Effect of Different Surface Treatment for Bamboo Fiber on the Crystallization Behavior and Mechanical Property of Bamboo Fiber/Nanohydroxyapatite/Poly(lactic-co-glycolic) Composite

Bamboo fiber was treated by two different surface treatment methods of alkali treatment, silane modification after alkali treatment, and SEM, FTIR, XRD, and XPS were used to analyze bamboo fiber before and after treatment. The results showed that the surface morphology, crystallization degree, and chemical elements of bamboo fiber were changed after being treated with different surface treatment methods. Then, the treated bamboo fibers were designed to separately incorporate into the nanohydroxyapatite/PLGA (n-HA/PLGA) composite, and the crystallization behavior and mechanical properties of the bamboo fiber/n-HA/PLGA ternary composites were evaluated by DSC, POM, XRD, SEM, and the electromechanical universal tester. The results indicated that surface-treated bamboo fiber has a greater potential in promoting the crystallization of PLGA, and the interfacial adhesion and compatibility were improved, so that the tensile strength and elongation of the composite with alkali treated bamboo fiber were increased by 47.6% and 64.3%, respectively, and the bending strength and flexural modulus of the composite with silane modification after alkali treatment BF were also enhanced nearly 10 and 400 MPa, respectively, compared to the untreated bamboo fiber. All the above results suggested surface-treated bamboo fiber might develop a novel biodegradable bamboo fiber/n-HA/PLGA ternary composite used as bone materials in the future.