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Development of the Ultra Lubricant Films for the Hard Disk Using Polymer Langmuir-Blodgett Films

使用聚合物 Langmuir-Blodgett 薄膜开发硬盘用超润滑薄膜

基本信息

批准号：
06555282
负责人：
MIYASHITA Tokuji
金额：
$ 4.03万
依托单位：
TOHOKU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

项目摘要

1. A Highly Ordered Structure in N-Octadecylacrylamide Langmuir-Blodgett MultilayrsFT-IR spectroscopic measurements (polarized transmission and reflection absorption spectra) of N-octadecylacrylamide (ODA) LB films indicate that ODA molecules are oriented nearly perpendicular to the surface of the plate ; moreover they are ordered in the plane along the dipping direction (in-plane order). That is, ODA LB films have a high biaxial orientation. A drastic dichroism in polarized FT-IR caused by the large anisortropic arrangement of ODA molecules was observed, whereas that was not observed for the corresponding acrylate derivative.2. Frictional Properties of Polymer Langmuir-Blodgett Film for Poly (N-Dodecylacrylamide)Frictional properties of polymer Langmuir-Blodgett films of Poly (N-Dodecylacrylamide)(pDDA) are investigated. The frictional force for two monolayrs pDDA LB film is 4 times smaller than that of glass substrate. The frictional force for pDDA LB films is also stable during tran … More sit of the slider, whereas that for the glass substrate increases with the number of transits. The kinetic frictional coefficient remains about 0.2 with increasing number of monolayrs. It was demonstrated that lubricating phenomena appear even at one monolayr of highly ordered ultrathin pDDA LB films.3. Spreading Behavior of Monolayrs of Poly (N-alkylacrylamide) with Fluorocarbon Side Chains and Langmuir-Blodgett FilmsPoly (N-alkylacrylamide) with different lengths of fluorocarbon side chains were prepared by radical polymerization. The spreading behavior of the amphiphilic polymer monolayrs at the air-water interface was studied. The characterization of the LB films was also investigated by measurement of surface pressure-area isotherm. The spreading behaviors and the LB film formation were strongly dependent on the length of the side chains with a short side chain (3 carbon atoms) forms an expanded monolayr, while that with longer side chains (7,8 and 10 carbon atoms) forms a condensed monolayr. Polymers with side chains (3,7 and 8 carbon atoms) can be easily transferred onto solid substrates, and uniform LB films can be prepared. Less

1. N-十八烷基丙烯酰胺LB膜中的高度有序结构对N-十八烷基丙烯酰胺（ODA）LB膜的红外光谱（偏振透射和反射吸收光谱）的测量表明，ODA分子取向几乎垂直于板的表面，而且它们在平面内沿沿着倾斜方向有序（面内有序）。也就是说，ODA LB膜具有高双轴取向。在偏振红外光谱中观察到了ODA分子的大的各向异性排列引起的强烈的二向色性，而相应的丙烯酸酯衍生物没有观察到.研究了聚N-十二烷基丙烯酰胺（pDDA）的LB膜的电性能。两层pDDA LB膜的摩擦力比玻璃基底小4倍。pDDA LB膜的摩擦力在传输过程中也是稳定的 ...更多信息而对于玻璃基板，则随着转变次数的增加而增加。随着单层数的增加，动摩擦系数保持在0.2左右。结果表明，即使在单层高度有序的双pDDA LB膜上也会出现润滑现象.含氟碳侧链的聚N-烷基丙烯酰胺单层膜及LB膜的铺展行为通过自由基聚合制备了含不同长度氟碳侧链的聚N-烷基丙烯酰胺。研究了两亲性聚合物单分子膜在空气-水界面上的铺展行为。LB膜的表征也进行了研究，通过测量的表面压力面积等温线。侧链的长度对LB膜的铺展行为和成膜有很大的影响，短侧链（3个碳原子）形成的单层膜是膨胀的，而长侧链（7、8和10个碳原子）形成的单层膜是凝聚的。具有侧链（3、7和8个碳原子）的聚合物可以容易地转移到固体基底上，并且可以制备均匀的LB膜。少