Intending to achieve more green and economical graphene impregnated modified fast-growing poplar wood veneer for heat conduction, this study proposes and investigates the feasibility of modified veneer with graphene/Polyvinyl alcohol (Gr/PVA) impregnation mixture to improve its thermal conductivity. The absorbance and viscosity of the Gr/PVA impregnation mixtures are observed to expound the Gr/PVA ratio effects on the mixtures. Simultaneously, the weight percent gain, chromatic aberration, and thermal conductivity of the modified veneers are measured to determine the impregnation effect and the optimal impregnation formula. Further, the chemical structure, crystallinity, and thermal stability of the optimal sample impregnated with Gr/PVA are tested. The results show that the thermal properties of the Gr/PVA impregnated modified veneer have not all been improved. Still, both the dispersibility of the impregnation mixtures and the impregnation effect is affected by the Gr/PVA ratio. The data shows that the optimal thermal conductivity of modified veneer, which is up to 0.22 W·m⁻¹·K⁻¹ and 2.4 times the untreated one, is dipped by the mixture of 10 wt.% PVA concentration and 2 wt.% MGEIN addition. According to the characterization tests, the crystallinity of the modified veneer reduces, but the thermal stability improves.

中文翻译：

---

石墨烯/聚乙烯醇浸渍杨木单板的导热系数

为了实现更绿色、更经济的石墨烯浸渍改性速生杨木单板的导热性，本研究提出并探讨了石墨烯/聚乙烯醇（Gr/PVA）浸渍混合物改性单板提高其导热性能的可行性。观察到 Gr/PVA 浸渍混合物的吸光度和粘度说明了 Gr/PVA 比率对混合物的影响。同时，测量改性单板的增重率、色差和导热系数，以确定浸渍效果和最佳浸渍配方。此外，测试了用 Gr/PVA 浸渍的最佳样品的化学结构、结晶度和热稳定性。结果表明，Gr/PVA浸渍改性单板的热性能并没有得到全部改善。尽管如此，浸渍混合物的分散性和浸渍效果都受 Gr/PVA 比的影响。数据表明，改性单板的最佳导热系数可达0.22 W·m^-1 ·K ^-1和未处理的2.4倍，被10wt.% PVA浓度和2wt.% MGEIN添加物的混合物浸渍。根据表征测试，改性单板的结晶度降低，但热稳定性提高。