Structure and performance control of plant fiber based foam material by fibrillation via refining treatment

Li, Jinbao; Xue, Yongjie; Xiu, Huijuan; Dong, Hao; Song, Te; Ma, Feiyan; Pan, Feng; Zhang, Xuefei; Kozliak, Evguenii; Yun, Jimmy

doi:10.1016/j.indcrop.2018.10.085

Cited by 39 publications

(18 citation statements)

References 24 publications

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“…In general, the three main effects of beating/refining are as follows: (1) internal fibrillation increases the flexibility of fibres by the breakdown of fibre walls into separate lamellae, (2) external fibrillation is described as the creation and/or exposure of fibrils on the surface of the fibres, and (3) the generation of fines from fibres when they are no longer able to sustain compressive and/or shear forces during the treatment [122]. According to Li et al [123], an optimum degree of beating at 60°SR (degree of beating) leads to higher porosity and a greater extent of fibrillation. e PF fibrillation degree obtained from the beating process enables the control of the microstructure and mechanical properties of PF [124].…”

Section: Electric Dischargementioning

confidence: 99%

Physical and Chemical Modifications of Plant Fibres for Reinforcement in Cementitious Composites

Ahmad

Hamid

Osman

2019

Advances in Civil Engineering

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This paper highlights the physical and chemical surface modifications of plant fibre (PF) for attaining suitable properties as reinforcements in cementitious composites. Untreated PF faces insufficient adhesion between the fibres and matrix due to high levels of moisture absorption and poor wettability. These conditions accelerate degradation of the fibre in the composite. It is also essential to reduce the risk of hydrophilic PF conditions with surface modification, to enhance the mechanical properties of the fibres. Fibres that undergo chemical and physical modifications had been proven to exhibit improved fibre-matrix interfacial adhesion in the composite and contribute to better composite mechanical properties. This paper also gives some recommendations for future research on chemical and physical modifications of PF.

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Section: Electric Dischargementioning

confidence: 99%

Physical and Chemical Modifications of Plant Fibres for Reinforcement in Cementitious Composites

Ahmad

Hamid

Osman

2019

Advances in Civil Engineering

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“…The strength of foam-formed network structures can be improved by using polymeric foaming agents such as PVA or adding nanocellulose or lignocellulosic fines in the furnish. [77,[138][139][140] However, the strengthening mechanisms can be different in these two cases. PVA acts as a cross linker for inter-fiber bonds but can also open larger voids in the microporous structure and at the same time densify certain local network regions.…”

Section: Compression Behaviormentioning

confidence: 99%

Foam forming of fiber products: a review

Hjelt

Ketoja

Kiiskinen

et al. 2021

Journal of Dispersion Science and Technology

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Aqueous foam can be used as a transfer medium to form lightweight materials from natural and man-made fibers together with other types of raw materials. This review discusses mechanisms that underlie the forming process and thus influence physical properties of formed fiber networks such as microporous structure, strength behavior, and transport properties. Homogeneous fiber materials can be formed from versatile raw materials, which makes the technology suitable for a vast range of product applications. An intriguing feature of the method is that the wet foam characteristics provide an additional tool to tailor the performance of the dried material. Understanding foam rheology and how that is affected by added fibers is important in developing the forming process. We introduce both fundamental foam properties and practical forming methods, and show how the material properties are affected by the foam-fiber interaction. The basic features of an industrial production process are also described. The potential material properties are compared against key requirements in typical product applications.

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“…The increase in viscosity of the EHEC-MFC foams was attributed to the smaller air bubbles in the foam and the increased solids content, especially with the highly viscous MFC. Weak hydrogen bonding between the fibrils results in a less stable foam and also affects the viscosity of the foam (Li et al 2019).…”

Section: Foam Formation and Stabilitymentioning

confidence: 99%

Film formation and foamability of cellulose derivatives: Influence of co-binders and substrate properties on coating holdout

Lyytikäinen

Ovaska

Heiskanen

et al. 2020

BioRes

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Foams were prepared from hydrophobically modified ethyl(hydroxyethyl) cellulose (EHEC), methyl nanocellulose, and native microfibrillated cellulose (MFC). Their film- and foam-forming abilities, stabilities, and suitabilities for foam coating on different substrates were investigated. The role of EHEC as a polymeric stabilizing agent was also studied. The EHEC-MFC foams showed greater stability and water-holding ability under pressurized dewatering than MFC foams prepared in the presence of a surfactant. A foam could be created with methyl nanocellulose without any foaming agent. Selected nanocellulose gels and foam formulations were used to coat various substrates. The surface was efficiently closed by gel and foam coatings prepared from the methyl nanocellulose and EHEC solutions, which was ascribed to good coating holdout. Coatings on papers with different levels of smoothness/density and hydrophobicity/ hydrophilicity confirmed that foam-substrate interactions affected the coat quality. The air permeance was reduced by 99% and 64% with a methyl nanocellulose coating and an EHEC-MFC coating, respectively. An EHEC-MFC coating created a hydrophobic surface on a hydrophilic substrate, and methyl nanocellulose improved the oil resistance even at a low coat weight.

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Structure and performance control of plant fiber based foam material by fibrillation via refining treatment

Cited by 39 publications

References 24 publications

Physical and Chemical Modifications of Plant Fibres for Reinforcement in Cementitious Composites

Physical and Chemical Modifications of Plant Fibres for Reinforcement in Cementitious Composites

Foam forming of fiber products: a review

Film formation and foamability of cellulose derivatives: Influence of co-binders and substrate properties on coating holdout

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