Lignin inhibits autoxidative degradation of cellulose

Schmidt, John A.; Rye, Carl S.; Gurnagul, N.

doi:10.1016/0141-3910(95)87011-3

Cited by 69 publications

(40 citation statements)

References 19 publications

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“…Thus, lignin should inhibit auto-oxidative degradation of cellulose. 7 Lignin content in the range of 0-28% does not result in greater loss of strength properties upon aging. 8 Pyrolytic methods are commonly used in the analysis of agro-based materials and its component.…”

Section: Introductionmentioning

confidence: 97%

Characterization and aging of biotreated kraft bagasse pulp

Adel

2007

J of Applied Polymer Sci

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Strains of bacteria [Pseudomonas flurescens (Pf1 and Pf2); Bacillus subtilis (B)] were used for treatment of kraft bagasse pulp. Both of the bacterial treated kraft bagasse pulp (BKBP) and control (C) pulp samples were chelated with EDTA and then bleached with hydrogen peroxide. The effect of aging on paper brightness was investigated. The brightness change due to aging for both control sample and bleached bacterial treated (BBKBP) pulp are 19.38% and (5.99%-15.35%), respectively. The crystallinity index (CrI) is calculated for both control sample (C) and BBKBP via X-ray diffraction patterns. It was found that the CrI for BBKBP was increased by 4.46% compared with the control (C) sample. The relative intensity and assignment of absorption bands for BKBP) were studied via FTIR spectra. Pyrolytic behavior of the different samples was investigated by thermal gravimetric analysis and derivative thermogravimetric techniques. Calculations of the mass loss were used to elucidate the rate constant of decomposition and the activation energy.

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Section: Introductionmentioning

confidence: 97%

Characterization and aging of biotreated kraft bagasse pulp

Adel

2007

J of Applied Polymer Sci

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“…It is also possible that some of the degradation compounds produced during the tideline experiment act as anti-oxidants. Phenolic compounds such as in lignin have been shown to inhibit autoxidative degradation of cellulose (Schmidt et al 1995). Even though Whatman No.1 does not contain any lignin, aromatic compounds (furanic and phenolic) can arise from cellulose degradation (Lai 2001;Ramalho et al 2009).…”

Section: Aging Types B and Cmentioning

confidence: 99%

Degradation of cellulose at the wet-dry interface: I—study of the depolymerization

Jeong

Dupont²,

Rie³

2012

Cellulose

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The degradation of cellulose in paper due to the formation of a tideline at the wet-dry interface when paper is suspended in water was explored. SEC/ MALS was used to assess the molar mass, while ICP/ MS, SEM/EDS and CE/UV provided a qualitative and quantitative analysis of the elements and inorganic ions present in the paper. Immediately after the formation of the tideline, no significant depolymerization was observed at the wet-dry interface, despite the accumulation of water soluble brown and/or fluorescent degradation compounds and salts containing sodium, chlorine, sulfur and calcium. Various artificial aging configurations were applied to the paper with tidelines to evaluate the effect of the material accumulated at the wet-dry interface on the long-term stability of paper. The decrease in the molar mass of cellulose (above, at and below the tideline) differed depending on the type of aging, i.e. whether the entire sheet of paper was aged or whether small amounts of paper from the different areas were sampled and aged, individually or together, which evidences a complex degradation pathway. In the former aging configuration the material accumulated in the tideline affected the degradation of the tideline area to the same extent or more than the other areas. When the different areas of the paper sheet were sampled and aged together, it was found that the presence of the tideline clearly affected the degradation of the other paper areas. Conversely, in that case, cellulose within the tidelines was the least degraded. The area below the tideline, through which the water migrated, showed the most significant degradation.

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“…Furthermore, similar chromophore formation reactions have been associated within lignin structures after heat and light treatments (Paulsson and Ragauskas 1998). Despite the fact that lignin initiates chromophore formation, several studies have shown the beneficial effect of residual lignin in fibers on the final properties of fiber-based products (Schmidt et al 1995;Spence et al 2010;Ferrer et al 2012;Vänskä et al 2014;Rojo et al 2015;Vänskä et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Addition of Ascorbic Acid or Purified Kraft Lignin in Pulp Refining: Effects on Chemical Characteristics, Handsheet Properties, and Thermal Stability

Vänskä¹,

Vihelä²,

Johansson³

et al. 2016

BioResources

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The effects of two pulp pretreatments, impregnation with ascorbic acid (AA) or purified kraft lignin (KL), on bleached pulp refining were investigated by examining and testing handsheets made from these pulps. The AA pretreatment of the pulp amplified the depolymerization of the cellulose and notably impaired the strength properties of the pulp handsheets. The effects were enhanced upon the combination of the AA pretreatment and intensive refining. Furthermore, heat treatments (at 225 °C, 30 min, in water vapor atmospheres of 1 and 75% (v/v)) promoted the depolymerization of cellulose and the total color difference in the AA impregnated handsheets more than for the KL impregnated and reference handsheets. In contrast to AA, the KL pretreatment of the pulp improved the burst index stability of the refined pulp handsheets after the humid thermal treatment (75% (v/v)). In addition, the total color difference of the KL impregnated handsheets was lower than the AA impregnated and reference handsheets.

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Lignin inhibits autoxidative degradation of cellulose

Cited by 69 publications

References 19 publications

Characterization and aging of biotreated kraft bagasse pulp

Characterization and aging of biotreated kraft bagasse pulp

Degradation of cellulose at the wet-dry interface: I—study of the depolymerization

Addition of Ascorbic Acid or Purified Kraft Lignin in Pulp Refining: Effects on Chemical Characteristics, Handsheet Properties, and Thermal Stability

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