Abstract

Drying studies of poly(vinyl alcohol) – water-based coatings are reported. Polymeric surfactant:poly(ethylene glycol) and fluorosurfactant:Capstone has been used to enhance the drying rate of this slow drying system. The drying rate enhanced with an increase in surfactant loading up to 10 wt%. Residual solvent content was decreased to 46.87% with 1.04% capstone loading in 5% PVA coating. Later on, there is no significant change in residual solvent due to a change in the nature of solution-viscoelasticity. Poly(ethylene glycol) can minimize residual solvent up to 20 wt% poly(vinyl alcohol). Both the increased concentration of poly(vinyl alcohol) and addition of surfactants to the coating solution exhibits a range of rheological behaviors such as Newtonian(5 wt%), shear-thinning/shear-thickening (10 wt%), and viscoelasticity(20 wt%).

摘要

报告了聚（乙烯醇）水性涂料的干燥研究。聚合物表面活性剂：聚（乙二醇）和含氟表面活性剂：Capstone 已用于提高这种慢干系统的干燥速度。干燥速率随着表面活性剂负载量的增加而提高，最高可达 10 wt%。残留溶剂含量降低至 46.87%，在 5% PVA 涂层中添加 1.04% 的顶点。后来，由于溶液粘弹性性质的变化，残留溶剂没有显着变化。聚（乙二醇）可以最大限度地减少残留溶剂高达 20 wt% 的聚（乙烯醇）。增加的聚乙烯醇浓度和向涂料溶液中添加表面活性剂都表现出一系列流变行为，例如牛顿 (5 wt%)、剪切变稀/剪切增稠 (10 wt%) 和粘弹性 (20重量％）。