A feasible approach efficiently redisperse dried cellulose nanofibrils in water: vacuum or freeze drying in the presence of sodium chloride

Ma, Guangrui; He, Ming; Yang, Guihua; Ji, Xingxiang; Lucia, Lucian A.; Chen, Jiachuan

doi:10.1007/s10570-020-03591-y

Cited by 13 publications

(8 citation statements)

References 37 publications

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“…The preparation of CNF was adapted from procedures reported in previously published literatures [ 34 , 35 , 36 ]. The eucalyptus pulp soaked in deionized water and defibrated was finally diluted to a concentration of 1 wt% and subjected to a certain degree of 10 passes of mechanical grinding with a grinder (Supermasscolloider MK-CA6-5J, Masuko sangyo Co., Ltd., Kawaguchi, Japan).…”

Section: Methodsmentioning

confidence: 99%

Synthesis of Silver Nanoparticles and Detection of Glucose via Chemical Reduction with Nanocellulose as Carrier and Stabilizer

Zhang

Yang

et al. 2022

IJMS

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The application of silver nanoparticles (AgNPs) in antibacterial materials, glucose detection, etc., is of broad interest for researchers around the world. Nanocellulose with many excellent properties can be used as a carrier and stabilizer to assist in the synthesis of AgNPs. In this study, cellulose nanofibrils (CNFs) and cellulose nanocrystals (CNCs) were used to assist in the synthesis of AgNPs under the reduction of glucose and detection of glucose concentration under different conditions. Transmission electron microscopy (TEM) analysis showed that the AgNPs in the nanocellulose-AgNPs (NC-AgNPs) system were roughly spherical and randomly distributed on the nanocellulose. In the whole reaction system, when the concentration of nanocellulose is 0.11 mg/mL, the concentration of silver ammonia solution is 0.6 mM, and the mixing time is 2.5 h, according to the UV-Vis analysis, the absorbance of CNF-AgNPs at 425 nm exhibited a good linear relationship (R2 = 0.9945) with the glucose concentration range (5–50 μM), while the absorbance of CNC-AgNPs at 420 nm showed a good linear relationship (R2 = 0.9956) with the glucose concentration range (5–35 μM). The synthesis of NC-AgNPs can be further developed into a sensor with higher sensitivity and higher stability for detecting glucose concentration and a material with antibacterial effects.

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Section: Methodsmentioning

confidence: 99%

Synthesis of Silver Nanoparticles and Detection of Glucose via Chemical Reduction with Nanocellulose as Carrier and Stabilizer

Zhang

Yang

et al. 2022

IJMS

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“…Furthermore, the width of the absorption peak is noticeably broader due to the presence of multiple expansion vibrations associated with cellulose. 39 These overlapping vibrations contribute to a broader absorption peak. The absorption peak of the C−O bond in cellulosic alcohol is stretched, occurring at around 1080 cm −1 .…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Direct Carboxymethylation of Cellulose Fibers by Ternary Reactive Deep Eutectic Solvents for the Preparation of High-Yield Cellulose Nanofibrils

Ma,

Yin,

Shi

et al. 2024

ACS Sustainable Chem. Eng.

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Carboxymethylation-modified cellulose nanofibrils (CMCNF) were prepared from bamboo fibers through a pretreatment process using a ternary deep eutectic solvent (DES) system consisting of chloroacetic acid, urea, and choline chloride. Grinding treatment was also employed. The properties of the resulting CMCNF were characterized using various analytical instruments including a fiber image analyzer, field-emission scanning electron microscope, X-ray diffractometer, and atomic force microscope. The results indicated that ternary DES pretreatment has the capability to carboxymethylate-modify the raw fiber material while maintaining the crystalline structure of cellulose. Additionally, it induced a wetting and swelling effect on the fibers, leading to the successful disruption of strong hydrogen bonds and the rapid production of cellulose nanofibrils during mechanical treatment. The carboxymethylation alteration enhanced the ability of the resultant CNF to disperse and increased the stability of the suspension. Furthermore, extending the duration of DES pretreatment enhances the process of fiber fibrillation and diminishes fiber polymerization. The CMCNF produced exhibited a high aspect ratio, with diameters ranging from 10 to 50 nm and lengths extending to a few micrometers. This study presents a novel approach and concept for producing carboxymethylated nanofibrillated cellulose. It also introduces a straightforward, environmentally friendly, and effective method for mass production of bamboo pulp nanofibrillated cellulose. This advancement is anticipated to enhance the processing and utilization of bamboo fiber resources, thereby contributing to an increased overall value.

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“…It was observed that the TSI values of the salt samples CNF-NaCl and CNF-KCl were smaller than CNF-KCl-wash, CNF-NaCl-wash and CNF. This was due to the salt ions adsorbed on the surface of the CNF and form an electrical screening layer, which would change the agglomeration of the CNF thereby enhancing the stability of the suspension [ 21 ]. Compared with the TSI value of CNF-NaCl, the TSI value of CNF-KCl was lower.…”

Section: Resultsmentioning

confidence: 99%

“…According to Derjaguin–Landau–Verwey–Overbeek (DLVO) theory, the electrostatic interaction between CNFs with carboxyl groups on their surface depends on the types and concentrations of counter ions in the aqueous phase [ 20 ]. It has been reported that sodium chloride (NaCl) pretreatment before drying successfully redispersed CNF in an acceptable size range [ 21 , 22 ]. As one type of monovalent alkali metal salt, with similar physical and chemical properties of NaCl, potassium chloride (KCl) has the stronger metallicity than NaCl.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Effects of Sodium Chloride and Potassium Chloride on Spray Drying and Redispersion of Cellulose Nanofibrils Suspension

Yang

et al. 2021

Nanomaterials

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Cellulose nanofibrils (CNFs) were exposed to the same levels of potassium chloride (KCl) and sodium chloride (NaCl) before being subjected to spray drying. The effect of NaCl and KCl on the size of atomized droplets and the hydrogen bond retardation between CNFs was investigated by characterizing product morphology, particle size distribution, dispersion stability in aqueous system, and surface chemistry. The results showed that the CNF suspensions treated with KCl could be atomized into smaller droplets during spray drying, and then CNF powder with smaller sizes could be obtained. As the agglomeration was less, and the CNF with KCl addition had good dispersion stability after redispersion compared with CNF treated by NaCl. Therefore, KCl treatment was an effective method to reduce the agglomeration of CNF during spray drying.

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A feasible approach efficiently redisperse dried cellulose nanofibrils in water: vacuum or freeze drying in the presence of sodium chloride

Cited by 13 publications

References 37 publications

Synthesis of Silver Nanoparticles and Detection of Glucose via Chemical Reduction with Nanocellulose as Carrier and Stabilizer

Synthesis of Silver Nanoparticles and Detection of Glucose via Chemical Reduction with Nanocellulose as Carrier and Stabilizer

Direct Carboxymethylation of Cellulose Fibers by Ternary Reactive Deep Eutectic Solvents for the Preparation of High-Yield Cellulose Nanofibrils

Comparison of Effects of Sodium Chloride and Potassium Chloride on Spray Drying and Redispersion of Cellulose Nanofibrils Suspension

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