Hydrophobic Cellulose-based Materials Obtained by Uniaxial High Pressure Compression: In-situ Esterification with Fatty Acids and Fatty Anhydrides

Pintiaux, Thibaud; Laourine, Feriel; Vaca-Medina, Guadalupe; Rouilly, Antoine; Peydecastaing, Jérôme

doi:10.15376/biores.10.3.4626-4640

Cited by 16 publications

(10 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Cohesive lignocellulosic materials can be produced without using binders or any chemical agents. Several self-bonding mechanisms of binderless lignocellulosic materials have been proposed as a consolidation mechanism [9], such as lignin-carbohydrate complex (LCC) crosslinking, hydrogen bonding and cellulose co-crystallization. Self-bonding of this kind of material is mainly attributed to the presence of lignin which is considered to be partially responsible for material adhesion [10].…”

Section: Introductionmentioning

confidence: 99%

Influence of Thermocompression Conditions on the Properties and Chemical Composition of Bio-Based Materials Derived from Lignocellulosic Biomass

Cavailles,

Vaca-Medina,

Wu-Tiu-Yen

et al. 2024

Preprint

View full text Add to dashboard Cite

The aim of this study was to assess the influence of thermocompression conditions on lignocellulosic biomass such as sugarcane bagasse (SCB) in the production of 100% binderless bio-based materials. Five parameters were investigated: pressure applied (7-102 MPa), molding temperature (60-240°C), molding time (5-30 min), fiber/fine particle ratio (0/100-100/0) and moisture content (0-20%). These parameters affected the properties and chemical composition of the materials. The density ranged from 1198 to 1507 kg/m3, the flexural modulus from 0.9 to 6.9 GPa and the flexural strength at breaking point from 6.1 to 43.6 MPa. Water absorption (WA) and thickness swelling (TS) respectively ranged from 21% to 240% and from 9% to 208%. Higher mechanical properties were obtained using SCB with fine particles, low moisture content (4-10%), high temperature (≥ 200°C) and pressure (≥ 68 MPa), while water resistance was improved using more severe thermocompression conditions with the highest temperature (240°C) and time (30 min) or a higher moisture content (≥ 12.5%). Correlations were noted between the mechanical properties and density, while the material obtained with only fine particles had the highest mechanical properties and density. Material obtained with a 30 min molding time had the lowest WA and TS due to internal chemical reorganization followed by hemicellulose hydrolysis into water-soluble extractables.

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of Thermocompression Conditions on the Properties and Chemical Composition of Bio-Based Materials Derived from Lignocellulosic Biomass

Cavailles,

Vaca-Medina,

Wu-Tiu-Yen

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…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. ), the use of proteins in materials has a long tradition.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Other carbohydrates (alginates, cellulose, chitosan) are also commonly used but their processing is primarily confined to “wet” procedures involving dispersion or dissolution and the resulting materials are still too water sensitive for food contact applications. , The adoption of thermomechanical processes is thus almost mandatory if we want to expand the markets of biopolymer-based materials. For example, hot compression of cellulose allows to improve its mechanical properties, but cellulose still retains its innate inability to melt and its water resistance typically necessitates chemical modification …”

Section: Introductionmentioning

confidence: 99%

Melt Processing of Unrefined Horn Keratin

Jumeaux,

Touchaleaume,

Durrieu

et al. 2023

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

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.

show abstract

“…above 140°C) might then work as a natural binder. Binderless board production has in fact been generally performed at temperatures between 180 and 260°C (Pintiaux et al 2015) often in combination with relatively long pressing factors (60-300 s mm −1 ) and high pressures (5-12 MPa).…”

Section: Introductionmentioning

confidence: 99%

“…The self-cohesion process has been related to different and interdependent mechanisms, such as the softening and flowing of cell-wall polymers like lignin as they go beyond the glass transition temperature, and the thermal degradation of wood constituents to reactive volatiles (e.g. aldehydes) which are able to cross-link lignin and other phenolics extractives (Pintiaux et al 2015). In the case of coconut husk, which is very rich in syringyl lignin, it was shown that upon heating, the material showed a typical exotherm around 140°C which disappears in a second heating cycle (van Dam, van den Oever, Teunissen, et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Binderless boards made of milled coconut husk: an analysis of the technical feasibility and process restraints

Böger

Bianchi

Salzer

et al. 2017

International Wood Products Journal

View full text Add to dashboard Cite

The possibility of producing binderless panels made of milled coconut husk, a largely available by-product of the coconut oil industry, has been shown in previous researches. Long pressing times and a high risk of blisters have however hindered the industrial implementation of the process. In this study, a more energy-efficient manufacturing process, involving a tailored degassing step, was developed on a laboratory scale and then validated at an industrial size (2 × 1 m 2 ). To achieve mechanical properties close to the European and Japanese standards for fibreboards and to avoid the delamination of the boards, final densities between 900 and 1000 kg m −3 had to be targeted. Similarly, a successful board production was only possible if the moisture content of the husk was between 10 and 25%. The need for a suitable matforming technology to avoid the risk of warping of the panel was highlighted.

show abstract

Hydrophobic Cellulose-based Materials Obtained by Uniaxial High Pressure Compression: In-situ Esterification with Fatty Acids and Fatty Anhydrides

Cited by 16 publications

References 3 publications

Influence of Thermocompression Conditions on the Properties and Chemical Composition of Bio-Based Materials Derived from Lignocellulosic Biomass

Influence of Thermocompression Conditions on the Properties and Chemical Composition of Bio-Based Materials Derived from Lignocellulosic Biomass

Melt Processing of Unrefined Horn Keratin

Binderless boards made of milled coconut husk: an analysis of the technical feasibility and process restraints

Contact Info

Product

Resources

About