Isolation and characterization of cellulose nanofibers from four plant cellulose fibers using a chemical-ultrasonic process

Chen, Wenshuai; Yu, Haipeng; Liu, Yixing; Hai, Yunfei; Zhang, Mingxin; Chen, Peng

doi:10.1007/s10570-011-9497-z

Cited by 450 publications

(232 citation statements)

References 58 publications

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“…In addition, the present finding was similar to several studies listed in Table 3, where the Tmax value of yielded nanocellulose obtained from various biomass sources rendered lower values than that of crude cellulose material. The Tmax values of yielded nanocellulose derived from wheat straw (Tmax = 332.2 °C) (Chen et al 2011), empty fruit bunch (Tmax = 339 °C) (Jonoobi et al 2011), and mulberry bark (Tmax = 335 °C) (Li et al 2009) are shown. Fortunately, all the cellulose nanoparticles were stable when the heating temperature was less than 280 °C.…”

Section: Morphological Study (Afm Analysis)mentioning

confidence: 99%

Preparation of Nanostructured Cellulose via Cr(III)- and Mn(II)-Transition Metal Salt Catalyzed Acid Hydrolysis Approach

Chen¹,

Lee²,

Hamid³

2016

BioResources

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Nanostructured cellulose was successfully prepared from native cellulose using a homogeneous catalytic H2SO4 hydrolysis pathway in the presence of Cr(III)-and Mn(II)-transition metal salts as the co-catalyst. The effect of transition metal salts with different valence states (Cr 3+ and Mn 2+) on the physicochemical properties (chemical characteristics, crystallinity index, nano-structure, thermal stability, and morphology) of prepared nanocellulose was investigated. Interestingly, TEM micrographs showed that the Cr(III)-treated and Mn(II)-treated nanocellulose exhibited a weblike nanostructured-surface with average diameters of 44.7 ± 13.2 nm and 58.4 ± 15.3 nm, respectively. XRD study revealed that the crystallinity of nanocellulose was increased because the catalytic degradation of the less crystalline regions of cellulose occurred at a faster rate than its crystalline phases. Cr(III)-treated nanocellulose was capable of rendering a higher crystallinity index (75.6 ± 0.1%) compared with Mn(II)-treated nanocellulose (72.3 ± 0.4%). Furthermore, a dynamic light scattering (DLS) study revealed that Cr(III)-treated nanocellulose showed a smaller distribution range (92% at 14 to 135 nm) compared with Mn(II)-treated nanocellulose (92% at 607 nm). A higher valence state for the Cr(III)-cation, with a trivalent state (+3), rendered a more effective hydrolysis reaction compared with the Mn(II)-cation, with a divalent state (+2), for preparing the nanocellulose.

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Section: Morphological Study (Afm Analysis)mentioning

confidence: 99%

Preparation of Nanostructured Cellulose via Cr(III)- and Mn(II)-Transition Metal Salt Catalyzed Acid Hydrolysis Approach

Chen¹,

Lee²,

Hamid³

2016

BioResources

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“…The yield of the process was estimated by comparing the obtained amount of NCC with the cellulose percentage present in the initial residual biomass. Concerning the NCC steps in Sections 2.2.4 and 2.2.5, some experimental procedures using an integrated approach of acid hydrolysis and ultrasonic treatment are available in the literature [26][27].…”

Section: Ultrasound Treatmentmentioning

confidence: 99%

Cellulose Nanocrystals Obtained from Cynara Cardunculus and Their Application in the Paper Industry

et al. 2014

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Biorefinery aims at designing new virtuous and high-efficiency energy chains, achieving the combined production of biofuels (e.g., bioethanol) and biobased products. This emerging philosophy can represent an important opportunity for the industrial world, exploiting a new kind of nano-smart biomaterials in their production chains. This paper will present the lab experience carried out by the Biomass Research Centre (CRB) in extracting cellulose nanocrystals (NCC) from a pretreated (via Steam Explosion) fraction of Cynara cardunculus. This is a very common and invasive arboreal variety in central Italy. The NCC extraction methodology allows the separation of the crystalline content of cellulose. Such a procedure has been considered in the literature with the exception of one step in which the conditions have been optimized by CRB Lab. This procedure has been applied for the production of NCC from both Cynara cardunculus and microcrystalline cellulose (MCC). The paper will discuss some of the results achieved using the obtained nanocrystals as reinforcing filler in a paper sheet; it was found that the tensile strength increased from 3.69 kg/15 mm to 3.98 kg/15 mm, the durability behavior (measured by bending number) changed from the value 95 to the value 141, and the barrier properties (measured by Gurley porosity) were improved, increasing from 38 s to 45 s.

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“…Besides, FTIR spectra were used to confirm the removal of lignin and hemicelluloses from various LBW samples. After strong alkaline treatment, no absorption peak was observed at 1735 cm −1 , which was attributed to the complete 3 International Journal of Polymer Science removal of hemicelluloses and/or lignin components [29]. In addition, no absorption peak attributed to the -C=C-stretching of aromatic rings of lignin was observed at 1513 cm −1 , thereby confirming that all lignin had been removed from cellulose fibres isolated from various LBW samples (Figure 1(b)) [30].…”

Section: Resultsmentioning

confidence: 80%

Controlled Depolymerization of Cellulose Fibres Isolated from Lignocellulosic Biomass Wastes

Pang

Voon

Chin

2018

International Journal of Polymer Science

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Various types of lignocellulosic biomass wastes (LBW) had been successfully converted into cello-oligomers with different chain lengths via a controlled depolymerization process. Cellulose fibres isolated from LBW samples were dissolved with room temperature ionic liquid (RTIL) in the presence of an acid catalyst, Amberlyst 15 DRY. The effects of reaction time on the degree of polymerization and yields of water-insoluble cello-oligomers formed were studied. Besides, the yields of water-soluble cello-oligomers such as glucose and xylose were also determined. The depolymerization of cellulose fibres isolated from LBW was observed to follow both second-order and pseudo-second order kinetics under specific conditions. As such, cello-oligomers of controllable chain lengths could be obtained by adjusting the duration of depolymerization process under optimized conditions.

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Isolation and characterization of cellulose nanofibers from four plant cellulose fibers using a chemical-ultrasonic process

Cited by 450 publications

References 58 publications

Preparation of Nanostructured Cellulose via Cr(III)- and Mn(II)-Transition Metal Salt Catalyzed Acid Hydrolysis Approach

Preparation of Nanostructured Cellulose via Cr(III)- and Mn(II)-Transition Metal Salt Catalyzed Acid Hydrolysis Approach

Cellulose Nanocrystals Obtained from Cynara Cardunculus and Their Application in the Paper Industry

Controlled Depolymerization of Cellulose Fibres Isolated from Lignocellulosic Biomass Wastes

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