Hizkeal Tsade Kara; Sisay Tadesse Anshebo; Fedlu Kedir Sabir
Abstract
Now a day, cellulose nonmaterial’s and its application advance extraordinary fascination in both industrial and academic research fields. This is owing to its special behaviors including advanced mechanical behaviors, amazing surface area, abundant hydroxyl groups for adjustment, and benign environmental ...
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Now a day, cellulose nonmaterial’s and its application advance extraordinary fascination in both industrial and academic research fields. This is owing to its special behaviors including advanced mechanical behaviors, amazing surface area, abundant hydroxyl groups for adjustment, and benign environmental properties. This review was focused on the study of recent preparation techniques of nanocellulose from lignocellulosic biomass and its fundamental applications in environmental and energy related areas. Mostly, the cellulose nanomaterial preparation techniques associated to ball milling are summarized. In addition to this, a perspective on its upcoming is specified. Again, this review will help the scientific community working on the effective preparation of cellulose nanomaterials from lignocellulosic biomass and its greatest conceivable applications in the upcoming day.
Melina E. Bracone; Leandro N. Luduena; Vera A. Alvarez
Abstract
Cellulose nanofibrils can be obtained from microcrystalline cellulose by acid hydrolysis processes. Under optimum hydrolysis conditions is possible to obtain cellulose nanofibers with high surface/volume ratio, high aspect ratio (length to diameter), high crystallinity and improved thermal stability. ...
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Cellulose nanofibrils can be obtained from microcrystalline cellulose by acid hydrolysis processes. Under optimum hydrolysis conditions is possible to obtain cellulose nanofibers with high surface/volume ratio, high aspect ratio (length to diameter), high crystallinity and improved thermal stability. All these parameters then determine their effectiveness as reinforcement in a polymer matrix. In this work, cellulose nanofibrils were obtained from commercial microcellulose supplied by Aldrich. The acid hydrolysis synthesis was optimized studying the effect of reaction time and temperature and acid solution concentration. The optimized parameters were selected so as to obtain fibers with high crystallinity, high aspect ratio with diameter in nanoscale and high thermal stability. The morphology and size (length and diameter) of the fibers was analyzed by Field Emission Scanning Electron Microscopy (FESEM), the chemical structure by Fourier Transform Infrared Spectroscopy (FTIR), thermal stability by Thermogravimetric Analysis (TGA) and crystallinity by X-ray Diffraction (XRD). Copyright © VBRI Press.
S. K. Shukla; G. C. Dubey;Ashutosh Tiwari; Anand Bharadvaja
Abstract
Cellulose has been the extracted from rice husk by chemical treatment with aqueous solution of sodium hydroxide. The physical properties of derived cellulose (water uptake and swelling behavior) has been investigated with view of different applications. The morphology and chemical structure were investigated ...
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Cellulose has been the extracted from rice husk by chemical treatment with aqueous solution of sodium hydroxide. The physical properties of derived cellulose (water uptake and swelling behavior) has been investigated with view of different applications. The morphology and chemical structure were investigated by Infrared spectroscopy (FT-IR), Scanning electron microscopy (SEM) and Thermogravimetry (TG) techniques. The results revealed the formation of homogeneous porous (micro size) membrane. Further, the UV-vis spectra of cellulose in different pH shows its responsiveness towards hydronium ion, which is suitable for drug delivery. Further, obtained cellulose was used for drug delivery under optimized pH.
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