Flax/Polylactic Acid(PLA) Core/Sheath Structural Composite Yarn Fabricated by Spindle Braiding Technique

Abstract

The increasing demand for sustainable and environmentally friendly materials has driven research towards the development of green composites. In this work, the flax/polylactic acid(PLA) braided yarns were fabricated by braiding PLA filaments with 4 to 24 spindles on flax yarns. After curing at different temperatures(180 ℃ and 190 ℃), the core/sheath structural flax/PLA composite yarns were manufactured. According to the results of the tensile test, the flax/PLA composite yarn with 4-spindle PLA yarns as a sheath layer and at a curing temperature of 180 ℃ reached the maximum elastic modulus of about(5.79±0.65) GPa and the maximum tensile strength of about(162.17±18.18) MPa. This flax/PLA composite yarn with good mechanical properties would be suitable for green composites in the automobile manufacturing industry and building materials.

Keywords

flax / polylactic acid(PLA) / braiding / composite yarn / tensile property

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Funding

National Natural Science Foundation of China(52273054)

Shanghai Natural Science Foundation, China(20ZR1402200)