Structure, deposition properties, and function of polyisobutylmethacrylate (PIBM) Langmuir-Blodgett films
Structure, deposition properties, and function of polyisobutylmethacrylate (PIBM) Langmuir-Blodgett films
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聚甲基丙烯酸异丁酯 (PIBM) Langmuir-Blodgett 薄膜的结构、沉积特性和功能
DOI：
10.1016/0021-9797(89)90161-6
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发表时间：
1989
影响因子：
9.9
通讯作者：
K. Naito
中科院分区：
文献类型：
--
作者：
K. Naito
空气/纯水界面的聚甲基丙烯酸异丁酯(PIBM)单分子膜是稳定的，在大于19ä2/残留物的区域内粘度不是很大。PIBM在紧密堆积的单分子膜中的CPK分子模型预测了膜的厚度为10-11°，膜的两侧具有疏水性。这些预测与实验结果是一致的。用红外光谱研究了酯的取向度。研究了不同水接触角(θ)的PIBM单分子膜在硅衬底上的垂直沉积特性。对于疏水性硅衬底(θ=10 0°)，可以垂直多层沉积，得到均匀的Y型LB膜。对硬脂酸镉双层膜和PIBM双层膜交替形成的LB膜进行了小角X射线衍射分析，得到了PIBM膜的单分子膜厚度。已知硬脂酸镉LB膜会经历长时间的结晶(在20°C下为100天)，但发现用PIBM LB膜覆盖硬脂酸镉LB膜有效地抑制了结晶。
A polyisobutylmethacrylate (PIBM) monomolecular film at an air/pure water interface was stable and was not so viscous in the area range greater than 19 Å2/residue. The CPK molecular model of PIBM in a closely packed monomolecular film predicts a 10- to 11-Å film thickness and a hydrophobic nature for both sides of the film. These predictions are consistent with the experimental results. The ester orientation was investigated by IR spectroscopy. Vertical deposition properties of PIBM monomolecular film onto silicon substrates with various water contact angles (θ) were investigated. Vertical multilayer deposition was possible for a hydrophobic silicon substrate (θ = 100°), yielding a uniform Y-type LB film. An alternating hetero LB film of cadmium stearate bilayer and PIBM bilayer was subjected to low-angle X-ray diffraction analysis, in order to obtain the monomolecular film thickness of PIBM (11 Å). Cadmium stearate LB films are known to undergo crystallization over a long period of time (>100 days at 20°C) but it was found that covering the cadmium stearate LB film with a PIBM LB film effectively inhibited the crystallization.