A solar vapor generation system with a high evaporation efficiency and also a high mechanical strength is still attractive, while most previous works only focused on efficiency. Herein, we firstly prepared a carbon‐black/wood‐flour system with strength enhanced by polystyrene. Then, we investigated the effects of porosity, polystyrene content, and thermal insulation on the evaporation performance of the system. Experimental results indicate that the porosity of system can significantly affect the evaporation efficiency. With the increase of porosity, there exists an optimal porosity to obtain a high evaporation efficiency. A higher content of polystyrene, which could cause a lower thermal conductivity of the system, always gives a higher evaporation efficiency when the porosity is fixed. For polystyrene content of 60 wt% and system porosity of 36%, under a 1‐sun irradiation, there is an optimal evaporation efficiency of about 80.4%. Additionally, the fracture stresses of the system in dry and wet states could be as high as 2.18 and 2.03 MPa, respectively, which ensures the system strength. Considering the high efficiency, high mechanical strength, low cost, and easy preparation, this system has a good potential to be used in practical applications.

中文翻译：

---

聚苯乙烯增强强度的炭黑/木粉系统的太阳蒸气产生优化

具有高蒸发效率和高机械强度的太阳能蒸气产生系统仍然是有吸引力的，而大多数先前的工作仅关注效率。在这里，我们首先准备了一种炭黑/木粉系统，该系统通过聚苯乙烯增强了强度。然后，我们研究了孔隙率，聚苯乙烯含量和隔热对系统蒸发性能的影响。实验结果表明，系统的孔隙率会显着影响蒸发效率。随着孔隙率的增加，存在最佳孔隙率以获得高蒸发效率。当孔隙率固定时，较高含量的聚苯乙烯可能会导致系统较低的热导率，但总会产生较高的蒸发效率。对于60重量％的聚苯乙烯含量和36％的系统孔隙率，在1阳光照射下，最佳蒸发效率约为80.4％。此外，系统在干态和湿态下的断裂应力分别高达2.18和2.03 MPa，从而确保了系统强度。考虑到高效率，高机械强度，低成本和易于制备，该系统具有在实际应用中的良好潜力。