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首页> 外文期刊>Journal of industrial and engineering chemistry >Preparation and characterization of surfactant-induced nanoporous PMMA film
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Preparation and characterization of surfactant-induced nanoporous PMMA film

机译：表面活性剂诱导的纳米多孔PMMA膜的制备与表征

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摘要

Porous polymer films were prepared by spin-coating of PMMA solutions that-contained surfactant (sodium dodecylbenzenesulfonate, NaDDBS) at concentrations higher than the critical micelle concentration, and by selectively removing the water-soluble surfactant molecule in distilled water. After removal of NaDDBS, the nanoporous structure was confined by FE-SEM. The resulting pore size was found to be much smaller than the wavelength of the visible light, and therefore, the nanoporous thin films were optically homogeneous. However, when the film was prepared with 30 wt% porogen loading, the resulting porous film became quite opaque and the refractive index could not be measured. The size and the total volume of the pores in the PMMA film increased with the increase in the porogen concentration. Upon increasing the amount of the surfactant in the film, the refractive index of the nanoporous PMMA film changed from 1.493 to 1.483. The refractive index of the nanoporous polymer film was found to be inversely proportional to the porogen concentration and the pore volume. Transparent PMMA films containing nanoscale pores randomly distributed throughout the film thickness are expected to be versatile in optical applications such as the optical waveguide.
机译：通过在高于临界胶束浓度的浓度下旋涂PMMA溶液的PMMA溶液（十二烷基苯磺酸钠，NADDB）并选择性地除去蒸馏水中的水溶性表面活性剂分子，制备多孔聚合物膜。除去NADDB后，纳米多孔结构由Fe-SEM限制。得到的孔径被发现远小于可见光的波长，因此，纳米多孔薄膜是光学均匀的。然而，当用30wt％致孔剂负载制备薄膜时，所得的多孔膜变得非常不透明，并且无法测量折射率。 PMMA膜中孔隙的尺寸和总体积随着孔泡浓度的增加而增加。在增加膜中表面活性剂的量时，纳米电孔PMMA膜的折射率从1.493变为1.483。发现纳米多孔聚合物薄膜的折射率与致孔剂浓度和孔体积成反比。含有随机分布在整个膜厚度的纳米级孔的透明PMMA膜预计在诸如光波导的光学应用中是通用的。

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