Abstract
A new and eco-friendly mussel-inspired surface modification pathway for bamboo fiber (BF) is presented in this study. The self-assembly polydopamine (PDA) coating can firmly adhere on BF surface, which also serves as a bridge to graft octadecylamine (ODA) for hydrophobic surface preparation. The as-formed PDA/ODA hybrid layer could supply abundant hydrophobic long-chain alkyls groups and generated a marked increase in BF surface roughness and a marked decrease in surface free energy. These changes provided advantages to improve fiber–matrix interfacial adhesion and wettability. Consequently, high performance was achieved by incorporating the hybrid modified BF into the polybutylene succinate (PBS) matrix. The resultant composite exhibited excellent mechanical properties, particularly tensile strength, which markedly increased by 77.2%. Meanwhile, considerable high water resistance with an absorption rate as low as 5.63% was also achieved. The gratifying macro-performance was primarily attributed to the excellent interfacial adhesion attained by hydrogen bonding and physical intertwining between the PDA/ODA coating on the BF and the PBS matrix, which was further determined by fracture morphology observations and dynamic mechanical analysis. Owing to the superior adhesive capacity of PDA, this mussel-inspired surface modification method may result in wide-ranging applications in polymer composites and be adapted to all natural fibers.
Highlights
Petroleum shortage and growing environment pollution have gradually prompted the development of biobased polymers derived from biomass materials
bamboo fiber (BF) to improve the by interfacial adhesion of to PDA-based layers were improve the interfacial of BF/polybutylene succinate (PBS)
PDA-based were modification approach wasadhesion developed to establish a hydrophobic and oleophiliclayers surface on BFs to improve the interfacial adhesion of BF/PBS composites
Summary
Petroleum shortage and growing environment pollution have gradually prompted the development of biobased polymers derived from biomass materials Owing to their superior biodegradability and biocompatibility, biobased polymers exhibit potential for application in industrial production and various aspects of life, with the aim to develop a more sustainable and eco-friendly society [1]. Among these polymers, polybutylene succinate (PBS) has been successfully synthesized by polycondensation of biofermentation monomers (1,4-butanediol and succinic acid) that can be obtained from natural resources, such as potato, corn, wheat, and other plants [2]. Its gas-barrier properties, relatively inferior strength, and poor thermal stability at high temperature may significantly restrict further development in these aforementioned areas [6]
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