磁响应柔性复合超疏水光热薄膜用于被动防冰/主动除冰

ty10086 提交于 周三, 08/25/2021 - 15:37
文章英文标题
Magnetic responsive and flexible composite superhydrophobic photothermal film for passive anti-icing/active deicing
正文
冰的形成和积累会导致严重的经济损失甚至生命损失。为了防止这些损失,近年来防冰材料得到了迅速的发展。为了应对不同的结冰条件和不同类型的部件,迫切需要开发一种兼具被动防冰和主动除冰功能的表面。然而,迄今为止还没有合适的防冰材料的解决方案,它具有足够的耐久性、低成本和制作简单等优点,在必要时也可以转化为活性除冰。在此,我们展示了一种由聚二甲基硅氧烷( PDMS )、铁粉( Fe )和蜡烛烟( CS )组成的具有磁响应性和柔性的超疏水光热膜( PFe- PCS ),该膜不使用含氟化学物质,通过简单的方法显示了被动防冰和主动除冰的性能。薄膜由两个超疏水层组成,可以在微/纳米结构中捕捉到两个空气层。因此,冻结时间是裸基材的4.7倍。这样设计的表面结构不仅显著延迟了水的冻结时间,而且通过在光热加热过程中保持顶面内的热量,使热损失最小化。积冰在237   s内可立即融化,融化水可迅速滚落。PFe- PCS薄膜可通过磁力作用于包括弯曲衬底在内的复杂形状的衬底。更重要的是,PFe- PCS薄膜在暴露于强酸、碱、盐溶液和液氮中时表现出优异的稳定性。经过320次循环砂纸磨损、3   h水流冲击和循环复冰/除冰后,超疏水和抗冰性能得到了很好的保持,本工作源于被动抗冰和主动除冰的双层表面结构概念。该薄膜具有坚固性和自愈性,可用于各种形状部件的防冰和清除。
文章内容(英文)
The formation and accumulation of ice can lead to severe economic loss or even loss of life. To prevent these losses, there has been rapid development in icephobic materials in recent years. To deal with various icing conditions and different types of components, it is highly desirable to develop a surface that possesses both passive anti-icing and active deicing functions. However, so far there is no suitable solution for anti-icing material with adequate durability, low cost, and simplicity in fabrication that can also be turned into active deicing when necessary. Here, we demonstrate a magnetically responsive and flexible superhydrophobic photothermal film (PFe-PCS) consisting of polydimethylsiloxane (PDMS), iron powder (Fe), and candle soot (CS). The film displayed both passive anti-icing and active deicing performances by a simple approach without using fluorine-containing chemicals. The film consists of two superhydrophobic layers that can trap two air layers in the micro/nano structures. As a result, the freezing time is 4.7 times of that of bare substrate. Such designed surface structure not only displays a significant delay in water freezing time, but also minimizes heat loss by keeping the heat within the top surface during photothermal heating. The accumulated ice can be immediately melted in 237 s and the melted water can be rapidly rolled off. The PFe-PCS film can be applied to substrates with complex shapes including curved substrates via magnetic force. More importantly, the PFe-PCS film displayed excellent stability when exposed to strong acid, base, salt solutions and liquid nitrogen. The superhydrophobicity and anti-icing performances were well retained after 320 cycles sandpaper abrasion, 3 h water flow impact, and cyclic icing/deicing. This work originated the concept of double layered surface structure for both passive anti-icing and active de-icing. The film is robust and self-healing, making it potentially applicable for ice prevention and removal for various shaped components.
来源出处
Journal|[J]Chemical Engineering JournalVolume 427, 2022.
谷歌学术影响力
[db:学术影响力]
DOI
https://doi.org/10.1016/J.CEJ.2021.130922

PDMS臻品推荐

PDMS-微流控基质材料-PDMS/道康宁SYLGARD184-聚二甲基硅氧烷/0.5KG(组)

产品说明书PDF自助在线看:http://www.pdmshub.com/sih

信息更新:

美国总工厂生产的0.5KG原始包装的PDMS延期至2021年9月16日后才能交货,默认我们将发国内库存的进口分装产品(02085925-0.5KG);另受制于有机硅大幅涨价潮影响,2021年9月1日后将上调销售价格,另行通知。Dow Corning=道康宁=Dow SiL=陶氏,都是同一家公司。 2021.09.01更新

美国总工厂生产的0.5KG包装的PDMS恢复正常进口,合法正规,质量金标准,欢迎订购使用。并承诺从我司购买的皆为原厂包装,100%未开封,附带技术手册,非国产灌装仿制、非分装、非仿冒外包装产品,可以放心使用。大量订购更有优惠。2021.04.01更新

备注:由于dowsil与道康宁公司合并,美国总工厂生产的PDMS,价格涨幅高达1倍之多,因针对科研用户使用,特备货规格0.5KG。如果您需要美国总工厂原厂生产的大规格包装的预定,可以与QQ 11366508联系给予报价/货期。2021.05更新

此链接为PDMS-微流控芯片/PDMS/道康宁SYLGARD184/小桶0.5KG装的链接。

一般性的产品性能参数表参考以下小桶装的参数:

微流控芯片/PDMS/道康宁SYLGARD184;微流控芯片/PDMS/道康宁SYLGARD184;微流控芯片/PDMS/道康宁SYLGARD184;

品牌型号:道康宁SYLGARD184

包装规格:0.5KG/罐[含有45.4g固化剂,总重量为0.5KG]

产品颜色:保质期限:36个月

存放环境说明:室温,阴凉处保存

备注说明:

美国道康宁道康宁SYLGARD 184硅橡胶是由液体组分组成的双组分套件产品,包括基本组分与固化剂。基本组分与固化剂按10:1重量比完全混合,中等粘度混合液的稠度与SAE 40机油相似。无论厚薄,混合液将固化成为具有韧性的透明弹性体,最适用于电子/电气方面的封装与灌封应用。 道康宁SYLGARD 184硅橡胶在25~150℃的温度范围内固化,无放热现象,无需二次固化。固化过程完成后,可立即在-55~200℃的温度范围内使用。 产品特性:低毒性,在常规的工业操作中,无特别的注意事项; 无溶剂或固化副产物, 固化时不放热;无需特殊的通风条件,不会产生腐蚀;固化时,收缩量小; 固化后, 透明具有弹性;抗震与减缓机械震动;振动的传递性能小;元件可裸视检查与易修补性; 环保性能;低吸水性,良好的耐辐射性能;高真空状态下的低漏气性; 优异的电性能;较大温度范围内的稳定性, 抗解聚;在-55~200℃范围内,甚至在密闭状态下保持弹性与柔韧性,性能稳定; 阻燃性,UL可燃性分级为94 V-1,温度等级:130℃ 产品用途: 道康宁SYLGARD 184硅橡胶在电气/电子的封装与灌封方面有广泛的应用。