Properties of nanocellulose isolated from corncob residue using sulfuric acid, formic acid, oxidative and mechanical methods

Liu, Chao; Li, Bin; Du, Hao; Liang, Dong; Zhang, Yuedong; Yu, Guang; Mu, Xindong; Peng, Hui

doi:10.1016/j.carbpol.2016.06.025

Cited by 304 publications

(168 citation statements)

References 53 publications

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“…For industrial uses, the addition of nanocellulose to a polymer matrix is one of the effective ways to reduce the oxygen transmission rate in packaging application; however, the slightly lower crystallinity of CNC H2SO4 might have a negative effect on its gas barrier property [22,37]. …”

Section: Resultsmentioning

confidence: 99%

“…This was presumably due to the attaching of sulfate groups on fiber surface during the hydrolysis step, which clearly reduced the activation energy for the degradation of nanocellulose product, making the nanomaterial less resistant to pyrolysis. Additionally, the lower degradation temperature of CNC H2SO4 could be due to the smaller fiber dimension, resulting in more surface areas exposed to the heat source and the partial disruptions of crystal structure compared to that of cellulose precursors [22]. These findings are in good accordance with Kallel’s study [56], in which the nanocellulose isolated from garlic straw by H 2 SO 4 hydrolysis started to degrade at a lower decomposition temperature (200 °C) than that of its starting material (220 °C).…”

Section: Resultsmentioning

confidence: 99%

“…In fact, mechanical refining could efficiently separate the microfibrils, but the high crystalline ordered structure might be broken due to the lower selectivity of high shearing force, resulting in a lower crystallinity. Likewise, the TEMPO-oxidation process may turn some of the crystalline cellulose molecules into disordered structures during the oxidation and the resultant CNF product exhibited a lower CrI value, even compared to its starting material [22]. Ultrasonication is another renowned way for CNF fabrication in which 20–50 kHz of ultrasound is applied to defibrillate cellulose for cell disruption.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Easy Fabrication of Highly Thermal-Stable Cellulose Nanocrystals Using Cr(NO3)3 Catalytic Hydrolysis System: A Feasibility Study from Macro- to Nano-Dimensions

et al. 2017

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This study reported on the feasibility and practicability of Cr(NO3)3 hydrolysis to isolate cellulose nanocrystals (CNCCr(NO3)3) from native cellulosic feedstock. The physicochemical properties of CNCCr(NO3)3 were compared with nanocellulose isolated using sulfuric acid hydrolysis (CNCH2SO4). In optimum hydrolysis conditions, 80 °C, 1.5 h, 0.8 M Cr(NO3)3 metal salt and solid–liquid ratio of 1:30, the CNCCr(NO3)3 exhibited a network-like long fibrous structure with the aspect ratio of 15.7, while the CNCH2SO4 showed rice-shape structure with an aspect ratio of 3.5. Additionally, Cr(NO3)3-treated CNC rendered a higher crystallinity (86.5% ± 0.3%) with high yield (83.6% ± 0.6%) as compared to the H2SO4-treated CNC (81.4% ± 0.1% and 54.7% ± 0.3%, respectively). Furthermore, better thermal stability of CNCCr(NO3)3 (344 °C) compared to CNCH2SO4 (273 °C) rendered a high potential for nanocomposite application. This comparable effectiveness of Cr(NO3)3 metal salt provides milder hydrolysis conditions for highly selective depolymerization of cellulosic fiber into value-added cellulose nanomaterial, or useful chemicals and fuels in the future.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Easy Fabrication of Highly Thermal-Stable Cellulose Nanocrystals Using Cr(NO3)3 Catalytic Hydrolysis System: A Feasibility Study from Macro- to Nano-Dimensions

et al. 2017

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“…Furthermore, various other factors are listed as playing a significant role in the characteristic of CNCs. Liu et al studied the effect of the acid type on the properties of CNC isolated from corncob. They observed that the formic acid hydrolysis (F‐hydrolysis) led to higher crystalline fraction (63.8%) and longer rod‐like CNC, whereas the sulfuric acid hydrolysis yielded lower crystalline fraction (55.9%) and shorter rod‐like nanocellulose.…”

Section: Isolation Of Cnc By Acid Hydrolysismentioning

confidence: 99%

Functionalized cellulose nanocrystals as reinforcement in biodegradable polymer nanocomposites

et al. 2017

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This review describes the use of cellulose nanocrystals (CNC) as fillers in biodegradable polymer matrices over the past few years. The preparation and characterization of CNC‐based nanocomposites are highlighted here with a focus on thermophysical and mechanical properties. The characterization and isolation of nanocellulose from different raw material sources are discussed in detail, as well as different surface modifications. The addition of CNC in biodegradable polymer, combined with nanocellulose surface engineering and driven by sustainability trends, has the potential to impact various industrial sectors. POLYM. COMPOS., 39:E9–E29, 2018. © 2017 Society of Plastics Engineers

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“…Recently, different methods including sulfuric acid hydrolysis, formic acid hydrolysis, 2,2,6,6‐Tetramethyl‐1‐piperidinyloxy (TEMPO) oxidation, and mechanical treatment for the isolation of nanocellulose from corncob residue were studied and compared. The results indicated that formic acid hydrolysis produced longer CNCs than those obtained by sulfuric acid hydrolysis, while cellulose nanofibrils from Pulp Refiner (PFI) refining were the thickest in diameter and longest in length . The impressive work by Sacui et al .…”

Section: Introductionmentioning

confidence: 99%

Phase transition identification of cellulose nanocrystal suspensions derived from various raw materials

Zhang

Cheng

Chang

et al. 2017

J of Applied Polymer Sci

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Cellulose nanocrystals (CNCs) as attractive nanomaterials are widely distributed in higher plants, algae, and marine animals. Herein, three kinds of CNCs were isolated by sulfuric acid hydrolysis from cotton pulp, algae, and tunicate cotton, respectively. Their morphologies and size were characterized by scanning electron microscope and atomic force microscope. The results showed that the aspect ratio of CNCs was in the order of CNCs from cotton pulp (CCNCs) (15 ± 10) < CNCs (ACNCs) from algae (ACNCs) (18 ± 12) < CNCs from tunicate (TCNCs) (75 ± 60). The phase transitions of CNC suspensions were also determined by phase diagram and rheological experiments. Two critical concentrations from isotropic to biphasic phase (Ci) and from biphasic to anisotropic phase (Ca) were measured and calculated, indicating that CNCs with higher aspect ratio reached Ci and Ca at lower concentration. Furthermore, the critical concentrations were also checked by polarized optical microscopy measurement. This work provided important information for construction of CNCs reinforced nanocomposites and investigation of CNCs chiral nematic liquid crystals. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45702.

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Properties of nanocellulose isolated from corncob residue using sulfuric acid, formic acid, oxidative and mechanical methods

Cited by 304 publications

References 53 publications

Easy Fabrication of Highly Thermal-Stable Cellulose Nanocrystals Using Cr(NO3)3 Catalytic Hydrolysis System: A Feasibility Study from Macro- to Nano-Dimensions

Easy Fabrication of Highly Thermal-Stable Cellulose Nanocrystals Using Cr(NO3)3 Catalytic Hydrolysis System: A Feasibility Study from Macro- to Nano-Dimensions

Functionalized cellulose nanocrystals as reinforcement in biodegradable polymer nanocomposites

Phase transition identification of cellulose nanocrystal suspensions derived from various raw materials

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