Interface compatibility and mechanisms of improved mechanical performance of starch/poly(lactic acid) blend reinforced by bamboo shoot shell fibers

Abstract

Bamboo shoot shell fibers (BSSFs)/starch/poly(lactic acid) (PLA) ternary composites were prepared by blending BSSFs to starch/PLA matrices for the purpose of expanding BSSFs applications to enhance starch/PLA composites and creating a new low-cost biodegradable composite. The effects of BSSFs content (0-40 wt %) on the physical-mechanical properties were tested and interface compatibility and its mechanism to mechanical performance of BSSFs/starch/PLA composites were characterized by SEM-EDS, TG. The results showed that the mechanical strength, surface wettability, and water absorption of the composites continued improving when the BSSFs content increased from 0% to 20 wt %. However, mechanical modulus increased with increase in BSSFs content. The results of fracture microstructure and thermal property exhibited a good interfacial compatibility at low content of BSSFs and an interface debonding at high content of BSSFs. These investigations indicated that the BSSFs reinforcement to the composite is not consistent with interface compatibility of the ternary composites. The composites should be considered as a kind of green and low-cost biodegradable materials to replace traditional single-phase or multiphase materials.

Production and Application of Cellulose, Dietary Fiber, and Nanocellulose from Bamboo Shoot

“…The modifications can destroy the hydrogen bonds between the lignin and hemicellulose of BSDF, significantly decreased the particle size of BSDF, and increased the SDF content, which increased oil holding capacity (OHC) and water swelling capacity (WSC) in BSDF by 55. 35 and 91.47%, respectively. It is considered that combined modification technologies are effective methods to improve the quality of BSDF [42].…”

“…BSSF was blended with starch/poly(lactic acid) (PLA) matrices to create a new low-cost biodegradable ternary composite. The mechanical strength, surface wettability, and water absorption of the composite have been increasingly improved with the rise of BSSF content from 0 to 20 wt% [35]. Also, it was used to cross-link with sodium alginate (SA) based on hydrogen bonding.…”

Cardanol derivatives as compatibilizers for strengthening and toughening polylactic acid/bamboo fiber bio‐composites

“…Therefore, raising the compatibility between BFs and the PLA is the core to ameliorating the comprehensive properties of PLA/BF composites. 7,14,15 In order to improve the adhesive force of PLA/BF composites interface, many strategies have been carried out for modifying BFs using chemical, plasma, or physical treatments. [16][17][18] Chemical treatments involve using various chemicals to modify the chemical composition of the BF surface layer of BFs.…”

“…However, the hydrophilicity and intermolecular hydrogen bonding of BFs reduce the stress transfer efficiency from hydrophobic PLA to BFs, causing a raise in moisture absorption and a lower in adhesive force of PLA/BF composites interface. Therefore, raising the compatibility between BFs and the PLA is the core to ameliorating the comprehensive properties of PLA/BF composites 7,14,15 …”