新型水填充多孔污损可脱附型防污涂层

在球磨机的作用下，氯化钠被碾磨成微米粒子，使用分散剂，将其均匀分散在有机硅树脂之中. 此混合物中添加交联剂，涂膜并加热交联后得到氯化钠粒子均匀包埋其中的有机硅弹性体涂层. 此涂层在水中浸泡后，氯化钠粒子会逐渐扩散进入水中，而水逐渐填充原本由氯化钠粒子占有的孔洞，从而形成水填充的多孔弹性体涂层. 扫描电镜图像证明了此结构的产生. 弹性体中存在的微米大小的水滴可以降低材料的剪切储能模量和增加损耗正切角. 其中剪切储能模量的降低起到了主要作用，并使材料具有更好的污损可脱附性能. 同时使用廉价的氯化钠也可以有效降低材料整体的价格.

Fouling-release Property of Water-filled Porous Elastomers

Since the fouling-releasing ability of silicone elastomers increased as their modulus decreases, we designed and prepared composites with embedded tiny NaCl crytals that were soluble after their immersion in water, resulting in water-filled porous elastomers. The scanning electron microscope images confirmed such a designed water-filling porous structure. The existence of many micro-drops of water in these specially designed elastomers decreased the shear storage modulus and increased the loss factors. The decrease of shear modulus plays a leading role here and is directly related to a lower critical peeling-off stress of a pseudo-barnacle on them. Therefore, such a novel preparation with cheap salts instead of an expensive silicone provides a better way to make fouling-release paints with a lower modulus, a lower critical peeling-off stress and a better fouling-release property without a significant decrease of the cross-linking density.