Welcome to Journal of Automotive Safety and Energy,
汽车安全与节能学报

Journal Of Automotive Safety And Energy ›› 2019, Vol. 10 ›› Issue (4): 511-517.DOI: 10.3969/j.issn.1674-8484.2019.04.013

• Automotive Energy Efficiency & Environment Protection • Previous Articles     Next Articles

Preparation, processing and properties of hemp stalk powder/ polylactic acid composites for automobiles

WANG Chunhong1,2, WANG Lijian1, ZUO Hengfeng2, WANG Ni1, Noor Intan Saffinaz Anuar3, Peyman Servati4, Frank Ko5   

  1. (1. School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China; 
    2. State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China; 
    3. Bioresources and Biorefinery Laboratory, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, UKM Bangi, Selangor, 43600, Malaysia; 
    4. Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada; 
    5. Materials Engineering Department, University of British Columbia, Vancouver, BC V6T 1Z4, Canada)
  • Received:2019-05-10 Online:2019-12-31 Published:2020-01-01

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Abstract: A fully degradable wood-plastic composite material was prepared for automotive interiors to reduce the mass of automobiles and protect the environment. The composite was prepared from hemp stalk powder and degradable polylactic acid (PLA) by using a twin-screw extruder for pelletization and compression molding. An optimal process for press molding was obtained: 160 ℃, 7.5 MPa, 5 min for the three influencing factors of temperature, pressure, and time, after orthogonal test analysis of 4 mechanical performance indicators. The results show that the composite has its highest mechanical properties in tensile strength, bending strength, tensile modulus and bending modulus, which are 40.26, 73.84 MPa and 2.06, 4.35 GPa for the hemp stalk powder with a mass fraction of 30% and a diameter of 40 mesh.

Key words: lightweight of automobile, automotive interior, degradable wood plastic composite, polylactic acid(PLA) , hemp straw powder,  compression molding