Sulfonated Cellulose Ball Milling

Mechanochemistry-assisted hydrolysis of softwood over

2019-10-18 Ball-milling and concerted ball-milling Mechanical and mechanocatalytic pre-treatment of cellulose was performed in a sialon pot (80 mL) with sialon spheres (25 pcs. with 1 cm diameter) at 300 rpm by using a Fritsch Pulverisette 6. The total mass of cellulose and catalyst charged into the ball-mill was kept constant for all pre-treatments (9 g).

Ball milling for cellulose depolymerization and

2019-6-1 Ball milling was revealed to increase the accessibility of cellulose to the catalyst and disrupt the cellulose hydrogen-bonding networks, which facilitated the decomposition of cellulose.

Sulfonated silica/ carbon nanocomposites as novel

Onda et al. were the first to study the conversion of ball-mill pretreated cellulose over sulfonated activated carbon catalysts, and they achieved a notable glucose yield of 41%. 8 Suganuma et al. investigated the catalytic performance of amorphous carbon bearing SO 3 H, COOH, and OH functional groups. 9 The authors reported 68% cellulose conversion after 3 h reaction at 100 °C, yielding 4% glucose and 64%

A co-production of sugars, lignosulfonates, cellulose, and

2017-8-1 This new biorefinery is designed by using ball milling pretreatment, neutral sulfite delignification, and cellulose upgradation, generating four target products (sugars, lignosulfonates, cellulose, and cellulose nanocrystals). The product yields are balanced to provide an intuitive view of the integrated profitability of multi-products.

Ball milling: a green technology for the preparation and

Ball milling is a simple, fast, cost-effective green technology with enormous potential. One of the most interesting applications of this technology in the field of cellulose is the preparation and the chemical modification of cellulose nanocrystals and nanofibers.

Electronic Supplementary Information for Sulfonated

2010-9-8 Cellulose (Avicel PH-101, microcrystalline) was characterized (i) as received from Sigma-Aldrich and (ii) after 24 h ball-milling pretreatment. Ball-milling with 25 g of cellulose was carried out using ZrO2 balls (mass 7.5 g; diameter 1.8 cm). SEM images of cellulose before and after ball-milling

Catalytic ethanolysis of microcrystalline cellulose over a

2020-9-15 Pang et al. [ 24] employed sulfonated carbon at elevated temperatures for the hydrolysis of cellulose pretreated by ball-milling for 48 h. The sulfonation of the carbon materials was carried out by boiling the carbon materials in concentrated sulfuric acid (15 mL per gram of carbon) at 150–300 °C for 24 h under N 2 atmosphere.

(PDF) Sulfonated silica/carbon nanocomposites as novel

Hydrolytic conversion of cellulose over heterogeneous acids. Reaction conditions: cellulose pretreated by ball-milling 0.05 g, catalyst 0.05 g, water 5 mL, reaction time

Sulfonated cellulose nanofibrils obtained from wood pulp

2013-1-22 The consecutive pre-treatment of cellulose with periodate and bisulfite was used as a new potential method to promote nanofibrillation of hardwood pulp and to obtain nanofibrils with sulfonated functionality. Nanofibrils having typical widths of 10–60 nm were obtained from sulfonated celluloses having low anionic charge densities (0.18–0.51 mmol/g) by direct high-pressure homogenization

Catalytic ethanolysis of microcrystalline cellulose over a

2020-9-15 Pang et al. employed sulfonated carbon at elevated temperatures for the hydrolysis of cellulose pretreated by ball-milling for 48 h. The sulfonation of the carbon materials was carried out by boiling the carbon materials in concentrated sulfuric acid (15 mL per gram of carbon) at 150–300 °C for 24 h under N 2 atmosphere.

(PDF) Hydrolysis of cellulose with one-pot synthesized

Ball-milling pretreatment of cellulose improved levulinic acid yields by only a few percent, showing that the cellulose binding sites (−Cl) and catalytic sites (−SO3H) of the catalyst are key

(PDF) Sulfonated silica/carbon nanocomposites as novel

Hydrolytic conversion of cellulose over heterogeneous acids. Reaction conditions: cellulose pretreated by ball-milling 0.05 g, catalyst 0.05 g, water 5 mL, reaction time 24 h, temperature 423 K.

Ball milling: a green technology for the preparation and

Enhanced hydrolysis of cellulose by highly dispersed

2021-8-9 Amorphous cellulose-1 (pretreated by phosphoric acid) was more likely to be degraded than amorphous cellulose-2 (pretreated by ball-milling) because of the lower crystallinity, and the TRS and glucose yields reached 78.3% and 69.7%, respectively, after an 8-h reaction (Entry 9).

(PDF) Bridging the gap between cellulose chemistry and

IR spectra of cellulose before (a) and after ball-milling (b). +7 Schematic illustration of the proposed mechanism for formation of sulfonated silica/carbon nanocomposites (TEOS

Bridging the gap between cellulose chemistry and

2014-5-13 CH2 scissoring motion in the cellulose I crystal. The ball-milling allows the regular arrangement of the CH2OH group on C6 to relax into a more random one, resulting in a broader band at 1430 cm-1. Figure 4: IR spectra of cellulose before (a) and after ball-milling (b). 1.2 Hydrolysis of cellulose to glucose

A co-production of sugars, lignosulfonates, cellulose, and

Ball-milled woods with two particle sizes were prepared by ball milling for 80 min or 120 min (BMW 80, BMW 120) and then enzymatically hydrolyzed. 78.3% cellulose conversion of BMW 120 was achieved, which was three times as high as the conversion of BMW 80.

Zr/P/O catalyst for the direct acid chemo-hydrolysis of

2014-2-1 Amberlyst 15 (supplier Sigma–Aldrich) was also used as a reference sulfonated system. High energy ball milling of cellulose was carried out using a SPEX CertiPrep 8000-series Mixer/Mill, using vials with tungsten carbide-lined body and two 7/16 in. tungsten carbide spheres. 2.2. Reactivity experiments

Sulfonated cellulose nanofibrils obtained from wood pulp

(PDF) Hydrolysis of cellulose with one-pot synthesized

Ball-milling pretreatment of cellulose improved levulinic acid yields by only a few percent, showing that the cellulose binding sites (−Cl) and catalytic sites (−SO3H) of the catalyst are key

Catalytic ethanolysis of microcrystalline cellulose over a

A co-production of sugars, lignosulfonates, cellulose, and

2017-10-6 by using ball milling pretreatment, neutral sulﬁte deligniﬁcation, and cellulose upgradation, generating four target products (sugars, lignosulfonates, cellulose, and cellulose nanocrystals). The product yields are balanced to provide an intuitive view of the integrated proﬁtability of multi-products. In order to co-produce more prod-

Bridging the gap between cellulose chemistry and

Ball milling: a green technology for the preparation and

(PDF) Bridging the gap between cellulose chemistry and

IR spectra of cellulose before (a) and after ball-milling (b). +7 Schematic illustration of the proposed mechanism for formation of sulfonated silica/carbon nanocomposites (TEOS

A co-production of sugars, lignosulfonates, cellulose, and

Zr/P/O catalyst for the direct acid chemo-hydrolysis of

Selective Hydrolysis of Cellulose and Polysaccharides into

Ball-milling treatment of microcrystalline cellulose resulted in an insoluble material with β-1,4-glycosidic bonds but containing large noncrystalline regions as conﬁrmed by XRD and CP/MAS 13C NMR21). The re-action rate of cellulose hydrolysis using dilute sulfuric acid at 448 K increased with decreasing cellulose crys-tallinity21).

Recent advances in mechanochemical production of

2020-9-1 The yield from ball milling pretreated cellulose (84.5%) was higher than that from ionic liquid pretreated cellulose (78.0%). In addition to high efficiency, ball milling pretreatment is environmentally friendly with simple operations. Ball milling is a physical process that eliminates the use of potentially hazardous chemical reagents.

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