【作者】 金万慧；

【导师】 胡国樑；

【作者基本信息】 浙江理工大学 ， 纺织材料与纺织品设计， 2012， 硕士

【摘要】 本论文以探索不同的工艺制备条件对土木工程专用的固液分离膜的结构与性能的影响为目的，研究了利用平板热压法制备的土木工程用非对称固液分离膜的结构与性能，探索了层压法制备分离膜的新思路。从热压条件出发，通过调节平板对聚丙烯针刺非织造基布的热压温度和时间制备出了具有良好渗透性能的土木工程用非对称固液分离膜，并对其主要性能进行了表征，得出了最佳的平板热压法制备条件。通过在聚丙烯微孔膜表面涂覆胶水或铺撒粉末粘合剂然后层压到基布上的方法制备了胶水粘结法分离膜和粉末粘结法分离膜，也对其主要性能进行了表征，为土木工程用非对称固液分离膜的研究拓宽了思路。主要研究内容有：在不同热压条件下采用平板热压法、胶水粘结法、粉末粘结法制备分离膜并对其主要性能进行表征；探讨热压条件对分离膜各项性能的影响并总结出最佳工艺。三种制备方法工艺简单、操作方便、可行性强；随着热压温度的升高和热压时间的延长，厚度、孔径及透气性减小，导水性增大，平板热压法分离膜的渗水性能良好，胶水粘结法和粉末粘结法制备的分离膜渗水性能极差；热压温度/热压时间为165℃/2s或170℃/2s时，平板热压法分离膜可获得较好的拉伸性能，110℃/2s时粉末粘结法分离膜可获得较好的拉伸性能，130℃/2s时粉末粘合法分离膜可获得较好的拉伸性能。研究结果表明，平板热压法的热压温度/热压时间分别为165℃/2s或170℃/2s时可获得渗透性能优良的适合混凝土工程用的分离膜；胶水粘结法和粉末粘结法制备的分离膜透气性尚可但渗水性极差，使用于气液分离或气固分离。更多还原

【Abstract】 This project researches hot plate Civil Works Asymmetric Solid-liquid SeparationMembrane’s (CASSM) structure and properties, and explores the new method for preparationseparation membrane. By means of changing hot-pressing temperature and time of the platewhich presses the polypropylene (PP) needled nonwoven base fabrics can get CASSM which hasa good penetration. The new method is that laminates the PP microporous membrane on the PPneedled nonwoven base fabrics to get CASSM, and uses polyacrylic ester class glue andpolythene(PE) powder as the binder. The paper gets the best hot-pressing temperature and timein hot plate method and broads the idea in new methods.The main research contents: Prepares sample which are including the hot plate membranesand laminated membranes, tests the samples’ main performance and researches the influence ofhot pressing conditions on membrane’s properties. The three methods are useful that the processis simple and the operation is convenient. Along with the increase of temperature and theextension of time, thickness, aperture and permeability decreases and hydraulic conductivityincreases. The hot plate membrane has a good penetration, but the laminated membranes’penetration is poor. The hot plate membrane can get a good tensile properties whentemperature/time is165℃/2s or170℃/2s, the glue membrane can get a good tensile propertieswhen temperature/time is110℃/2s and the powder membrane is130℃/2s.The result shows that when temperature/time is165℃/2s or170℃/2s the hot platemembrane has the best properties which is suitable for concrete works. The glue membrane andthe powder membrane in this paper just apply to gas-liquid separation or Gas-solid separation forgood water seepage control performance.更多还原