Comparison of attapulgites from different sources using TG/DTG and FTIR

Khorami, J.; Lemieux, Alain

doi:10.1016/0040-6031(89)87244-2

Cited by 39 publications

(15 citation statements)

References 4 publications

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“…The peak at 1662 cm −1 was associated with the hydroxyl deformation mode of zeolitic water, and the peak at 982 cm −1 was the bending vibration of SiOSi group. The peaks agreed well with the values reported by Xu et al and Khorami and Lemieux .…”

Section: Resultssupporting

confidence: 91%

Improved properties by hydrogen bonding interaction of poly(lactic acid)/palygorskite nanocomposites for agricultural products packaging

et al. 2013

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Poly(lactic acid) (PLA)/palygorskite (PA) nanocomposites were fabricated through melt blending. The significant finding by Fourier transformed infrared spectra and X‐ray photoelectron spectroscopy was that the hydrogen bonding interaction between PA surface and PLA matrix. Due to the hydrogen bonding interaction, the PA particles could be well dispersed and distributed in the PLA matrix, which had been further confirmed by scanning electron microscopy and transmission electron microscopy results. Therefore, PLA/PA nanocomposites revealed the significant improvements in tensile properties, resulting in the potential application for agricultural products packaging. Due to PA aggregates, the degree of hydrogen bonding decreased with the increasing content of PA in the matrix, and the appropriate PA content is 3% (by weight). POLYM. COMPOS., 35:468–476, 2014. © 2013 Society of Plastics Engineers

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Section: Resultssupporting

confidence: 91%

Improved properties by hydrogen bonding interaction of poly(lactic acid)/palygorskite nanocomposites for agricultural products packaging

et al. 2013

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“…4, the weight loss around 100°C is very obvious, which is due to the release of physically adsorbed water [26]. In the temperature range of 100-280°C, the weight loss is mainly attributed to the removal of the superficially adsorbed water, less severely bonded zeolitic H 2 O and a little part of the first coordinated water [27]. In the temperature range of 280-590°C, the residual first coordinated water and all the second coordinated water should be released from the crystal framework [28].…”

Section: Tg Analysismentioning

confidence: 99%

Facile fabrication of carbon/attapulgite composite for bleaching of palm oil

Tian

Wang

et al. 2015

Journal of the Taiwan Institute of Chemical Engineers

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“…At the edges exposed OH groups are neutralized by protons forming more resistant H 2 O molecules coordinated to the octahedral elements. The discernment of IR absorption bands due to these different kinds of water molecules and to the presence of OH groups coordinated to the metallic cations have been reported [1][2][3][4][5][6][7]. Frost et al [6] carried out this investigation not only in the mid-infrared region but also in the near-infrared region.…”

Section: Modification Of Palygorskite By Hcl and Organic Compoundsmentioning

confidence: 99%

Modification of fibrous silicates surfaces with organic derivatives: An infrared spectroscopic study

Frost

Mendelovici

2006

Journal of Colloid and Interface Science

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This contribution explores the interaction of the fibrous silicates, palygorskite, sepiolite and chrysotile with a wide range of organic agents. Infrared spectroscopy (IR) methods are essential for the characterization of solid surfaces and for the investigation of the kind of bonds formed between the surface of these silicates and the organic moieties. Thus, when sepiolite or palygorskite are treated, e.g., with polyurethanes, alcohols, isocyanates, amines or pyridines, specific SiNHC or SiOC bonds are derived from the linkage of the differently located OH groups in these fibrous silicates with the organic moieties. On the other hand, more stable, covalent SiOSiC bondings are formed when the fibrous silicates, especially chrysotile, are reacted with heterofunctional silylating agents like chlorosilanes or ethoxysilanes carrying, alkyl, alkenyl or aryl groups. Such reactions may occur in the presence or absence of HCl. An absorption band at 960 cm(-1)--which we assigned to SiOH groups--is detected only in the presence of HCl. The evolution of this band is related to the degree of grafting of the organic radicals with the silanol groups of the silicates. HCl-generated silanol groups are the main bridges for the coupling of organosilyl groups on chrysotile and other silicates by covalent bonding, leading the way to the preparation of interesting new materials, including fibrous sheet polymers.

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Comparison of attapulgites from different sources using TG/DTG and FTIR

Cited by 39 publications

References 4 publications

Improved properties by hydrogen bonding interaction of poly(lactic acid)/palygorskite nanocomposites for agricultural products packaging

Improved properties by hydrogen bonding interaction of poly(lactic acid)/palygorskite nanocomposites for agricultural products packaging

Facile fabrication of carbon/attapulgite composite for bleaching of palm oil

Modification of fibrous silicates surfaces with organic derivatives: An infrared spectroscopic study

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