Preparation and evaluation of nanocrystalline cellulose aerogels from raw cotton and cotton stalk

Shamskar, Kobra Rahbar; Heidari, Hannaneh; Rashidi, Alimorad

doi:10.1016/j.indcrop.2016.01.044

Cited by 104 publications

(27 citation statements)

References 27 publications

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“…They revealed similarities, in transmittance, in the main regions highlighted in Figure 7. The broad band centred at around 3340 cm −1 , in all spectra, is attributed to the intramolecular hydrogen bonded O-H stretching vibration (νOH) [48], in particular, that formed between O(3)H-O(5) positions, adjacent to the β-glycosidic bond of cellulose I [16]. It is known that the hydroxyls, linked to C(2), C(3), and C(6) carbons of cellulose, contribute to the formation of various types of inter-and intra-molecular hydrogen bonds, whose presence not only has a strong influence on the physical properties of cellulose, such as solubility, hydroxyl reactivity, and crystallinity, but also plays an important role in the mechanical properties of the polymer [49].…”

Section: Ftir-atr Analysis Of Cellulose Nanocrystalsmentioning

confidence: 97%

Fast Production of Cellulose Nanocrystals by Hydrolytic-Oxidative Microwave-Assisted Treatment

et al. 2020

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In contrast to conventional approaches, which are considered to be energy- and time-intensive, expensive, and not green, herein, we report an alternative microwave-assisted ammonium persulfate (APS) method for cellulose nanocrystals (CNCs) production, under pressurized conditions in a closed reaction system. The aim was to optimize the hydrolytic-oxidative patented procedure (US 8,900,706), replacing the conventional heating with a faster process that would allow the industrial scale production of the nanomaterial and make it more appealing to a green economy. A microwave-assisted process was performed according to different time–temperature programs, varying the ramp (from 5 to 40 min) and the hold heating time (from 60 to 90 min), at a fixed reagent concentration and weight ratio of the raw material/APS solution. Differences in composition, structure, and morphology of the nanocrystals, arising from traditional and microwave methods, were studied by several techniques (TEM, Fourier transform infrared spectroscopy (FTIR)-attenuated total reflectance (ATR), dynamic light scattering (DLS), electrophoretic light scattering (ELS), thermogravimetric analysis (TGA), X-ray diffraction (XRD)), and the extraction yields were calculated. Fine tuning the microwave treatment variables, it was possible to realize a simple, cost-effective way for faster materials’ preparation, which allowed achieving high-quality CNCs, with a defined hydrodynamic diameter (150 nm) and zeta potential (−0.040 V), comparable to those obtained using conventional heating, in only 90 min instead of 16 h.

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Section: Ftir-atr Analysis Of Cellulose Nanocrystalsmentioning

confidence: 97%

Fast Production of Cellulose Nanocrystals by Hydrolytic-Oxidative Microwave-Assisted Treatment

et al. 2020

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“…Cotton is one of the important products of Gossypium herbaceum family with high volume production as industrial waste, and having cellulose content up to 80%, can be considered as a proper source for the fabrication of CNC. [ 17 ] These CNCs have the potential to be used as food additives to reduce the adverse effects of high fat product on health by substituting shortening or partially hydrogenated oils with CNCs, and as a consequence expand food quality and safety. [ 18 ] Almost 50% reduction in triglycerides hydrolysis was reported in simulated gastrointestinal tract, which could be due to the binding of fat droplets to NCs resulting in reduced fat level available for lipase activity or a disruption in the solubility of fat digestion products.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization Nanocrystalline Cellulose as a Food Additive to Produce Healthy Biscuit Cream

2021

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Nanocrystalline cellulose (CNC) has been extensively developed in various fields such as nanostructure and food systems enhancers. In this study, first a CNC is synthesized through a homogenizer–ultrasound technique plus acid hydrolysis and then its application in biscuit cream is investigated. The morphology results reveal the swelling capacity of the CNC increases 63%, over raw cellulose and the dynamic light scattering particle size is about 120 nm. The surface morphology results of the CNC shows a spherical shape with an average diameter of 89 nm. The results show an increase in the degree of crystallinity with decreasing thermal stability in the CNC. The best result of the oil stability associated with maintaining the sensory properties is related to the cream formulated with a 50:50 ratio of sunflower oil and shortening after being incorporated with CNCs. It is thus shown to be necessary to optimize the concentration of CNCs to control cream texture characteristics.

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“…Scanning electron microscope (SEM) images of different forms of nanocellulose materials. (a,b) Nanocrystalline cellulose obtained from cotton and cotton stalk pulps, adapted from[83]. (c,d) Surface of nanofibrillated cellulose from cotton, adapted from[84].…”

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confidence: 99%

A Review on Micro- to Nanocellulose Biopolymer Scaffold Forming for Tissue Engineering Applications

et al. 2020

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Biopolymers have been used as a replacement material for synthetic polymers in scaffold forming due to its biocompatibility and nontoxic properties. Production of scaffold for tissue repair is a major part of tissue engineering. Tissue engineering techniques for scaffold forming with cellulose-based material is at the forefront of present-day research. Micro- and nanocellulose-based materials are at the forefront of scientific development in the areas of biomedical engineering. Cellulose in scaffold forming has attracted a lot of attention because of its availability and toxicity properties. The discovery of nanocellulose has further improved the usability of cellulose as a reinforcement in biopolymers intended for scaffold fabrication. Its unique physical, chemical, mechanical, and biological properties offer some important advantages over synthetic polymer materials. This review presents a critical overview of micro- and nanoscale cellulose-based materials used for scaffold preparation. It also analyses the relationship between the method of fabrication and properties of the fabricated scaffold. The review concludes with future potential research on cellulose micro- and nano-based scaffolds. The review provides an up-to-date summary of the status and future prospective applications of micro- and nanocellulose-based scaffolds for tissue engineering.

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Preparation and evaluation of nanocrystalline cellulose aerogels from raw cotton and cotton stalk

Cited by 104 publications

References 27 publications

Fast Production of Cellulose Nanocrystals by Hydrolytic-Oxidative Microwave-Assisted Treatment

Fast Production of Cellulose Nanocrystals by Hydrolytic-Oxidative Microwave-Assisted Treatment

Preparation and Characterization Nanocrystalline Cellulose as a Food Additive to Produce Healthy Biscuit Cream

A Review on Micro- to Nanocellulose Biopolymer Scaffold Forming for Tissue Engineering Applications

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