钠-萘处理液浓度与聚四氟乙烯薄膜改性效果关系的研究

采用钠-萘处理液对聚四氟乙烯(PTFE)微孔薄膜进行表面改性,改性后PTFE薄膜表面形成了一层粗糙的处理层。表面元素分析表明薄膜表面F元素含量显著降低;接触角和剪切强度测试表明处理液浓度0.4mol/L为最佳处理条件,薄膜的亲水性和粘结性能都得到了明显的改善。

聚四氟乙烯局部处理液的研制

研究了用于聚四氟乙烯局部处理的萘钠液的制备方法 ,说明了对聚四氟乙烯表面处理的工艺过程。

Solubilities of 2-Naphthalenesulfonic Acid Monohydrate and Sodium 2-Naphthalenesulfonate in Sulfuric Acid Solution and Their Application for Preparing Sodium 2-Naphthalenesulfonate

The solubilities of 2-naphthalenesulfonic acid monohydrate and sodium 2-naphthalenesulfonate in sulfuric acid solutions were measured at temperatures ranging from 278,15 to 338.15 K by using a dynamic method. The concentration of sulfuric acid solution ranged from 0 to 80wt%. The solubilities of 2-naphthalenesulfonic acid monohydrate and sodium 2-naphthalenesulfonate increased with temperature, and both of them were the lowest at 70wt% of sulfuric acid solution （ w3 0 = 0.70） while the highest in pure water. The solubility data were correlated by the modified Apelblat equation. Based on the solubility difference between 2-naphthalenesulfonic acid monohydrate and sodium 2-naphthalenesulfonate, a new technique in which sodium sulfate was used to replace sodium sulfite in the neutralization reaction was developed. The suitable mole ratio of H20 to Na2SO4 in the neutralization reaction was 80 ： 1, and that of 2-naphthalenesulfonic acid monohydrate to Na2SO4 was 3.2 ： 1. The material balance under the suitable mole ratios was given and discussed.