of the yield strength of nanocomposites with the Pukanszky's model. POLYM. COMPOS., 39:E1531–E1543, 2018. © 2017 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 98%

Section: Pal Characterizationmentioning

confidence: 87%

The effect of surface modification of Palygorskite on the morphology, mechanical, and thermal properties of Nylon 6/Palygorskite nanocomposites prepared by melt compounding

2017

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“…Bands associated with the symmetric bending vibrations for N-H due to the amino groups of the silane grafted on the surface of Pal were observed at 1495 cm −1 and 1390 cm −1 [44]. On the other hand, the bands at 2926 and 2855 cm…”

Section: Ft-irmentioning

confidence: 98%

“…The FT-IR spectrum for Pal-2 shows additional bands, for example, a band at 2930 cm −1 corresponding to the stretching vibrations of C-H bonds from the silane molecule [43,44]. Bands associated with the symmetric bending vibrations for N-H due to the amino groups of the silane grafted on the surface of Pal were observed at 1495 cm −1 and 1390 cm −1 [44].…”

Section: Ft-irmentioning

confidence: 99%

Effect of Surface Modification of Palygorskite on the Properties of Polypropylene/Polypropylene-g-Maleic Anhydride/Palygorskite Nanocomposites

Cisneros-Rosado

Uribe-Calderón

2017

International Journal of Polymer Science

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The effect of surface modification of palygorskite (Pal) on filler dispersion and on the mechanical and thermal properties of polypropylene (PP)/polypropylene grafted maleic anhydride (PP-g-MAH)/palygorskite (Pal) nanocomposites was evaluated. A natural Pal mineral was purified and individually surface modified with hexadecyl tributyl phosphonium bromide and (3-Aminopropyl)trimethoxysilane; the pristine and modified Pals were melt-compounded with PP to produce nanocomposites using PP-g-MAH as compatibilizer. The grafting of Pal surface was verified by FT-IR and the change in surface hydrophilicity was estimated by the contact angle of sessile drops of ethylene glycol on Pal tablets. The extent of Pal dispersion and the degree of improvement in both the mechanical and thermal properties were related to the surface treatment of Pal. Modified Pals were better dispersed during melt processing and improved Young's modulus and strength; however, maximum deformation tended to decrease. The thermal stability of PP/PP-g-MAH/Pal nanocomposites was considerably improved with the content of modified Pals. The degree of crystallinity increased with Pal content, regardless of the surface modification. Surfactant modified Pal exhibited better results in comparison with silane Pal; it is possible that longer alkyl chains from surfactant molecules promoted interactions with polymer chains, thereby improving nanofiller dispersion and enhancing the properties.

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“…Activated carbon [6], agriculture wastes [7,8], biopolymers [9], humin [10], eggshell biocomposite [11], Corynebacterium glutamicum [12], clinoptilolite [5], and palygorskite [13] have been studied as an adsorbent for the removal of reactive dyes. However, recent studies focused on the application of composites for the enhanced removal of dyes from aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

Competitive adsorption of Reactive Orange 16 and Reactive Brilliant Blue R on polyaniline/bacterial extracellular polysaccharides composite—A novel eco-friendly polymer

Janaki

Vijayaraghavan

Ramasamy

et al. 2012

Journal of Hazardous Materials

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Adsorption of reactive dyes from aqueous solution by silylated palygorskite

Cited by 86 publications

References 13 publications

The effect of surface modification of Palygorskite on the morphology, mechanical, and thermal properties of Nylon 6/Palygorskite nanocomposites prepared by melt compounding

The effect of surface modification of Palygorskite on the morphology, mechanical, and thermal properties of Nylon 6/Palygorskite nanocomposites prepared by melt compounding

Effect of Surface Modification of Palygorskite on the Properties of Polypropylene/Polypropylene-g-Maleic Anhydride/Palygorskite Nanocomposites

Competitive adsorption of Reactive Orange 16 and Reactive Brilliant Blue R on polyaniline/bacterial extracellular polysaccharides composite—A novel eco-friendly polymer

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