Defibrillated celluloses via dual twin-screw extrusion and microwave hydrothermal treatment (MHT) of spent pea biomass

Yang Gao, Hao Xia, Allyn P. Sulaeman, Eduardo M. De Melo, Tom I.J. Dugmore, Avtar S. Matharu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The defibrillation of lignocellulosic matter from pea waste using a dual approach of twin-screw extrusion and microwave hydrothermal treatment (MHT) in the presence of water alone from 120 to 200 °C is reported. Gradual "scissoring" of biomass macrofibers to microfibrils was observed alluding to the hydrothermal microwave-assisted selective scissoring (Hy-MASS) concept. The morphology and properties of two types of MFC: PEA (nonextruded) and EPEA (extruded) were compared. The EPEA samples gave a higher crystallinity index and thermal stability, reduced lignin and hemicellulose content, narrower fibril width, better water holding capacity slightly, and higher surface area compared with their nonextruded counterparts (PEA). Twin screw extrusion as a pretreatment method followed by MHT represents a potential way to produce microfibrillated cellulose with improved physical performance from complex biomass sources.

Original languageEnglish
JournalACS Sustainable Chemistry & Engineering
Early online date6 Jun 2019
Publication statusPublished - 6 Jun 2019

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© 2019 American Chemical Society. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.


  • Hydrothermal microwave treatment
  • Microfibrillated cellulose
  • Spent pea biomass (haulm)
  • Twin-screw extrusion

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