Sulfonated Cellulose Ball Milling

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-

A rapid and quantitative synthesis of xanthene derivatives ...

2021-6-18 · A rapid and quantitative synthesis of xanthene derivatives using sulfonated graphitic carbon nitride under ball-milling. Omid Hosseinchi Qareaghaj, Chemistry and Chemical Engineering Research Center of Iran, Tehran, Iran. Search for more papers by this author. Mohammad Ghaffarzadeh,

Acid-Assisted Ball Milling of Cellulose as an Efficient ...

Ball milling of cellulose in the presence of a catalytic amount of H2SO4 was found to be a promising pre-treatment process to produce butyl glycosides in high yields.

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

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. …

Hydrothermally Stable Sulfonated Carbons as Solid Acid ...

The propensity of cellulose to undergo auto-hydrolysis could be enhanced by amorphizing its crystal structure through mechanical pretreatment in ball-mill. A heterogeneously catalyzed hydrolysis was achieved through mechanocatalytic processes facilitated by the concerted ball-milling (CBM) of the sulfonated carbon with the substrate.

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

Ball-milled woods with two particle sizes were prepared by ball milling for 80min or 120min (BMW80, BMW120) and then enzymatically hydrolyzed. 78.3% cellulose conversion of BMW120 was achieved, which was three times as high as the conversion of BMW80.

Study on cellulose (96% crystalline) hydrolysis ...

2019-8-6 · In this work, the combined effects of microwave reactor and sulfonated bamboo catalyst in the hydrolysis of previously untreated cellulose (96% of crystallinity with 3.61 nm average crystallite size) at higher temperature were studied. The synthesized catalyst was characterized by FTIR, XRD, SEM, elemental analysis, TGA coupled with mass spectrophotometer, ammonia temperature-programmed ...

Mechanochemistry-assisted hydrolysis of softwood over ...

2019-10-18 · Ball-milling induced amorphization promotes a substantially higher substrate reactivity, because homogeneous hydrolysis occurs preferentially from less ordered structural domains in cellulose. In contrast, concerted ball-milling (CBM) of cellulose with the sulfonated carbon promotes a heterogeneously catalyzed hydrolysis to soluble ...

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

2017-8-1 · The significantly reduced Cr in further milling indicated that the sufficient ball milling treatment time or enough small particle size resulted in the effective destruction of the crystalline structure in cellulose (Zhang et al., 2015, Jiang et al., 2016). The Cr HR80 was higher than the Cr HMW, and Cr HR120 have an improvement as well.

Effects of ball milling on the structure of cotton cellulose

2019-2-24 · Keywords Amorphous cellulose Ball milling Cellulose degradation Crystal structure Rietveld refinement Introduction Cellulose is often described as a two-phase material, with both crystalline and amorphous domains. It is widely thought that crystalline materials are stronger and less-reactive than their amorphous counterparts.

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

Ball milling for cellulose depolymerization and ...

2019-6-1 · To reveal the structural changes of cellulose after ball milling pretreatment, the crystallinity was monitored by XRD patterns ().For microcrystalline cellulose (BM0), three characteristic reflections, i.e., (101), (10 1 ¯) and (002), of Cellulose I were observed is observable that the characteristic shape of Cellulose I crystal structure became less intense as the ball milling time ...

Enhanced hydrolysis of cellulose by highly dispersed ...

2  · 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).

Cellulose Nanofibril-Based Flame Retardant and Its ...

2020-7-13 · A cellulose nanofibril-based flame retardant has been developed by phosphorylation of cellulose with P 2 O 5, promoted by ball milling and followed by treatment with melamine. The width of cellulose nanofibrils obtained through a combination of chemical and mechanical action was 1.2–4.8 nm.

Fast catalytic conversion of recalcitrant cellulose into ...

2016-8-1 · Intense ball-milling of cellulose with a solid catalyst, e.g., together with acidic carbons, is required to improve such contact. 21 The utilization of ionic liquids (ILs) as reaction media, which are able to dissolve cellulose, has brought a significant enhancement in the catalytic efficiency for the hydrolysis of cellulose to glucose and LA ...

_

2. Feng Shen, Shuang Sun, Jirui Yang, Mo Qiu, Xinhua Qi*, Coupled pretreatment with liquid nitrogen and ball milling for enhanced cellulose hydrolysis in water, ACS Omega, 2019, 4(7): 11756-11759 DOI: 10.1021/acsomega.9b01406

Hydrolysis of Cellulose Selectively into Glucose Over ...

2009-4-10 · A sulfonated activated-carbon (AC-SO 3 H) catalyst selectively hydrolyzes cellulose with β-1,4-glycosidic bonds into glucose in the catalytic hydrothermal reactions at temperatures around 423 K. The AC-SO 3 H catalyst with the hydrothermal pre-treatment has the excellent catalytic properties attributed to the high hydrothermal stability and the strong acid sites of sulfo functional groups.

Sulfonated cellulose nanofibrils obtained from wood pulp ...

2013-1-21 · Sulfonated cellulose nanofibrils obtained from wood pulp through regioselective oxidative bisulfite pre-treatment ... Characterization of highly accessible cellulose microfibers generated by wet stirred media milling (2010) Henrikki ...

Supporting Information recoverable sulfonated ...

2016-10-27 · Arrhenius plot of ethanolysis of cellulose to ethyl levulinate on 5-Cl-SHPAO Table 2S. Properties of selected pure cellulose powders Properties Type cellulose Pretreatment Particle size ( m) Crystallinity (CrI%) DP (# units) Avicel PH-101 Ball-milling 57 <5 116 Avicel PH-101 None 68 79 161 Sigmacell Type 20 None 29 76 168 S4

Mechanochemistry-assisted hydrolysis of softwood over stabl…

Reaction conditions: cellulose pretreated by ball-milling 0.05 g, catalyst 0.05 g, water 5 mL, reaction time 24 h, temperature 423 K. With this knowledge in mind, we focused on the hydrolytic conversion of cellulose on the new class of sulfonated silica/carbon nanocomposites ( Fig. 2 ).

Mechanocatalytic Depolymerization of Cellulose With ...

2018-3-22 · Aquivion PW98, sulfonated SBA-15 and sulfonated mesoporous carbon (CMK-3-SO 3 H) were either synthesized, or purchased, and initially screened as potential solid acid catalysts for the effective depolymerization of cellulose via ball-milling. More information on these solid acid catalysts are provided in the supporting information (SI).

Fast catalytic conversion of recalcitrant cellulose into ...

acids in the catalytic conversion of cellulose to glucose or LA has attracted much interest in recent years.49,55,56 However, the transfer barrier between the solid catalyst and water-in-soluble cellulose dramatically suppresses its catalytic efficiency. Intense ball-milling of cellulose with a solid cata-

One Pot Synthesis of Bio-Ethylene Glycol from Cellulose

2021-10-27 · Long ball milling time would increase the contact between these two solids. The ball milling time and the functional groups on active carbon play important roles in this reaction. The results demonstrated that one pot synthesis of EG from cellulose is economically and technically feasible.

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) Mechanocatalytic Depolymerization of Cellulose …

2018-3-22 · cellulose with Aquivion PW 98 (mass of cellulose, 1 g; catalyst, 0.5 g; milling speed, 400 rpm; zirconium oxide balls diameter, d , 10 mm; ball-milling time, 24 h). water coming from the ...

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).

Crystallinity and surface state of cellulose in wet ball ...

2017-2-10 · We report the effect of wet ball-milling process under mild neutral salt conditions on the alteration of crystallinity and surface state of microcrystalline cellulose (MC). The ball-milling experiments were performed when the MC was immersed in H 2 O, NaCl aqueous solution, and KCl aqueous solution.

The ball‐milling of cellulose fibers and recrystallization ...

The type of lattice which develops on recrystallization was found to depend on the original lattice, the extent of ball-milling and the conditions of recrystallization. A highly ball-milled sample could be made to recrystallize as cellulose I, II, or IV depending on the conditions.

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 …

Extraction of Microfibrillar Cellulose From Waste Paper by ...

Though recycling of waste paper is widely practiced but usually it is downgraded to lower valued recycled waste paper. Based on this concern, we report the development of novel NaOH/urethane aqueous system for extraction of microfibrillated cellulose from waste paper. The purity of so obtained microfibrillated cellulose (MFC) was evaluated by morphological tests using scanning electron ...

Development of Solid Catalyst–Solid Substrate Reactions ...

2020-2-4 · Therefore, we ball-milled K26 and cellulose together to make a higher degree of solid–solid contact, which was named mix-milling. 42 In the dry ball-milling process, crystalline cellulose is broken into smaller amorphous particles by the impact of hard balls made of e.g. alumina. The small particles also cause agglomeration in the milling ...

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.