.png){kind=icon}
.png){kind=icon}
Return
Fully green and scalable solvent-free functionalization of banana waste fibers for high-performance biodegradable thermoplastic starch/DES composites
.png){kind=icon}
PRE
AI
C
T
V
T
D
DOI：10.1080/09276440.2026.2634491.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Sustainable packaging requires starch-based biocomposites that combine low-impact processing with effective lignocellulosic reinforcement. Here, banana pseudostem fibers (PBF) were upgraded through a solvent-minimized sequence and used to reinforce deep-eutectic-plasticized thermoplastic starch (TPS). A one-step peracetic acid (PAA) treatment reduced lignin and hemicellulose and improved fiber structure, increasing cellulose content from 23% to 64%, crystallinity from 51% to 67%, and thermal onset from 110 to 260 degrees C. The bleached fibers were then functionalized via solvent-free citric esterification, providing the highest carboxyl density among the routes examined (-COOH similar to 3.28 mmol g(-1)) and exceeding TEMPO oxidation and maleic-anhydride modification under the conditions studied. When compounded at 15 wt% into choline chloride:glycerol (ChCl:Gly) deep eutectic solvent plasticized TPS (TPS-DES), citric-modified fibers increased tensile strength to 7.4 MPa (vs. 4.4 MPa for bleached-fiber composites) and Young's modulus to 122 MPa (vs. 1.6 MPa for neat TPS-DES), with reduced elongation (similar to 12%). DMA, supported by second-heating DSC, indicated an upward shift in glass transition and distinct damping behavior consistent with interphase-controlled chain confinement. SEM fractography confirmed improved interfacial cohesion with reduced pull-out, and surface moisture resistance increased (water contact angle similar to 61 degrees). Overall, this scalable route enables biodegradable starch composites suitable for packaging films/sheets, thermoformed trays, and short-lifetime molded components from agricultural residues. [GRAPHICS] .
Keywords:
Thermoplastic starch composites
deep eutectic solvent (choline chloride:glycerol)
banana pseudostem fiber
citric acid esterification
interfacial adhesion
Journal
C
IF:
2.4
Papers:
85
Citations:
2.1K
Organization
Cited Papers