当前位置：
X-MOL 学术
›
ACS Appl. Mater. Interfaces
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Self-Densified Optically Transparent VO2 Thermochromic Wood Film for Smart Windows
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-05-10 , DOI: 10.1021/acsami.1c03803 Sai Liu 1 , Chi Yan Tso 1 , Hau Him Lee 1 , Yu Wei Du 1 , Kin Man Yu 2 , Shien-Ping Feng 3 , Baoling Huang 4
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-05-10 , DOI: 10.1021/acsami.1c03803 Sai Liu 1 , Chi Yan Tso 1 , Hau Him Lee 1 , Yu Wei Du 1 , Kin Man Yu 2 , Shien-Ping Feng 3 , Baoling Huang 4
Affiliation
|
Optically transparent wood has emerged as a promising glazing material. Thanks to the high optical transmittance, strong mechanical properties, and excellent thermal insulation capability of transparent wood, it offers a potential alternative to glass for window applications. Recently, thermo-, electro-, and photochromic transparent woods that dynamically modulate light transmittance have been investigated to improve building energy efficiency. However, it remains challenging to widely replace windows with transparent wood because of its poor weather resistance. In this study, an environment-friendly thermochromic transparent wood film (TTWF) with thermal switching of transmittance is proposed and demonstrated. To achieve thermochromism, the bleached wood is impregnated with the vanadium dioxide (VO2)/polyvinyl alcohol composite. Due to the self-densification of cellulose microfibrils during the evaporation of solvents, the transparent wood is in the form of thin films, which can be attached on the inner face of a window to protect it from severe weather conditions, making the installation convenient and low-cost. Furthermore, the surface of VO2-TTWF is modified by octadecyltrichlorosilane to enhance the waterproof ability and achieve self-cleaning and antidust functions. The proposed VO2-TTWF shows great potential for application in energy-efficient buildings using sustainable materials with advanced optical properties (i.e., Tlum = 50.5%, ΔTsol = 3.4%, and haze = 70%) that are mechanically robust (i.e., σ = 130.6 MPa along the wood growth direction), have low-thermal conductivity (i.e., K = 0.29 W m–1 K–1 along the perpendicular direction to the wood fibers), and demonstrate hydrophobic self-cleaning and antidust functions (i.e., contact angle: 121.9°). An experiment, using a model house, showed that the VO2-TTWF attached on the inner face of the window could significantly reduce the indoor air temperature by 33.9 °C compared with a bare glass panel, proving that VO2-TTWF has potential to be applied as a new-generation energy-efficient material for smart windows.
中文翻译：
用于智能窗户的自增稠光学透明VO 2热致变色木膜
光学透明的木材已经成为一种有前途的上光材料。得益于透明木材的高透光率，强大的机械性能和出色的隔热性能，它为窗户应用提供了玻璃的潜在替代品。近来，已经研究了动态地调节透光率的热，电和光致变色透明木材，以提高建筑的能效。然而，由于其耐候性差，用透明木材广泛地替换窗户仍然是挑战。在这项研究中，提出并证明了一种具有透射率热转换的环保型热变色透明木膜（TTWF）。为了实现热致变色，将漂白木材用二氧化钒（VO 2）/聚乙烯醇复合材料。由于在溶剂蒸发过程中纤维素微纤维会自动致密化，因此透明木材呈薄膜形式，可以将其附着在窗户的内表面上，以保护其免受恶劣天气的影响，从而使安装方便快捷。低成本。此外，VO 2 -TTWF的表面被十八烷基三氯硅烷改性，以增强防水性能并实现自清洁和防尘功能。所提出的VO 2个，使用了先进的光学性质（可持续材料在节能建筑应用-TTWF显示很大的潜力，即，Ť LUM = 50.5％，Δ Ť溶胶= 3.4％，雾度= 70％，具有机械强度（即，沿木材生长方向的σ= 130.6 MPa），导热率低（即，沿垂直方向的K = 0.29 W m –1 K –1）并具有疏水性的自我清洁和防尘功能（即接触角：121.9°）。使用样板房进行的实验表明，与裸露的玻璃面板相比，附着在窗户内表面上的VO 2 -TTWF可以将室内空气温度降低33.9°C，这证明VO 2 -TTWF有潜力用作智能窗户的新一代节能材料。
更新日期：2021-05-19
中文翻译：
用于智能窗户的自增稠光学透明VO 2热致变色木膜
光学透明的木材已经成为一种有前途的上光材料。得益于透明木材的高透光率，强大的机械性能和出色的隔热性能，它为窗户应用提供了玻璃的潜在替代品。近来，已经研究了动态地调节透光率的热，电和光致变色透明木材，以提高建筑的能效。然而，由于其耐候性差，用透明木材广泛地替换窗户仍然是挑战。在这项研究中，提出并证明了一种具有透射率热转换的环保型热变色透明木膜（TTWF）。为了实现热致变色，将漂白木材用二氧化钒（VO 2）/聚乙烯醇复合材料。由于在溶剂蒸发过程中纤维素微纤维会自动致密化，因此透明木材呈薄膜形式，可以将其附着在窗户的内表面上，以保护其免受恶劣天气的影响，从而使安装方便快捷。低成本。此外，VO 2 -TTWF的表面被十八烷基三氯硅烷改性，以增强防水性能并实现自清洁和防尘功能。所提出的VO 2个，使用了先进的光学性质（可持续材料在节能建筑应用-TTWF显示很大的潜力，即，Ť LUM = 50.5％，Δ Ť溶胶= 3.4％，雾度= 70％，具有机械强度（即，沿木材生长方向的σ= 130.6 MPa），导热率低（即，沿垂直方向的K = 0.29 W m –1 K –1）并具有疏水性的自我清洁和防尘功能（即接触角：121.9°）。使用样板房进行的实验表明，与裸露的玻璃面板相比，附着在窗户内表面上的VO 2 -TTWF可以将室内空气温度降低33.9°C，这证明VO 2 -TTWF有潜力用作智能窗户的新一代节能材料。
京公网安备 11010802027423号