Initial wet web strength of paper

Belle, Jürgen; Odermatt, Jürgen

doi:10.1007/s10570-016-0961-7

Cited by 38 publications

(20 citation statements)

References 76 publications

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“…The cellulose molecule has numerous hydroxyl groups, which have a strong tendency toward hydrogen bonding with hydroxyl of adjacent molecules [24]. This tendency in connection with the molecular structure is responsible for increasing fiber-to-fiber bonding in final paper [25,26]. The free hydroxyl groups of cellulose have a strong affinity for polar solvents and solutes that can reach them.…”

Section: Chemical Compositionsmentioning

confidence: 99%

Alkaline Sulfite Anthraquinone and Methanol (ASAM) Pulping Process of Tropical Bamboo (Gigantochloa scortechinii)

Paridah¹,

Moradbak²,

Mohamed³

et al. 2018

Bamboo - Current and Future Prospects

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This chapter explores the characteristic potentials of alkaline sulfite anthraquinone and methanol (ASAM) pulping of bamboo culms (Gigantochloa scortechinii) in the industrial production of pulp and paper for packaging. The biometric characterization results of the bamboo culms show that bamboo has fiber length of 1980-4000 μm, Runkel ratio of 0.86, and flexibility ratio of 50.19, while the chemical compositions of the bamboo contain 47.67% cellulose, 68.33% holocellulose, 26% lignin, and 3.69% solvent extractive, which give good paper quality fiber and also falls within the range of wood from softwoods species. The study revealed that the optimum ASAM pulping parameters was at 16% NaOH and 90 min cooking time, resulting in Kappa number of 14.17 and pulp yield of 49.06%, while the paper tensile index of 20.86 Nm/g, tear index of 22.64 mN.m2/g, and brightness of 39.32% were obtained. The biometric and chemical characterizations of the ASAM pulped bamboo have shown that ASAM pulped bamboo produces high-quality pulp and paper suitable for packaging and printing paper. Hence, the use of bamboo materials can reduce the burden on the forest, due to the increasing demand for paper and paper products, while supporting the natural biodiversity.

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Section: Chemical Compositionsmentioning

confidence: 99%

Alkaline Sulfite Anthraquinone and Methanol (ASAM) Pulping Process of Tropical Bamboo (Gigantochloa scortechinii)

Paridah¹,

Moradbak²,

Mohamed³

et al. 2018

Bamboo - Current and Future Prospects

View full text Add to dashboard Cite

show abstract

“…The uncollapsed fibers will create a network with higher porosity and higher bulk compared with the collapsed ones. [ 44 ] Thus, fibers produced in kraft will form stronger sheets and possess better tensile properties. [ 45 ] However, fiber curliness negatively affects tensile and tensile stiffness indices, while it increases tear and fracture toughness indices.…”

Section: Resultsmentioning

confidence: 99%

“…[ 50 ] The presence of greater numbers of carboxyl groups and surface charge in the fiber facilitates better entanglement by inducing hydrogen bonding to increase the tensile and burst properties of the fibers. [ 44,51 ] The carboxyl groups act as binding sites and also enables controlled chemical loading and release by regulating the interactions between the carboxyl group and chemicals. [ 34,35 ] Thus, tissue, towels and wipes with varying surface charge and carboxyl content can be produced by using different fiber types or pulping (Figure 4).…”

Section: Resultsmentioning

confidence: 99%

“…[ 37 ] It is an important parameter as it affects the different properties of the paper products like water absorption, tensile, drying energy, and the reactivity cellulose towards chemicals. [ 37,44,56 ] Thus, the effect of the different pulping processes on the HR water content of the different feedstocks were investigated graphically represented in Figure .…”

Section: Resultsmentioning

confidence: 99%

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Lignocellulosic Fibers from Renewable Resources Using Green Chemistry for a Circular Economy

et al. 2020

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The sustainable development of lignocellulose fibers exhibits significant potential to supplant synthetic polymer feedstocks and offers a global platform for generating sustainable packaging, bioplastics, sanitary towels, wipes, and related products. The current research explores the dynamics of fiber production from wood, non‐wood, and agro‐residues using carbonate hydrolysis and a mild kraft process without bleaching agents. With respect to carbonate hydrolysis, high yield, and good coarseness fibers are attained using a simple, low‐cost, and ecofriendly process. Fibers produced using a mild kraft process have lower Klason lignin, carboxyl content, surface charges, and higher fiber length, and crystallinity. Eucalyptus fibers show the highest crystallinity while softwood carbonate fibers show the lowest crystallinity. Hemp hurd fibers contain the highest concentration of hard‐to‐remove water, and thus, suffer maximum flattening visualized by the microscopic images. The relatively high yield sustainable fibers with versatile properties can provide a significant economic benefit since fiber is the dominant cost for producing various bioproducts to meet society's current and future needs.

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“…Tejado and van de Ven [69], in their analysis on paper strength, highlight the importance of fiber entanglement friction to hold fibers together in a wet web, which is gradually strengthened by hydrogen bonds forming as the capillary forces induce fibers into contact. Belle and Odermatt [4], reviewing the literature as far as the strength of wet webs is concerned, identified the interplay of factors such as Van der Waals forces, electrostatic forces, capillary forces, and internal hydrogen bonds formation, together with fibers morphology, the surface roughness of fibers, amount of fibrils and fines.…”

Section: Materials Propertiesmentioning

confidence: 99%

Micro-mechanical modeling of the paper compaction process

et al. 2021

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Double-roll compaction is a process to create extensible paper and paperboard suitable for replacing plastic in 3D forming applications. Understanding the macro- and micro-mechanisms governing the compaction process allows increasing the stretch potential while maintaining sufficient strength and bending stiffness. In this work, we approach the compaction process of paperboard with micro-mechanical methods featuring the unprecedented level of details otherwise inaccessible with currently available experimental tools. The loading scheme is based on experiments and continuum level simulations. The different levels of compaction and their continuous impact on the fibers’ geometry, void closures, and irreversible deformation of the fibers are thoroughly characterized. We find that the structural changes are concentrated in the fibers oriented within 30 degrees of the direction of compaction. The deformation accumulates primarily in the wall of the fibers in the form of irreversible strains. The spring-back effect beyond the compaction is negligible. For the first time, the role of normal and frictional fiber-to-fiber interactions in the compaction process is investigated and quantified. The frictional interaction between the fibers has a surprisingly low impact on the outcome of the compaction process, and the normal interaction between the fibers has a dominant response. The consequence of this finding is potentially limited impact of the surface modifications targeting the friction.

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Initial wet web strength of paper

Cited by 38 publications

References 76 publications

Alkaline Sulfite Anthraquinone and Methanol (ASAM) Pulping Process of Tropical Bamboo (Gigantochloa scortechinii)

Alkaline Sulfite Anthraquinone and Methanol (ASAM) Pulping Process of Tropical Bamboo (Gigantochloa scortechinii)

Lignocellulosic Fibers from Renewable Resources Using Green Chemistry for a Circular Economy

Micro-mechanical modeling of the paper compaction process

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