Effect of oxidation time on the properties of cellulose nanocrystals from hybrid poplar residues using the ammonium persulfate

Hua, Jiang; Wu, Yu; Han, Bin; Zhang, Yang

doi:10.1016/j.carbpol.2017.06.080

Cited by 55 publications

(40 citation statements)

References 37 publications

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“…The presence of C=O confirmed that the hydroxyl groups of the CNF had been oxidized to carboxyl groups during APS treatment. Results correlate with other authors [ 38 , 51 ] who reported that the hydroxyl groups at C6 of cellulose were regioselectively oxidized into carbonyl groups during APS treatment. The charges on the oxidized cellulose fibers enhance the swelling of the cellulose by electrostatic repulsion to facilitate the fibrillation into nanofibers [ 20 ].…”

Section: Resultssupporting

confidence: 91%

“…Both hydrogen peroxide and radicals penetrate the amorphous regions of cellulose and break down the disordered cellulose by co-hydrolyzing the 1,4-β bonds of the cellulose polymer chain [ 26 ], causing the observed loss of cellulose mass. Almost all authors who have worked with this method previously reported depolymerization of cellulose by APS treatment [ 26 , 29 , 30 , 31 , 33 , 35 , 38 , 39 , 41 , 43 , 44 , 45 , 46 , 49 , 50 , 51 ].…”

Section: Resultsmentioning

confidence: 99%

“…The proposed method can be used to produce CNF with a defined CI, using pretreatment with APS solution to increase the CI of cellulose and a high shear mixer to defibrillate fibers. It has been reported by Jiang et al that APS oxidation of cellulose material is easily controllable [ 38 ]. However, the majority of researchers have used APS treatment to disrupt the amorphous regions of the cellulose to reach the highest CI in order to obtain CNC.…”

Section: Resultsmentioning

confidence: 99%

“…However, the majority of researchers have used APS treatment to disrupt the amorphous regions of the cellulose to reach the highest CI in order to obtain CNC. By employing APS oxidation with a duration of 12–16 h, it has been possible to produce CNC with a CI in range from 86.8% [ 51 ], 87% [ 38 ] and up to 93.9% [ 43 ].…”

Section: Resultsmentioning

confidence: 99%

“…The main advantage of the APS method is that there is no need for purification of the raw material before nanocellulose production. Since 2011, the APS method has become widely used and a number of articles about obtaining of CNC by the APS method from different feedstock, such as cotton linter [ 26 , 30 , 31 , 32 , 33 ], flax [ 26 , 34 ], hemp [ 26 , 34 ], triticate [ 26 ], micro crystalline cellulose [ 26 , 33 , 34 , 35 , 36 ], wood pulp [ 26 , 30 , 32 , 37 , 38 ], bacterial cellulose [ 26 , 39 , 40 ], borer powder of bamboo [ 41 ], cornhob [ 42 ], Lyocell [ 43 ], oil palm empty fruit bunch [ 44 ], coconut fiber [ 45 ], and sugarcane bagasse [ 29 , 46 ], have been published.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Nanofibrillated Cellulose by Combined Ammonium Persulphate Treatment with Ultrasound and Mechanical Processing

et al. 2018

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Ammonium persulfate has been known as an agent for obtaining nanocellulose in recent years, however most research has focused on producing cellulose nanocrystals. A lack of research about combined ammonium persulfate oxidation and common mechanical treatment in order to obtain cellulose nanofibrils has been identified. The objective of this research was to obtain and investigate carboxylated cellulose nanofibrils produced by ammonium persulfate oxidation combined with ultrasonic and mechanical treatment. Light microscopy, atomic force microscopy (AFM), powder X-Ray diffraction (PXRD), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and Zeta potential measurements were applied during this research. The carboxylated cellulose suspension of different fractions including nanofibrils, microfibrils and bundles were produced from bleached birch Kraft pulp fibers using chemical pretreatment with ammonium persulfate solution and further defibrillation using consequent mechanical treatment in a high shear laboratory mixer and ultrasonication. The characteristics of the obtained nanofibrils were: diameter 20–300 nm, crystallinity index 74.3%, Zeta potential −26.9 ± 1.8 mV, clear FTIR peak at 1740 cm−1 indicating the C=O stretching vibrations, and lower thermostability in comparison to the Kraft pulp was observed. The proposed method can be used to produce cellulose nanofibrils with defined crystallinity.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis of Nanofibrillated Cellulose by Combined Ammonium Persulphate Treatment with Ultrasound and Mechanical Processing

et al. 2018

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Liquid crystal behavior of cellulose nanoparticles‐ethyl cellulose composites: Preparation, characterization, and rheology

Basta

Lotfy

Micky

et al. 2020

J of Applied Polymer Sci

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This work deals with assessing the approach for preparation of cellulose nanoparticles (CNPs) to be acted as synergistic component in liquid crystal (LC) ethyl cellulose composite (EC‐CNPs). In this respect different structures of CNPs were prepared by acid and salt agents. These prepared CNPs were characterized by carboxyl content, IR, transmission electron microscope (TEM), and zeta potential, while their composites with EC were characterized by rheological measurements as a key factor for measuring the critical concentration of LC behavior. The results showed that, the crystallinity of CNPs obtained by ammonium persulfate exceeded that prepared by sulfuric acid hydrolysis. TEM images of stained CNPs showed both methods led to produce nanoparticles have rod like shape with aspect ratio (L/W) between 7.69 ± 3 and 31.3 ± 5. For the rheological measurements, it demonstrated the efficient of incorporating the CNPs to EC (EC‐CNPs composites) to decrease the critical concentration of EC from 40 wt% to approximately 34 wt%.

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The aminosilane functionalization of cellulose nanocrystal aerogel via vapor‐phase reaction and its CO₂ adsorption characteristics

Jia

Wang

et al. 2021

J of Applied Polymer Sci

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The cellulose nanocrystal (CNC) aerogel was functionalized using aminosilane via vapor‐phase reaction and then the modified CNC aerogel was characterized by several techniques such as Fourier transform infrared spectroscopy, FE‐SEM, and elemental analysis. Finally, the CO2 adsorption on the aminosilane‐grafted CNC aerogel was featured using a dual‐site Langmuir adsorption model. The result showed triethylamine significantly enhanced the amine loading, being 7.06 mmol g−1 at 120°C. The primary amine groups in the aminosilane survived the vapor‐phase reaction. The amine groups were homogeneously distributed inside the aerogel due to its porous structure. The dual‐site Langmuir model could well describe its CO2 sorption characteristics. The adsorption capacity was up to 2.57 mmolCO2 g−1 at 25°C and 101.33 kPa, of which the chemisorption entirely dominated, and it decreased only 3%–4% after six runs. Therefore, these features positively suggested the vapor‐phase reaction provided a new and feasible method to functionalize CNC aerogel for the capture of CO2.

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Effect of oxidation time on the properties of cellulose nanocrystals from hybrid poplar residues using the ammonium persulfate

Cited by 55 publications

References 37 publications

Synthesis of Nanofibrillated Cellulose by Combined Ammonium Persulphate Treatment with Ultrasound and Mechanical Processing

Synthesis of Nanofibrillated Cellulose by Combined Ammonium Persulphate Treatment with Ultrasound and Mechanical Processing

Liquid crystal behavior of cellulose nanoparticles‐ethyl cellulose composites: Preparation, characterization, and rheology

The aminosilane functionalization of cellulose nanocrystal aerogel via vapor‐phase reaction and its CO₂ adsorption characteristics

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Effect of oxidation time on the properties of cellulose nanocrystals from hybrid poplar residues using the ammonium persulfate

Cited by 55 publications

References 37 publications

Synthesis of Nanofibrillated Cellulose by Combined Ammonium Persulphate Treatment with Ultrasound and Mechanical Processing

Synthesis of Nanofibrillated Cellulose by Combined Ammonium Persulphate Treatment with Ultrasound and Mechanical Processing

Liquid crystal behavior of cellulose nanoparticles‐ethyl cellulose composites: Preparation, characterization, and rheology

The aminosilane functionalization of cellulose nanocrystal aerogel via vapor‐phase reaction and its CO2 adsorption characteristics

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The aminosilane functionalization of cellulose nanocrystal aerogel via vapor‐phase reaction and its CO₂ adsorption characteristics