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透明超亲水和超疏水纳米颗粒纹理涂层：抗污性能的比较研究

Transparent superhydrophilic and superhydrophobic nanoparticle textured coatings: comparative study of anti-soiling performance.

作者信息

Jang Gyoung Gug, Smith D Barton, Polizos Georgios, Collins Liam, Keum Jong K, Lee Dominic F

机构信息

Energy and Transportation Science Division, Oak Ridge National Laboratory (ORNL) Oak Ridge TN 37831 USA

Center for Nanophase Materials Science, ORNL USA.

出版信息

Nanoscale Adv. 2018 Dec 28;1(3):1249-1260. doi: 10.1039/c8na00349a. eCollection 2019 Mar 12.

DOI:10.1039/c8na00349a
PMID:36133208
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9473203/
Abstract

The anti-soiling (AS) performance of highly reflective, superhydrophilic (SPH, 0° water contact angle) coated mirrors was characterized and compared with that of superhydrophobic (SP, >165° water contact angle) coated mirrors. A simple one-step nanotextured silica nanoparticle coating on a mirror exhibited SPH properties associated with hydrophilic rough surfaces. Another mirror surface post-functionalized with low-surface-energy ligand molecules displayed SP behavior. Both coated mirrors, with no solar reflectance loss, demonstrated excellent AS performance because the engineered surface roughness reduced the adhesive force of dust particles. The daily degradation in solar reflectance induced by dust accumulation under outdoor field testing demonstrated that the SPH- and SP-coated mirrors, compared with an uncoated mirror, maintained higher solar reflectance, which was associated with the designed self-cleaning behavior and natural cleaning. However, over the long term, dust-moisture cementation-evidenced by organic hard water stains on the mirror-initiated unrecoverable reflectance loss on the SP-coated mirror after 3 months, whereas the SPH-coated mirror maintained higher reflectance for 7.5 months. Considering fabrication costs and maintenance, SPH-coated nanotextured mirrors offer potential benefits for application in solar energy harvesting.

摘要

对高反射超亲水（SPH，水接触角为0°）涂层镜子的抗污（AS）性能进行了表征，并与超疏水（SP，水接触角>165°）涂层镜子的抗污性能进行了比较。在镜子上采用简单的一步法制备的纳米结构化二氧化硅纳米颗粒涂层表现出与亲水性粗糙表面相关的SPH特性。另一个用低表面能配体分子进行后功能化处理的镜子表面表现出SP行为。两种涂层镜子均无太阳反射率损失，且表现出优异的AS性能，因为经设计的表面粗糙度降低了灰尘颗粒的附着力。在户外现场测试中，灰尘积累导致的太阳反射率的每日下降表明，与未涂层镜子相比，SPH涂层镜和SP涂层镜保持了更高的太阳反射率，这与设计的自清洁行为和自然清洁有关。然而，从长期来看，镜子上出现的有机硬水渍证明了灰尘与水分的胶结作用，3个月后，SP涂层镜出现了不可恢复的反射率损失，而SPH涂层镜在7.5个月内保持了较高的反射率。考虑到制造成本和维护，SPH涂层的纳米结构化镜子在太阳能收集应用中具有潜在优势。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c84b/9473203/de6a6e88d0a2/c8na00349a-f11.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c84b/9473203/d103fa051dac/c8na00349a-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c84b/9473203/f8aeb0bde640/c8na00349a-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c84b/9473203/e98f72bf9ea4/c8na00349a-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c84b/9473203/04a188e24c3b/c8na00349a-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c84b/9473203/de7e128caf9c/c8na00349a-f10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c84b/9473203/de6a6e88d0a2/c8na00349a-f11.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c84b/9473203/d103fa051dac/c8na00349a-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c84b/9473203/f8aeb0bde640/c8na00349a-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c84b/9473203/e98f72bf9ea4/c8na00349a-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c84b/9473203/04a188e24c3b/c8na00349a-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c84b/9473203/de7e128caf9c/c8na00349a-f10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c84b/9473203/de6a6e88d0a2/c8na00349a-f11.jpg

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