Page 99 - 《精细化工》2022年第11期

第 39 卷第 11 期 精 细 化 工 Vol.39, No.11
2 022 年 11 月 FINE CHEMICALS Nov. 2022

功能材料
PDMS/ZrO /SiO 超疏水辐射制冷薄膜的制备及性能
2
2

范婷婷 1,2 ，薛朝华 1,2*

（1. 陕西科技大学 轻工科学与工程学院，陕西 西安 710021；2. 轻化工程国家级实验教学示范中心，
陕西 西安 710021）

摘要：被动日间辐射制冷（PDRC）技术由于不需要外部能源、绿色清洁无污染而受到广泛关注。将聚二甲基硅
氧烷（PDMS）和 ZrO 2 粒子混合形成分散液，再将其浇铸成膜后得到 PDMS/ZrO 2 辐射制冷薄膜，然后通过喷涂
PDMS/SiO 2 分散液对其进行疏水化处理制备了一种 PDMS/ZrO 2 /SiO 2 超疏水辐射制冷薄膜。对 ZrO 2 粒径和喷涂
液中 SiO 2 用量进行了优化。结果表明，当 ZrO 2 为 500 nm，SiO 2 用量为 3.0%（以乙酸乙酯质量计）时，制得的
PDMS/ZrO 2 /SiO 2 薄膜的表面接触角可达 156°±2°，滚动角为 0.3°±0.1°，表现出优异的自清洁性能。其太阳光反
射率高达 95.3%，红外发射率>90%。在太阳光直射下，薄膜可实现平均低于环境温度 9.99 ℃的降温效果。薄膜
的自清洁性能使其表面不受泥土污染，从而具有稳定持久的辐射降温功能。此外，薄膜具有优异的机械性能、
耐摩擦性能以及耐酸/碱溶液和紫外光照稳定性。
关键词：辐射制冷材料；超疏水性；自清洁性；聚二甲基硅氧烷；功能材料
中图分类号：TB383.2 文献标识码：A 文章编号：1003-5214 (2022) 11-2249-10

Preparation and properties of PDMS/ZrO 2/SiO 2
superhydrophobic radiative cooling film

1,2
FAN Tingting , XUE Chaohua 1,2*
（1. College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an
710021, Shaanxi, China; 2. National Demonstration Center for Experimental Light Chemistry Engineering Education,
Xi'an 710021, Shaanxi, China）

Abstract: Passive daytime radiative cooling (PDRC) technology has attracted a lot of attention due to its
external-energy-free and environmentally benign properties. Herein, polydimethylsiloxane (PDMS)/ZrO 2 /SiO 2
superhydrophobic radiative cooling film was synthesized by spraying hydrophobic PDMS/SiO 2 dispersion
solution onto PDMS/ZrO 2 radiative cooling film obtained from casting and drying of PDMS/ZrO 2 dispersion
solution, during which optimization of ZrO 2 particle size and SiO 2 dosage in spraying solution were
conducted. The results showed that the PDMS/ZrO 2 /SiO 2 film with optimal ZrO 2 particles size of 500 nm and
SiO 2 dosage of 3.0% (based on the mass of ethyl acetate) had a surface contact angle of 156°±2° and a
rolling angle of 0.3°±0.1°, exhibiting excellent self-cleaning activity. Moreover, its sunlight reflectance
reached up to 95.3% with infrared emissivity >90%. The average film cooling was efficient, 9.99 ℃ lower
than ambient temperature under direct sunlight. The self-cleaning property could keep the film from soil
contamination and maintain the cooling performance. Furthermore, the film displayed good mechanical
properties, friction resistance, and stability against acid/alkali solutions and UV light.
Key words: passive radiative cooling materials; superhydrophobicity; self-cleaning property; polydimethylsiloxane;
functional materials

收稿日期：2022-04-17; 定用日期：2022-05-20; DOI: 10.13550/j.jxhg.20220361
基金项目：国家自然科学基金项目（52103263）；中国博士后科学基金项目（2020M683410）；陕西省重点研发计划项目
（2020ZDLGY13-11）；陕西省自然科学基金项目（2020JM-506）
作者简介：范婷婷（1997—），女，硕士生，E-mail：872602450@qq.com。联系人：薛朝华（1974—），男，教授，E-mail：xuechaohua@126.com。