Preparation, vibrational structure and dielectric properties studies of cotton linter and its derivatives

Nada, A. M. A.; Mohamed, Samar H.; Mongy, S. Abd El; Seoudi, R.

doi:10.1016/j.jnoncrysol.2009.09.016

Cited by 9 publications

(7 citation statements)

References 35 publications

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“…The LOI compares the peak intensity at ∼1429 cm −1 attributed to δ OH of C6–O6H in crystalline regions to the peak intensity at ∼896 cm −1 associated with amorphous cellulose. 55 The TCI compares the peak intensity at 1372 cm −1 associated with δ OH with that of the 2860 cm −1 peak due to ν CH, 56 and the hydrogen bonding index (HBI) compares the ratio of intensities of the peaks at 3345 cm −1 ν OH due to intra and intermolecular hydrogen bonding 57 and 1337 cm −1 due to δ OH of O2H and O3H. 58 We assessed LOI, TCI and HBI during the first ∼5 hours of the reaction where peaks in the hydride-OH region were clearly distinguishable (Fig.…”

Section: Resultsmentioning

confidence: 99%

Spatiotemporal dynamics of cellulose during enzymatic hydrolysis studied by infrared spectromicroscopy

Jeoh,

Nill,

Zhao

et al. 2024

Green Chem.

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Section: Resultsmentioning

confidence: 99%

Spatiotemporal dynamics of cellulose during enzymatic hydrolysis studied by infrared spectromicroscopy

Jeoh,

Nill,

Zhao

et al. 2024

Green Chem.

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“…Moreover, the occurrence of intense bands such as 1520.8, 1442.70 and 1381.90, and 535.90cm -1 which falls within 1600 -1300 and 800 -600cm -1 respectively are in support of the fact that the broad band is due to hydrogen-bonded OH adsorption of a hydroxyl (alcohol) functional group. The band around 2925.30cm -1 is due to the methylene carbon-hydrogen bond (C-H) stretching vibration [11][12][13]. The major band in the region of 1630.90 cm -1 is usually indicative of the presence of a carbonyl compound.…”

Section: Resultsmentioning

confidence: 99%

A Study on Processing and Chemical Composition of Date Pit Powder for Application in Enhanced Oil Recovery

Adewole

Sultan

2014

DDF

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Studies were conducted on method of processing and chemical compositions of date pit for possible applications in enhanced oil recovery. Date seed from the eastern province of Saudi Arabia were washed by sonication and sun dried. The dried seeds were ground, de-oiled and made into solutions using alkaline. Physicochemical properties and chemical compositions of the de-oiled date seed powder were investigated using SEM and FTIR. The properties of the powder solutions were investigated by evaluating their viscosifying properties. Results of elemental analysis showed that the powder contains 57.41 - 65.84% carbon and 34.16 - 41.35% oxygen. The peak values in the range 3369.6 - 3417.3cm-1 obtained from FTIR are indicative of the presence of OH functional groups. The results obtained from viscosity measurement revealed that date seed be utilized as viscosity modifier to alter the mobility ratio in enhanced oil recovery processes. In addition, the multiple hydroxyl functional groups contained in date pit powder can be made available for organic reactions to produce surfactants and polymeric polyols that can be used for wettability and interfacial tension (IFT) alteration as employed in enhanced oil recovery operations. Furthermore, more studies need to be done to investigate and improve other relevant properties of the powder solution so that it can be used in near reservoir conditions. Accordingly, future work will be focused on detailed investigation on the use of the powder to alter mobility ratio, wettability and IFT.

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“…There is a relaxation at frequency 10 5 to 10 6 Hz, which should be the rotation process of the end nitro-groups responding to the alternating eld even at high frequencies. 34 The relaxation at 10 3 Hz is considered to be the reorientation of the side-group nitrophenyl moieties, which is caused by the polarization of the molecular permanent dipole moments. 35,36 The strong inherent moment of nitrophenyl moieties enables them to reorient in response to external electric elds.…”

Section: Resultsmentioning

confidence: 99%

Macromolecules on nano-outlets responding to electric field and pH for dual-mode drug delivery

Zhu

Mao

et al. 2013

J. Mater. Chem. B

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Macromolecules responsive to both electric field and pH are modified on the outlets of mesoporous silica nanospheres to form a novel dual-mode drug delivery system. Dual drug delivery modes are indicated by the release patterns obtained by simulating the body's gastric and intestinal fluid ex vivo. In a pH 1.4 release medium (simulated gastric fluid, SGF) without an alternating electric field, only 8.5% of the total payload is found to leach in 8 h, whereas 50.3% and 60.2% of the total payload are released in the same time period by elevating the pH of the release medium or applying an alternating electric field. The two stimuli signals can work independently or corporately to regulate the release kinetics to form a dual-mode drug delivery mechanism, which makes it more flexible for use in certain complicated situations.

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Preparation, vibrational structure and dielectric properties studies of cotton linter and its derivatives

Cited by 9 publications

References 35 publications

Spatiotemporal dynamics of cellulose during enzymatic hydrolysis studied by infrared spectromicroscopy

Spatiotemporal dynamics of cellulose during enzymatic hydrolysis studied by infrared spectromicroscopy

A Study on Processing and Chemical Composition of Date Pit Powder for Application in Enhanced Oil Recovery

Macromolecules on nano-outlets responding to electric field and pH for dual-mode drug delivery

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