▎ 摘　　要

We report here a series of bio-based composite films by addition different amounts of graphene nanoplate-lets (GnPs) (0, 2, 4, 6 and 8 wt%) into Eucommia rubber (ER) matrix. These films were analyzed using Raman, XPS, XRD, and AFM. Subsequently, the mechanical property, thermal stability, water contact angle, water vapor permeability (WVP), and electromagnetic (EM) wave absorption of the GnPs/ER composite films as well as their photothermal conversion effects on soil temperature were also extensively investigated. Incorporation of GnPs effectively improved the thermal stability and tensile strength of the films and decreased the WVP. More importantly, the GnPs/ER composite films exhibited excellent photothermal performance for enhancing soil temperature. Especially, the 8 wt% GnPs/ER composite film with the highest photothermal conversion efficiency (40.3%) is increased by 5 times compared with that of the PE film (6.7%) when the temperature of soil surface is 27 degrees C. It demonstrates that combination of GnPs and ER is a promising strategy to promote the photothermal conversion capability and barrier property for the composite films. (C) 2020 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.