Polymerization-induced self-assembly (PISA) in dispersed phase polymerization enables the synthesis of fibers and other self-assembled nanostructures at the quantities and cost required for use in commodity paints. Here we studied the effect of adding three types of fibers to coatings of two commodity paints with different glass transition temperatures (T_g). Film-forming (FF) fibers and rigid polystyrene (PS) fibers analysed were synthesized by RAFT-PISA at ∼20 g scales with a promising degree of purity (75% and 63% respectively), with kilogram-scale synthesis also demonstrated. These fibers, as well as naturally sourced microfibrillated cellulose fibers, were added to paint, and their effect was tested on the stain resistance and tensile properties of the coatings produced. The fiber content added was determined by the desired viscosity needed for the application of coatings. The extensibility of both paint coatings was shown to decrease with the addition of the high T_g PS fibers, whereas extensibility and toughness increased with the addition of low T_g FF fibers. Cellulose fibers were seen to increase extensibility at low loadings, but in turn added hydrophilic and hygroscopic components, exposing the paint to increased staining. In contrast, the FF fibers showed a notable improvement in stain resistance in addition to the tensile benefits conferred. No significant change in strength was observed for any combination of paint and nanofibers.

中文翻译：

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纳米纤维在商业漆膜中的拉伸优势

分散相聚合中的聚合诱导自组装 (PISA) 能够以商品涂料中使用所需的数量和成本合成纤维和其他自组装纳米结构。在这里，我们研究了在两种具有不同玻璃化转变温度 ( T _g )的商品油漆的涂料中添加三种类型的纤维的效果。分析的成膜（FF）纤维和硬质聚苯乙烯（PS）纤维是通过RAFT-PISA以约20克规模合成的，具有良好的纯度（分别为75％和63％），并且还证明了公斤级合成。这些纤维以及天然来源的微纤化纤维素纤维被添加到涂料中，并测试了它们对所产生涂层的耐污性和拉伸性能的影响。添加的纤维含量由涂覆涂料所需的粘度决定。两种油漆涂层的延展性均随着高Tg PS 纤维的添加而降低，而延展性和韧性则随着低Tg FF 纤维的添加_而增加。人们发现纤维素纤维在低负载下增加了延展性，但反过来又增加了亲水性和吸湿性成分，使油漆暴露在更多的染色中。相比之下，FF 纤维除了具有拉伸性能外，还显示出抗污性的显着改善。对于油漆和纳米纤维的任何组合，都没有观察到强度的显着变化。