碳化温度对泡沫碳光热水蒸发性能的影响  

Effect of carbonization temperature on the solar steam generation of carbon foam

作　　者：袁家相 方伟[1] 陈辉[1] 王大珩 杜星[1] 何漩[1] 李薇馨 赵雷[1] YUAN Jiaxiang;FANG Wei;CHEN Hui;WANG Daheng;DU Xing;HE Xuan;LI Weixin;ZHAO Lei(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,武汉430081

出　　处：《功能材料》2023年第1期1186-1193,共8页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(批准号:51802234,22105151);湖北省自然科学基金资助项目(批准号:2021CFB469,2021CFB124);湖北省教育厅科学技术研究项目(B2020010)。

摘　　要：采用表面活性剂发泡法制备三维多孔泡沫碳光吸收体,通过改变碳化温度调节泡沫碳有机质/C相对含量比,研究其与光吸收、导热率的关系,找到最优平衡点,综合优化太阳光水蒸发性能。结果表明,泡沫碳的碳化温度对泡沫碳中有机质/C相对含量比和孔结构有直接影响,有机质/C相对含量的降低可有效提高样品光吸收率,但也会引起隔热性能降低,使水蒸发体系热管理能力变差;碳化温度为600℃时,泡沫碳光吸收-热管理达到最优平衡点,获得最高的光吸收率(96.5%)和最优的太阳光水蒸发性能(1.0391 kg m^(-2)h^(-1)),其水蒸发率是纯水的2.08倍。A three-dimensional porous carbon foam absorber was prepared by surfactant foaming method.The relative content of organic matter/C for carbon foam was adjusted by varying the carbonization temperature.The relationship of organic matter/C,light absorption and thermal conductivity was studied to find an optimal equilibrium for comprehensively optimizing the solar steam evaporation performance.Results show that the carbonization temperature has a great effect on the relative content of organic matter/C and pore structure of carbon foam.With reducing relative content of organic matter/C,it demonstrates a significant improvement for light absorption,but also suffers a decrease of thermal insulation performance,which worsens the thermal management ability of solar evaporation system.When carbonized at 600℃,the carbon foam absorber can acquire a optimal equilibrium between light absorption and thermal management,which reveals the highest absorption rate(96.5%)and best solar steam evaporation performance(1.0391 kg/(m^(2)·h)).The vapor evaporation rate is 2.08 times higher than that of pure water.

关 键 词：泡沫碳 碳化温度 光吸收 热管理 太阳光水蒸发性能 

分 类 号：O632.72[理学—高分子化学] TB34[理学—化学]