Cellulose consolidation under high-pressure and high-temperature uniaxial compression

Pintiaux, Thibaud; Heuls, Maelie; Vandenbossche, Virginie; Murphy, Timothy D.; Wuhrer, Richard; Castignolles, Patrice; Gaborieau, Marianne; Rouilly, Antoine

doi:10.1007/s10570-019-02273-8

Cited by 17 publications

(14 citation statements)

References 30 publications

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“…This affected the surfaces of samples prepared by SPS, which are the denser and, consequently, the more brittle part of the sample for such type of process. 7 The fourth process selected in this study used induction heating and pulsed water cooling. This technology gave access to very high heating and cooling rates and, thus, significantly reduced the manufacturing cycle times.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…5,6 The adoption of thermomechanical processes is thus almost mandatory if we want to expand the markets of biopolymerbased materials. For example, hot compression of cellulose allows to improve its mechanical properties, 7 but cellulose still retains its innate inability to melt and its water resistance typically necessitates chemical modification. 8 Historically, even when excluding the use of animal fibers in the form of textile fabrics (silk, wool, etc.…”

Section: ■ Introductionmentioning

confidence: 99%

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Melt Processing of Unrefined Horn Keratin

Jumeaux,

Touchaleaume,

Durrieu

et al. 2023

ACS Sustainable Chem. Eng.

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The hierarchical structure of keratin makes it challenging to process without chemical modification. In this work, we show that using uniaxial thermocompression of unrefined horn powder, it is possible to “mold” the keratin macromolecules and process it like a convenience polymer, by maintaining a certain moisture content and applying high pressure. The processing window was delimited by the denaturation and thermal degradation temperatures of keratin. The optimization of processing parameters, such as moisture content, temperature, pressure, and holding time, was conducted with the aim of improving the mechanical properties of the resulting materials. Alternative thermocompression processes implementing different heating and cooling techniques were also tested and compared. The most important process parameter was the efficient cooling step to keep the material under pressure along the entire temperature cycle. The material obtained through this process exhibited remarkable strength, stiffness, water resistance, and thermal stability, making it a potential substitute for synthetic thermoplastic polymers and currently available biobased materials (i.e., poly(lactic acid), cellulose acetate). The study opens new avenues for further research on other sources of scleroproteins and process optimization, offering promising prospects for the development of biopolymer-based materials with superior properties.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Melt Processing of Unrefined Horn Keratin

Jumeaux,

Touchaleaume,

Durrieu

et al. 2023

ACS Sustainable Chem. Eng.

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“…42 Both temperature and moisture are controlled external factors. In a study by Pintiaux et al 43 under subcritical water stage, the increase of moisture content and molding temperature positively affected the crystalline index of cellulose. Moreover, there is another factor that could affect crystalline cellulose in BIC, which is the reaction between cellulose and hemicellulose or lignin components within raw material.…”

Section: O-h and C-h Stretching Regionmentioning

confidence: 95%

Surface Structural Transformation of Pre-carbonized Solid Biomass from Japanese Cedar via ATR-FTIR and PCA

2019

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This present research applied the ATR-FTIR technique and principle component analysis (PCA) to investigate molecular surface changes in the pre-carbonized solid biomass, so call Kindai Bio-coke and Japanese cedar which is utilized as an alternative to coal coke in the cupola furnace of the steel industry in order to reduce the CO 2 emissions. The aim is to explore what can be the key to improve the BIC products applications from the fundamental molecular scale by using PCA to distinguish between changes during the BIC transformation and the differences in BIC samples. Results revealed that transformation occured at the surface of Japanese cedar raw materials and Japanese cedar BIC. Major changes were observed in the O-H, C-H and CO stretching regions. The intensity of the IR bands attribute to aliphatic methyl (CH 3) and methylene (CH 2) stretching modes increased while a weak O-H stretching intensity associated with BIC hydrophobic characteristic decreased.

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“…This underlying mechanism is the sintering of cellulose during the high temperature associated with pressure and moisture content. [196][197][198] Note that the moisture content of 3-30% could effectively transfer heat from surface to core area to avoid delamination, and serve as plasticizers to improve the mobility of cellulose chains.…”

Section: Hot Pressmentioning

confidence: 99%

Progress, Challenge, and Perspective of Fabricating Cellulose

Qiao

Wang

et al. 2022

Macromol. Rapid Commun.

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Cellulose as the most abundant biopolymers on Earth, presents appealing performance in mechanical properties, thermal management, and versatile functionalization. Developing fabrication methods to design functional materials and open new application areas. However, cellulose is hard to be dissolved or melt due to its recalcitrant property. Herein, the recent progress of fabricating cellulose is summarized. First, the unique hierarchical structure of cellulose is fully investigated and the resulted processability is analysed in directions of down to nanocellulose, dissolution, and thermoplastic processing. Then, the reported fabrication methods are summarized in three aspects: (1) self‐assembly from nano/micro cellulose suspensions, especially the formation of cellulose nanocrystals; (2) dissolution–regeneration–drying, covering spinning and solvent infusion processing; and (3) thermoplastic processing, focusing on the setup and the morphology changes of the prepared products. In each aspect, the flowchart of the fabrication method, the mechanism, fabricated products, and effects of processing parameters are explored. Finally, this review provides a perspective on the further direction of fabricating cellulose, especially the challenges toward mass production.

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Cellulose consolidation under high-pressure and high-temperature uniaxial compression

Cited by 17 publications

References 30 publications

Melt Processing of Unrefined Horn Keratin

Melt Processing of Unrefined Horn Keratin

Surface Structural Transformation of Pre-carbonized Solid Biomass from Japanese Cedar via ATR-FTIR and PCA

Progress, Challenge, and Perspective of Fabricating Cellulose

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