Hydrolysis of the Amorphous Cellulose in Cotton-Based Paper

Stephens, Catherine H.; Whitmore, Paul M.; Morris, Hannah R.; Bier, Mark E.

doi:10.1021/bm800049w

Cited by 59 publications

(53 citation statements)

References 34 publications

(45 reference statements)

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“…This is consistent with the much higher accessibility of amorphous cellulose in comparison to the crystalline domains of the cellulose (Hong et al 2007;Park et al 2010;Yu and Wu 2010). Stephens et al (2008b) likewise showed that amorphous cellulose was more susceptible to acid hydrolysis. Such attack, when it occurs in within paper, has the potential to destroy connections between the crystalline regions within fibers (Whitmore 2011), in addition to some of the bonded areas between fibers in paper.…”

Section: Meniscus Retraction and Concentration Of Solutessupporting

confidence: 79%

Deacidification of Acidic Books and Paper by Means of Non-aqueous Dispersions of Alkaline Particles: A Review Focusing on Completeness of the Reaction

Hubbe¹,

Smith²,

Zou³

et al. 2017

BioResources

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Section: Meniscus Retraction and Concentration Of Solutessupporting

confidence: 79%

Deacidification of Acidic Books and Paper by Means of Non-aqueous Dispersions of Alkaline Particles: A Review Focusing on Completeness of the Reaction

Hubbe¹,

Smith²,

Zou³

et al. 2017

BioResources

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“…an initial hydrolysis of the amorphous region which is more easily accessed by the solvent and a latter hydrolytic attack of the crystalline portion [31,32]. Previous researchers reported that one of the most important types of compounds present in bio-oil obtained from hydrothermal liquefaction of biomass were weak acids such as acetic acid, formic acid, and levulinic acid [5,6,9].…”

Section: Investigation Of Presumed Hydrothermal Liquefaction Mechanismmentioning

confidence: 99%

Understanding the Mechanism of Cypress Liquefaction in Hot-Compressed Water through Characterization of Solid Residues

Liu

Yang

et al. 2013

Energies

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Abstract:The mechanism of hydrothermal liquefaction of cypress was investigated by examining the effects of temperature and retention time on the characteristics of the solid residues remaining after liquefaction. The solid residues were divided into acid-soluble and acid-insoluble residues. Results showed the polymerization reactions also mainly occurred at low temperatures. The reactive fragments transformed into acid-insoluble solid residue in the form of carbon and oxygen through polymerization reactions. The process of cellulose degradation consists of two steps: an initial hydrolysis of the more solvent-accessible amorphous region and a later hydrolytic attack on the crystalline portion. Hemicelluloses were decomposed into small compounds during the initial stage of the cypress liquefaction process, and then these compounds may rearrange through polymerization to form acid-insoluble solid residues above 240 °C. The higher heating value of the solid residues obtained from liquefaction at 260-300 °C was 23.4-26.3 MJ/kg, indicating that they were suitable for combustion as a solid fuel.

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“…41 The slope k′ in the plot (1/M nt -1/M nt0 ) as a function of time t is the reaction rate constant. According to this model, the relationship between (1/M nt -1/M nt0 ) and aging time t should be linear.…”

Section: Hydroperoxides In Aged Papermentioning

confidence: 99%

Formation of Brown Lines in Paper: Characterization of Cellulose Degradation at the Wet−Dry Interface

2008

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Brown lines were generated at the wet-dry interface on Whatman paper No. 1 by suspending the sheet vertically in deionized water. Formic acid and acetic acid were quantified in three areas of the paper defined by the wet-dry boundary (above, below, and at the tideline) using capillary zone electrophoresis with indirect UV detection. Their concentration increased upon accelerated aging of the paper and was highest in the tideline. The hydroperoxides have been quantified using reverse phase high performance liquid chromatography with UV detection based on the determination of triphenylphosphine oxide produced from the reaction with triphenylphosphine, and their highest concentration was found in the tideline as well. For the first time, it was shown that various types of hydroperoxides were present, water-soluble and non-water-soluble, most probably in part hydroperoxide functionalized cellulose. After accelerated aging, a significant increase in hydroperoxide concentration was found in all the paper areas. The molar masses of cellulose determined using size-exclusion chromatography with multiangle light scattering detection showed that, upon aging, cellulose degraded significantly more in the tideline area than in the other areas of the paper. The area below the tideline was more degraded than the area above. A kinetic study of the degradation of cellulose allowed determining the constants for glycosidic bond breaking in each of the areas of the paper.

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Hydrolysis of the Amorphous Cellulose in Cotton-Based Paper

Cited by 59 publications

References 34 publications

Deacidification of Acidic Books and Paper by Means of Non-aqueous Dispersions of Alkaline Particles: A Review Focusing on Completeness of the Reaction

Deacidification of Acidic Books and Paper by Means of Non-aqueous Dispersions of Alkaline Particles: A Review Focusing on Completeness of the Reaction

Understanding the Mechanism of Cypress Liquefaction in Hot-Compressed Water through Characterization of Solid Residues

Formation of Brown Lines in Paper: Characterization of Cellulose Degradation at the Wet−Dry Interface

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