A stable and flexible carbon black/polyethyleneimine‐bacterial cellulose photothermal membrane for high‐efficiency solar vapor generation,International Journal of Energy Research

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A stable and flexible carbon black/polyethyleneimine‐bacterial cellulose photothermal membrane for high‐efficiency solar vapor generation
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2020-06-09 , DOI: 10.1002/er.5598
Shang Liu _{1,

2} , Congliang Huang _{1,

2}

Affiliation

Although various special materials have been exploited for enhancing evaporation performance of a solar vapor generation system, their practical applications could be greatly limited by structure destruction due to the seawater corrosion and external mechanical forces. In this work, we have developed a carbon black/polyethyleneimine‐bacterial cellulose (CPB) membrane with vacuum filtration method to simultaneously enhance the strength and evaporation performance of solar vapor generation system, by applying carbon blacks as the photo‐thermal conversion material, bacterial cellulose as the skeleton material for enhancing the structure strength, and polyethyleneimine (PEI) for tailoring the water absorption capacity. Effects of carbon black particle concentrations and PEI concentrations were probed, respectively, for optimizing the light absorption capacity and water absorption capacity in laboratory. Furthermore, the outdoor experiments were carried out to evaluate the strength and evaporation performances of CPB membrane. Results show that the evaporation efficiency of the CPB membrane could reach about 85.05% and 81.89% in the lab and outdoor under one sun irradiation. Additionally, a force of 59.37 MPa and folding more than 100 times will not break the structure of CPB membrane, which confirms the preferable structure strength. This superior CPB membrane, together with its low cost, simple fabrication, excellent mechanical properties, scalability and desalination ability, provides a feasible way for practical applications.

中文翻译：

稳定而灵活的炭黑/聚乙烯亚胺细菌纤维素光热膜，可高效产生太阳蒸气

尽管已经开发了各种特殊材料来增强太阳能蒸汽发生系统的蒸发性能，但是由于海水腐蚀和外部机械力而导致的结构破坏会极大地限制其实际应用。在这项工作中，我们开发了一种采用真空过滤方法的炭黑/聚乙烯亚胺细菌纤维素（CPB）膜，通过将炭黑用作光热转化材料，细菌来同时增强太阳能蒸气发生系统的强度和蒸发性能。纤维素是用于增强结构强度的骨架材料，而聚乙烯亚胺（PEI）是用于调整吸水能力的材料。分别探讨了炭黑颗粒浓度和PEI浓度的影响，用于优化实验室的光吸收能力和吸水能力。此外，进行了室外实验以评估CPB膜的强度和蒸发性能。结果表明，在室内和室外一次阳光照射下，CPB膜的蒸发效率分别达到约85.05％和81.89％。另外，59.37 MPa的力和100倍以上的折叠不会破坏CPB膜的结构，这证实了优选的结构强度。这种卓越的CPB膜具有低成本，简单制造，出色的机械性能，可扩展性和脱盐能力，为实际应用提供了一种可行的方法。进行了室外试验，以评价CPB膜的强度和蒸发性能。结果表明，在室内和室外一次阳光照射下，CPB膜的蒸发效率分别达到约85.05％和81.89％。另外，59.37 MPa的力和100倍以上的折叠不会破坏CPB膜的结构，这证实了优选的结构强度。这种卓越的CPB膜具有低成本，简单制造，出色的机械性能，可扩展性和脱盐能力，为实际应用提供了一种可行的方法。进行了室外试验，以评价CPB膜的强度和蒸发性能。结果表明，在室内和室外一次阳光照射下，CPB膜的蒸发效率分别达到约85.05％和81.89％。另外，59.37 MPa的力和100倍以上的折叠不会破坏CPB膜的结构，这证实了优选的结构强度。这种卓越的CPB膜具有低成本，简单制造，出色的机械性能，可扩展性和脱盐能力，为实际应用提供了一种可行的方法。37 MPa和100倍以上的折叠不会破坏CPB膜的结构，这证实了较好的结构强度。这种卓越的CPB膜具有低成本，简单制造，出色的机械性能，可扩展性和脱盐能力，为实际应用提供了一种可行的方法。37 MPa和100倍以上的折叠不会破坏CPB膜的结构，这证实了较好的结构强度。这种卓越的CPB膜具有低成本，简单制造，出色的机械性能，可扩展性和脱盐能力，为实际应用提供了一种可行的方法。

更新日期：2020-06-09

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