Recent trends and developments in dissolving pulp production and application

Kumar, Hemanathan; Christopher, Lew P.

doi:10.1007/s10570-017-1285-y

Cited by 105 publications

(62 citation statements)

References 145 publications

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“…These results support the findings of the ATR-IR spectroscopy for the ACCs. It has been reported that despite being natural cellulose, dissolving pulp can contain both cellulose I and cellulose II crystalline structure [41,42], which was also observed here. Presence of small amount of cellulose I in regenerated pulp might be due to the presence of minimal amount non-dissolved highly crystalline cellulose, which could not be observed with microscope (possible nanosized materials).…”

Section: Fabrication and Characterization All-cellulose Compositessupporting

confidence: 85%

Rapid preparation of all-cellulose composites by solvent welding based on the use of aqueous solvent

Sirviö

Visanko

Hildebrandt

2017

European Polymer Journal

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In the present study, the dissolution of softwood fibers and fabrication of all-cellulose composites was investigated using aqueous tetraethylammonium hydroxide solution (TEAOH, 35 wt%) at room temperature. The bulk of the cellulose fibers were instantly dissolved when mixed with the solvent, and suspensions up to 3wt% were fabricated with ease. During the dissolution, a few remaining larger fiber flocks were fully dissolved within 3 h of mixing at room temperature. TEAOH was further studied in the production of all-cellulose composites by solvent welding (partial dissolution) of cellulose fiber sheets. Tensile strength of the original cellulose sheet increased from 3.3 to 55.0 MPa only after 30 s of room-temperature solvent welding, and an increase of over 23-fold (up to 76.7 MPa) was obtained by high-pressure-aided hot-pressing of the partially dissolved sheets before drying. The demonstrated fabrication of allcellulose composites yielded many benefits in comparison to the current dissolution systems,

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Section: Fabrication and Characterization All-cellulose Compositessupporting

confidence: 85%

Rapid preparation of all-cellulose composites by solvent welding based on the use of aqueous solvent

Sirviö

Visanko

Hildebrandt

2017

European Polymer Journal

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“…About 90% of global dissolving pulp production is isolated from wood pulp, and only about 10% comes from cotton linters (Kumar and Christopher 2017). Dissolving pulp from wood is produced chemically by the acid sulfite (AS) process or the prehydrolysis kraft (PHK) process (Duan et al 2015).…”

Section: Dissolving Pulpmentioning

confidence: 99%

“…Regenerated cellulose is prepared from dissolving pulp, which consists of highpurity cellulose (90 to 99%), by dissolution and then coagulation processes (Kumar and Christopher 2017). The process of cellulose regeneration, accompanying physical change and chemical reaction, not only provides the unsurpassed physical and chemical properties but maintains inherent renewability, biocompatibility, biodegradability, and environmental friendliness of cellulose.…”

Section: Regenerated Cellulose Filmsmentioning

confidence: 99%

Prospects for Replacement of Some Plastics in Packaging with Lignocellulose Materials: A Brief Review

Su¹,

Yang

Liu³

et al. 2018

BioResources

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There has been increasing concern regarding environmental problems arising from the widespread use of petroleum-based plastic materials for packaging. Many efforts have been made to develop sustainable and biodegradable packaging materials to replace plastic products. The current review summarizes recent research progress in developing cellulose packaging materials to replace plastics used for cushioning and barrier packaging functions based on pulp fibers, cellulose nanofibers, and regenerated cellulose films to benefit from their renewability, sustainability and biodegradability. The cushioning packaging materials include molded pulp products and bio-based foams. Advanced cellulose films and paper can be good barriers for oxygen and carbon dioxide gases, as well as for water vapor. Several cellulose fiber-based packaging products have been commercialized in areas that used to be occupied solely by plastic products.

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“…To make viscose fibres, wood chips are initially converted to "brown-stock" pulp using either the kraft or the sulphite process that remove a high amount of non-cellulosic wood constituents such as hemicellulose and lignin. Subsequently, the pulp is further purified by a suitable sequence of bleaching stages to the dissolving pulp quality required by the respective fibre process [3,4]. Dissolving pulp is a type of pulp having a high cellulose content (>90%), high purity, brightness, cellulose reactivity, and a uniform molecular weight distribution [3].…”

Section: Introductionmentioning

confidence: 99%

“…Subsequently, the pulp is further purified by a suitable sequence of bleaching stages to the dissolving pulp quality required by the respective fibre process [3,4]. Dissolving pulp is a type of pulp having a high cellulose content (>90%), high purity, brightness, cellulose reactivity, and a uniform molecular weight distribution [3].…”

Section: Introductionmentioning

confidence: 99%

Effects of Caustic Extraction on Properties of Viscose Grade Dissolving Pulp

et al. 2019

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Viscose, a cellulose-based commodity fibre, is produced by pulping and bleaching of wood, yielding a high quality “dissolving pulp” which is then spun. During pulping and bleaching, effective hemicellulose extraction is required to allow fibre production. We present a design of experiments (DoE) approach to optimise caustic extraction in a total chlorine free (TCF) bleaching sequence (O-CE-Z-P) of beech wood sulphite pulp. Temperature and sodium hydroxide concentration were varied to identify highest xylan extraction yield, and a maximum xylan removal of 83% was achieved at 20 °C and 120 g/L NaOH. Additionally, caustic extraction conditions were derived from the DoE model that led to pulps with high yield, high alpha cellulose content or uniform cellulose molecular weight distribution. Pulps from verification experiments exhibited good reactivity in viscose application tests. Hence, the presented O-CE-Z-P bleaching sequence can be considered as suitable for integrated viscose fibre production. We assume that the presented caustic extraction model will be useful for pulp and biorefinery researchers who work on caustic biorefinery processes involving hardwood feedstocks.

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Recent trends and developments in dissolving pulp production and application

Cited by 105 publications

References 145 publications

Rapid preparation of all-cellulose composites by solvent welding based on the use of aqueous solvent

Rapid preparation of all-cellulose composites by solvent welding based on the use of aqueous solvent

Prospects for Replacement of Some Plastics in Packaging with Lignocellulose Materials: A Brief Review

Effects of Caustic Extraction on Properties of Viscose Grade Dissolving Pulp

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