Characterization of organic phases in the interlayer of montmorillonite using FTIR and 13C NMR

Zhu, Jianxi; He, Hongping; Zhu, Lizhong; Wen, Xiaoyan; Deng, Feng

doi:10.1016/j.jcis.2004.12.048

Cited by 177 publications

(161 citation statements)

References 21 publications

(37 reference statements)

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“…These values are lower than those of the pristine CB[6] (3002 and 2934 cm −1 ). A similar effect was evidenced for the cetyltrimethyl ammonium bromide adsorption onto HNT (Cavallaro et al, 2012) and montmorillonite (Zhu, He, Zhu, Wen, & Deng, 2005) and it was related to the high packing density of organic moiety at the interface. Accordingly, the shifting of the stretching bands could be ascribed to the electrostatic interactions between the positively alumina groups of HNT inner surface and the dipole of carbonyl groups of CB[6] as sketched in Fig.…”

Section: Hnt/cb[6] Hybrid: Properties and Oil Solubilization Abilitysupporting

confidence: 69%

Halloysite nanotubes loaded with peppermint essential oil as filler for functional biopolymer film

Biddeci

Cavallaro

Blasi

et al. 2016

Carbohydrate Polymers

202

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Section: Hnt/cb[6] Hybrid: Properties and Oil Solubilization Abilitysupporting

confidence: 69%

Halloysite nanotubes loaded with peppermint essential oil as filler for functional biopolymer film

Biddeci

Cavallaro

Blasi

et al. 2016

Carbohydrate Polymers

202

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“…As shown from Fig. 2a, when the alkyl intercalated into bentonite, a broad band at 1456cm -1 splits with the increase of surfactant loading as described in the literature (Zhu et al 2005) for 1 CEC and 2 CEC. For the -CH 2 rocking modes, with the increase of surfactant loading , two well-resolved vibration bands at 794 cm -1 and 788cm -1 were observed, similar to -CH 2 scissoring.…”

Section: Ft-ir Analysissupporting

confidence: 57%

“…Then splitting of the -CH 2 rocking bands is due to the intermolecular interaction between the two adjacent hydrocarbon chains in a perpendicular orthorhombic sub cell (Zhu et al 2005 andKaraca et al 2013) and further requires an all-trans-conformation for its detection (Synder et al.1979). The band in the region of 950-1100 cm -1 corresponding to stretching vibration of Si-O group splits into a sharp band at 1033 cm -1 with a shoulder around 1088 cm attributed to perpendicular Si-O stretching ).…”

Section: Ft-ir Analysismentioning

confidence: 99%

Synthesis and characterization of organoclay modified with cetylpyridinium chloride

Banik

Jahan

Mostofa

et al. 2015

Bangladesh J. Sci. Ind. Res.

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Bentonite has been subjected to modification through ion-exchange reaction by 1-cetylpyridinum chloride. The modified samples were studied by X-ray diffraction (XRD) technique, Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM). The basal spacing of unmodified bentonite, determined by XRD was 14.99 Å and after modification it increased up to 16.97 Å and 16.22 Å at 1CEC and 2CEC. The FT-IR studies revealed structural differences between the modified and unmodified bentonite samples. The IR spectra of the modified bentonite showed the C-C stretching bands (1465 and 1462 cm -1 ) and C-H vibrations (near 2926 and 2852; 2854 cm -1 ). Results of the SEM study revealed a tendency towards lump formation and agglomeration of the organomodified clay particles of bentonite. The possibility of the use of new organoclay to adsorb oils from aqueous solution will be explored. Key words:Organoclay; Adsorption; Surfactant; Cation exchange capacity Available online at www.banglajol.info Bangladesh J. Sci. Ind. Res. 50(1), [65][66][67][68][69][70] 2015 *Corresponding author: E-mail: shanta_samina@yahoo.com Materials and methods MaterialsThe materials used for the synthesis of organoclay are bentonite from local market, 1-cetylpyridinum chloride, hydrochloric acid, acetic acid, sodium bicarbonate, ethanol, sodium chloride, sodium dithionite and hydrogen peroxide (30%) from Merck Germany. The surfactant used in this study is 1-cetylpyridinum chloride (CPC) with a purity of >96%. All the chemicals were used as received without any further purification. Organic solvents for the synthesis and characterization were AR grade and were obtained from Merck Germany. MethodBentonite clay sample was dried, grind and stored in a bottle. Purification of clay was done by the method of Tributh and Lagaly (Tributh and Lagaly, 1986). The cation exchange capacity (CEC) of the clay defined as the total amount of exchangeable cations that the soil can adsorb was estimated by Kjeldahl method (Cuadros and Linares, 1995). The CEC of purified bentonite was 110 meq/100g. Organoclay preparation and characterizationPurification of clay was done respectively by sodium-acetate acetic acid buffer, citrate buffer, sodium dithionite, sodium chloride, hydrochloric acid, sodium chloride and at last distilled water.For synthesis, 5g of purified bentonite was dispersed in 400 mL of water under continuous stirring for 1 h. The amount of surfactant added was calculated with the CEC value (110 meq/100 g clay) of bentonite. Desired amount of 1-cetylpyridinium was added to 200 mL of water in the separate container slowly. The reaction mixture was stirred for 4 hours at 80ºC. The resulting product was separated by filtration and washed with distilled water for 3 times. Then the product was washed with ethanol. Synthesized organoclay was dried in an oven at 80ºC for 48 hours and grind into powder. The concentrations of CPC were 1 CEC and 2 CEC of bentonite, respectively and labeled as OM1 and OM2.In Figure 1, chemical structure ...

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“…In the past decades, structural characteristics of OMt have been extensively investigated. The structural characteristics, such as basal spacing, surface area, porous structure and arrangement models of organic cations, have been reported in numerous publications [7][8][9][10][11][12][13][14][15][16]. Based on the obtained structural information, the potential correlation between microstructure and adsorption characteristics of organoclays has been proposed in several reports [1,[17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Expansion characteristics of organo montmorillonites during the intercalation, aging, drying and rehydration processes: Effect of surfactant/CEC ratio

Zhu

Wang

Zhu

et al. 2011

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Characterization of organic phases in the interlayer of montmorillonite using FTIR and 13C NMR

Abstract: The molecular conformation and mobility of the intercalated surfactant molecules, cetyltrimethylammonium bromide (CTMAB), have been studied using Fourier transform IR spectroscopy (FTIR) and high-resolution single-pulse

Cited by 177 publications

References 21 publications

Halloysite nanotubes loaded with peppermint essential oil as filler for functional biopolymer film

Halloysite nanotubes loaded with peppermint essential oil as filler for functional biopolymer film

Synthesis and characterization of organoclay modified with cetylpyridinium chloride

Expansion characteristics of organo montmorillonites during the intercalation, aging, drying and rehydration processes: Effect of surfactant/CEC ratio

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