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由于粒子堆积膜的孔隙率有限,用聚合物乳液直接组装的纳米孔隙膜在膜厚和折射率的调节能力方面都受到限制,需要可以单独调控粒子膜孔隙率的手段.将聚甲基丙烯酸甲酯(PMMA)和聚苯乙烯(PS)的二元混合乳液在PMMA基板上旋涂,再用环己烷选择性溶去PS粒子得到了超低反射的纳米孔隙膜.改变混合乳液的组成可以调节多孔膜的空隙率,使多层纳米孔隙膜的有效折射率从1.36降低到1.07;调节旋涂速度和成膜乳液的浓度可以控制孔隙膜的厚度.在优化的条件下,在PMMA基板上制备的孔隙膜在波长585nm处的最低反射率仅0.03%、在450～800nm的可见光谱范围内的平均反射率低于0.4%.以本方法制备的纳米孔隙膜有较好的稳定性,在水中用超声波清洗30min后,膜的低反射性能几乎不变. 相似文献
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In this paper two newly developed hypercrosslinked resins were used to treat micropolluted drinking water and their static and kinetic adsorption were investigated at 293 K. The results show that these two adsorbents are superior to Amberlite XAD-4 for removing chloroform and trichloroethylene in aqueous solutions. The breakthrough capacity and the total capacities from mini-column adsorption studies for chloroform and trichloroethylene on XAD-4, ZH-01 and ZH-00 are calculated respectively under experimental conditions 相似文献
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