【作者】 涂洁；

【导师】 张晨；

【作者基本信息】 北京化工大学 ， 材料科学与工程， 2010， 硕士

【摘要】 多孔材料由于具有各种优异的性能,已经成为一种应用广泛的功能材料。本文首先利用浓乳液聚合法制备了环氧树脂多孔材料,然后对其孔表面进行亲水改性,从而扩大此种环氧树脂多孔材料的应用领域。主要工作如下：1、利用浓乳液聚合法制备了环氧树脂多孔材料。利用扫描电镜研究了乳化剂用量、连续相预固化时间及分散相中二氧化硅胶体粒子溶度对环氧树脂浓乳液体系稳定性及环氧树脂多孔材料孔结构的影响。发现乳化剂的存在,对连续相进行适当的预固化,在分散相中加入二氧化硅胶体粒子均会提高浓乳液的稳定性,三者用量的改变均会影响多孔材料的孔结构；2、对环氧树脂多孔材料的孔表面进行亲水改性。通过溶胀法将引发剂固定在环氧树脂多孔材料的孔表面,进而在其表面接枝聚丙烯酸亲水层。研究了改性过程中溶胀用溶剂、环氧树脂多孔材料的固化时间及溶胀时间对改性效果的影响。不同的溶胀溶剂对改性的效果各不相同；环氧树脂多孔材料的固化时间越长,改性效果越差；溶胀时间越长,改性效果越好。利用扫描电镜测试、透射电镜测试、X射线电子能谱测试、压汞法测试、接触角测试及吸水率测试对比研究了改性前后的环氧树脂多孔材料的孔结构和亲水性能等。发现与未改性的环氧树脂多孔材料相比,改性后的环氧树脂多孔材料的孔内壁被聚丙烯酸亲水接枝层覆盖,且其亲水性有了明显的提高。更多还原

【Abstract】 Because of the outstanding performance of porous materials, they were becoming one kind of functional material which has widespread application. In this dissertation, a porous epoxy monolith was firstly prepared via a concentrated emulsion polymerization, then, the pore surfaces of the monolith were modified. As a result, the application field of the modified porous epoxy monolith would expand. The main work of the dissertation was as following:1. Preparation the porous epoxy monoliths via a concentrated emulsion template. The effect of the emulsifier content, the pre-curing time of the continuous phase and the colloidal silica amount of the aqueous phase on the stability of the epoxy concentrated emulsion and pore structure of the porous epoxy monolith were studied by scanning electron microscopy. The emulsifier, the pre-curing of the continuous phase and the colloidal silica in the aqueous phase all did attribution to the stability of the concentrated emulsion, the change of their amount would affect the pore structure of the porous epoxy monolith. 2. Hydrophilic modification was carried out to porous epoxy monoliths via pore surface-initiated graft polymerization. The initiator was immobilized on the pore surface by swelling the porous epoxy monolith with acetone solution of initiator, then the acrylic acid polymerized on the pore surface. The solvent used for swelling, the curing time of the porous epoxy monolith and the swelling time were also studied. Different swelling solvent got the different modification result; the longer the curing time of the porous epoxy monolith got the worse the modification result; the modification result was good as the swelling time last long. The morphology and the hydrophilic property of unmodified and modified porous epoxy monoliths were studied contrastively by scanning electron microscopy, transmission electron microscopy, energy-dispersive spectrometer, mercury instrusion porosimetry measurement, content angle measurement and water absorption. Compare with the unmodified porous epoxy monolith, the pore surface of the modified porous epoxy monolith was covered by poly acrylic acid layer, and the hydrophilic property of the modified porous epoxy monolith was improved obviously.更多还原