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疏水/超疏水Ti合金表面液滴的運(yùn)動(dòng)特性
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大連海事大學(xué)交通運(yùn)輸裝備與海洋工程學(xué)院,大連海事大學(xué)交通運(yùn)輸裝備與海洋工程學(xué)院,大連海事大學(xué)交通運(yùn)輸裝備與海洋工程學(xué)院,大連海事大學(xué)交通運(yùn)輸裝備與海洋工程學(xué)院

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TG146.2

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Dynamic Characteristics of drop moving on hydrophobic/superhydrophobic Ti alloy surface
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    摘要:

    采用激光加工技術(shù)在Ti6Al4V合金表面構(gòu)建點(diǎn)陣微結(jié)構(gòu),利用自組裝分子膜技術(shù)在微結(jié)構(gòu)表面沉積低表面能物質(zhì),制備疏水/超疏水表面。采用自制測試系統(tǒng)測試液滴在試樣表面的靜態(tài)接觸角和滾動(dòng)角,用高速攝像機(jī)拍攝液滴滴落到試樣表面的運(yùn)動(dòng)過程。結(jié)果表明,經(jīng)激光加工和低表面能修飾構(gòu)建的Ti6Al4V疏水/超疏水表面,其表面靜態(tài)接觸角隨點(diǎn)陣間隔的增大而減??;液滴靜態(tài)接觸角與液滴滴落高度相關(guān),同一表面上的液滴靜態(tài)接觸角由最后一次滴落高度決定。液滴滴落到水平試樣表面的鋪展系數(shù)由試樣表面粗糙度和靜態(tài)接觸角決定,表面粗糙度和靜態(tài)接觸角越大,液滴鋪展系數(shù)越??;液滴在傾斜表面的鋪展系數(shù)隨傾斜角度的增大而減小,跳躍距離隨傾斜角度的增大而增大。液滴在傾斜表面的滴落運(yùn)動(dòng)受液滴滴落高度、試樣表面滾動(dòng)角和傾斜角度的影響。

    Abstract:

    Dotted matrix structures on Ti6Al4V surfaces with different spacing were manufactured by laser technology. The low surface energy materials were deposited on above Ti6Al4V substrates by self-assembled technique in order to prepare hydrophobic/superhydrophobic surfaces. The static contact angle and roll angle of all specimens were measured by self designed measuring system. The moving process of drop dripping was recorded by high speed camera system. The results indicate that the hydrophobic/superhydrophobic surfaces can be gained by dotted matrix structure manufacturing and self-assembled technique, and the contact angle decreases with the spacing of dotted matrix increasing. The static contact angle is relevant to the height of drop dripping, and depends on the drop volume and the last dripping height. The spreading coefficient of drop on the horizontal surface is determined by the roughness and static contact angle, the bigger the roughness and static contact angle is, the smaller the spreading coefficient. With the increase of slope angle, the spreading coefficient decreases and the jump distance increases. The movement of drop dripping on slope surfaces is greatly influenced by the dripping height, roll angel and slope angle.

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引用本文

李小磊,張磊,馬曉雯,張會(huì)臣.疏水/超疏水Ti合金表面液滴的運(yùn)動(dòng)特性[J].稀有金屬材料與工程,2016,45(6):1455~1460.[lixiaolei, zhanglei, maxiaowen, zhanghuichen. Dynamic Characteristics of drop moving on hydrophobic/superhydrophobic Ti alloy surface[J]. Rare Metal Materials and Engineering,2016,45(6):1455~1460.]
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  • 收稿日期:2015-08-31
  • 最后修改日期:2015-12-10
  • 錄用日期:2015-12-11
  • 在線發(fā)布日期: 2016-10-08
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