Research on properties of pineapple leaf fiber reinforced thermoplastic starch composite

doi:10.19936/j.cnki.2096-8000.20220628.009

Abstract

Abstract: In order to study the properties of natural fiber reinforced thermoplastic starch composite, pineapple leaf fiber reinforced thermoplastic starch composite was prepared by hot-pressing method by using dialdehyde starch as raw material, glycerin as plasticizer and pineapple leaf fiber as reinforced material. The effects of pineapple leaf fiber with different sizes on mechanical properties, density,water content and degradable properties of composites were studied. The surface and cross-section morphology of composites were observed by scanning electron microscope. The results show that the mechanical properties of the composites can be effectively improved by adding pineapple leaf fiber. With the decrease of the pineapple leaf fiber size, the mechanical properties of the composite gradually increase and then decrease. The tensile strength reached the maximum of 7.18 MPa with the fiber size of 0.6 mm. When the fiber size was >0.6 mm, the best flexural strength reached 13.79 MPa. With the decrease of pineapple leaf fiber size, the density of composite increased gradually, and the water content decreased generally. In the short-term degradation time, the weight loss rate of the composite gradually decreases with the reduction of fiber size in the conventional and yeast soil environment. The weight loss rate gradually tended to be the same with the extension of time.

Key words: pineapple leaf fiber, thermoplastic starch, composite, mechanical properties, degradable properties

CLC Number:

TB332

LIU Ya-qi, LIU Yun-hao, LI Pu-wang, WANG Chao, SONG Shu-hui, YANG Zi-ming. Research on properties of pineapple leaf fiber reinforced thermoplastic starch composite[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(6): 59-64.

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