We report here a series of bio-based composite films by addition different amounts of graphene nanoplatelets (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 °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.

我们通过向杜仲中添加不同量的石墨烯纳米片（GnP）（0、2、4、6和8 wt％）来报告一系列生物基复合膜橡胶（ER）基质。使用拉曼，XPS，XRD和AFM对这些膜进行了分析。随后，还广泛研究了GnPs / ER复合膜的机械性能，热稳定性，水接触角，水蒸气渗透率（WVP）和电磁波（EM）吸收以及光热转化对土壤温度的影响。掺入GnPs可以有效改善薄膜的热稳定性和拉伸强度，并降低WVP。更重要的是，GnPs / ER复合膜具有出色的光热性能，可提高土壤温度。特别是当土壤表面温度为27°C时，具有最高光热转换效率（40.3％）的8 wt％GnPs / ER复合膜比PE膜（6.7％）增长5倍。