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首页> 外文期刊>Journal of Macromolecular Science. Pure and Applied Chemistry >Studies on the effects of salt and surfactant in wet phase separation of polysulfone
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Studies on the effects of salt and surfactant in wet phase separation of polysulfone

机译：盐和表面活性剂在聚砜湿相分离中的作用研究

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This study investigates the effect of additives in the nonsolvent water in terms of cloud point during the phase inversion of Polysulfone (PS) in dimethyl formamide (DMF). The exponential pattern is observed with PS concentration (0.2 to 0.6% (w/w)). It needs a low amount of water to get the cloud point at low temperature. The cloud point varied with the nature of water matrix and depended on the amount of salt, as well as the PS amount. The presence of salts (sodium chloride and sodium sulfate) lowers the cloud point of the solution. The network distribution of the particles at the cloud point is disturbed in the presence of salt. The requirement is more for Sodium lauryl sulfate (SLS) added water to reach the cloud point in the low range of PS solution up to 0.3% PS (w/w). The morphological and distribution pattern of PS particles are very different compared to PS particles produced from pure water. XRD study of PS particles produced from the mixed water system reflects relatively more amorphous character with respect to PS particles from pure water. The presence of both surfactant and salts in water systems also influences the cloud point in synergistic manner.
机译：这项研究调查了在聚砜（PS）在二甲基甲酰胺（DMF）的相转化过程中非溶剂水中添加剂的浊点影响。在PS浓度（0.2至0.6％（w / w））下观察到指数模式。它需要少量的水才能在低温下达到浊点。浊点随水基质的性质而变化，并取决于盐的量以及PS的量。盐（氯化钠和硫酸钠）的存在降低了溶液的浊点。盐的存在会扰乱颗粒在浊点的网络分布。对添加月桂基硫酸钠（SLS）的水的要求更高，以在PS溶液的低范围内达到浊点，最高可达0.3％PS（w / w）。与由纯水制得的PS颗粒相比，PS颗粒的形态和分布模式有很大不同。混合水系统产生的PS颗粒的XRD研究表明，相对于纯净水的PS颗粒，非晶态具有相对更多的非晶性。水系统中表面活性剂和盐的存在也以协同方式影响浊点。

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