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首页> 外文期刊>Journal of Applied Polymer Science >Atomic force microscopy of cellulose membranes prepared from the N-methylmorpholine-N-oxide/water solvent system
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Atomic force microscopy of cellulose membranes prepared from the N-methylmorpholine-N-oxide/water solvent system

机译：由N-甲基吗啉-N-氧化物/水溶剂体系制备的纤维素膜的原子力显微镜

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Cellulose membranes were obtained by solutions of cellulose being cast into a mixture of N-methyl-morpholine-N-oxide (NMMO) and water under different processing conditions. Atomic force microscopy (AIM) was used to investigate the surface structures of the membranes. The AIM method provided information on both the size and shape of the pores on the surface, as well as the roughness of the skin, through a computerized analysis of AIM micrographs. The results obtained showed that the surface morphologies were intrinsically associated with the permeation properties. For the cellulose membranes, increasing the NMMO concentration and the temperature of the coagulation bath led to higher fluxes and lower bovine serum albumin rejection. These were always correlated with higher values of the roughness parameters and larger pore sizes of the membrane surfaces. When the cellulose concentration of the casting solution was 11 wt %, the membrane showed a nodular structure with interconnected cavity channels between the agglomerated nodules. (C) 2002 Wiley Periodicals, Inc. [References: 23]
机译：通过在不同处理条件下将纤维素溶液浇铸成N-甲基-吗啉-N-氧化物（NMMO）和水的混合物来获得纤维素膜。原子力显微镜（AIM）用于研究膜的表面结构。通过对AIM显微照片进行计算机分析，AIM方法可提供有关表面孔的大小和形状以及皮肤粗糙度的信息。获得的结果表明，表面形态与渗透性能具有内在联系。对于纤维素膜，增加NMMO浓度和凝固浴温度会导致较高的通量和较低的牛血清白蛋白排斥率。这些总是与较高的粗糙度参数值和较大的膜表面孔径相关。当流延溶液的纤维素浓度为11wt％时，膜显示出结节结构，在结节之间具有相互连接的空腔通道。 （C）2002 Wiley Periodicals，Inc. [参考：23]

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