炭黑/CNF复合光热转化材料的制备及性能研究

Study on Preparation and Properties of Carbon Black/CNF Composite Photothermal Conversion Materials

关键词:  纤维素纳米纤丝  炭黑  光热转化材料  海水淡化

Key Words:cellulose nanofibrils  carbon black  photothermal conversion materials  desalination

摘要:太阳能光热转化材料在海水淡化应用方面具有巨大的潜力和广阔的前景，因此开发水蒸发效率高、成本低、可生物降解的光热转化材料对海水淡化技术的发展有着重要的意义。本研究采用纤维素纳米纤丝（CNF）为原料，辅以炭黑、胶黏剂等，制备出炭黑/CNF复合光热转化材料，并对其光吸收性能、海水平均蒸发效率、隔热性能进行了研究。结果表明，该材料具有良好的光吸收性能、海水平均蒸发效率和隔热性能。最佳炭黑用量为1.0%，此时其太阳能总吸收率为92.05%，海水平均蒸发速率可达到1.17 kg/（m²•h），导热系数为0.05 W/（m•K）。

Abstract:Solar energy photothermal conversion materials have great potential and broad application prospects in desalination. It is of great significance to develop photothermal conversion materials with high evaporation efficiency, low cost and biodegradability for the development of desalination technology. In this study,carbon black /CNF composite photothermal conversion materials were prepared by using nanofiltration cellulose (CNF) as raw materials with adding carbon black and adhesives. The photothermal conversion efficiency, sea water evaporation efficiency, thermal insulation performance were also studied. The results showed that the material had good photo absorption performance, sea water evaporation efficiency and thermal insulation performance. The best dosage of carbon black was 1.0%, the total solar energy absorption efficiency was 92.05%, the evaporation efficiency of sea water was 1.17 kg/(m²·h) and thermal conductivity was 0.05 W/（m•K）.