文章摘要
一种防渗透硅烷纳米粒子/聚乳酸复合超疏水涂料
A novel anti-permeable superhydrophobic coating based on silane nanoparticles/PLA
投稿时间:2020-01-10  修订日期:2020-03-23
DOI:
中文关键词: 防渗透性  疏水硅烷纳米粒子  聚乳酸  疏水涂料  硅烷偶联剂
英文关键词: anti-permeable  hydrophobic silane nanoparticles  polylactic acid  superhydrophobic coating  propyl-trimethoxysilcane (KH550)
基金项目:
作者单位E-mail
孟艳芳 清华大学航天航空学院 xiangyufeiwei@163.com 
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中文摘要:
      以十六烷基硅烷与原硅酸乙酯为原料经溶胶-凝胶反应得到疏水硅烷纳米粒子,再将其加入到聚乳酸的二氯甲烷溶液中与硅烷偶联剂反应,得到一种具有优异防渗透性能的超疏水涂料。采用FTIR 和SEM对涂料结构和形貌进行了表征。红外结果表明,硅烷偶联剂不参与化学反应。SEM表明,涂料的超疏水性源自表面多级拓扑结构。接触角测试表明,硅烷纳米粒子极大地提高了涂料的防水性且接触角达到150o以上。在10min-20min时间范围内,相对于单一疏水硅烷纳米粒子(接触角降低速度150o/min)和单一聚乳酸溶液(接触角降低速度9.5o/min)涂覆 ,疏水硅烷纳米粒子/聚乳酸复合防水涂料的涂覆大幅度提高了样品的防渗透性,接触角降低速度仅仅为0.8 o/min。这是疏水硅烷纳米粒子的多级结构与聚乳酸优异的成膜性相结合的结果。
英文摘要:
      A novel unparalleled anti-permeable superhydrophobic coating was obtained by supplementing PLA/CH2Cl2 solution with silane coupling agent and hydrophobic silane nanoparticles that prepared by sol-gel reaction between hexadecyltrimethoxysilane and tetraethyl orthosilicate. The structure and morphology of the coating was characterized by FTIR and SEM. FTIR indicated silane coupling agent has not participated chemical reaction. SEM revealed that the superhydrophobic originated from the hierarchical structure morphology. The water contact angle measurement indicated the hydrophobic silane nanoparticles considerably improved the water-repellency and achieved superhydrophobicity:above 150o This superhydrophobic coating possessed the advantage of simple preparation, excellent resistance of water penetration as well as environmentally friendly. In the time-span range of 10min-20min, compared with the coating of hydrophobic silane nanoparticles (contact angle decreasing speed 150o/min) and pure coating of PLA/CH2Cl2 solution, (contact angle decreasing speed 9.5o/min) the hydrophobic silane nanoparticles/PLA solution coating has improved resistance of water penetration to a great extent, contact angle decreasing speed was merely 8o/min. The excellent anti-permeability towards water was achieved by incorporating the hierarchical structure of hydrophobic silane nanoparticles with the good film-forming property of PLA.
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