Spray drying of non-chemically prepared nanofibrillated cellulose: Improving water redispersibility of the dried product

Sungsinchai, Sirada; Niamnuy, Chalida; Wattanapan, Pattra; Charoenchaitrakool, Manop; Devahastin, Sakamon

doi:10.1016/j.ijbiomac.2022.02.153

Cited by 8 publications

(3 citation statements)

References 39 publications

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“…The characteristic peaks at 3420-3450 cm − 1 , 2900-2925 cm − 1 , and 894-898 cm − 1 are observed in the 4 surface-modi ed NFC, indicating that there are no changes in the basic chemical structure of cellulose (Sungsinchai et al, 2022). Notably, the peak at 1730 cm − 1 in the raw CS corresponds to the C = O stretching vibration of the acetyl and uronic ester groups from hemicellulose and lignin (Wang et al, 2022).…”

Section: Ftir Characterizationmentioning

confidence: 96%

A facile approach for preparing nanofibrillated cellulose from bleached corn stalk with tailored surface functions

et al. 2023

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This study proposed a facile, e cient, and energy-saving one-pot strategy to produce nanofabricated cellulose (NFC) from bleached corn stalk along with concurrent modi cations of the surface. High-speed mechanical shearing and mechanochemical activation (urea/NaOH, oxalic acid, citric acid, and mercaptopropyl trimethoxysilane) were involved in the strategy. The effects of different surface functionalization on the morphological, crystalline, chemical, and thermal properties of the NFC were investigated. The results suggested that the bleached corn stalk bers were separated into micro brils associated with abundant branched and networked cellulose nano brils through intensive mechanical shearing. NFC showed an average diameter of 23 nm and an average length of 1530 nm, with an aspect ratio of 67. The hydroxyl groups on the NFC surface were functionalized and modi ed by forming amide (urea/NaOH), carboxyl (oxalic acid/citric acid), and hydrogen bond (mercaptopropyl trimethoxysilane), respectively. This novel one-pot strategy could open up new application areas for production and surface functionalization of nanocellulose.

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Section: Ftir Characterizationmentioning

confidence: 96%

A facile approach for preparing nanofibrillated cellulose from bleached corn stalk with tailored surface functions

et al. 2023

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“…While there is no use of pectin from any resources in papermaking so far, its use with CNFs has been reported in alginate scaffolds for biomedical use [ 39 ], to improve water resistance of soybean protein [ 40 ], as a co-carrier to improve water redispersibility of spray-dried CNFs in water [ 41 ], to prepare aerogel with improved mechanical properties [ 42 ], and for the preparation of printing inks [ 43 , 44 ].…”

Section: Introductionmentioning

confidence: 99%

Cellulose Nanofibers/Pectin/Pomegranate Extract Nanocomposite as Antibacterial and Antioxidant Films and Coating for Paper

et al. 2022

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Bio-based polymer composites find increasing research and industrial interest in different areas of our life. In this study, cellulose nanofibers (CNFs) isolated from sugar beet pulp and nanoemulsion prepared from sugar beet pectin and pomegranate extract (PGE) were used for making films and used as coating with antioxidant and antimicrobial activities for paper. For Pectin/PGE nanoemulsion preparation, different ratios of PGE were mixed with pectin using ultrasonic treatment; the antibacterial properties were evaluated to choose the formula with the adequate antibacterial activity. The antioxidant activity of the nanoemulsion with the highest antimicrobial activity was also evaluated. The nanoemulsion with the optimum antibacterial activity was mixed with different ratios of CNFs. Mechanical, greaseproof, antioxidant activity, and antibacterial properties of the CNFs/Pectin/PGE films were evaluated. Finally, the CNFs/Pectin/PGE formulation with the highest antibacterial activity was tested as a coating material for paper. Mechanical, greaseproof, and air porosity properties, as well as water vapor permeability and migration of the coated layer from paper sheets in different media were evaluated. The results showed promising applicability of the CNFs/Pectin/PGE as films and coating material with antibacterial and antioxidant activities, as well as good stability for packaging aqueous, fatty, and acidic food products.

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“…There are a number of reported examples of using SD to dry o/w Pickering emulsions, however, many use non bio-based encapsulation materials or stabilizers with low commercial viability. , Specifically, spray dried emulsions stabilized by silica nanoparticles have been demonstrated and the few SD examples using bio-based and food grade stabilizers include cellulose nanocrystals, , cellulose nanofibrils, chitosan, and plant proteins . SD allows materials to not be affected by ice crystal formation, wherein solids are excluded from slow water freezing front and forced together, nevertheless, it subjects the material being dried to (a) high heat, which can damage sensitive encapsulated compounds and break emulsions; (b) capillary forces, which can collapse the microcapsule walls; and (c) high shear forces from fine atomization through the nozzle. − …”

Section: Introductionmentioning

confidence: 99%

Comparison of Techniques for Drying Cellulose Nanocrystal Pickering Emulsions into Oil Powders

Massicotte

Cranston

2022

ACS Sustainable Chem. Eng.

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A recent push for surfactant-free products driven by environmental awareness has propelled the use of bio-based materials in place of petroleum-derived components. However, both the formulation and processing need to be considered for scale-up feasibility and environmental sustainability. This work investigated the drying of corn oil-in-water emulsions stabilized by cellulose nanocrystals (CNCs), methyl cellulose (MC), and tannic acid via freeze drying, spray freeze drying, and spray drying. All three techniques produced oil powders with low moisture content and high encapsulated oil content (>90%). The oil powders could be redispersed in water by hand shaking to reform the original emulsion and could be stored dry for weeks without oil leakage (in the fridge). The release of oil from the powders on hydrophobic substrates (at room temperature) was controlled by changing the CNC and MC stabilizer content; the spray freeze dried samples were the most tunable. The three drying techniques imparted different surface morphologies that were linked to powder redispersibility and oil release properties. The lack of freezing (and associated ice crystal growth) in spray drying minimized oil droplet agglomeration, and it was the fastest, most scalable, and least energy-intensive drying technique of the three, but it was also the most sensitive to emulsion concentration and susceptible to instabilities associated with high temperature and shear stress. It was demonstrated that essential oils with a range of interfacial tensions and volatilities (e.g., jojoba, lavender, tea tree oil) could also be encapsulated in spray dried oil powders. This general encapsulation strategy can be tailored based on the drying technique selected, uses plant-based industrially-produced feedstocks, works with commercially relevant oils, and will hopefully contribute to the development of sustainable emulsions and oil powders for food, pharmaceutical, agricultural, and cosmetic applications.

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Spray drying of non-chemically prepared nanofibrillated cellulose: Improving water redispersibility of the dried product

Cited by 8 publications

References 39 publications

A facile approach for preparing nanofibrillated cellulose from bleached corn stalk with tailored surface functions

A facile approach for preparing nanofibrillated cellulose from bleached corn stalk with tailored surface functions

Cellulose Nanofibers/Pectin/Pomegranate Extract Nanocomposite as Antibacterial and Antioxidant Films and Coating for Paper

Comparison of Techniques for Drying Cellulose Nanocrystal Pickering Emulsions into Oil Powders

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