文档介绍：北京化工大学硕士学位论文亲水/亲油多孔材料的制备姓名:李璇申请学位级别:硕士专业:材料学指导教师:杜中杰 20080528 摘要亲水/亲油多孔材料的制备摘要多孔材料的应用正日益广泛,本文通过合成一种新型多孔材料使之具备对环境的自我调节能力,这种多孔材料的孔径可根据环境湿度的变化而变化,从而可以在某些特殊领域中应用。实验中以亲油性单体苯乙烯(PS)以及亲水性单体丙烯酰***㈣为例进行基础研究,首先通过反相浓乳液聚合(W/O)的方法合成聚苯乙烯(PS)多孔基体,然后利用浸泡的方式在基体中合成聚丙烯酰***(YAM), 由于聚合中存在体积收缩,因此得到的复合材料仍具有一定的自由孔隙。将PS/PAM复合材料用扫描电镜(SEM)观察,发现为连续的互穿结构,同时孔径随AM浓度的增加而减小。另外,我们用压***测孔法(MIP)对不同PS基体制备的复合材料进行了孔隙率和孔径的研究,发现孔隙率随浓乳液分散相体积分数的增加而增大,材料中始终存在两种孔, 大孔孔径为10/am左右,小孔为3/an左右,孔径变化不大。实验中对采用不同浓度AM溶液合成的复合材料进行了吸水性以及饱和水蒸气渗透性实验,两者实验结果相似,AM浓度越高,吸水率越低,在饱和水蒸气中达到闭孔的时间越短,反之,则吸水率越高,闭孔时间越长。通过以上研究,我们可以知道这种复合材料在低湿度条件下能够保持高透过性,当湿度增加的时候渗透性降低,从可实现对环境的自我调节。关键词:浓乳液,多孔材料,聚苯乙烯,聚丙烯酰***,渗透北京化工大学硕士学位论文 PREn钔RATIoN oFHYDRoPmLIC/HYDRoPHoBIC PORoUS M讼TERIAI,S ABSTRACT In recent years,porous materials are ing widely used and much attention hasbeen focused thisarticle,our aimwas tosynthesize a novel porous material which had the ability to adapt environment kind ofmaterial canadjust thehumidity ofenvironment SO astobeused inspecial fields. As asample work,polystyrene(PS)and polyacrylamide(PAM)were selected as the hydrophobic and hydrophilic polymers, open-celled PS matrix was firstprepared by verse concentrated emulsion polymerization(w/o).Then the porous matrix was impregnated inAM solution which subjected topolymerize inthecellsand intercellular pores. Because ofthevolume contraction during polymerization,some free space existed inthePS/posite. Scanning Electron Microscopy(SEM)was used tostudy themorphology resultsshowed thatPAM was rated inthecellsand intercellular pores of PS matrix,and the pore sizewas increased as the increasing ofAM porosity and thepore sizedistribution were recorded byMercury IntrusionPorosimetry(MIP).As theincreasing of H 摘要 volume fraction oftheconcentrated emulsion,the porosity was kinds ofpores existed posite,and thepore sizeofthelarge one and thesmall one are lOban and3/on, absorption andvapor permeation