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    • 31. 发明授权
    • Microporous materials
    • 微孔材料
    • US5238613A
    • 1993-08-24
    • US835019
    • 1992-02-12
    • David M. Anderson
    • David M. Anderson
    • A61F2/14B01D67/00B01D69/02B01D69/14C08J9/26C12N7/02C12N11/08H01M2/16H01M8/10
    • B01D67/0006A61F2/14A61F2/15B01D67/003B01D69/02B01D69/141B82Y10/00B82Y30/00C08J9/26C12N11/08C12N7/00H01M2/1653H01M8/1062B01D2323/18B01D2323/34B01D2325/02B01D2325/026B01D2325/10B01D2325/42C12N2710/00051
    • A new type of polymeric microporous membrane has been synthesized which is distinguished by a highly-branched porespace morphology that is continuous and triply-periodic, and thus very precisely controlled and easily characterized. The membrane consists of a polymeric matrix containing pores of diameter on the order of 10 nm connected into a continuous pore network exhibiting long-range three-dimensional order. This long-range order is evidenced in small-angle X-ray scattering (SAXS) experiments by Bragg reflections that index to a triply-periodic space group, as well as in electron micrographs that match predictions from a theoretical model of the same space group and lattice parameter. The membrane combines three important features that have not been present simultaneously in any prior art membrane having pore diameters between 2 nm and 1 micron. First, the pores are identical in size and shape to a very high degree, and their size can be controlled in the synthesis. Second, the porespace is characterized by intricate branching and reconnections, with at least three pore throats meeting at a given pore body, this number (the coordination number) being the same for each pore body, and the porespace is isotropic in the cases where the space group is cubic. These two features allow accurately controlled sieving on the basis of particle size and shape, and provide highly accessible and precisely shaped pore bodies and surfaces for other applications such as catalysis, ion exchange, and the preparation of metal microstructures. And third, the membrane has a high porosity (approximately 90%).
    • 已经合成了一种新型的聚合物微孔膜,其特征在于具有连续和三次周期性的高分支孔隙形态,因此非常精确地控制和容易地表征。 该膜由含有直径约10nm的孔的聚合物基体组成,连接到呈现长距离三维顺序的连续孔网络中。 通过布拉格反射的小角度X射线散射(SAXS)实验证明了这种长距离顺序,其指数为三重周期性空间群,以及与来自相同空间群的理论模型的预测相匹配的电子显微照片 和晶格参数。 膜结合了在现有技术的孔径在2nm和1微米之间的膜中并未存在的三个重要特征。 首先,孔的尺寸和形状都非常高度地相同,并且它们的尺寸可以在合成中控制。 第二,孔隙的特征是复杂的分支和重新连接,至少三个孔喉在给定的孔体上相遇,这个数目(配位数)对于每个孔体是相同的,并且在空间是各向同性的,在 空间组是立方体。 这两个特征允许基于粒度和形状进行精确控制的筛分,并且为其它应用如催化,离子交换和金属微结构的制备提供高度可及且精确成形的孔体和表面。 第三,膜具有高孔隙率(约90%)。