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<p>This study investigated ultrasound-assisted extraction of cellulosic fiber from red pepper and tomato by-product using water and 80% ethanol. The extraction was performed for 2&#xa0;h at 20&#xa0;kHz. The aim was to compare the effects of each treatment on fiber yield, structural characteristics, and potential applications. Total fiber yields ranged from 30.01 ± 0.73% to 44.64 ± 1.3%. Fourier-transform infrared (FTIR) spectroscopy confirmed that the extracted fibers were rich in cellulose and that the chemical structures remained largely intact under the tested conditions. Scanning electron microscopy (SEM) revealed organized fibrous microstructures. Thermogravimetric analysis (TGA) demonstrated that all samples underwent thermal degradation in three stages within similar temperature ranges. Dynamic vapor sorption (DVS) analysis indicated that fibers extracted with ethanol from red pepper by-products exhibited higher water vapor adsorption compared to those extracted with water. Both extraction protocols were effective for recovering fibers from cannig industry by-products. Additionally, the extracted fibers were used to produce fiberboards through thermo-pressing without the use of chemical binders. The resulting fiberboards were cohesive and exhibited good mechanical properties. Indeed, the breaking force (F) of manufactured fiberboards was ranged from 1.58 ± 0.33&#xa0;MPa to 5.78 ± 0.92&#xa0;MPa. The raw materials boards were the most resistant and the red pepper based fiberboards were more resistant than the other fiberboards. These results supported the potential application of this valorization in agro-plastic and related fields.</p>

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Ultrasound Assisted Eco-Friendly Fiber Extraction from Tunisian Red Pepper and Tomato by-Products and Manufacturing of Biodegradable Fiberboards

  • 期刊论文

  • 发表日期：

    2025年8月22日

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  • Marwa Cheikh Rouhou,
  • Souhir Abdelmoumen,
  • William Tapia,
  • Guadalupe Vaca-Medina,
  • Christine Raynaud,
  • Hamadi Attia,
  • Dorra Ghorbel

摘要

This study investigated ultrasound-assisted extraction of cellulosic fiber from red pepper and tomato by-product using water and 80% ethanol. The extraction was performed for 2 h at 20 kHz. The aim was to compare the effects of each treatment on fiber yield, structural characteristics, and potential applications. Total fiber yields ranged from 30.01 ± 0.73% to 44.64 ± 1.3%. Fourier-transform infrared (FTIR) spectroscopy confirmed that the extracted fibers were rich in cellulose and that the chemical structures remained largely intact under the tested conditions. Scanning electron microscopy (SEM) revealed organized fibrous microstructures. Thermogravimetric analysis (TGA) demonstrated that all samples underwent thermal degradation in three stages within similar temperature ranges. Dynamic vapor sorption (DVS) analysis indicated that fibers extracted with ethanol from red pepper by-products exhibited higher water vapor adsorption compared to those extracted with water. Both extraction protocols were effective for recovering fibers from cannig industry by-products. Additionally, the extracted fibers were used to produce fiberboards through thermo-pressing without the use of chemical binders. The resulting fiberboards were cohesive and exhibited good mechanical properties. Indeed, the breaking force (F) of manufactured fiberboards was ranged from 1.58 ± 0.33 MPa to 5.78 ± 0.92 MPa. The raw materials boards were the most resistant and the red pepper based fiberboards were more resistant than the other fiberboards. These results supported the potential application of this valorization in agro-plastic and related fields.