Analysis of lignin precipitates on ozone treated kraft pulp by FTIR and AFM

Gilli, Eduard; Schmied, Franz; Diebald, Stefan; Horvath, Andrew T.; Teichert, Christian; Schennach, Robert

doi:10.1007/s10570-011-9612-1

Cited by 17 publications

(14 citation statements)

References 19 publications

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“…Investigation of single fibers with a j-number of 8 revealed already 16 recognized precipitates (Gilli et al 2011). Still, there are some limitations.…”

Section: Discussionmentioning

confidence: 99%

“…To obtain pulp with very low lignin content on the surface, the industrial pulp was ozone-bleached to a j-number of 6. A detailed description of this procedure is found in Gilli et al (2011).…”

Section: Methodsmentioning

confidence: 99%

“…Also fundamental studies on the kinetics and structure of ligning precipitates have been conducted (Norgren et al 2002;Petridis et al 2011). Numerous nanometer scale investigations of pulp fiber surfaces with different techniques, like confocal Raman spectroscopy (Ö sterberg et al 2006), electron spectroscopy for chemical analysis (ESCA) (Koljonen et al 2003), or time-of-flight secondary ion mass spectroscopy (ToF-SIMS) (Fardim et al 2005) in combination with atomic force microscopy (AFM) (Pereira et al 1999;Chhabra et al 2005;Hanley 1999;Niemi et al 2002;Simola et al 2000;Simola-Gustaffson et al 2001;Yu et al 2008;Gilli et al 2011) investigations have been applied successfully on cellulose fiber surfaces.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of precipitated lignin on kraft pulp fibers using atomic force microscopy

et al. 2012

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A method is presented which enables analysis of lignin precipitated on the surface of kraft pulp fibers. As experimental input, high-resolution atomic force microscopy phase images of the fiber surfaces have been recorded in tapping mode. A digital image analysis procedure-based on the watershed algorithm-is applied to distinguish between cellulose fibrils and the precipitated lignin. In this way, size distributions for the diameter of lignin precipitates on pulp fiber surfaces can be obtained. In an initial application of the method, three softwood kraft pulps were analyzed: a black liquor cook with a very high content of precipitated lignin, a bleached pulp where nearly no precipitated lignin is visible and an unbleached industrial pulp. The proposed method is suggested as an appropriate tool to investigate the kinetics of lignin precipitation and the structure of lignin precipitates in pulping and bleaching.

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“…Investigation of single fibers with a j-number of 8 revealed already 16 recognized precipitates (Gilli et al 2011). Still, there are some limitations.…”

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of precipitated lignin on kraft pulp fibers using atomic force microscopy

et al. 2012

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“…This improved fibrillation can be explained by the decreased lignin composition and increased negative surface charge on the fibers. The ozone-induced delignification occurred via an electrophilic substitution reaction on the lignin units or [26,27]. Free radical reactions induced by the decomposition of ozone and lignin self-ozonation could also contribute to the improved delignification.…”

Section: Preparation Of the Substrate For Nfc Production Viamentioning

confidence: 99%

Ozone Oxidation of Kraft Bamboo Pulp for Preparation of Nanofibrillated Cellulose

Liu

Chen

Tian

2018

International Journal of Polymer Science

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The influence of ozonation on the homogenization of Kraft bamboo pulp (KBP) for the production of nanofibrillated cellulose (NFC) was studied. Using optimized conditions for ozonation, that is, pulp consistency 35%, ozone dosage 0.87% (v/w), and pH = 2 5, the kappa number and viscosity of KBP decreased from 10.8 to 2.8 and from 1024 mL•g −1 to 258 mL•g −1 , respectively, while the crystallinity and carboxylate content increased from 36.2% to 48% and 0.93 mmol/g to 1.26 mmol/g, respectively. The ozonation-treated KPB was used as the substrate for NFC preparation through homogenization. With a width of 10-20 nm and length ≥ 250 nm, the prepared NFC had a high aspect ratio of length versus width. Ozonation can be used as an alternative approach to promote the efficient production of NFC from KBP.

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“…Therefore, the ozone dosage should be controlled. On the other hand, when the lignin content of pulps is relatively high, ozone could selectively react with the lignin while the carbohydrates are well-protected [20,21]. Reactions between ozone and lignin are complex; ozone can react with almost all functional groups in lignin [18], including reacting with double bonds in the side chain, destroying the aromatic rings and forming carbonyl groups and peroxides [22].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ozone Treatment on the Properties of Oil Palm Empty Fruit Bunch Sulfonated Chemi-Mechanical Pulp

Wan

Yang

2021

Forests

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Oil palm empty fruit bunch (EFB) as an abundant waste material can be utilized for pulp production to alleviate the shortage of raw materials in the paper industry. Sulfonated chemi-mechanical pulp (SCMP) has great potential in paper making industry. However, its poor performance due to the high surface lignin content limits its application. In this study, we used EFB as raw material to produce SCMP and systematically studied the effect of ozone treatment on pulp properties. Results show that the surface structure and morphology of fibers exhibited distinct differences under different ozone dosage treatments. Compared to the control, the content of surface lignin of pulps was reduced by 2.56%, 4.64%, 13.24% and 25.24% when ozone consumption was 1, 3, 5 and 7 wt%, respectively. Meanwhile, the treated pulp had a lower drainability at the same refining energy level. Moreover, the physical and optical properties of handsheets were improved significantly after ozone treatment. Ozone treatment is a very efficient way to improve the performance of SCMP. Additionally, this method avoids complicated processes and chemical consumption. Therefore, as an effective, environmentally friendly and low-cost treatment method, ozone treatment can improve the performance of EFB SCMP and thus provide a high-quality pulp resource.

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Analysis of lignin precipitates on ozone treated kraft pulp by FTIR and AFM

Cited by 17 publications

References 19 publications

Analysis of precipitated lignin on kraft pulp fibers using atomic force microscopy

Analysis of precipitated lignin on kraft pulp fibers using atomic force microscopy

Ozone Oxidation of Kraft Bamboo Pulp for Preparation of Nanofibrillated Cellulose

Effect of Ozone Treatment on the Properties of Oil Palm Empty Fruit Bunch Sulfonated Chemi-Mechanical Pulp

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