基于聚四氟乙烯/石墨烯/砂芯的光热水蒸发实验设计  

Experimental Design of Photothermal Water Evaporation Based on PTFE/Graphene/Sand Core

作　　者：于鹤 朱恒 韩秋彤 YU He;ZHU Heng;HAN Qiutong(School of Physical and Mathematical Sciences,Nanjing Tech University,Nanjing 211816,China)

机构地区：[1]南京工业大学数理科学学院,南京211816

出　　处：《实验室研究与探索》2024年第11期31-34,共4页Research and Exploration In Laboratory

基　　金：教育部产学合作协同育人项目(231107027280201);江苏省高等学校自然科学研究项目(23KJB00);江苏省自然科学基金项目(BK20230309)。

摘　　要：为了提高海水蒸发光热转换效率,设计了一种蘑菇形隔离式水蒸发装置。“菌盖”由聚四氟乙烯(PTFE)/石墨烯/砂芯组成,“菌柄”为细海绵柱。利用该水蒸发装置进行光热界面水蒸发实验。实验结果表明,在2个太阳光强度照射下海水单位面积蒸发速率达到了1.57 kg/(m^(2)·h),并且保持了相对较好的稳定性;PTFE的疏水性阻止盐晶在加热层表面析出,保证了石墨烯的光热转换效率。该实验可培养学生将理论知识用于实验研究的能力。To enhance the photothermal conversion efficiency of seawater evaporation,a mushroom-shaped isolated water evaporation device was designed.The“cap”of the mushroom is composed of polytetrafluoroethylene(PTFE)/graphene/sand core,while the“stem”is a fine sponge column.Using this water evaporation device,photothermal interfacial seawater evaporation experiments were conducted to test the evaporation performance.The results of the seawater interfacial evaporation experiments show that under the illumination of 2 suns intensity,the evaporation rate per unit area of seawater reaches 1.57 kg/(m^(2)·h),and maintains relatively good stability.The hydrophobicity of PTFE prevents salt crystals from precipitating on the surface of the heating layer,ensuring the photothermal conversion efficiency of graphene.This experiment can cultivate students’ability to apply theoretical knowledge to experimental research.

关 键 词：界面水蒸发 隔离式 SiO_(2)砂芯 自清洁表面 

分 类 号：O469[理学—凝聚态物理] TK519[理学—电子物理学]