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Scalable and durable polymeric icephobic and hydrate-phobic coatings†
Soft Matter ( IF 3.4 ) Pub Date : 2018-03-16 00:00:00 , DOI: 10.1039/c8sm00225h
Hossein Sojoudi 1, 2, 3 , Hadi Arabnejad 3, 4, 5 , Asif Raiyan 1, 2, 3 , Siamack A. Shirazi 3, 4, 5 , Gareth H. McKinley 3, 4, 6 , Karen K. Gleason 3, 6, 7
Affiliation  

Ice formation and accumulation on surfaces can result in severe problems for solar photovoltaic installations, offshore oil platforms, wind turbines and aircrafts. In addition, blockage of pipelines by formation and accumulation of clathrate hydrates of natural gases has safety and economical concerns in oil and gas operations, particularly at high pressures and low temperatures such as those found in subsea or arctic environments. Practical adoption of icephobic/hydrate-phobic surfaces requires mechanical robustness and stability under harsh environments. Here, we develop durable and mechanically robust bilayer poly-divinylbenzene (pDVB)/poly-perfluorodecylacrylate (pPFDA) coatings using initiated chemical vapor deposition (iCVD) to reduce the adhesion strength of ice/hydrates to underlying substrates (silicon and steel). Utilizing a highly-cross-linked polymer (pDVB) underneath a very thin veneer of fluorine-rich polymer (pPFDA) we have designed inherently rough bilayer polymer films that can be deposited on rough steel substrates resulting in surfaces which exhibit a receding water contact angle (WCA) higher than 150° and WCA hysteresis as low as 4°. Optical profilometer measurements were performed on the films and root mean square (RMS) roughness values of Rq = 178.0 ± 17.5 nm and Rq = 312.7 ± 23.5 nm were obtained on silicon and steel substrates, respectively. When steel surfaces are coated with these smooth hard iCVD bilayer polymer films, the strength of ice adhesion is reduced from 1010 ± 95 kPa to 180 ± 85 kPa. The adhesion strength of the cyclopentane (CyC5) hydrate is also reduced from 220 ± 45 kPa on rough steel substrates to 34 ± 12 kPa on the polymer-coated steel substrates. The durability of these bilayer polymer coated icephobic and hydrate-phobic substrates is confirmed by sand erosion tests and examination of multiple ice/hydrate adhesion/de-adhesion cycles.

中文翻译:

可扩展且耐用的聚合物憎冰和憎水涂层

冰在表面上的形成和积聚会给太阳能光伏装置,海上石油平台,风力涡轮机和飞机造成严重问题。另外,在天然气和天然气操作中,特别是在诸如在海底或北极环境中发现的高压和低温下,由于天然气的笼形水合物的形成和积累而堵塞管道具有安全和经济方面的考虑。实际采用疏冰/疏水表面需要苛刻环境下的机械坚固性和稳定性。在这里,我们使用引发的化学气相沉积(iCVD)技术来开发耐用且机械坚固的双层聚二乙烯基苯(pDVB)/聚全氟癸基丙烯酸酯(pPFDA)涂料,以降低冰/水合物对下层基材(硅和钢)的粘附强度。我们在非常薄的富含氟聚合物(pPFDA)单板下使用高度交联的聚合物(pDVB),我们设计了固有的粗糙双层聚合物膜,可以将其沉积在粗糙的钢基材上,从而使表面呈现出逐渐减小的水接触角(WCA)高于150°,WCA磁滞低至4°。在膜上进行光学轮廓仪测量,并测量均方根(RMS)粗糙度值在硅和钢基底上分别获得R q = 178.0±17.5 nm和R q = 312.7±23.5 nm。当在钢表面上覆盖这些光滑的硬质iCVD双层聚合物膜时,冰的附着强度将从1010±95 kPa降低到180±85 kPa。环戊烷(CyC5)水合物的粘合强度也从粗糙的钢基材上的220±45 kPa降低到涂有聚合物的钢基材上的34±12 kPa。这些双层聚合物涂层的憎冰和水合憎水基材的耐用性通过沙土侵蚀测试和多个冰/水合粘附/脱粘循环的检查得到证实。
更新日期:2018-03-16
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