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Effect of Sulfate Groups from Sulfuric Acid Hydrolysis on

US20110105797A1 - Creatinol sulfate and synthesis method

A chemical compound of creatinol sulfate is formed by chemically reacting N-methyl-amino-ethanol,cyanamide,with sulfuric acid to produce the creatinol sulfate with relatively higher yield rate and purity,wherein the mol ratio of N-methyl-amino-ethanol,sulfuric acid,and cyanamide is approximately 2:1:2.Tuning Chiral Nematic Pitch of Bioresourced Photonicof sulfuric acid hydrolysis,the amorphous regions of cellulose fibers are removed,and the crystalline regions of cellulose fibers are cleaved into nanocrystals.[3] Meanwhile,the negatively charged sulfate ester groups are introduced onto the CNCs surface.[4] This is an important step for the stabilization of aqueous colloidal suspensions of CNCsTuning Chiral Nematic Pitch of Bioresourced Photonicof sulfuric acid hydrolysis,the amorphous regions of cellulose fibers are removed,and the crystalline regions of cellulose fibers are cleaved into nanocrystals.[3] Meanwhile,the negatively charged sulfate ester groups are introduced onto the CNCs surface.[4] This is an important step for the stabilization of aqueous colloidal suspensions of CNCs

The Influence of Pre-treatment Time and Sulfuric Acid

the sulfuric acid concentration of 57 wt.% to 60 wt.%,acid to cellulose ratio of 8 to 10,and temperature of 45 Effect of Sulfate Groups from Sulfuric Acid Hydrolysis on#176;C to 55 Effect of Sulfate Groups from Sulfuric Acid Hydrolysis on#176;C for 40 to 60 min.The mechanism of sulfuric acid hydrolysis of cellulose is usually explained by selective acid hydrolysis of disordered (amorphous) domains of cellulose nano-fibrils; theThe Effect of Mechanochemical Treatment of the Cellulose Sep 20,2016 Effect of Sulfate Groups from Sulfuric Acid Hydrolysis on#0183;Roman M,Winter W (2004) Effect of sulfate groups from sulfuric acid hydrolysis on the thermal degradation behavior of bacterial cellulose.Biomacromolecules 5(5):167177.Article Google Scholar Download referencesSynthesis of triazine derivative and its application in Effect of sulfate group from sulfuric acid hydrolysis on the thermal degradation behavior of bacterial cellulose, Biomacromolecules 5(5),1671-1677.DOI 10.1021/bm034519+ DOI 10.1021/bm034519+

Surface Chemical Compositions and Dispersity of Starch

Feb 27,2014 Effect of Sulfate Groups from Sulfuric Acid Hydrolysis on#0183;Surface chemical compositions of starch nanocrystals (SNC) prepared using sulfuric acid (H2SO4) and hydrochloric acid (HCl) hydrolysis were analyzed by X-ray photoelectron spectroscopy (XPS) and FT-IR.The results showed that carboxyl groups and sulfate esters were presented in SNC after hydrolysis with H2SO4,while no sulfate esters were detected in SNC during HCl-hydrolysis.Sulfuric Acid,ACSSubstance name Sulfuric Acid,ACS CAS-No. 7664-93-9 Product code LC25550 Formula H2SO4 Synonyms battery acid / brown acid / brown oil of vitriol / dihydrogen sulfate / dipping acid / electrolyte acid / nordhausen acid / oil of vitriol / sulphuric acid .1.2.Recommended use and restrictions on useSulfuric Acid (7664-93-9,13537-15-0,12772-98-4 Combined sugar yields for dilute sulfuric acid pretreatment of corn stover followed by enzymatic hydrolysis of the remaining solids.(Bioresource Technology,2005) Effect of Sulfate Groups from Sulfuric Acid Hydrolysis on the Thermal Degradation Behavior of Bacterial Cellulose (Biomacromolecules,2004)

Study of Cellulose Interaction with Concentrated Solutions

AbstractIntroductionExperimentalResults and DiscussionConclusionThe effect of the concentration of sulfuric acid (SA) and temperature on structure and properties of cellulose (MCC) had been studied.Investigations showed that solubility of the initial sample at the room temperature increased gradually in the range of the acid concentration from 50 to 60wt.% SA.When SA concentration reached 65wt.%,then MCC sample dissolved completely.Cellulose regenerated from 65wt.% SA had an amorphized structure and was characterized by high enzymatic digestibility.At increasSee more on hindawiPreparation of different polymorphs of cellulose from Jun 01,2019 Effect of Sulfate Groups from Sulfuric Acid Hydrolysis on#0183;The concentration of sulfuric acid has an effect on the crystallinity which has been reported elsewhere and a similar effect may have played a role for other acids as well .In this study,it was found that the crystallinity index of CII increased with the increase of hydrolysis time.Some results are removed in response to a notice of local law requirement.For more information,please see here.Previous123456NextSynthesis of triazine derivative and its application in Effect of sulfate group from sulfuric acid hydrolysis on the thermal degradation behavior of bacterial cellulose, Biomacromolecules 5(5),1671-1677.DOI 10.1021/bm034519+ DOI 10.1021/bm034519+Some results are removed in response to a notice of local law requirement.For more information,please see here.12345NextStudy of Cellulose Interaction with Concentrated Solutions Nov 28,2012 Effect of Sulfate Groups from Sulfuric Acid Hydrolysis on#0183;The effect of the concentration of sulfuric acid (SA) and temperature on structure and properties of cellulose (MCC) had been studied.Investigations showed that solubility of the initial sample at the room temperature increased gradually in the range of the acid concentration from 50 to 60 wt.% SA.When SA concentration reached 65 wt.%,then MCC sample dissolved completely.

Some results are removed in response to a notice of local law requirement.For more information,please see here.Products of Cellulose Hydrolysis Made by Treatment of

Roman M,Winter WT.Effect of sulfate groups from sulfuric acid hydrolysis on the thermal degradation behavior of bacterial cellulose.Biomacromolecules.2004; 5:16717.Selim IZ,Zikry AAF,Gaber SH.Physicochemical properties of prepared celluloseProducts of Cellulose Hydrolysis Made by Treatment of Roman M,Winter WT.Effect of sulfate groups from sulfuric acid hydrolysis on the thermal degradation behavior of bacterial cellulose.Biomacromolecules.2004; 5:16717.Selim IZ,Zikry AAF,Gaber SH.Physicochemical properties of prepared cellulose

Nanomaterials Free Full-Text Relationship between

Sep 08,2020 Effect of Sulfate Groups from Sulfuric Acid Hydrolysis on#0183;Understanding the sulfate groups introduced on the CNC surface has become essential to evaluate the thermal degradation behavior of crystals prepared by sulfuric acid hydrolysis.According to data reported in this study,it is possible to observe two stages in CNCs thermal degradation (Figure 5b).The first stage corresponds to the degradation Maren,R.,and William,T.W.2004.Effect of sulfate Effect of sulfate groups from sulfuric acid hydrolysis on the thermal degradation behavior of bacterial cellulose.Biomacromolecules ,5 1671-1677.has been cited by the following article:Maren,R.,and William,T.W.2004.Effect of sulfate Effect of sulfate groups from sulfuric acid hydrolysis on the thermal degradation behavior of bacterial cellulose.Biomacromolecules ,5 1671-1677.has been cited by the following article:

Journal of Physics Conference Series PAPER OPEN

sulfuric acid hydrolysis has higher dispersion stability because of the electrostatic repulsive forces among the crystalline particle effect of the present of sulfate groups on the cellulose surface [16].Figure 1.Structure of nanocrystalline cellulose (nanorod particles) isolated by .sulphuric acid hydrolysis ScieTech 2015 IOP PublishingIsolation,preparation,and characterization of nanofibers Aug 13,2010 Effect of Sulfate Groups from Sulfuric Acid Hydrolysis on#0183;Cellulose nanofibers were produced by hydrolyzing oil palm empty-fruit-bunches with sulfuric acid.The effect of hydrolysis time on the structure and properties of the nanofibers was investigated.Fourier transform infrared spectroscopy was employed to evaluate the change of chemical composition.Atomic force microscope images showed that the average thickness of the nanofibersImproved process for the production of cellulose sulfate Mar 13,2013 Effect of Sulfate Groups from Sulfuric Acid Hydrolysis on#0183;Effect of sulfate groups from sulfuric acid hydrolysis on the thermal degradation behavior of bacterial cellulose.Roman M,Winter WT.Biomacromolecules,5(5):1671-1677,01 Sep 2004 Cited by 107 articles PMID 15360274

Improved process for the production of cellulose sulfate

Mar 13,2013 Effect of Sulfate Groups from Sulfuric Acid Hydrolysis on#0183;Effect of sulfate groups from sulfuric acid hydrolysis on the thermal degradation behavior of bacterial cellulose.Roman M,Winter WT.Biomacromolecules,5(5):1671-1677,01 Sep 2004 Cited by 107 articles PMID 15360274Effects of acid hydrolysis conditions on cellulose Cellulose nanocrystals (CNCs) are frequently prepared by sulfuric acid hydrolysis of a purified cellulose starting material.CNC yields,however,are generally low,often below 20%.This study employs response surface methodology to optimize the hydrolysis conditions for maximum CNC yield.Effect of sulfate groups from sulfuric acid hydrolysis on Jan 01,2004 Effect of Sulfate Groups from Sulfuric Acid Hydrolysis on#0183;Sulfate groups,introduced during hydrolysis with sulfuric acid,are suspected to diminish the thermostability.To elucidate the relationship between the hydrolysis conditions,the number of sulfate groups introduced,and the thermal degradation behavior of cellulose crystals,bacterial cellulose was hydrolyzed with sulfuric acid under

Effect of Ultra-Turrax on Nanocellulose Produced by Acid

The increase in residue percentage after hydrolysis with sulfuric acid compared to MCC is related to the flame-retardant property of sulfate groups [2] [6] [15].Zinc oxide surface modification (NCC_ZnO) improved cellulose thermal stability compared to NCC_H,evidenced by a Tonset increase of 54C,as shown in Table 2 .Effect of Sulfate Groups from Sulfuric Acid Hydrolysis on When used as fillers in polymer composites,the thermostability of cellulose crystals is important.Sulfate groups,introduced during hydrolysis with sulfuric acid,are suspected to diminish the thermostability.To elucidate the relationship between the hydrolysis conditions,the number of sulfate groups introduced,and the thermal degradation behavior of cellulose crystals,bacterial Effect of Sulfate Groups from Sulfuric Acid Hydrolysis on Effect of Sulfate Groups from Sulfuric Acid Hydrolysis on the Thermal Degradation Behavior of Bacterial Cellulose Article in Biomacromolecules 5(5):1671-7 September 2004 with 792 Reads

Effect of Acid Hydrolysis on Starch Structure and

Sep 25,2013 Effect of Sulfate Groups from Sulfuric Acid Hydrolysis on#0183;A deep understanding of the effect of acid hydrolysis on starch structure and functionality is of great importance for starch scientific research and its industrial applications.During acid hydrolysis,amorphous regions are hydrolyzed preferentially,which enhances the crystallinity and double helical content of acid hydrolyzed starch.Effect of Acid Hydrolysis on Starch Structure and Sep 25,2013 Effect of Sulfate Groups from Sulfuric Acid Hydrolysis on#0183;A deep understanding of the effect of acid hydrolysis on starch structure and functionality is of great importance for starch scientific research and its industrial applications.During acid hydrolysis,amorphous regions are hydrolyzed preferentially,which enhances the crystallinity and double helical content of acid hydrolyzed starch.Cited by 60Publish Year 2016Author Shuping Dong,Michael J.Bortner,Maren RomanMaren,R.,and William,T.W.,Effect of sulfate groups Maren,R.,and William,T.W.,Effect of sulfate groups from sulfuric acid hydrolysis on the thermal degradation behavior of bacterial cellulose,Biomacromolecules,5,1671-1677,2004.has been cited by the following article:

Cited by 1038Publish Year 2004Author Maren Roman,William T WinterEffect of sulfate groups from sulfuric acid hydrolysis on

Effect of sulfate groups from sulfuric acid hydrolysis on the thermal degradation behavior of bacterial cellulose.Roman M(1),Winter WT.Author information (1)Department of Chemistry,Pulp and Paper Research Centre,McGill University,Montr Effect of Sulfate Groups from Sulfuric Acid Hydrolysis on#233;al,Quebec H3A 2A7,Canada.Cited by 1038Publish Year 2004Author Maren Roman,William T WinterEffect of Sulfate Groups from Sulfuric Acid Hydrolysis on Effect of Sulfate Groups from Sulfuric Acid Hydrolysis on the Thermal Degradation Behavior of Bacterial Cellulose Article in Biomacromolecules 5(5):1671-7 September 2004 with 792 ReadsCited by 1038Publish Year 2004Author Maren Roman,William T WinterAnalysis of the sulfuric acid hydrolysis of wood pulp for Dec 25,2016 Effect of Sulfate Groups from Sulfuric Acid Hydrolysis on#0183;CNCs prepared by sulfuric acid hydrolysis have sulfate groups on their surface resulting from partial esterification of the surface hydroxyl groups by the acid.The sulfate group density of the CNCs at the various hydrolysis conditions was determined by conductometric titration with a Mettler Toledo S47 SevenMulti pH/conductivity meter with an

Chiral nematic phase formation by aqueous suspensions of

May 31,2014 Effect of Sulfate Groups from Sulfuric Acid Hydrolysis on#0183;There is continuing interest in the growing family of nanocellulosic materials prepared from plant cell wall material.While most of the research on cellulose nanocrystals has focused on the product of sulfuric acid hydrolysis stabilized by surface sulfate half-esters,cellulose nanocrystals with surface carboxyl groups have also been prepared by oxidation of lignocellulosic materials with Characterization of Cellulose Nanocrystals Produced by Maren,R.,and William,T.W.,Effect of sulfate groups from sulfuric acid hydrolysis on the thermal degradation behavior of bacterial cellulose,Biomacromolecules,5,1671-1677,2004.InCharacterization of Cellulose Nanocrystals Produced by Maren,R.,and William,T.W.,Effect of sulfate groups from sulfuric acid hydrolysis on the thermal degradation behavior of bacterial cellulose,Biomacromolecules,5,1671-1677,2004.In

Aggregation behavior of aqueous cellulose nanocrystals

Natural anisotropic building-blocks such as cellulose nanocrystals (CNCs) have attracted considerable attention due to their biodegradability and nanometer-size.In this work the colloidal behavior of CNCs,obtained from sulfuric acid hydrolysis of microcrystalline cellulose,has been studied in presence of salts of different valences.The influence on the colloidal stability and nature of (PDF) Characterization of Cellulose Nanocrystals Produced Characterization of Cellulose Nanocrystals Produced by Acid-Hydrolysis from Sugarcane Bagasse as Agro-Waste. hydroxide,sulfuric acid,cellulose dialys is membrane remnant sulfate groups are .

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