Papers by Author: Yong Qing Zhao

Abstract: A new biocomposite based on chicken feather fiber (CFF) and Poly (lactic acid) (PLA) was fabricated for the first time by melting compound methods. Its mechanical properties and fracture surfaces were investigated by using tensile tests and scanning electron microscopy (SEM), respectively. The results showed that the tensile modulus and elongation at break of PLA samples were improved by adding a small amount of CFF. The elongation at break of a CFF/PLA sample with 2 wt% of CFF was 56% higher than that of pure PLA. This may ascribe to the good adhesion and interactions between the CFF and PLA matrix.

Abstract: Mechanical properties of two different types of silkworm silk fibers under three conditions: (i) Bombyx mori; (ii) twisted Bombyx mori; and (iii) Tussah silk fibers were under investigations. The values of ultimate tensile strength, elongation at break and Young’s modulus were examined by performing tensile test on single bave. Scanning electron microscopy (SEM) was used to observe the morphologies of the two different types of silk fibers, and measure their general diameters so as to determine the cross-sectional area of the two different types of silk fibers and convert the experimental load-extension data into stress-strain data accordingly.