分散剂5040对Cs_(0.33)WO_3粒子分散及其涂层性能的影响

Effects of dispersant 5040 on the dispersion of Cs_(0.33)WO_3 particles and its coating properties

选用5040((C_3H_3NaO_2)_n)作为分散剂,通过球磨分散法制备了Cs_(0.33)WO_3浆料,研究了分散剂量和球磨时间对Cs_(0.33)WO_3浆料稳定性的影响。并通过加入聚乙烯醇(PVA)、成品丙烯酸乳液(PVC)及自制的丙烯酸乳液制备了Cs_(0.33)WO_3涂层,研究了Cs_(0.33)WO_3涂层的可见光透过和近红外遮蔽性能。结果表明,对于分散剂5040,在相对Cs_(0.33)WO_3粉体质量分数5%、球磨分散时间6h时,所制备的Cs_(0.33)WO_3浆料稳定性最高,在15d内Cs_(0.33)WO_3浆料的沉降高度与浆料总高度比可维持在16%左右,可见光最大透过率为59%。PVA/Cs_(0.33)WO_3和PVC/Cs_(0.33)WO_3涂层均有70%左右的可见光透过率,但PVC/Cs_(0.33)WO_3涂层具有更为优异的近红外遮蔽性能。

Cs_(0.33)WO_3 slurry was prepared using 5040((C_3H_3NaO_2)n)as dispersing agent through ball milling dispersion method.Effects of dispersant amount and ball milling time on dispersion stability of the slurry were investigated.The Cs_(0.33)WO_3 coating was prepared by adding polyvinyl alcohol(PVA),acrylic emulsion finished(PVC)and homemade acrylic emulsion,and its visible light transparency and near infrared shielding ability were investigated.The results showed that the Cs_(0.33)WO_3 slurry had best stability and the ratio sediment height could be maintained at about 16% for 15 d when the mass amount of dispersant was 5% and the ball milling dispersion time was 6 h.UV-Vis spectra analysis results showed that the maximum transmittance of prepared acrylic/Cs_(0.33)WO_3 coatings was 59%,while PVA/Cs_(0.33)WO_3 and PVC/Cs_(0.33)WO_3 coatings both could reach to 70%.PVC/Cs_(0.33)WO_3 coating exhibits better near-infrared shielding capability compared with PVA/Cs_(0.33)WO_3.