Thermoplastic translucent film from wood and fatty acids by solvent free esterification: Influence of fatty acid chain length

Sejati, Prabu Satria; Akong, Firmin Obounou; Torloting, Camile; Fradet, Frédéric; Gérardin, Philippe

doi:10.1016/j.eurpolymj.2023.112276

Cited by 6 publications

(8 citation statements)

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“…Glass transition temperature observations were reported in the same range of temperature, corresponding to the reorganization of the fatty acid chain and cellulose backbone in oleic-acid-esterified cellulose [26]. The third deformation was observed between 245 and 257 °C for C16 and C10, respectively, which was associated with the onset of decomposition of the wood component [21].…”

Section: Application Of Esterified Wood As New Bioplasticmentioning

confidence: 65%

“…As the length of the fatty chain increases, the first deformations were observed at 196, 72, and 56 °C for C3, C10, and C16, respectively. This softening temperature indicated the loss of film rigidity related to the fatty chain grafted to the wood [20,21]. The second deformation was observed between temperatures of 171 and 266 °C.…”

Section: Application Of Esterified Wood As New Bioplasticmentioning

confidence: 95%

“…The sample was then dried at 103 • C for 24 h to obtain the final mass (m1). The weight percent gain (WPG) was calculated as follows using Equation (1) [21]:…”

Section: Wood Esterificationmentioning

confidence: 99%

“…The ester content (in mmol of ester per gram of wood) was calculated from the mass of reactant grafted on the wood per gram of wood divided by the molecular mass of fatty acid used for esterification (M) minus 18, which corresponded to the molecular mass of water released during esterification, using Equation (2) [21]:…”

Section: Wood Esterificationmentioning

confidence: 99%

“…Our previous study successfully converted wood into thermoplastic materials using myristic acid as an esterifying agent and TFAA as a promoter [20]. The influence of fatty acid chain lengths on esterified sample properties was also investigated [21]. It is important to study the reactivity of several fatty acids of differing chain lengths under various reaction conditions to provide an overview of the optimum and efficient conditions that may, ultimately, be used in industry.…”

Section: Introductionmentioning

confidence: 99%

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Wood Esterification by Fatty Acids Using Trifluoroacetic Anhydride as an Impelling Agent and Its Application for the Synthesis of a New Bioplastic

Sejati,

Obounou Akong,

Fradet

et al. 2023

Materials

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Fatty acids (FA) and their derivatives with long alkyl chain structures are good candidates for wood esterification to confer thermoplastic properties to wood. Nevertheless, they do not react easily with hydroxyl groups of wood. In this study, we investigated the reactivity of wood with various fatty acids of different chain lengths using trifluoroacetic anhydride (TFAA) as the impelling agent in various reaction conditions. Generally, the esterification of fatty acids without solvents resulted in higher Weight Percentage Gain (WPG) and ester content than the reaction in the presence of CH2Cl2. The esterification reaction could be performed effectively at room temperature, though an increased reaction temperature provoked degradation of the esterified wood. WPG of 67% was obtained for the C3 and 253% for the C16 alkyl chain analogs, respectively. Nevertheless, the ester content was fairly uniform, with values between 10.60 and 11.81 mmol ester/gram of wood for all chain lengths. A higher quantity of reagent led to higher ester content, which tended to stabilize after a ratio of 1:4 wood and TFAA/FA. The esterification reaction was performed rapidly, with an ester content between 7.65 and 9.94 mmol ester/gram of wood being achieved only after 15 min of reaction. Fourier transform infrared spectroscopy (FTIR) analysis was performed to confirm the drastic chemical changes of wood before and after esterification. Morphological observation by scanning electron microscope (SEM), softening measurement by thermomechanical analysis (TMA), and contact angle measurements demonstrated the possibility of esterified spruce wood being applied as a new bioplastic.

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Section: Application Of Esterified Wood As New Bioplasticmentioning

confidence: 65%

Section: Application Of Esterified Wood As New Bioplasticmentioning

confidence: 95%

“…The sample was then dried at 103 • C for 24 h to obtain the final mass (m1). The weight percent gain (WPG) was calculated as follows using Equation (1) [21]:…”

Section: Wood Esterificationmentioning

confidence: 99%

Section: Wood Esterificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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