Constructing high load-carrying capacity dual-layer film assembled from alkylsilane and semi-spherical molecules
Constructing high load-carrying capacity dual-layer film assembled from alkylsilane and semi-spherical molecules
复制标题
烷基硅烷与半球形分子组装而成的高承载能力双层薄膜
DOI：
10.1016/j.mee.2015.12.010
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发表时间：
2016-02-20
影响因子：
2.3
通讯作者：
Zhang, Junyan
中科院分区：
文献类型：
--
作者：
Chen, Li;Li, Na;Zhang, Junyan
采用两步法在硅衬底上制备了由氨基硅烷和半球形分子组成的双层薄膜。将3-[2-（2-氨基乙氨基）乙氨基]丙基三甲氧基硅烷（TA）自组装在硅表面形成氨基封端的底层，然后与六氯三苯并三喹并苯（HCTQ）通过表面偶联反应形成第二层。分析了薄膜的形成和结构，并分别评价了薄膜的纳米和微米摩擦学性能。结果表明，双层膜具有优异的减摩抗磨性能，这是由于氢键作用增强了膜层的稳定性，同时外层具有较高的刚性。换句话说，具有内部氢键的交联底层增强了膜抵抗摩擦对应物球的稳定性，并且HCTQ分子中的刚性主链提高了双层膜的承载能力。高沿着性和上级承载能力使得这些分子膜非常有希望成为MEMS/NEMS的新一代分子润滑剂。(C)2015爱思唯尔B. V.保留所有权利。
A dual-layer film composed of alkylsilane with amino groups and semi-spherical molecules was constructed on silicon substrate by a two-step strategy. 3-[2-(2-aminoethylamino)ethylamino]propyl-trimethoxysilane (TA) was self-assembled on silicon surface to form amino-terminated underlayer, followed by deriving with hexachlorotribenzotriquinacene (HCTQ) through surface coupling reaction to form the second layer. The formation and structure of the as-prepared films were analyzed, and the nano- and micro-tribological properties were estimated, respectively. The results showed that the dual-layer film possesses excellent friction-reducing and anti-wear abilities, which is attributed to the combination of enhanced stability by hydrogen bonding and the high stiffness of rigid outer layer. In other words, the cross-linked underlayer with internal hydrogen bonds enhances the stability of the film against rubbing the counterpart ball, and the rigid backbone in HCTQ molecules improves the load-carrying capacity of the dual-layer film. High wear stability along with superior load carrying capacity made these molecular films very promising as a new generation of molecular lubricants for MEMS/NEMS. (C) 2015 Elsevier B.V. All rights reserved.